Relevant bibliographies by topics / Erosion

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Erosion'

Author: Grafiati
Published: 4 June 2021
Last updated: 26 April 2025

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Erosion.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Journal articles on the topic "Erosion"

1

Barnabe, Cheryl, Dominique Toepfer, Hubert Marotte, Ellen-Margrethe Hauge, Andrea Scharmga, Roland Kocijan, Sebastian Kraus, et al. "Definition for Rheumatoid Arthritis Erosions Imaged with High Resolution Peripheral Quantitative Computed Tomography and Interreader Reliability for Detection and Measurement." Journal of Rheumatology 43, no. 10 (October 2016): 1935–40. http://dx.doi.org/10.3899/jrheum.160648.

Full text
Abstract:
Objective.High-resolution peripheral quantitative computed tomography (HR-pQCT) sensitively detects erosions in rheumatoid arthritis (RA); however, nonpathological cortical bone disruptions are potentially misclassified as erosive. Our objectives were to set and test a definition for pathologic cortical bone disruptions in RA and to standardize reference landmarks for measuring erosion size.Methods.HR-pQCT images of metacarpophalangeal joints of RA and control subjects were used in an iterative process to achieve consensus on the definition and reference landmarks. Independent readers (n = 11) applied the definition to score 58 joints and measure pathologic erosions in 2 perpendicular multiplanar reformations for their maximum width and depth. Interreader reliability for erosion detection and variability in measurements between readers [root mean square coefficient of variation (RMSCV), intraclass correlation (ICC)] were calculated.Results.Pathologic erosions were defined as cortical breaks extending over a minimum of 2 consecutive slices in perpendicular planes, with underlying trabecular bone loss and a nonlinear shape. Interreader agreement for classifying pathologic erosions was 90.2%, whereas variability for width and depth erosion assessment was observed (RMSCV perpendicular width 12.3%, axial width 20.6%, perpendicular depth 24.0%, axial depth 22.2%; ICC perpendicular width 0.206, axial width 0.665, axial depth 0.871, perpendicular depth 0.783). Mean erosion width was 1.84 mm (range 0.16–8.90) and mean depth was 1.86 mm (range 0.30–8.00).Conclusion.We propose a new definition for erosions visualized with HR-pQCT imaging. Interreader reliability for erosion detection is good, but further refinement of selection of landmarks for erosion size measurement, or automated volumetric methods, will be pursued.
APA, Harvard, Vancouver, ISO, and other styles
2

Søvik, Jenny B., Alexandre R. Vieira, A. B. Tveit, and Aida Mulic. "Enamel Formation Genes Associated with Dental Erosive Wear." Caries Research 49, no. 3 (2015): 236–42. http://dx.doi.org/10.1159/000369565.

Full text
Abstract:
Dental erosive wear is a multifactorial condition that is greatly affected by environmental factors. So far, no study has investigated how dental erosive wear is influenced by variations in enamel formation genes. The aim of the present study was to investigate polymorphisms in genes involved in enamel formation and their influence on enamel susceptibility to dental erosion. DNA samples were collected from 795 Norwegian adolescents aged 16-18 years. Five single-nucleotide polymorphism markers were genotyped in selected candidate genes (ameloblastin, amelogenin, enamelin, tuftelin 1 and tuftelin interacting protein 11), reported to influence enamel formation. Allele and genotype frequencies were compared within two patient groups with dental erosions; all participants with dental erosion and only those with severe dental erosion (erosion extending into dentine). Overrepresentation of the G allele of the enamelin marker was seen in the erosion group compared to the unaffected group (p = 0.047). When erosion severity was considered, statistical significant difference in allele frequency was observed for amelogenin, with the C allele suggesting a protective role (p = 0.02). A suggestive overrepresentation of the TT genotype of the amelogenin marker was also seen in cases with severe erosion (p = 0.049) when compared to cases with no dentine erosion. Amelogenin was also associated with severe erosion in the recessive model; the TT genotype was significantly more frequent in the affected group than in the unaffected group (p = 0.01). The present study suggests that polymorphisms in enamel formation genes are statistically associated with an individual's susceptibility to dental erosive wear.
APA, Harvard, Vancouver, ISO, and other styles
3

Perl, M., C. Levy, and Q. Ma. "The Influence of Multiple Axial Erosions on the Fatigue Life of Autofrettaged Pressurized Cylinders." Journal of Pressure Vessel Technology 123, no. 3 (February 5, 2001): 293–97. http://dx.doi.org/10.1115/1.1372325.

Full text
Abstract:
Erosion geometry effects on the mode I stress intensity factor (SIF) for a crack emanating from an erosion’s deepest point in a multiply eroded, autofrettaged, pressurized, thick-walled cylinder are investigated. The problem is simulated as a two-dimensional problem and is solved via the finite element method. Autofrettage, based on von Mises yield criterion, is simulated by thermal loading and SIFs are determined by the nodal displacement method. SIFs are evaluated for a variety of relative crack lengths, a0/t=0.01-0.45 emanating from the tip of erosions of different geometries, namely, (a) semi-circular erosions of relative depths of 1–10 percent of the cylinder’s wall thickness, t; (b) arc erosions for several dimensionless radii of curvature, r′/t=0.05-0.4; and (c) semi-elliptical erosions with ellipticities of d/h=0.5-1.5, and erosion span angle, α, from 6 deg to 360 deg. The effective SIF for relatively short cracks is found to be increased by the presence of the erosion, which in turn may result in a significant decrease in the vessel’s fatigue life of up to an order of magnitude. Deep cracks are found to be almost unaffected by the erosion.
APA, Harvard, Vancouver, ISO, and other styles
4

Touma, Zahi, Arane Thavaneswaran, Vinod Chandran, Fawnda Pellett, Richard J. Cook, and Dafna D. Gladman. "Clinical and Demographic Characteristics of Erosion-free and Erosion-present Status in Psoriatic Arthritis in a Cohort Study." Journal of Rheumatology 43, no. 6 (April 1, 2016): 1057–62. http://dx.doi.org/10.3899/jrheum.150466.

Full text
Abstract:
Objective.Psoriatic arthritis (PsA) has been recognized as a severe erosive disease. However, some patients do not develop erosions. We aimed to determine the prevalence, characteristics, and predictors of erosion-free patients (EFP) as compared with erosion-present patients (EPP) among patients with PsA followed prospectively.Methods.This is a retrospective analysis conducted on patients from the Toronto PsA cohort. Patients with at least 10 years of followup and radiographs were analyzed. Radiographs were scored with the modified Steinbrocker method. Baseline (first visit to clinic) characteristics were used to predict the development of erosions with logistic regression models. To examine the effect of time-varying covariates, Cox regression models were fit for the time to development of erosions from baseline.Results.Among 290 patients, 12.4% were EFP and 87.6% were EPP over the study period. The mean time to development of erosion in the EPP over the course of followup was 6.8 ± 6.1 years. EFP were diagnosed with psoriasis at a younger age compared with EPP. In both models, actively inflamed joints and clinically damaged joints were predictive of the development of erosion, whereas a longer duration of psoriasis at baseline decreased the odds of developing erosion. EPP had a higher percentage of unemployment as compared with EFP at baseline and followup visits.Conclusion.Among patients with PsA followed for at least 10 years, 12.4% never develop erosions. The clinical and radiographic findings can ultimately assist in the stratification of a patient’s prognosis regarding the development of erosions.
APA, Harvard, Vancouver, ISO, and other styles
5

Penmetsa, G., S. Pei, B. Sauer, J. A. Walsh, B. Feng, J. Walker, K. Douglas, and J. Clewell. "POS0262 IDENTIFYING EROSIVE DISEASE FROM RADIOLOGY REPORTS OF VETERANS WITH INFLAMMATORY ARTHRITIS USING NATURAL LANGUAGE PROCESSING." Annals of the Rheumatic Diseases 80, Suppl 1 (May 19, 2021): 353.2–354. http://dx.doi.org/10.1136/annrheumdis-2021-eular.1794.

Full text
Abstract:
Background:The presence of erosive disease influences diagnosis, management, and prognosis in inflammatory arthritis (IA).Research of IA in large datasets is limited by a lack of methods for identifying erosions.Objectives:To develop methods for identifying articular erosions in radiology reports from veterans with IA.Methods:Included veterans had ≥2 ICD codes for ankylosing spondylitis (AS), psoriatic arthritis (PsA), or rheumatoid arthritis (RA) between 2005- 2019, in Veterans Affairs Corporate Data Warehouse. Chart review & annotation of radiology notes produced the reference standard, & identified erosion terms that informed classification rule development. A rule-based natural language processing (NLP) model was created & revised in training snippets. The NLP method was validated in an independent reference sample of IA patients at the snippet & patient levelsStepDescriptionNumber & example1 Radiology notesa.Select note titles potentially relevant to IAa. 35,141 notes titlesb.Extract notes with titles potentially related to IAb. 2,926,113 radiology notes2 Possible meaningful termsa.Compile list of root terms that may indicate erosiona. 11 root terms (i.e. ero*, pencil*cup, irreg*)b.Query radiology notes for root term variationsb. 1178 variations (i.e. erosion, erotic, erode)c.Select possible meaningful termsc. 179 possible terms (i.e. erosion, erode)3 Annotationa.Extract snippets^ containing possible meaningful termsa.5000 snippets from radiology notesb.Classify snippets according to: 1) Meaningful term, 2) Relevance to joint, 3) Attribution to IA, 4) Affirmationb.4068 classifications with 1017 snippets (in rounds of 50-417 snippets for NLP training & testing)4 Rule developmenta.Identify meaningful terms representing erosiona. 6 terms (pencil * cup, erosion, erosive, etc.)b.Exclude erosive processes irrelevant to joint(s)b. 28 irrelevant processes (i.e. gastric erosion)c. Exclude articular erosive processes not attributed to IAc. 5 non-IA processes IA (i.e. infection)d. Classify as affirmed/negated (erosion present/absent)d. 83 affirmation/negation rules5 NLP trainingDesign & revise NLP model until accuracy ≥90%6 rounds, 817 snippets (AS 417, RA 200, PsA 200)6 NLP testingTest NLP model200 snippets (AS 100, RA 50, PsA 50)7 Pt classificationa. Develop rules for classifying pts with discordant snippetsa. 5 rules developed in 368 ptsb. Build reference sample (pts classified as erosive or non-erosive via chart review)b. 30 IA pts (10 AS, 10 RA, 10 PsA)8 NLP validationValidate NLP model in reference sample at snippet level149 snippets (29 AS, 76 RA, 44 PsA)9 Method validationValidate methods (NLP+pt classification) at pt level30 IA pts (reference sample)pt= patient. ^Snippets include text containing 30 words before & after meaningful termsResults:In 168,667 veterans with IA, the mean age was 63.1 & 90.3% were male. Method development involved radiology note & erosion term selection, rule development, NLP model building, & method validation. The NLP model accuracy was 94.6% at the snippet level & 90.0% at the patient level, for all IA patients.Accuracy of methods.Conclusion:The methods accurately identify erosions from radiology reports of veterans with IA. They may facilitate a broad range of research involving cohort identification & disease severity stratificationReferences:[1]Walsh JA, et al. J Rheumatol. 2020;47(1):42-49Disclosure of Interests:Gopi Penmetsa: None declared, Shaobo Pei: None declared, Brian Sauer Grant/research support from: I have been an investigator on research contracts supported by Abbvie., Jessica A. Walsh Consultant of: AbbVie, Amgen, Janssen, Lilly, Novartis, Pfizer, UCB, Grant/research support from: AbbVie, Merck, Pfizer, Bingjian Feng Grant/research support from: Bing-Jian Feng reports funding and sponsorship to his institution on his behalf from Pfizer Inc., Regeneron Genetics Center LLC, and Astra Zeneca (UK). The PERCH software, for which Bing-Jian Feng is the inventor, has been non-exclusively licensed to Ambry Genetics for clinical genetic testing services and research., Jodi Walker Shareholder of: Abbvie and mutual funds containing various pharmaceutical companies, Employee of: Abbvie, Kevin Douglas Shareholder of: employed by Abbvie, Employee of: employed by Abbvie, Jerry Clewell Shareholder of: Own Abbvie Shares and mutual funds that hold pharmaceutical and other health care stocks, Employee of: I am current Abbvie Inc employee and past employee of Eli Lilly co
APA, Harvard, Vancouver, ISO, and other styles
6

Kovalenko, P. S., I. S. Dydykina, A. V. Smirnov, and E. L. Nasonov. "Changes in erosion count scores during denosumab therapy in patients with rheumatoid arthritis." Medical alphabet, no. 31 (January 13, 2024): 39–42. http://dx.doi.org/10.33667/2078-5631-2023-31-39-42.

Full text
Abstract:
Background. Rheumatoid factor (RF) and antibodies to cyclic citrullinated peptide (ACCP) are associated with the progression of joint erosions in RA. Currently, the efficacy of anti-osteoporotic therapy for the prevention of erosive arthritis is discussing.The aim of the study. To evaluate the effect of denosumab on the erosion score progression in patients with RA and OP, taking into account the activity of the disease and RF or ACCP positivity.Materials and methods. The study included 66 postmenopausal women with determined diagnosis of RA and OP. Non-erosive arthritis was in 23 (35 %) patients, erosive – in 21 (32 %), ankylosis of the joints was diagnosed in 22 (33 %) people. RF (+) was detected in 47 (72 %) people, ACCP (+) – in 48 (74 %) people. Denosumab 60 mg was injected subcutaneously once every 6 months (two injections). The duration of follow-up was 12 months. RA activity was assessed by the DAS 28 index. The erosion was calculated according to the Sharp / van der Heijde (SVH) method.Results. RA patients were divided into four groups: RF (+) and RF (–), ACCP (+) and ACCP (–), comparable in basic clinical features. At the same time, in the RF (+) group, the duration of RA, the frequency of ankylosis of the joints and the erosion count were initially higher compared to the RF (–). After 12 months of therapy, 7 (14.9 %) patients in the RF (+) group and 8 (16.7 %) patients in the ACCP (+) group the number of erosions has increased. There was no increase in the number of erosions in the RF (–) and ACCP (–) groups. In the analyzed groups, there were no changes in the erosion count depending on RA activity.Conclusions. An increase in the erosion score was found in the RF (+) and ACCP (+) groups despite the treatment with denosumab. In the RF (–) and ACCP (–) groups this indicator did not change. The inclusion of denosumab in the complex therapy of RA and OP is reasonable for prevention of OP and erosions progression in women with seronegative RA.
APA, Harvard, Vancouver, ISO, and other styles
7

Levy, C., M. Perl, and Q. Ma. "The Influence of Multiple Axial Erosions on a Three-Dimensional Crack in Determining the Fatigue Life of Autofrettaged Pressurized Cylinders." Journal of Pressure Vessel Technology 124, no. 1 (May 22, 2001): 1–6. http://dx.doi.org/10.1115/1.1386656.

Full text
Abstract:
Erosion geometry effects on the mode I stress intensity factor (SIF) for a crack emanating from an erosion’s deepest point in a multiply eroded, autofrettaged, pressurized, thick-walled cylinder are investigated. The problem is solved via the finite element method (FEM). Autofrettage, based on von Mises yield criterion, is simulated by thermal loading and SIFs are determined by the nodal displacement method. SIFs are evaluated for a variety of relative crack depths, a0/t=0.01-0.40, and crack ellipticities, a0/c=0.5-1.5, emanating from the tip of erosions of different geometry, namely: (a) semi-circular erosions of relative depths of 1–10 percent of the cylinder’s wall thickness, t; (b) arc erosions for several dimensionless radii of curvature, r′/t=0.05-0.4; and (c) semi-elliptical erosions with ellipticities of d/h=0.3-2.0. The erosion separation angle, α, is taken from 7 to 360 deg. Deep cracks are found to be almost unaffected by the erosion. The effective SIF for relatively short cracks is enhanced by the presence, separation distance and geometry of the erosion, as well as the crack geometry, and may result in a significant decrease in the vessel’s fatigue life of up to an order of magnitude.
APA, Harvard, Vancouver, ISO, and other styles
8

Jablonski-Momeni, Anahita, Franka Hanselmann, Peter Bottenberg, and Heike Korbmacher-Steiner. "Detection of Erosive Changes on Smooth Surfaces with and without Orthodontic Brackets Using an Intraoral Scanner—An In Vitro Study." Diagnostics 13, no. 20 (October 17, 2023): 3232. http://dx.doi.org/10.3390/diagnostics13203232.

Full text
Abstract:
Background: Consumption of acidic beverages favours development of erosions. Modern diagnostic methods are required to detect erosions at an early stage. This study aimed to evaluate the suitability of an intraoral scanner (IOS) for detection of erosive changes on smooth surfaces adjacent to orthodontic brackets. Methods: Orthodontic metal brackets were attached to the buccal surfaces of 58 extracted permanent human teeth. Teeth were randomly divided into groups: A = 6% citric acid, B = Coca-Cola, C = Redbull, D = Powerade, E = Control, no acid exposure. Teeth were exposed to acid in three erosion cycles, followed by rinsing and brushing. Scans of teeth were performed at baseline and after each erosion cycle and enamel loss was measured. Quantitative light-induced fluorescence (QLF) measurements were performed as reference standard. Results: Significant substance loss was measured in all acid groups after the second and third erosion cycle (p < 0.0001). Correlation between scans and QLF were significant (p = 0.001). Conclusions: With IOS, it was possible to detect and quantify enamel erosion at smooth surfaces with and without orthodontic brackets after a short exposure time. Considering the limitations of in vitro results, the use of IOS can be a promising digital tool to detect and monitor erosive enamel changes during fixed orthodontic treatment.
APA, Harvard, Vancouver, ISO, and other styles
9

Levy, C., M. Perl, and H. Fang. "Cracks Emanating From an Erosion in a Pressurized Autofrettaged Thick-Walled Cylinder—Part I: Semi-Circular and Arc Erosions." Journal of Pressure Vessel Technology 120, no. 4 (November 1, 1998): 349–53. http://dx.doi.org/10.1115/1.2842342.

Full text
Abstract:
Erosion geometry effects on the mode I stress intensity factor (SIF) for a crack emanating from the erosion’s deepest point in an autofrettaged, pressurized, thick-walled cylinder are investigated. The problem is solved via the FEM method and knowledge of the asymptotic behavior of short cracks. Autofrettage, based on von Mises yield criterion, is simulated by thermal loading and SIFs are determined by the nodal displacement method. SIFs are evaluated for a variety of relative crack lengths, a0/W = 0.01 – 0.45, emanating from the tip of erosions of different geometries. In Part I of this paper, two configurations are considered: (a) semi-circular erosions of relative depths of 5 percent of the cylinder’s wall thickness, W; and (b) arc erosions for several dimensionless radii of curvature, r′/W = 0.05 – 0.4. While deep cracks are almost unaffected by the erosion, the effective SIF for relatively short cracks is found to be significantly enhanced by the presence and geometry of the erosion and might reduce the vessel’s fatigue life.
APA, Harvard, Vancouver, ISO, and other styles
10

Moret, Margaux, Caroline Morizot, Marcelo de Carvalho Bittencourt, Edem Allado, Isabelle Chary-Valckenaere, and Damien Loeuille. "A Clinical Evaluation of the Role of Autoimmunity in the Relation Between Erosions and Bone Mineral Density in Rheumatoid Arthritis." Biomedicines 12, no. 10 (October 17, 2024): 2376. http://dx.doi.org/10.3390/biomedicines12102376.

Full text
Abstract:
Background/objectives: Both erosions and osteoporosis in rheumatoid arthritis (RA) have common mechanisms. The aim of this study was to evaluate the relationship between erosion and bone mineral density (BMD) in RA and whether it can be driven by autoimmunity. Methods: Patients fulfilling the ACR 1987- or ACR/EULAR 2010-criteriae for RA. performed radiographs (erosions evaluated by the modified Sharp/van der Heidje erosion score) and biology for anti-citrullinated peptide antibodies (ACPAs), rheumatoid factors (RFs) and anti-nuclear antibodies (ANAs) at intervals of less than 2 years from dual-energy X-ray absorptiometry (DXA) for BMD assessment. Results: A total of 149 patients were included, (75.8% women, mean age of 62 y.o (SD 9.61) and a median disease duration of 132 months [60; 240]). A total of 61.1% patients were ACPA positive, 79.9% were erosive and 10.7% had a hip or spine T-score ≤ −2.5. A higher erosion score was associated with a lower BMD (value: −0.222; p = 0.009) and T-score (value −0.397; p < 0.0001) in the hip. ACPA status was associated with a higher erosion score (63.0 (53.2) vs. 45.5 (44.1) for ACPA- (p = 0.04)). ACPA titers were associated with a lower BMD in the hip (value −0.216; p = 0.01). In linear regression, erosion and BMD were still associated, but this association is not driven by ACPA status or titer. Conclusions: In RA patients, erosions and BMD are inversely associated but this relationship does not seem to be driven by autoimmunity only. However, the presence of ACPA or erosion should lead to osteoporosis screening.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Dissertations / Theses on the topic "Erosion"

1

Åsen, Kristina, and Anna Boking. "Dental erosion : kolsyrade vattens erosiva potential." Thesis, Kristianstad University College, School of Health and Society, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hkr:diva-5272.

Full text
Abstract:

Syftet med studien var att undersöka den erosiva potentialen av vanligt förekommande kolsyrade vatten med eller utan smaksättning. Studien genomfördes som en laboratoriestudie vid Institutionen för Odontologi vid Göteborgs universitet. Totalt omfattades studien av 34 buteljerade kolsyrade vatten med eller utan smak, tre kolsyrade vatten producerade i kolsyreapparat samt sex referensdrycker. Samtliga produkter testades genom registrering av initialt pH med pH-elektrod och buffring med 0,1 M NaOH till det värde då pH neutraliserats. Dryckens surhetsgrad beräknades därefter vilket anses som ett mått på dess erosiva potential. Resultatet visade att majoriteten av kolsyrade vatten hade ett initialt pH-värde >5 men variationer fanns mellan varumärken. Samtliga studerade vatten uppvisade en lägre erosiv potential jämfört med referensdrycker som färskpressad citron- och apelsinjuice, men inte jämfört med läskedrycker. Data visade att syrakoncentrationen steg när mängden kolsyra ökade. Olika smaktillsatser hade endast en mindre påverkan på den erosiva potentialen. Denna studie visade att kolsyremängden var av större betydelse än smaktillsats för syrakoncentrationen i vattnet.


The aim of this study was to investigate the erosive potential of the most commonly used carbonated waters with or without flavouring. The study was preformed as an in vitro study at the Institution of Odontology at University of Gothenburg. The study was comprised by 34 bottled carbonated waters with or without flavouring, three carbonated waters produced in a carbonator machine and six control drinks. Products were tested and pH was measured using a pH electrode and buffered gradually with 0,1 M NaOH until pH reached neutral value. Calculation of the acidity of the drinks, which is a grade on its erosive potential, was measured. The results showed that a majority of the studied carbonated waters had a pH baseline value >5, but variations existed among the different labels. All of the studied waters showed a lower erosive potential compared with the control products freshly squeezed lemon- and orangejuice, but compared to soft drinks. Data showed that the acid concentration gradually arouse when carbondioxide was added to the water. Different flavouring had only a slight influence on the erosive potential. This study showed that adding carbondioxide was of larger importance than adding flavouring for the acid concentration in the water.

APA, Harvard, Vancouver, ISO, and other styles
2

Giovanini, Junior Nelson. "Análise e aplicação de metodologias de predição de processos erosivos utilizando SIG na Bacia Hidrográfica do Córrego do Engano, Nova Canaã Paulista - SP /." Ilha Solteira, 2019. http://hdl.handle.net/11449/181272.

Full text
Abstract:
Orientador: César Gustavo da Rocha Lima
Resumo: A bacia hidrográfica é uma unidade geomorfológica que agrega os impactos das interferências antrópicas e naturais sobre os recursos hídricos. Mudanças significativas nas características de uma bacia, causadas por processos naturais ou atividades antrópicas, podem gerar alterações, efeitos e impactos na estabilidade biótica e abiótica do sistema, desencadeando desequilíbrios ambientais e, portanto, a degradação da paisagem. Dentre os processos causadores dessa degradação, destaca-se a erosão dos solos. A erosão é um processo geológico responsável pela remoção e pelo transporte de partículas do solo, principalmente pela ação da água das chuvas sendo um importante agente na modelagem da paisagem terrestre e na redistribuição de energia no interior da bacia hidrográfica. Neste trabalho será analisada a relação entre algumas metodologias – e suas modificações - de predição de ocorrência de processos erosivos na Bacia Hidrográfica do Córrego do Engano utilizando um ambiente de Sistemas de Informações Geográficas. Foram aplicados três diferentes métodos: Vulnerabilidade Natural à Erosão (VNE), Equação Universal de Perda de Solos (USLE) e processo de análise hierárquica (AHP). Para a aplicação dos três métodos foi utilizado um Sistema de Informação Geográfica com a criação de um banco de dados com diversas informações necessárias para a aplicação dos métodos, como: mapa de precipitação, erosividade, tipos de solo, erodibilidade, tipos de rochas, fatores topográficos e uso e ocupação.... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The drainage basin is a geomorphological unit that aggregates the protection of anthropic and natural interferences on water resources. Changes in the characteristics of a basin, caused by natural processes or anthropic activities, can generate changes, effects and stability in the biology and in the abiotic system, triggering environmental imbalances and, therefore, a degradation of the landscape. Among the processes that causes this degradation, there is soil erosion. Erosion is a geological process responsible for the removal and transport of soil particles, mainly by the action of rainwater, being an important agent in the modeling of the terrestrial landscape and in the redistribution of energy within a drainage basin. This work will analyze the relationship between some methodologies - and their modifications - of predicting the occurrence of erosive processes in the Corrego do Engano drainage basin using a Geographic Information Systems environment. Three different methods were applied: Natural Erosion Vulnerability (VNE), Universal Soil Loss Equation (USLE) and hierarchical analysis process (AHP). For the application of the three methods was used a Geographic Information System with the creation of a database with several information needed to work with these methods, such as: precipitation map, erosivity, soil types, erodibility, types of rocks, factors topography and land use. For each methodology was determined the probability of occurrence of erosive processes bas... (Complete abstract click electronic access below)
Mestre
APA, Harvard, Vancouver, ISO, and other styles
3

Hamlin, Lauren Kearns. "Erosion." The University of Montana, 2009. http://etd.lib.umt.edu/theses/available/etd-05282009-130629/.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Lönnborg, Pernilla. "Erosion." Thesis, KTH, Arkitektur, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-168677.

Full text
Abstract:
Byggnader är under ständig förändring. Den omkringliggande miljön orsakar en nedbrytning i form av vittring. Material som bryts ner. Vi vet att en byggnad inte kommer att finns för alltid så vad händer om vi låter nedbrytningen vara en tillgång. Naturens processer ger oss perspektiv på tid. Årstider som följer varandra. Berg som eroderar och formeras. Hur kan man förstärka upplevelsen av tid och rum genom en byggnad som tillåts interagera med den omkringliggande miljön och vara under ständig förändring?
Buildings are constantly changing. The surrounding environment partly causes a breakdown through weathering. Materials that breaks down. We know that a building won’t stand forever so what happens if we turn the decomposition to an asset? The process of nature gives us perspective of time. Seasons that follows each other. Rocks that erodes and forms. How can we enhance the experience of time through a building that allows integrating with the surrounding environment and being in constant change?
APA, Harvard, Vancouver, ISO, and other styles
5

Slotte, Mikael. "Erosion." Thesis, KTH, Arkitektur, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-146183.

Full text
Abstract:
Rosenlunds sandbankar är ett naturskyddsområde mellan Jönköping och Huskvarna som rasar med ungefär 30 cm per år. Platsen tillåts att årligen krympa men inte att användas. Det görs inga större ansatser för att dokumentera den för framtida generationer eller synliggöra den för nu levande generationer. I detta examensarbete undersöks ett naturligt fenomen som kommer att påverka civilisationer i tusentals år. Examensarbetet syftar i första hand till att återintroducera en bortglömd plats och beskriva hur den förändras i tid och rum. Med hjälp av studier om erosion, landhöjning, istid och med hjälp av fältstudier tolkas platsens förgänglighet i fotografier och i en serie ritningar. Därefter föreslås ett promenadstråk där det direkt går att beskåda de geologiska processer som omformar platsen. Stråket knyts ihop över tre terränger – sandbank, strandkant och sjö. Den enkla konstruktionen består av balkar och trädäck som placeras på träpålar och gabioner. Konstruktionens livstid är i ett idealfall detsamma som platsens – pelare kommer att ruttna, delar av platsen kommer att växa igen och i ett längre tidsperspektiv kommer branten att flackas ut. Under hela konstruktionens livstid kommer den att kunna användas för att tolka de processer som pågår på platsen och spegla platsens unika förgänglighet.
Rosenlunds sandbankar is a nature reserve between Jönköping and Huskvarna eroding about 30 cm per year. It is allowed to annually shrink but not to be used. There are no major attempts to document it for future generations or to make it visible for the present. This thesis examines a natural phenomenon that will affect civilizations for thousands of years. The work is primarily aimed at reintroducing a forgotten site and describe how it changes in time and space. Using studies of erosion, land uplift, ice age and with the help of field studies the site's transformation is interpreted in photographs and a series of drawings. I propose a promenade where the geological processes that transform the site can be observed and followed. The footpath connects three terrains - sand bluff, shore and lake. The structure consists of beams and decking placed on wooden piles and gabions. In an ideal case it will exist as long as the site itself. Pillars will rot, parts of the site will be overgrown, and in the longer term, the slope will flatten out. During its life span, the structure can be used to interpret the processes and reflect the site's unique transience.
APA, Harvard, Vancouver, ISO, and other styles
6

Dotson, Matthew. "Erosion." Diss., University of Iowa, 2010. https://ir.uiowa.edu/etd/490.

Full text
Abstract:
In my work I am often drawn to relatively simple systems that unfold before the listener. In Erosion, there are several of these processes which unfold simultaneously. The piece begins with a pitch cluster that gradually spreads into total chromatic saturation (about half-way through the piece) before shrinking back into clusters. As this is happening there is, on a macro level, a gradual speeding of events throughout the entire duration of the work. The interactions between this linear progression in the time domain and the (relatively) cyclical progression in the frequency domain form the main dialogue of the work.
APA, Harvard, Vancouver, ISO, and other styles
7

Garcia-Chevesich, Pablo Andres. "Erosion Processes and Control." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/195844.

Full text
Abstract:
This dissertation represents a unique contribution to the Spanish literature of soil erosion. The author of this document has written and published "Procesos y control de la erosion", a textbook about the engineering of soil erosion processes and the design of the most up-to-date methods and products used for erosion control. The text has been presented in Appendix A.Besides the above, the author of this dissertation is an active committee member at the International Erosion Control Association (IECA), specifically the International Development and the SOIL Fund programs. IECA members are drawn from individuals and erosion control business of different sizes. However, there was a lack of knowledge within IECA members about the formation of post-fire water repellent layers. For instance, Appendix B is represented by an article written by the author of this document, published in Environmental Connection (Volume 2, Issue 3), on July of 2008. The article gives a general description of what post-fire water repellency is, how is it formed, what factors affect it, its consequences on soil erosion, and how to control soil erosion on an efficient way when such a layer has been formed as a consequence of fire.Finally, Appendix C is a research paper in process of submission to the International Journal of Wildland Fire, about the formation of post-fire water repellent layers on Chilean Monterrey pine plantations. Since water repellent layers following wildfires have never been documented on Chilean soils, the need for such a publication is urgent, because Chilean land managers have been ignorant of such phenomenon.
APA, Harvard, Vancouver, ISO, and other styles
8

Cruz, Carla da [UNESP]. "Análise comparativa da evolução das boçorocas nos anos de 1962 e 1999 nos municípios de Pompéia e Oriente SP." Universidade Estadual Paulista (UNESP), 2003. http://hdl.handle.net/11449/92940.

Full text
Abstract:
Made available in DSpace on 2014-06-11T19:26:15Z (GMT). No. of bitstreams: 0 Previous issue date: 2003-01-13Bitstream added on 2014-06-13T18:54:25Z : No. of bitstreams: 1 cruz_c_me_rcla.pdf: 5048620 bytes, checksum: c2c3ba7c2e63bbfe95d39f75f71b9604 (MD5)
Realizou-se neste trabalho a análise comparativa entre boçorocas existentes no ano de 1962 com as do ano de 1999, enfocando sua evolução, estabilização e reutilização nos municípios de Pompéia e Oriente, localizados no Planalto Ocidental Paulista, Esta análise constituiu-se de fotointerpretação de fotografias aéreas da área de estudo, na escala 1:25. 000, e trabalhos de campo que incluíram o cadastramento e mensuração das boçorocas do primeiro período, e suas alterações recentes ao longo destes anos, bem como novas boçorocas na mesma área para efeitos de comparação e atualização. Os municípios estudados, ficam entre as cidades de Tupã e Marília, área de aproximadamente 20 km , constituída geologicamente pelas Formações Marília e Adamantina pertencentes ao Grupo Bauru e geomorfologicamente pelos Planaltos Residual de Marília e Centro Ocidental. A metodologia aplicada neste caso constou de levantamento geológico expedito, análise pedológica parcial e delimitação da compartimentação geomorfológica. Estes elementos foram analisados a luz das atuais condições climáticas, da atual vegetação e do recente uso e ocupação do solo e suas implicações com as boçorocas anteriores e as atuais. Esta análise implicou na proposta de estabelecer a interação entre as características naturais associadas às atividades antrópicas e ao processo erosivo implantado na área em questão. Obteve-se com a comparação dos resultados à influência conjunta dos fatores citados na ocorrência de erosões e na permanência do processo erosivo nos municípios estudados, verificando-se modificações nas boçorocas de 1962, tendo sido utilizados meios de contenção e de reutilização dessas feições erosivas. Em outros casos, as boçorocas apresentaram quadro de estabilização natural. Demonstrou-se com os dados obtidos que a mudança...
APA, Harvard, Vancouver, ISO, and other styles
9

Oliveira, Rodolfo Lopes de Souza. "Análise e caracterização da dinâmica geomórfica erosiva da área urbana de Alfenas, sul de Minas Gerais." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/8/8135/tde-13052015-112055/.

Full text
Abstract:
Os processos relativos à urbanização promovem alterações nas dinâmicas naturais, inclusive, sobre o relevo. Assim, a Geomorfologia apresenta-se como uma área de conhecimento importante para orientar a ocupação, estudando a evolução das formas e como estas passam a ser definidas na paisagem. Por essa premissa, este trabalho objetiva analisar o grau de suscetibilidade dos materiais superficiais e da morfologia do relevo da área urbana de Alfenas MG a processos erosivos, justificando-se pela sua proposta de direcionamento para entender as respostas e as reações do relevo e do uso do solo às precipitações, ao comportamento da hidrologia (superficial e subsuperficial) e às interferências antrópicas, tendo por base informações detalhadas sobre esses elementos, pois há modificações nos fluxos de matéria e de energia operantes. Isso ajuda a explicar as ocorrências de processos erosivos da área, além de prever estados da morfologia onde estão operando esses processos ou seja, até mesmo para compreender a antropogeomorfologia da área. A área de estudo corresponde à sede do município de Alfenas, localizada entre as coordenadas de 21º15 e 21º35 de latitude S e 46º00 e 46º50 de longitude W, incluída na carta topográfica de Alfenas, na escala 1:50.000. Foram utilizados materiais como a Planta Cadastral de Alfenas e fotografias aéreas na escala de 1:6.000, além de sistemas de informações geográficas e mapeamentos de detalhe para as análises, bem como ensaios de campo e de laboratório. Com a análise de dados morfométricos e da mecânica dos materiais superficiais, foi possível identificar e caracterizar os processos erosivos observados nos compartimentos de relevo definidos. Constatou-se que a ocupação antrópica alterou as formas e tem, de fato, contribuído para a deflagração de erosão acelerada.
Urbanization causes changes in natural dynamics, including relief. On this way, Geomorphology represents an important scientific area that helps to guide occupancy actions, due to morphology evolutions studies and how forms are defined in landscape. Starting by this point, this work aims to analyze the level of susceptibility of surface materials and morphology of urban area of Alfenas, Minas Gerais, Brazil, to erosion. This is justified by a proposed guidance to understand the responses and the reactions of relief to land use, climate precipitation, hidrology (superficial and subsuperficial) and antropic processes, based on detailed information about these elements, because there are changes in flows of matter and energy operant. All of this helps to explain the occurrence of erosion in the area, besides to preview morphology states where erosional processes are occurring ie, even to understand the antropomorphology of area. The study area is the city of Alfenas, Minas Gerais, Brazil, located between coordinates 21º15 and 21º 35 of latitude S and 46º00 and 46º50 of longitude W, included in topographic map of Alfenas (scale 1:50.000). Materials such the Cadastral Plant of Alfenas and aereal photographs (scale 1:6.000), as well geographic information systems, detail mapping and geotechnic essays were used for analysis. The obtained morphometric and surface materials mechanics data were fundamental to identify and to characterize erosional processes observed on the defined forms. It was found that human occupation has altered the forms and has contributed to the outbreak of accelerated erosion.
APA, Harvard, Vancouver, ISO, and other styles
10

Schmidt, Walter, and Marcus Schindewolf. "Erosion 3D Sachsen." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2010. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-38172.

Full text
Abstract:
Für die Erstellung von Bewirtschaftungs- und Maßnahmenplänen (FFH, EU-WRRL) ist es erforderlich, den bislang noch sehr hohen Aufwand für die Datenbeschaffung und -generierung im Rahmen der Modellierung mit EROSION 3D zu senken. Erreicht werden soll eine schnellere sowie effizientere Abschätzung von Landnutzungsänderungen, Landschaftseingriffen, des Klimawandels usw. auf Oberflächenabfluss, Bodenabtrag sowie Sedimenteintrag in Gewässer mit EROSION 3D. Im vorliegenden Projekt ist es gelungen, Parametrisierung und Modellanwendung so zu kombinieren, dass eine Bodenabtragssimulation mit dem Modell EROSION 3D flächendeckend für Sachsen mit vertretbarem Zeitaufwand durchführbar ist. Der korrigierte und angepasste Geo-Basisdatensatz liefert die Primärinformationen zur Datenbankabfrage der Parametrisierungssoftware DPROC. Durch eine interaktive Flächenauswahl, kombiniert mit einem Flächendatenzuschnitt, können Landnutzungs- und Bearbeitungsszenarien für hydrologische Einzugsgebiete oder Oberflächenwasserkörper schnell parametrisiert werden. Die grundlegend korrigierte und erweiterte Datenbank des DPROC erlaubt die verbesserte Abschätzung erosionsrelevanter Bodenparameter, besonders für die dauerhaft konservierende Bodenbearbeitung und die Direktsaat. Die umfangreiche Dokumentation der Arbeitsschritte und die Transparenz der Datenbank ermöglichen es, jederzeit Aktualisierungen (Geo-Basisdaten) und Erweiterungen (DPROC-Datenbank) vorzunehmen. Von den Projektergebnissen profitieren vor allem die Anwender des Programms EROSION 3D. Beim Druck des Dokumentes ist zu beachten, dass die Karten im Format DIN A3 erstellt wurden.
APA, Harvard, Vancouver, ISO, and other styles
More sources

Books on the topic "Erosion"

1

Montalais, Jacques de. Erosion. Paris: Le Pont de l'Epee, 1985.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
2

Riley, Joelle. Erosion. Minneapolis: Lerner Publications Co., 2007.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
3

Zappa, Marcia. Erosion. Edina, Minn: ABDO Pub. Co., 2011.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
4

Pelleschi, Andrea. Erosion. Boston, MA: Houghton Mifflin, 2005.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
5

Zaro, Mariano. Poems of erosion: Poemas de la erosión. San Francisco, CA: Carayan Press, 2003.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
6

Charlier, Roger H., and Christian P. De Meyer. Coastal Erosion. Berlin, Heidelberg: Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/bfb0011384.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Schmidt, Jürgen, ed. Soil Erosion. Berlin, Heidelberg: Springer Berlin Heidelberg, 2000. http://dx.doi.org/10.1007/978-3-662-04295-3.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Xu, Xiangzhou, Tongxin Zhu, Hongwu Zhang, and Lu Gao. Experimental Erosion. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-3801-8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Branch, Alberta Alberta Agriculture Conservation and Development. Water erosion. Edmonton, Alta: Alberta Agriculture, Conservation and Development Branch, 1990.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
10

1932-, Burnham C. P., Pitman J. I, and South East England Soils Discussion Group., eds. Soil erosion. London: South East England Soils Discussion Group, 1987.

Find full text
APA, Harvard, Vancouver, ISO, and other styles
More sources

Book chapters on the topic "Erosion"

1

Roth, Lawrence O., and Harry L. Field. "Erosion and Erosion Control." In An Introduction to Agricultural Engineering: A Problem-Solving Approach, 218–25. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4684-1425-7_18.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Roth, Lawrence O., and Harry L. Field. "Erosion and Erosion Control." In Introduction to Agricultural Engineering, 218–25. Boston, MA: Springer US, 1992. http://dx.doi.org/10.1007/978-1-4615-3594-2_18.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Field, Harry L., and John M. Long. "Erosion and Erosion Control." In Introduction to Agricultural Engineering Technology, 279–88. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-69679-9_18.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Zorn, Matija, and Blaž Komac. "Erosion." In Encyclopedia of Natural Hazards, 288–89. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-1-4020-4399-4_120.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Jahren, Per, and Tongbo Sui. "Erosion." In How Water Influences Our Lives, 161–78. Singapore: Springer Singapore, 2016. http://dx.doi.org/10.1007/978-981-10-1938-8_8.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Brady, Roland H. "Erosion." In Encyclopedia of Earth Sciences Series, 1–6. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-12127-7_114-1.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Weik, Martin H. "erosion." In Computer Science and Communications Dictionary, 536. Boston, MA: Springer US, 2000. http://dx.doi.org/10.1007/1-4020-0613-6_6393.

Full text
APA, Harvard, Vancouver, ISO, and other styles
8

Schuurs, Albert. "Erosion." In Pathology of the Hard Dental Tissues, 156–72. West Sussex, UK: John Wiley & Sons, Ltd,., 2013. http://dx.doi.org/10.1002/9781118702659.ch6.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Storey, P. J. "Erosion." In Conservation and Improvement of Sloping Lands, Vol. 1, 95–106. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003579243-7.

Full text
APA, Harvard, Vancouver, ISO, and other styles
10

Gooch, Jan W. "Erosion." In Encyclopedic Dictionary of Polymers, 273. New York, NY: Springer New York, 2011. http://dx.doi.org/10.1007/978-1-4419-6247-8_4496.

Full text
APA, Harvard, Vancouver, ISO, and other styles

Conference papers on the topic "Erosion"

1

Corey, Robert G., and Vijay K. Sethi. "Erosion-Corrosion Synergistics in the Low Erosion Regime." In CORROSION 1986, 1–11. NACE International, 1986. https://doi.org/10.5006/c1986-86114.

Full text
Abstract:
Abstract Many engineering alloys display good high temperature corrosion resistance. However, when they are used in corrosive environments where they are subjected to erosion also, the corrosion resistance has been adversely affected. The phenomenon known as erosion-corrosion is complex and requires detailed investigation of how the erosion and corrosion kinetics interact and compete. At the Kentucky Center for Energy Research Laboratory, an erosion-corrosion tester was constructed. The tester was used to perform some preliminary erosion-oxidation tests on 2 1/4 Cr-1 Mo steel at the 500-600° C temperature range using alumina abrasive at low velocities. In the erosion and oxidation conditions imposed on the alloy, the erosion-oxidation rate data and the morphology of the exposed surfaces are consistent with oxide chipping and fracturing being the mode of material loss.
APA, Harvard, Vancouver, ISO, and other styles
2

McLaury, B. S., S. A. Shirazi, J. R. Shadley, and E. F. Rybicki. "Parameters Affecting Flow Accelerated Erosion and Erosion-Corrosion." In CORROSION 1995, 1–13. NACE International, 1995. https://doi.org/10.5006/c1995-95120.

Full text
Abstract:
Abstract Sand erosion can remove protective corrosion scales on pipe walls and cause severe erosion-corrosion damage. Many factors influence erosion-corrosion. The goal of this work is to obtain an understanding of how these factors work together to cause severe erosion-corrosion damage. To reach this goal, a combination of erosion testing and flow modeling, including sand erosion, is used. This approach includes the effects of pipe geometry, size, and pipe wall material; flow velocity, fluid density and viscosity; sand size, shape, density, and sand production rate on the loss of wall thickness due to sand erosion and erosion-corrosion. Progress has been made to the extent that a procedure for prediction erosion penetration rate is presented. The procedure is a generalization of several earlier empirical methods for specific sand erosion conditions reported in the literature. Results from the erosion prediction model are compared to experimental data presented in the literature.
APA, Harvard, Vancouver, ISO, and other styles
3

Solomon, N. G. "Erosion Resistant Coatings for Fluidized Bed Boilers." In CORROSION 1997, 1–10. NACE International, 1997. https://doi.org/10.5006/c1997-97135.

Full text
Abstract:
Abstract Erosion is a generic problem in fluidized bed boilers. This paper identifies the erosion-prone areas in circulating and bubbling bed fluidized bed boilers, and the currently used methods for erosion protection. Recent experience with thermal spray coatings in these areas is discussed as are the complications presented by burning fuels that introduce corrosion to the already erosive environment. The paper concludes with some comments on future considerations for the protection of fluidized bed pressure parts from general wastage due to erosion and corrosion.
APA, Harvard, Vancouver, ISO, and other styles
4

Addis, J., B. Brown, and S. Nesic. "Erosion-Corrosion in Disturbed Liquid/Particle Flow." In CORROSION 2008, 1–14. NACE International, 2008. https://doi.org/10.5006/c2008-08572.

Full text
Abstract:
Abstract Erosion-corrosion occurs in pipelines that transport both corrosive liquids and erosive solid particles. This study has tested the erosion-corrosion behavior of mild carbon steel under conditions where there is no protective iron carbonate film. High and low NaCl concentrations were studied in order to determine the effect of salt concentration on the erosion-corrosion process as well as the individual pure corrosion and pure erosion processes. The effect of erosion-corrosion on mild steel was tested under disturbed flow by using a specially designed test section consisting of three flow alterations: a flow constriction, protrusion, and expansion. Under the tested conditions it was found that there is no synergistic effect between erosion and corrosion and that for an unprotected base metal the rate of metal loss is equal to the sum of erosion loss and corrosion loss. The higher salt concentration led to a lower corrosion rate and erosion rate but did not affect the interaction between erosion and corrosion.
APA, Harvard, Vancouver, ISO, and other styles
5

Pérez-De-Obanos, Mercedes, Soraya Rodríguez, Haydee Contreras, and Ioana C. Grigorescu. "Dry Erosion and Corrosion-Erosion Results for Thermoplastics and Metallic Alloys." In CORROSION 2000, 1–25. NACE International, 2000. https://doi.org/10.5006/c2000-00559.

Full text
Abstract:
Abstract A high damage rate was found on the inner surface of a Phosphoric Acid Evaporator Chamber. A substitution of the original poly-isoprene or natural rubber (NR) liner was proposed. Lack of wet erosion comparative data, demanded to perform laboratory erosion-corrosion tests on possible substitutes: fluorinated ethylene-propylene copolymer (FEP); polyvinylidene fluoride (PVDF); ethylene-tetrafluorethylene copolymer (ETFE); and superalloy UNS N08700 (wt. %: 24Ni, 20Cr, 4.5Mo; 1.5Cu, Fe bal.) Non-standardized tests were performed using a stirring system with four flat samples as blades, which rotated in a mixture of H3PO4, with 20 wt. % SiC grits. The temperature was kept at 70°C. The rotating speed was held at 1800 r.p.m. The duration of the test was 1100 hours. Dry erosion tests were also carried out to compare results. They were done according to ASTM C 704 specification. The abrasive particles used were SiC grits. The incidence angles were 30° and 45°. The test was set up according to the ASTM C 704 specification. The weight and volume loss was measured for all samples (wet and dry tests), and the surface morphology of the damaged areas was observed by scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and laser profilometry technique. Results showed that, although there were differences, all material tested could be used, so an economic analysis was made. This showed that all fluoropolymers tested, when used as liner in a dualaminate vessel (fluoropolymer liner in a fiberglass reinforced plastic, FRP, structure) were considerably more economical
APA, Harvard, Vancouver, ISO, and other styles
6

Vera, Jose, Francois Ayello, Guanlan Liu, Richard Eckert, and Prabhas Bhat. "Guideline to Determine Erosional Velocity for Liquid Hydrocarbon Transmission Pipelines." In CONFERENCE 2022, 1–15. AMPP, 2022. https://doi.org/10.5006/c2022-17812.

Full text
Abstract:
Abstract Erosion can be a major threat to liquid hydrocarbon transmission pipeline integrity if high liquid flow rates are combined with the presence of solid particles. Erosion may cause metal loss to the pipeline and in extreme cases lead to pipeline failure. There is currently no industry-recognized guidance document or standard for determining erosional velocity limits for liquid hydrocarbon transmission pipelines. Many operators use the general form of the American Petroleum Institute RP 14E equation to determine erosional velocity, but it does not properly address the effect of the key parameters affecting erosion in liquid pipelines and could give erroneous results in some cases. This paper presents a guideline to determine erosional velocity limits for liquid hydrocarbon transmission pipelines, developed based on a multi-analytical probabilistic approach that integrated results from two industry-recognized erosion prediction models. The guidance developed allows pipeline operators to reduce capital costs when designing new pipelines or can provide engineering justification for increasing the throughput of existing facilities while maintaining pipeline integrity relative to the threat of erosion.
APA, Harvard, Vancouver, ISO, and other styles
7

Nassef, Anass S., Michael W. Keller, and Siamack A. Shirazi. "Erosion/Corrosion of Duplex Stainless Steel in Sweet Production with Sand versus CaCO3." In CONFERENCE 2023, 1–10. AMPP, 2023. https://doi.org/10.5006/c2023-19394.

Full text
Abstract:
Abstract Erosion-Corrosion behavior of 2507 duplex stainless steel was studied in a CO2 saturated environment (sweet production) as it was impinged by CaCO3 and sand particles. Experimental data were collected with the objective of investigating the performance of 2507 duplex stainless steel on mitigating CO2 corrosion in erosive environments. Pure erosion, pure corrosion and erosion-corrosion tests were conducted in a flow loop with a direct impingement configuration. Weight loss (WL) and electrochemical linear polarization (LPR) methods were utilized in this study. While WL method was used to measure erosion and total erosion-corrosion, LPR was used to measure pure corrosion and to monitor corrosion part of total erosion-corrosion. The erosivites of particles were characterized at low and high flow velocities. The flowing solution’s pH was monitored and maintained in the range from 4 to 5 throughout corrosion and erosion-corrosion tests. For the experimental conditions considered, pure erosion and erosion-corrosion data showed no synergism between erosion and corrosion.
APA, Harvard, Vancouver, ISO, and other styles
8

Zhang, Yongli, Brenton S. McLaury, Siamack A. Shirazi, and Edmund F. Rybicki. "A Two-Dimensional Mechanistic Model for Sand Erosion Prediction Including Particle Impact Characteristics." In CORROSION 2010, 1–19. NACE International, 2010. https://doi.org/10.5006/c2010-10378.

Full text
Abstract:
Abstract The design of oil and gas production equipment to withstand erosive conditions and optimize the production rate, while keeping the piping system operating safely, requires a reliable erosion prediction tool. It is well known that many factors can affect erosion damage, such as flow geometry, pipe material, carrier fluid properties, flow conditions and flow regime, and particle properties. To predict erosion, a key ingredient is to have properly calculated particle impact parameters, such as impact velocity, impact angle, impact location, and impact frequency. The guideline in API RP 14E1 is not reliable in determining erosional threshold velocity when sand production is expected2, 3. A few models that were previously presented in the literature to calculate solid particle erosion utilize the fluid velocity instead of the actual particle impact velocity. These models account for fluid density, particle diameter, and some common flow geometries, and have been compared with some lab and field data. Their application, however, is limited due to the limited physics behind them. Shirazi et al. presented a mechanistic model accounting for most of the key parameters listed above2. This model predicts erosion rate using the calculated representative particle impact velocity. The drawback of this previous model is that the calculation is based on one-dimensional particle tracking. This limits its application to relatively large sand particles (&gt;50 to 100 microns) or cases where gas is the carrier fluid. After extensive studies utilizing CFD-based erosion modeling, the authors found that both the normal and tangential particle impact velocity components and the turbulence field are essential in erosion calculations for certain cases. A mechanistic model based on two-dimensional particle impact characteristics was developed based on these findings. Comparisons of results from the 2-D mechanistic model and the previous 1-D model together with the CFD-based model, and experimental data are presented in this paper.
APA, Harvard, Vancouver, ISO, and other styles
9

Lockett, T. J., J. Saponja, and D. Queen. "Erosion During Underbalanced Drilling." In CORROSION 2000, 1–9. NACE International, 2000. https://doi.org/10.5006/c2000-00082.

Full text
Abstract:
Abstract This paper illustrates the process of erosion and erosion management during the UnderBalanced Drilling (UBD) of a series of gas wells in the Southern North Sea. In this context, tonnes of solids can be brought to the surface in a short time frame and induce erosion sufficient to threaten plant integrity. Preferred units for erosion are therefore mm/tonne of solids produced rather than the traditional units mm/yr derived from corrosion management. This paper presents: the role of an erosion assessment in advance of drillingthe practical measures put in place to minimise the risk from erosion (likelihood and consequence)examples of the erosion damage that occurred, and discussion of their likely causesteps implemented (and proposed) to reduce and manage erosion in future
APA, Harvard, Vancouver, ISO, and other styles
10

Sani, Fazlollah Madani, Srdjan Nesic, Sytze Huizinga, and Khlefa Esaklul. "Review of the API RP 14E Erosional Velocity Equation: Origin, Applications, Misuses and Limitations." In CORROSION 2019, 1–15. NACE International, 2019. https://doi.org/10.5006/c2019-13206.

Full text
Abstract:
Abstract Oil and gas companies apply different methods to limit erosion-corrosion of mild steel lines and equipment during the production of hydrocarbons from underground reservoirs. One of the frequently used methods is limiting the flow velocity to a so-called “erosional velocity,” under which it is assumed that no erosion-corrosion would occur. Over the last 40 years, the American Petroleum Institute recommended practice 14E (API RP 14E) equation has been used by many operators to estimate the erosional velocity. The API RP 14E equation has become popular because it is simple to apply and requires little in the way of inputs. However, due to its simplicity the API RP 14E equation has been frequently misused through generalizing the observed empirical c-factors to conditions and applications where it was invalid. Even when constrained to its defined conditions and applications, the API RP 14E has some serious limitations; such as not providing any quantitative guidelines for estimating the erosional velocity in the two commonest scenarios in the field, when solid particles are present in the production fluids and when erosion and corrosion are both involved. Field data showed that the API RP 14E equation is inadequate for estimating the erosional velocity and other operating parameters involved in erosion, corrosion and erosion-corrosion such as material properties, flow geometry, flow regime, sand production rate, and concentration of corrosive species; all need to be accounted for in establishing a correct estimation of the erosional velocity.
APA, Harvard, Vancouver, ISO, and other styles

Reports on the topic "Erosion"

1

Lyczkowski, R. W., J. X. Bouillard, S. M. Folga, and S. L. Chang. User`s manual for EROSION/MOD1: A computer program for fluids-solids erosion. Office of Scientific and Technical Information (OSTI), September 1992. http://dx.doi.org/10.2172/10108132.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Inghram, M. G. Erosion along the Kenai River. Alaska Division of Geological & Geophysical Surveys, 1985. http://dx.doi.org/10.14509/1130.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Knight, Lynn, and Suzy Hodgson. Economics of Gully Erosion Stabilization. USDA Northeast Climate Hub, July 2018. http://dx.doi.org/10.32747/2018.6893749.ch.

Full text
Abstract:
Rainfall intensity is increasing in the Northeastern U.S. Stabilizing gullies is one strategy for adapting to this changing climate. This case study evaluates the costs and benefits of restoring gullies at Last Resort Farm.
APA, Harvard, Vancouver, ISO, and other styles
4

Frederick, Jennifer M., Matthew Anthony Thomas, Diana L. Bull, Craig A. Jones, and Jesse D. Roberts. The Arctic Coastal Erosion Problem. Office of Scientific and Technical Information (OSTI), September 2016. http://dx.doi.org/10.2172/1431492.

Full text
APA, Harvard, Vancouver, ISO, and other styles
5

Whyte, D. G., R. Bastasz, W. R. Wampler, J. N. Brooks, W. P. West, and C. P. C. Wong. Divertor erosion in DIII-D. Office of Scientific and Technical Information (OSTI), May 1998. http://dx.doi.org/10.2172/654183.

Full text
APA, Harvard, Vancouver, ISO, and other styles
6

Montalvo-Bartolomei, Axel, Bryant Robbins, Erica Medley, and Benjamin Breland. Backward erosion testing : Magnolia Levee. Engineer Research and Development Center (U.S.), September 2021. http://dx.doi.org/10.21079/11681/42140.

Full text
Abstract:
Using a confined flume device, an experimental study investigated the critical horizontal gradient of soils obtained from a site identified as potentially vulnerable to backward erosion piping (BEP). Tests were conducted on glacial outwash material obtained from a sand and gravel quarry in the vicinity of Magnolia Levee in the community of Magnolia, OH. The two bulk samples collected from the quarry had similar grain-size distributions, grain roundness, and depositional environments as the foundation materials beneath the levee. Samples were prepared at various densities and subjected to gradual increases of flow in a wooden flume with an acrylic top until BEP was observed. The critical average horizontal gradient ranged from 0.21 to 0.30 for a bulk sample with a coefficient of uniformity of 1.6, while tests conducted on a bulk sample with a coefficient of uniformity of 2.5 yielded critical average horizontal gradients of 0.31 to 0.36. The critical average gradients measured during these tests compared favorably to values in the literature after applying adjustments according to Schmertmann’s method.
APA, Harvard, Vancouver, ISO, and other styles
7

Shannon, Jameson. Low-logistic erosion control methodologies. Engineer Research and Development Center (U.S.), April 2022. http://dx.doi.org/10.21079/11681/46914.

Full text
Abstract:
This paper provides an in-depth review of certain slope stability practices discussed in ERDC/GSL TR-19-44, a technical report titled Erosion Control of Earth Covered Magazines to Maintain Minimum Cover Requirements. At the request of the sponsor, US Army Engineering and Support Center, this document specifically focuses on cost-efficient, low-logistic methods of erosion control such as shotcrete and spray-applied stabilizers.
APA, Harvard, Vancouver, ISO, and other styles
8

Maniaci, David, Hamish MacDonald, Joshua Paquette, and Ryan Clarke. Leading Edge Erosion Classification System. Office of Scientific and Technical Information (OSTI), February 2023. http://dx.doi.org/10.2172/2432094.

Full text
APA, Harvard, Vancouver, ISO, and other styles
9

Wieting, Celeste, Sara Rathburn, and John Kemper. Evaluation of gully erosion for archaeological preservation in Wupatki National Monument. National Park Service, 2024. http://dx.doi.org/10.36967/2302447.

Full text
Abstract:
Wupatki National Monument contains an abundance of prehistoric and historic archaeological sites that are vulnerable to gully erosion from heavy sporadic rainstorms. Increased erosional risks are predicted as more extreme weather causes frequent or intense rainfall, flooding, and gullying. At Wupatki National Monument, gullies generally form on hillslopes within volcanic-derived cinders that are ubiquitous across the landscape and are unconsolidated, non-cohesive, highly mobile, and permeable. Lithological differences between volcanic cinders and underlying sedimentary rocks, and surface runoff influence the progression of gully erosion near archaeological sites. We assessed gullies based on changes in gully morphology and categorized archaeological sites based on vulnerability from erosion and runoff processes. We found that 35 measured gullies are actively eroding, with statistically significant changes in gully depth from 2016 to 2021. Up to 0.5 m of incision was documented over a five-year period. A structure from motion analysis at the hillslope scale confirmed gully morphological changes and supports the applicability of conducting similar analyses on a larger scale. More erosion occurred in gullies with catchments predominantly covered with cinders because of cinder mobility. We noted a weak relationship between gully catchment area and gully head slope, likely related to runoff processes from outcrops of resistant sedimentary rocks forming cliffs and characteristics of cinders that maximize infiltration and transport. Based on our assessment of gully morphologic change and substrate characteristics, 22 archaeological sites along Wupatki Wash were identified as having a high vulnerability to erosion, helping monument managers to prioritize their monitoring initiatives.
APA, Harvard, Vancouver, ISO, and other styles
10

Overbeck, J. R. Coastal flooding & erosion in Alaska. Alaska Division of Geological & Geophysical Surveys, June 2018. http://dx.doi.org/10.14509/30057.

Full text
APA, Harvard, Vancouver, ISO, and other styles
You might also be interested in the extended bibliographies on the topic 'Erosion' for particular source types:
Journal articles Dissertations / Theses Books
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!

To the bibliography