Bibliografie tematiche / Salinisation

Indice

  1. Articoli di riviste
  2. Tesi
  3. Libri
  4. Capitoli di libri
  5. Atti di convegni

Letteratura scientifica selezionata sul tema "Salinisation"

Autore: Grafiati
Pubblicato: 4 giugno 2021
Ultima modifica: 13 aprile 2024

Cita una fonte nei formati APA, MLA, Chicago, Harvard e in molti altri stili

Scegli il tipo di fonte:

Consulta la lista di attuali articoli, libri, tesi, atti di convegni e altre fonti scientifiche attinenti al tema "Salinisation".

Accanto a ogni fonte nell'elenco di riferimenti c'è un pulsante "Aggiungi alla bibliografia". Premilo e genereremo automaticamente la citazione bibliografica dell'opera scelta nello stile citazionale di cui hai bisogno: APA, MLA, Harvard, Chicago, Vancouver ecc.

Puoi anche scaricare il testo completo della pubblicazione scientifica nel formato .pdf e leggere online l'abstract (il sommario) dell'opera se è presente nei metadati.

Articoli di riviste sul tema "Salinisation"

1

De Pascale, Stefania, Francesco Orsini, Rosanna Caputo, Maria Antonella Palermo, Giancarlo Barbieri e Albino Maggio. "Seasonal and multiannual effects of salinisation on tomato yield and fruit quality". Functional Plant Biology 39, n. 8 (2012): 689. http://dx.doi.org/10.1071/fp12152.

Testo completo
Abstract (sommario):
The effects of short- and long-term salinisation were studied by comparing tomato growth on a soil exposed to one-season salinisation (short term) vs growth on a soil exposed to >20 years salinisation (long term). Remarkable differences were associated to substantial modifications of the soil physical-chemical characteristics in the root zone, including deteriorated structure, reduced infiltration properties and increased pH. Fresh yield, fruit number and fruit weight were similarly affected by short- and long-term salinisation. In contrast, the marketable yield was significantly lower in the long-term salinised soil – a response that was also associated to nutritional imbalance (mainly referred to P and K). As reported for plants growing under oxygen deprivation stress, the antioxidant capacity of the water soluble fraction of salinised tomato fruits was enhanced by short-term salinisation, also. Overall, long-term salinisation may cause physiological imbalances and yield reductions that cannot be solely attributed to hyperosmotic stress and ionic toxicity. Therefore, the ability of plants to cope with nutritional deficiency and withstand high pH and anoxia may be important traits that should be considered to improve plant tolerance to long-term salinised soils.
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Schulz, Claus-Jürgen. "Salinisation of running waters". Limnologica 41, n. 2 (maggio 2011): 79. http://dx.doi.org/10.1016/j.limno.2011.01.003.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Hoey, D., M. Ahmed e M. Littleboy. "Landscape Salinisation and Management: An Australian Perspective". Journal of Agricultural and Marine Sciences [JAMS] 7, n. 2 (1 giugno 2002): 53. http://dx.doi.org/10.24200/jams.vol7iss2pp53-60.

Testo completo
Abstract (sommario):
Australian landscapes are facing an increasing salinisation threat. It is estimated that 2.5 million hectares are affected by land salinisation, and this area is expected to triple by 2050. Federal and State governments have jointly developed a policy framework to address this issue, with each state refining their own salinity management strategies within this framework. Scientific assessment and modelling underpin these salinity management strategies, though socio-economic considerations are also important. Landscape salinity assessment techniques used in the Australian context are outlined, and examples of salinity hazard and recharge mapping at the landscape scale described. Current developments in both recharge assessment, and groundwater flow modelling in Australia are described, and the use of these models in underpinning state salinity strategic planning discussed. The salinity management ‘toolkit’ is discussed. The progression from initially applying engineering solutions to deal with the symptoms of salinisation; to dealing with the causes of salinisation; to developing an integrated catchment management approach; to including a stronger emphasis on market-based economic measures; and the importance of over-arching Catchment Blueprints, is described in detail.The application of knowledge and experience gained through the management of Australian land salinisation to other countries is discussed in the context of the salinity problem in the Sultanate of Oman.
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Chabab, Elena, Michael Kühn e Thomas Kempka. "Upwelling mechanisms of deep saline waters via Quaternary erosion windows considering varying hydrogeological boundary conditions". Advances in Geosciences 58 (14 novembre 2022): 47–54. http://dx.doi.org/10.5194/adgeo-58-47-2022.

Testo completo
Abstract (sommario):
Abstract. Intrusion of deep saline waters into freshwater aquifers does not only endanger the regional drinking water supply, but also rivers and stagnant waters and their fauna are threatened by salinisation. The upwelling of highly mineralised saline waters in large parts of the North German Basin is favoured by the presence of Elsterian glacial erosion windows in the Lower Oligocene Rupelian Clay, the most important hydraulic confining unit in this region. Lower precipitation rates and decreasing groundwater levels as a consequence of global climate change, but also anthropogenic interventions, such as increasing extraction rates or the use of the deep geologic subsurface as a reservoir, decrease the pressure potential in the freshwater column and may possibly accelerate this primarily geogenic salinisation process in the coming years. Density-driven flow and transport modelling was performed in the scope of the present study to investigate the upwelling mechanisms of deep saline waters across Quaternary window sediments in the Rupelian. Simulation results show that the interactions between the groundwater recharge rate and anthropogenic interventions such as extraction rates of drinking water wells or the utilisation of the deep subsurface, have a significant influence on the groundwater pressure potential in the freshwater aquifer and associated saltwater upwelling. In all scenarios, salinisation is most severe in the sediments of the erosion windows. Hydraulically conductive faults also intensify salinisation if located nearside erosion windows or induce a more distributed or localised salinisation in aquifers with drinking water relevance in areas that do not intersect with erosion windows. A decline in groundwater recharge thereby significantly favours upward saltwater migration. The simulation scenarios further show that a decrease in groundwater recharge also results in freshwater salinisation occurring up to 10 years earlier, which underlines the need for waterworks to initiate effective countermeasures quickly and in time.
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Pauw, P., P. G. B. de Louw e G. H. P. Oude Essink. "Groundwater salinisation in the Wadden Sea area of the Netherlands: quantifying the effects of climate change, sea-level rise and anthropogenic interferences". Netherlands Journal of Geosciences - Geologie en Mijnbouw 91, n. 3 (novembre 2012): 373–83. http://dx.doi.org/10.1017/s0016774600000500.

Testo completo
Abstract (sommario):
AbstractHydrogeological research in coastal areas has gained considerable attention over the last decades due to increasing stresses on fresh groundwater resources. Fundamental groundwater flow and solute transport analyses remain essential for a concise understanding of the governing processes that lead to salinisation of fresh groundwater resources. However, the challenge of modern research is the application and quantification of these processes in real world cases. In this context, deltaic areas are amongst the most difficult study areas as they often have a complex groundwater salinity distribution. The Wadden Sea area in the northern part of the Netherlands is an example of such an area.We quantified salt water intrusion and salinisation of groundwater flow systems in two representative case studies in the Wadden Sea area, using the density dependent groundwater flow and transport code M0CDENS3D. The results indicate that sea-level rise and autonomous processes will cause severe salinisation in the future, especially in the low polder areas close to the sea. In addition, we show that enhanced land subsidence due to salt exploitation accelerates this process. Salinisation can be mitigated to some extent by raising surface water levels in polders and by creating saline groundwater collection areas that maintain a low controlled water level.
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Tillner, Elena, Maria Langer, Thomas Kempka e Michael Kühn. "Fault damage zone volume and initial salinity distribution determine intensity of shallow aquifer salinisation in subsurface storage". Hydrology and Earth System Sciences 20, n. 3 (8 marzo 2016): 1049–67. http://dx.doi.org/10.5194/hess-20-1049-2016.

Testo completo
Abstract (sommario):
Abstract. Injection of fluids into deep saline aquifers causes a pore pressure increase in the storage formation, and thus displacement of resident brine. Via hydraulically conductive faults, brine may migrate upwards into shallower aquifers and lead to unwanted salinisation of potable groundwater resources. In the present study, we investigated different scenarios for a potential storage site in the Northeast German Basin using a three-dimensional (3-D) regional-scale model that includes four major fault zones. The focus was on assessing the impact of fault length and the effect of a secondary reservoir above the storage formation, as well as model boundary conditions and initial salinity distribution on the potential salinisation of shallow groundwater resources. We employed numerical simulations of brine injection as a representative fluid. Our simulation results demonstrate that the lateral model boundary settings and the effective fault damage zone volume have the greatest influence on pressure build-up and development within the reservoir, and thus intensity and duration of fluid flow through the faults. Higher vertical pressure gradients for short fault segments or a small effective fault damage zone volume result in the highest salinisation potential due to a larger vertical fault height affected by fluid displacement. Consequently, it has a strong impact on the degree of shallow aquifer salinisation, whether a gradient in salinity exists or the saltwater–freshwater interface lies below the fluid displacement depth in the faults. A small effective fault damage zone volume or low fault permeability further extend the duration of fluid flow, which can persist for several tens to hundreds of years, if the reservoir is laterally confined. Laterally open reservoir boundaries, large effective fault damage zone volumes and intermediate reservoirs significantly reduce vertical brine migration and the potential of freshwater salinisation because the origin depth of displaced brine is located only a few decametres below the shallow aquifer in maximum. The present study demonstrates that the existence of hydraulically conductive faults is not necessarily an exclusion criterion for potential injection sites, because salinisation of shallower aquifers strongly depends on initial salinity distribution, location of hydraulically conductive faults and their effective damage zone volumes as well as geological boundary conditions.
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Snezhko, V. L., D. M. Benin e N. V. Gavrilovskaya. "Salinisation of Reclaimed Agricultural Land in the Altai Territory: Cluster Analysis". Timiryazev Biological Journal, n. 2 (21 marzo 2023): 107–17. http://dx.doi.org/10.26897/2949-4710-2023-2-107-117.

Testo completo
Abstract (sommario):
The Altai Territory occupies a leading position among the constituent entities of the Siberian Federal District in terms of arable land, of which more than 80% are located in the zone of unstable moisture. Irrigation is the predominant form of agricultural hydraulic reclamation in the region. The area of irrigated land is about 69 thousand hectares, of which almost 10% of the area has varying degrees of salinity in the 0‑100 cm layer. Prolonged irrigation and non-compliance with irrigation technologies can lead to salinisation of land. In the Russian Federation, all irrigation systems havecommon rules for collecting data on soil condition, conducting soil salinity surveys and laboratory processing of field research material. The analysis of irrigated agricultural land by the degree of its salinisation was carried out according to the data of the land reclamation cadastre for the period from 1 January 2013 to 1 January 2022. A model of the dynamics of highly and very highly saline areas was built, statistical estimates of the quality of the model were checked, and the average annual rate of increase in the area of saline areas was determined. The most likely causes of salinisation in irrigated areas were analysed. These are high groundwater levels and groundwater salinity, and high salinity of water used for irrigation. An analysis of the most likely causes of salinisation in irrigated areas was carried out, including high groundwater levels and salinity, and high salinity of water used for irrigation. The dynamics of areas with different groundwater levels, different salinities of groundwater and irrigation water are given. Based on the data from the beginning of 2022, a cluster analysis of the regions of the Altai Territory was carried out according to the degree of salinisation of agricultural land. The quality of the clustering was checked.
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Wilkinson, Kate, Tessa Chamberlain e Mike Grundy. "Investigation into salinisation in southwestern Queensland". ASEG Extended Abstracts 2004, n. 1 (dicembre 2004): 1–4. http://dx.doi.org/10.1071/aseg2004ab159.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Barnett, Steve. "The looming threat of aquifer salinisation". ASEG Extended Abstracts 2006, n. 1 (dicembre 2006): 1–4. http://dx.doi.org/10.1071/aseg2006ab009.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Jiang, Shan, Xuan Wu, Sichan Du, Qin Wang e Dawei Han. "Are UK Rivers Getting Saltier and More Alkaline?" Water 14, n. 18 (9 settembre 2022): 2813. http://dx.doi.org/10.3390/w14182813.

Testo completo
Abstract (sommario):
River salinisation and alkalinisation have become one of the major environmental problems threatening the safety of global freshwater resources. With the accelerated climate change and aggravating anthropogenic influences, it is important to identify the trends and causes of river salinisation and alkalinisation so that better mitigation measures could be taken. This study has focused on the UK rivers because there has been insufficient investigation on this topic. To understand the salinisation and alkalinisation trends and causes of rivers in the UK over the past 20 years from a vertical (analysis of each river) and horizontal (comparison of all rivers) perspective, this study uses the Theil-Sen regression and Mann-Kendall test to deal with the trends of conductivity (proxy on salinisation) and pH (proxy on alkalinisation), obtains outliers of conductivity and pH by boxplot, and calculates the Pearson’s and the Kendall’s Tau correlation coefficients (α = 0.05) between the water quality data and the potential factors (potential road salting, normalized difference vegetation index (NDVI), river discharge, agricultural and urban lands). The results show that the UK rivers are becoming more alkaline with a median pH increase of 0.05 to 0.40, but less salty with a median conductivity decrease of 0.06 to 0.11 mS/cm. And the changes in conductivity and pH have seasonality and regionality, which shows that there are usually greater changes in trends and medians of them in winter or through reaches with more anthropogenic disturbance. Furthermore, from a vertical perspective, the conductivity of more than 50% of rivers in this study is negatively correlated with NDVI and river discharge, and positively correlated with potential road salting, and the pH of that is positively correlated with agricultural lands. While from a horizontal perspective, NDVI and agricultural lands are positively correlated with pH, and potential road salting and urban lands are positively correlated with conductivity. Therefore, road salting, urbanisation, agricultural lands, river discharge and vegetation cover can be considered to affect river salinisation and alkalinisation in the UK.
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Tesi sul tema "Salinisation"

1

Montety, Véronique de Blavoux Bernard. "Salinisation d'un aquifère captif côtier en contexte deltaïque cas de la Camargue (delta du Rhône, France) /". Villeurbanne : TEL, 2008. http://tel.archives-ouvertes.fr/docs/00/33/64/17/PDF/These_V_de_Montety2008.pdf.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Stevens, Robert M. "The response of grapevines to transient soil salinisation /". Title page, contents and abstract only, 1995. http://web4.library.adelaide.edu.au/theses/09A/09as848.pdf.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Leitão, João Luís Vieira. "Climate changes: effects of secondary salinisation in freshwater organisms". Master's thesis, Universidade de Aveiro, 2011. http://hdl.handle.net/10773/8332.

Testo completo
Abstract (sommario):
Mestrado em Biologia Aplicada
As global climate patterns change, so will freshwater availability. Specially, salinisation of freshwater costal ecosystem is a major point of concern; either by surface flooding or by groundwater intrusions of seawater. This may be potentiated by the decrease of freshwater availability provoked by longer drought periods, evaporation, and increased freshwater extraction (for example for agriculture and other human uses). According, the present work aimed at evaluating how freshwater organisms responded to an increase in salinity. To achieve this main objective two specific goals were delineated: (i) to compare the toxicity of seawater with a surrogate (NaCl), commonly used in laboratory toxicity assays, to two standard freshwater species, and (ii) to assess if an association exist between resistance to chemical contamination and to increased salinity; since many populations, predicted to experience future increased salinity, are presently exposed to chemical contamination. To accomplish the first objective the sensitivity of the green algae Pseudokirchneriella subcapitata (Korshikov) F. Hindák and of the cladoceran Daphnia magna Straus to NaCl and to natural seawater was evaluated. Growth rate for P. subcapitata, and mortality, time to release the first brood, body size, total reproduction, and intrinsic rate of natural increase for D. magna, were monitored after exposing these species to two series of solutions with an increasing gradient of salinity. One series of solutions was established with a natural seawater sample and the other with NaCl dissolved artificial media. To address the second objective, four cloned lineages of Daphnia longispina O.F. Müller, exhibiting different sensitivities to lethal levels of copper, were exposed to a gradient of lethal and sublethal levels of salinity, established with the salt NaCl. The same endpoins described for D. magna were also monitored for D. longispina. The obtained results showed that NaCl exerted a higher toxicity to P. subcapitata (LOEC of 5.9mS/cm and 9.6mS/cm, respectively for NaCl and seawater) and to D. magna (LC50,48h of 9.88mS/cm and 11.32mS/cm; and EC50 for total reproduction of 8.9mS/cm and 10.4mS/cm, respectively for NaCl and seawater) than the natural seawater. These data suggest that the use of NaCl as a surrogate for seawater to predict, in laboratory, the effects of seawater intrusion in freshwater is a protective approach as it simulates a “Worst Case Scenario” of exposure. An association between resistance to copper and to NaCl was not observed for the tested cloned lineages of D. longispina (r < 0.92 and p > 0.08), though the two clonal lineages most resistant to copper also exhibited the highest sensitivity to sublethal levels of NaCl (determined as the EC20 for total reproduction). Finally, obtained data demonstrated that D. longispina was more sensitive to increased salinity (LC50,48h of 2.85g/L to 2.48g/L or, conductivity values of LC50,48h of 5.50mS/cm to LC50,48h= 4.57mS/cm which correspond respectively to the highest and lowest recorded values in these assays) than the standard species (D. magna), highlighting the importance of using autochthonous species for the ecological risk assessment of secondary salinisation.
À medida que os padrões climáticos se alteram também a disponibilidade de água doce se irá alterar. Como tal, a salinização de ecossistemas costeiros, principalmente os dulçaquicolas, torna-se um ponto de preocupação fundamental. Quer devido ao aumento de intrusões de água do mar por inundação ou por intrusões salinas através dos lençóis freáticos, quer devido à diminuição de entrada de água doce, provocada por períodos mais prolongados de seca, evaporação e aumento do uso de água para actividades antropogénicas. De acordo com o exposto, o presente trabalho pretendeu avaliar as respostas de organismos dulçaquicolas a alterações provocadas pelo aumento de salinidade. Para atingir este objectivo principal foram delineados dois objectivos específicos: (i) comparar a toxicidade de água do mar com a do sal NaCl, comummente usado em laboratório como substituto de água do mar e (ii) averiguar uma possível correlação entre a resistência a contaminação química (cobre) e a aumento de salinidade; uma vez que muitas das populações que se prevê virem a ser afectadas por salinização estão, presentemente, já expostas a contaminação química. Para abordar o primeiro objectivo, a alga verde Pseudokirchneriella subcapitata (Korshikov) F. Hindák e o cladócero Daphnia magna Straus foram expostos a dois gradientes crescentes de salinidade estabelecidos com água do mar natural e com NaCl dissolvido num meio artificial.. No ensaio com a alga verde unicelular foi avaliada a inibição do crescimento; no ensaio com D. magna foram avaliados os seguintes parâmetros: mortalidade, tempo decorrido até libertar a primeira ninhada, comprimento corporal, reprodução total, taxa de crescimento intrínseco. Para atingir o segundo objectivo, foram seleccionadas quatro linhagens do cladócero Daphnia longispina O.F Müller com sensibilidades diferentes a níveis letais de cobre. As quatro linhagens foram expostas a um gradiente de concentrações, letais e sub-letais, de NaCl. Neste ensaio foram analisados os mesmo parâmetros descritos anteriormente para o ensaio com D. magna. Os resultados demonstram que o sal NaCl apresentou maior toxicidade do que a água do mar natural, quer para P. subcapitata (LOEC de 5.9mS/cm e de 9.6mS/cm, respectivamente para NaCl e água do mar), quer para D. magna (LC50,48h de 9.88mS/cm e LC50,48h= 11.32mS/cm; e EC50, para reprodução total, de 8.9mS/cm e 10.4mS/cm, respectivamente para NaCl e água do mar). Estes dados sugerem que o uso de NaCl, em laboratório, como um substituto de água do mar deve ser considerado como uma abordagem protectora, uma vez que simula um cenário de maior toxicidade. Não foi observada uma associação significativa entre maior resistência a cobre e a NaCl nas linhagens de D. longispina testadas (r < 0.92 and p ≥ 0.08), apesar de as duas linhagens mais resistentes a cobre apresentarem as maiores sensibilidades a níveis subletais (para reprodução total) de NaCl. Finalmente, os dados obtidos demonstram que D. longispina é mais sensível ao aumento de salinidade (o intervalo de valores de LC50,48h calculados foi de 2.85g/l a 2.48g/l de NaCl, correspondente a valores de conductividade de 5.50mS/cm e 4.57mS/cm, respectivamente) que a espécie padrão (D. magna), salientando a importância do uso de espécies autóctones na avaliação de risco ecológico em situações de intrusões salinas.
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Ahmed, Mohammad Faruque. "Simulating and assessing salinisation in the lower Namoi Valley". Thesis, The University of Sydney, 2001. http://hdl.handle.net/2123/811.

Testo completo
Abstract (sommario):
Dryland salinity is increasing in the upper catchments of central and northern New South Wales, Australia. Consequently, salts may be exported downstream, which could adversely affect cotton irrigated-farming systems. In order to assess the potential threat of salinity a simple salt balance model based on progressively saline water (i.e., ECiw 0.4, 1.5, 4.0 and 9.0 dS/m) was used to simulate the potential impact of salinisation due to the farming systems. The study was carried out in the lower Namoi valley of northern New South Wales, Australia. A comparison has been made of the various non-linear techniques (indicator kriging, multiple indicator kriging and disjunctive kriging) to determine an optimal simulation method for the risk assessment. The simulation results indicate that potential salinisation due to application of the water currently used for irrigation (ECiw) is minimal and may not pose any problems to sustainability of irrigated agriculture. The same results were obtained by simulation based on irrigation using slightly more saline water (ECiw 1.4 dS/m). However, simulations based on irrigation using water of even lower quality (ECiw of 4 and 9.0 dS/m), shows potential high salinisation, which will require management inputs for sustainable cropping systems, especially legumes and wheat, which are used extensively in rotation with cotton. Disjunctive kriging was the best simulation method, as it produced fewer misclassifications in comparison with multiple-indicator kriging and indicator kriging. This study thus demonstrates that we can predict the salinity risk due to application of irrigation water of lower quality than that of the current water used. In addition, the results suggest here problems of excessive deep drainage and inefficient use of water might be a problem. The second part of this thesis deals with soil information required at the field scale for management practices particularly in areas where deep drainage is large. Unfortunately, traditional methods of soil inventory at the field level involve the design and adoption of sampling regimes and laboratory analysis that are time-consuming and costly. Because of this more often than not only limited data are collected. In areas where soil salinity is prevalent, detailed quantitative information for determining its cause is required to prescribe management solutions. This part deals with the description of a Mobile Electromagnetic Sensing System (MESS) and its application in an irrigated-cotton field suspected of exhibiting soil salinity. The field is within the study area of part one of this thesis-located about 2 km south west of Wee Waa. The EM38 and EM31 (ECa) data provide information, which was used in deciding where soil sample sites could be located in the field. The ECa data measured by the EM38 instrument was highly correlated with the effective cation exchange capacity. This relationship can be explained by soil mineralogy. Using different soil chemical properties (i.e. ESP and Ca/Mg ratio) a detailed transect study was undertaken to measure soil salinity adjoining the water storage. It is concluded that the most appropriate management option to remediation of the problem would be to excavate the soil directly beneath the storage floor where leakage is suspected. It is recommended that the dam not be enlarged from its current size owing to the unfavourable soil mineralogy (i.e. kaolin/illite) located in the area where it is located.
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Ahmed, Mohammad Faruque. "Simulating and assessing salinisation in the lower Namoi Valley". University of Sydney. Land Water and Crop Sciences, 2001. http://hdl.handle.net/2123/811.

Testo completo
Abstract (sommario):
Dryland salinity is increasing in the upper catchments of central and northern New South Wales, Australia. Consequently, salts may be exported downstream, which could adversely affect cotton irrigated-farming systems. In order to assess the potential threat of salinity a simple salt balance model based on progressively saline water (i.e., ECiw 0.4, 1.5, 4.0 and 9.0 dS/m) was used to simulate the potential impact of salinisation due to the farming systems. The study was carried out in the lower Namoi valley of northern New South Wales, Australia. A comparison has been made of the various non-linear techniques (indicator kriging, multiple indicator kriging and disjunctive kriging) to determine an optimal simulation method for the risk assessment. The simulation results indicate that potential salinisation due to application of the water currently used for irrigation (ECiw) is minimal and may not pose any problems to sustainability of irrigated agriculture. The same results were obtained by simulation based on irrigation using slightly more saline water (ECiw 1.4 dS/m). However, simulations based on irrigation using water of even lower quality (ECiw of 4 and 9.0 dS/m), shows potential high salinisation, which will require management inputs for sustainable cropping systems, especially legumes and wheat, which are used extensively in rotation with cotton. Disjunctive kriging was the best simulation method, as it produced fewer misclassifications in comparison with multiple-indicator kriging and indicator kriging. This study thus demonstrates that we can predict the salinity risk due to application of irrigation water of lower quality than that of the current water used. In addition, the results suggest here problems of excessive deep drainage and inefficient use of water might be a problem. The second part of this thesis deals with soil information required at the field scale for management practices particularly in areas where deep drainage is large. Unfortunately, traditional methods of soil inventory at the field level involve the design and adoption of sampling regimes and laboratory analysis that are time-consuming and costly. Because of this more often than not only limited data are collected. In areas where soil salinity is prevalent, detailed quantitative information for determining its cause is required to prescribe management solutions. This part deals with the description of a Mobile Electromagnetic Sensing System (MESS) and its application in an irrigated-cotton field suspected of exhibiting soil salinity. The field is within the study area of part one of this thesis-located about 2 km south west of Wee Waa. The EM38 and EM31 (ECa) data provide information, which was used in deciding where soil sample sites could be located in the field. The ECa data measured by the EM38 instrument was highly correlated with the effective cation exchange capacity. This relationship can be explained by soil mineralogy. Using different soil chemical properties (i.e. ESP and Ca/Mg ratio) a detailed transect study was undertaken to measure soil salinity adjoining the water storage. It is concluded that the most appropriate management option to remediation of the problem would be to excavate the soil directly beneath the storage floor where leakage is suspected. It is recommended that the dam not be enlarged from its current size owing to the unfavourable soil mineralogy (i.e. kaolin/illite) located in the area where it is located.
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Clarke, Catherine Bernadette. "Screening for enhanced salt tolerance in Arabidopsis thaliana L. with particular consideration of altered stomatal function". Thesis, Lancaster University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.250151.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Callow, John Nikolaus. "River response to land clearing and landscape salinisation in southwestern Australia". University of Western Australia. School of Earth and Geographical Sciences, 2007. http://theses.library.uwa.edu.au/adt-WU2007.0085.

Testo completo
Abstract (sommario):
[Truncated abstract] Land clearing is known to increase runoff, and in many dryland landscapes is also associated with rising saline watertables, causing increased stream salinity and degrading riparian vegetation. The limited understanding of how river morphology responds to these changes and the potential for vegetation-based strategies to offer river management options under these conditions, has prompted this research. In southwestern Australia the severity of salinity and recent nature of land clearing provides an appropriate setting to investigate river response. A data-based, multidisciplinary methodology was applied to determine how land clearing and landscape salinisation has altered landscape sensitivity through changes in erosive potential, system connectivity and material threshold mechanisms, and how these affect patterns of river response. The study investigated the responses of morphologically similar reaches across fifty two study sites in the Kent River and Dalyup River catchments, in the south coastal rivers region of Western Australia. Land clearing was found to have significantly altered the hydrologic regime and erosive potential in both frequency and magnitude, with flow becoming more perennial, and increased annual discharge, flood peaks and bankfull flow frequency. While sediment transport rates have also increased since land clearing, they remain low on a global scale. Human response to a reduced rainfall regime and related water security pressures has caused large hillslope areas to be decoupled from the main channels by bank and farm dam construction, and have reduced downstream transmission of change. ... By contrast, steeper-sloped mid-catchment areas with minimal vegetation degradation caused by salinity are associated with higher erosive potential. A more erosive response is observed in these reaches where floodplains have been cleared for agricultural purposes. A conceptual model of vegetation growth across the salinity gradient observed in the study catchments was developed, and applied to selected river styles to assess the potential that vegetation-based strategies offer for river management. This work identifies the unsuitability of river restoration strategies, but the potential for river restoration or remediation in a saline landscape. Hydraulic modelling demonstrated that river rehabilitation strategies such as improving the vegetation condition of the riparian buffer using native or commercial species on areas elevated above saline flow can stabilise reaches. For river styles in wide and flat valleys, there is limited potential for vegetation-based river rehabilitation under the current salinity gradient. Field observation and modelling suggest that river remediation may offer geomorphic management options in salt-affected reaches through channelisation to lower watertables, and further research on this is warranted. This work found a consistent response for river styles across the two study catchments. Based on the understanding of river response and the potential for vegetation-based river management for each style, this research offers a regional-scale tool for river management in a saline landscape.
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Kirkby, S. D. "Managing dryland salinisation with an integrated expert system/geographic information system /". Title page, abstract and table of contents only, 1994. http://web4.library.adelaide.edu.au/theses/09PH/09phk593.pdf.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Barbecot, Florent. "Approche géochimique des mécanismes de salinisation des aquifères côtiers : chronologies 14C-226Ra". Paris 11, 1999. http://www.theses.fr/1999PA112319.

Testo completo
Abstract (sommario):
Les aquiferes cotiers, part non negligeable des ressources en eau des bassins sedimentaires en france, ont subi des changements de gradients hydrauliques et de proprietes hydrodynamiques, en reponse aux periodes de decharge/recharge dues aux variations du niveau marin et/ou aux forcages anthropiques. Cette etude a pour objectif principal la comprehension des conditions de recharge et de decharge a l'origine des eaux salees reconnues sur trois sites : les aquiferes du dogger des cotes de la manche (caen) et de l'atlantique (marais poitevin), ainsi que l'aquifere des sables astiens (cap d'agde). Pour les trois sites, les eaux douces recentes sont marquees par une anthropisation des aires de recharge. Le long d'une ligne d'ecoulement, les signatures geochimiques dependent de la nature des formations aquiferes et relevent des interactions eau-roche. Les temps de residence des eaux douces evoluent de l'actuel (site atlantique) a la limite de la methode du 1 4c (site de la manche). Les eaux de l'aquifere des sables astiens montrent une gamme d'ages holocene, determinee par le 1 4c et le 2 2 6ra. De l'actuel a 3 ka, les ages 1 4c et 2 2 6ra sont identiques. Au dela, les ecarts observes peuvent etre associes a une sous-estimation de la production de 2 2 6ra in-situ, mais plus vraisemblablement, a l'effet tampon- 1 4c lors de l'equilibration isotopique avec la matrice. D'origine marine, la signature des eaux salees reconnues sur les trois sites a ete modifiee par interaction avec des horizons tourbeux, par echange cationique, ou par apport de carbone d'origine profonde. Ces processus de salinisation sont lies a un debordement marin en plaine ou a une drainance d'eau carbo-gazeuse provenant d'un aquifere profond. Les intrusions marines affectant des sites de l'atlantique et de la manche ont pu etre associees a la transgression flandrienne (respectivement 8 ka et 4,8-10,8 ka b. P. ). Pour les sables astiens, le temps ecoule depuis le melange profond eau-co 2 a pu etre estime a 0,5-3 ka.
Gli stili APA, Harvard, Vancouver, ISO e altri
10

Smith, Michael S. "Development, hydrology and salinisation of the regolth at Bamganie-Meredith, Victoria, Australia". Thesis, Federation University Australia, 2001. http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/164964.

Testo completo
Abstract (sommario):
The thesis looks at landscape evolution and salinisation in the Bamganie-Meredith region of Victoria. The importance of reducing waterlogging is stressed if successful land management is to be achieved.
Master of Applied Science
Gli stili APA, Harvard, Vancouver, ISO e altri
Più fonti

Libri sul tema "Salinisation"

1

Shukla, M. K. Soil salinisation and reclamation in command areas. Roorkee: National Institute of Hydrology, 1993.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Commission, Gujarat Ecology, e Gujarat Ecological Society, a cura di. Salinisation and ecological degradation around the Ranns, Gujarat: A status report. Vadodara: The Society, 1999.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

1951-, Jakeman A. J., e Nix H. A, a cura di. Salinisation of land and water resources: Human causes, extent, management and case studies. Wallingford, Oxon: CAB International, 1995.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Ghassemi, F., A. J. Jakeman e H. A. Nix. Salinisation of Land and Water Resources: Human Causes, Extent, Management and Case Studies. International Specialized Book Services, 1999.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Ghassemi, F., A. J. Jakeman e H. A. Nix. Salinisation of Land and Water Resources: Human causes, extent, management and case studies (Cabi Publishing). CABI, 1996.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Zinck, Alfred, e Graciela Metternicht. Remote Sensing of Soil Salinization: Impact on Land Management. Taylor & Francis Group, 2008.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

Zinck, Alfred, e Graciela Metternicht. Remote Sensing of Soil Salinization. Taylor & Francis Group, 2019.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Zinck, Alfred, e Graciela Metternicht. Remote Sensing of Soil Salinization: Impact on Land Management. Taylor & Francis Group, 2008.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

Coastal Saline Soil Rehabilitation and Utilization Based on Forestry Approach in China. Springer Berlin / Heidelberg, 2013.

Cerca il testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Capitoli di libri sul tema "Salinisation"

1

Williams, W. D. "Anthropogenic salinisation of inland waters". In Saline Lakes, 329–37. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-017-2934-5_30.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Clarke, Derek, Attila N. Lázár, Abul Fazal M. Saleh e Mohammad Jahiruddin. "Prospects for Agriculture Under Climate Change and Soil Salinisation". In Ecosystem Services for Well-Being in Deltas, 447–67. Cham: Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-319-71093-8_24.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Crescimanno, Giuseppina, Kenneth B. Marcum, Francesco Morga e Carlo Reina. "Monitoring Soil Salinisation as a Strategy for Preventing Land Degradation: A Case Study in Sicily, Italy". In Land Degradation and Desertification: Assessment, Mitigation and Remediation, 467–75. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-8657-0_35.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Chagué-Goff, Catherine, Henri K. Y. Wong, Daisuke Sugawara, James Goff, Yuichi Nishimura, Jennifer Beer, Witold Szczuciński e Kazuhisa Goto. "Impact of Tsunami Inundation on Soil Salinisation: Up to One Year After the 2011 Tohoku-Oki Tsunami". In Advances in Natural and Technological Hazards Research, 193–214. Dordrecht: Springer Netherlands, 2013. http://dx.doi.org/10.1007/978-94-007-7269-4_10.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Askri, Brahim, e Razan Ali Al-Shanfari. "Assessment of Hydro-chemical Processes Inducing the Groundwater Salinisation in Coastal Regions: Case Study of the Salalah Plain, Sultanate of Oman". In Water Resources in Arid Areas: The Way Forward, 351–68. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-51856-5_20.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
6

Zanchi, Camillo, e Stefano Cecchi. "Soil Salinisation in the Grosseto Plain (Maremma, Italy): An Environmental and Socio-Economic Analysis of the Impact on the Agro-Ecosystem". In Coastal Water Bodies, 79–90. Dordrecht: Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-8854-3_5.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
7

"SALINISATION". In A Water Quality Assessment of the Former Soviet Union, 131–54. CRC Press, 1998. http://dx.doi.org/10.1201/9781482272130-10.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
8

Goudie, Andrew S. "Enhanced salinisation". In Developments in Water Science, 287–93. Elsevier, 2003. http://dx.doi.org/10.1016/s0167-5648(03)80025-4.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
9

"Salinisation of Soils". In Soil, 141–62. CRC Press, 2003. http://dx.doi.org/10.1201/9781482279955-17.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
10

"IRRIGATION INDUCED SALINISATION". In Modern Land Drainage, 269–84. CRC Press, 2004. http://dx.doi.org/10.1201/9781482283860-20.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri

Atti di convegni sul tema "Salinisation"

1

Munday, T. J., D. Sattel, A. Fitzpatrick e J. Reid. "Frequency or Time Domain HEM Systems for Defining Spatial Processes of Salinisation?" In Near Surface 2007 - 13th EAGE European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609.20146561.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
2

Fitzpatrick, A. D., e T. J. Munday. "Spatial Patterns and Processes of Floodplain and River Salinisation – Sunraysia, Victoria, Australia". In Near Surface 2007 - 13th EAGE European Meeting of Environmental and Engineering Geophysics. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609.20146570.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
3

Munday, Tim J., Fred W. Leaney e Steve Barnett. "Improved Predictions of Groundwater Salinisation in the SE of South Australia — A Case Study on the Combined Role of Geological Understanding, Geophysics and Modelling". In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2011. Environment and Engineering Geophysical Society, 2011. http://dx.doi.org/10.4133/1.3614059.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
4

Fitzpatrick, A., T. J. Munday, V. Berens e K. Cahill. "An Examination of Frequency Domain and Time Domain HEM Systems for Defining Spatial Processes of Salinisation Across Ecologically Important Floodplain Areas: Lower Murray River, South Australia". In Symposium on the Application of Geophysics to Engineering and Environmental Problems 2007. Environment and Engineering Geophysical Society, 2007. http://dx.doi.org/10.4133/1.2924623.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
5

Fitzpatrick, A., T. J. Munday, V. Berens e K. Cahill. "An Examination Of Frequency Domain And Time Domain Hem Systems For Defining Spatial Processes Of Salinisation Across Ecologically Important Floodplain Areas: Lower Murray River, South Australia". In 20th EEGS Symposium on the Application of Geophysics to Engineering and Environmental Problems. European Association of Geoscientists & Engineers, 2007. http://dx.doi.org/10.3997/2214-4609-pdb.179.01179-1186.

Testo completo
Gli stili APA, Harvard, Vancouver, ISO e altri
Ti possono interessare anche gli elenchi estesi di opere sul tema "Salinisation":
Articoli di riviste Tesi
Offriamo sconti su tutti i piani premium per gli autori le cui opere sono incluse in raccolte letterarie tematiche. Contattaci per ottenere un codice promozionale unico!

Vai alla bibliografia