Journal articles: 'Hydraulic management'

1

Сазонова, Svetlana Sazonova, Мезенцев, and A. Mezentsev. "MATHEMATICAL MODELING OF HYDRAULIC SYSTEMS IN THE MANAGEMENT OF THE OPERATION AND DEVELOPMENT." Modeling of systems and processes 8, no. 1 (July 2, 2015): 60–63. http://dx.doi.org/10.12737/12025.

Full text

Abstract:

The article considers the problem of mathematical modeling of hydraulic systems: in the areas of development management and governance function of implementation. Formulated the basic priority directions of mathematical modeling pipeline hydraulics.

APA, Harvard, Vancouver, ISO, and other styles

2

Kang, Wen Long, and Yang Wang. "Diagnosis and Management of the Polluted Hydraulic Oil." Advanced Materials Research 619 (December 2012): 447–50. http://dx.doi.org/10.4028/www.scientific.net/amr.619.447.

Full text

Abstract:

Hydraulic technology is widely applied in various fields of national economy, so the performance of hydraulic system directly influences all aspects of the economic benefits. The status of hydraulic oil is important for the working performance of hydraulic system.The pollution of hydraulic oil is a reason，which causes the fault of hydraulic system And it will cause the failure of system and loss of benefit. So it's very important that the fault of hydraulic system be diagnosed and treated. This paper introduces hydraulic oil pollution and the method of diagnosing and treating it.

APA, Harvard, Vancouver, ISO, and other styles

3

Berardi, L., and O. Giustolisi. "Calibration of Design Models for Leakage Management of Water Distribution Networks." Water Resources Management 35, no. 8 (May 26, 2021): 2537–51. http://dx.doi.org/10.1007/s11269-021-02847-x.

Full text

Abstract:

AbstractWater losses in urban water distribution networks (WDN) accelerate the deterioration of such infrastructures. The enhanced hydraulic modelling provides a phenomenological representation of WDN hydraulics, including the modelling of leakages as function of pipe average pressure and deterioration. The methodological use of such models on real WDN was demonstrated to support the planning of leakage management actions. Nonetheless, many water utilities are still in the process of designing flow/pressure monitoring, thus data available are not enough to perform detailed calibration of such models.This work presents a physically based approach for the calibration of WDN hydraulic models aimed at supporting leakage management plans since early stages. The proposed procedure leverages the key role of mass balance in enhanced hydraulic models and the technical insight on pipe deterioration mechanisms for various quantity and quality of available data. Two calibration studies of real WDNs demonstrate the feasibility of the approach and show that the distribution of leakages in the WDN does not much influence the pressure values, which confirms the need for flow measurements at monitoring districts for leakage and asset management.

APA, Harvard, Vancouver, ISO, and other styles

4

Khatibi, Rahman H. "Systemic knowledge management in hydraulic systems: II. Application to hydraulic systems." Journal of Hydroinformatics 5, no. 2 (March 1, 2003): 141–53. http://dx.doi.org/10.2166/hydro.2003.0011.

Full text

Abstract:

‘Systemic knowledge management’, presented in Paper I as a problem-solving methodology, is applied to hydraulic systems here in Paper II. The generic context of hydraulic systems is interrelated to a body of similar developments in science and technology through the concept of paradigms. The systemic component of this problem-solving method integrates ‘holism’ with ‘reductionism’. Systems science approaches offer a problem-solving methodology to decompose complexities into hierarchies. The knowledge management component is implemented through (i) categorising complexities at each hierarchy for customisation of solutions, (ii) challenging the underlying assumptions; and (iii) reorganising complexities as a way of adapting to subsequent changes. This paper contributes towards the substantiation of the postulate on the formation of paradigms and their subsequent shifts. The main focus of this paper is to illustrate the potentials of applying systemic knowledge management to hydraulic systems and in particular to flood forecasting and warning.

APA, Harvard, Vancouver, ISO, and other styles

5

Li, Xuening, Guoliang Liu, Fusheng Zhang, Baoshan Guan, and Jianghe Sun. "Water management in hydraulic fracturing technology." IOP Conference Series: Earth and Environmental Science 467 (April 9, 2020): 012138. http://dx.doi.org/10.1088/1755-1315/467/1/012138.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Christensen, Bo Brahtz, Rolf Deigaard, Ida Brøker, Kasper Kærgaard, Asger Bendix Hansen, Nils Drønen, Anders Helkjær, and Helge Gravesen. "THE EXPANSION OF THE PORT OF HANSTHOLM – THE FUTURE CONDITIONS FOR A BYPASS HARBOUR." Coastal Engineering Proceedings 1, no. 33 (October 18, 2012): 41. http://dx.doi.org/10.9753/icce.v33.management.41.

Full text

Abstract:

As part of the investigations for a major expansion of the Port of Hanstholm a series of hydraulic studies were carried out involving: field measurements of waves and currents, establishment of design conditions for waves and currents, analysis of the wave disturbance, laboratory tests of breakwater stability, analysis of the future conditions for sediment bypass and sedimentation and possible impact on the surrounding coastlines. In this paper the extensive sediment studies made by application of numerical modelling is described.

APA, Harvard, Vancouver, ISO, and other styles

7

Labrujere, Astrid Louise, and Henk Jan Verhagen. "ANALYSIS OF THE CARBON FOOTPRINT OF COASTAL PROTECTION SYSTEMS." Coastal Engineering Proceedings 1, no. 33 (December 28, 2012): 78. http://dx.doi.org/10.9753/icce.v33.management.78.

Full text

Abstract:

When calculating the Carbon Footprint for a product or service, a direct link is made between the total amount of consumed energy and the produced amount of carbon dioxide during production. For that reason calculating the carbon footprint of various alternatives is a very straightforward method to compare energy consumption and more importantly environmental pollution. Applying this method to large hydraulic engineering projects is not being done frequently. In this study the possibilities to apply the Carbon Footprint method to coastal protection systems have been explored and analyzed. The analyses are based on a case study: A reinforcement work at the Dutch coast.

APA, Harvard, Vancouver, ISO, and other styles

8

Yayat Hidayat, Wahyu Purwakusuma, Enni Dwi Wahjunie, Dwi Putro Tejo Baskoro, Latief Mahir Rachman, Sri Malahayati Yusuf, Ratu Maulida Adawiyah, Imam Syaepudin, M. Mukmin R. Siregar, and Dien Ayuni Isnaini. "Characteristics of Soil Hydraulic Conductivity in Natural Forest, Agricultural Land, and Green Open Space Area." Jurnal Pengelolaan Sumberdaya Alam dan Lingkungan (Journal of Natural Resources and Environmental Management) 12, no. 2 (July 5, 2022): 352–62. http://dx.doi.org/10.29244/jpsl.12.2.352-362.

Full text

Abstract:

Soil hydraulic conductivity is one of the important soil characteristics that determines the amount and proportion of water that will be infiltrated into the soil column and flowing as surface runoff. It is strongly influenced by soil porosity and soil characteristics that affect the soil porosity such as soil texture and structure and soil organic matter content (internally factors) as well as land management and the intensity of plant canopy cover (external factors). This research is aimed to identify the character of soil hydraulics conductivity in different landuse that consist of forest, agricultural land (moor land, cacao plantations, intensive and conservation annual crops), and green open space areas. The results showed that: a) forest conversion into agricultural land led to the decline of soil quality such as decreased levels of soil organic matter, soil porosity and distribution of soil pores so that the conversion of forest land into agricultural land decreases the soil hydraulic conductivity of both for the initial value and saturated hydraulic conductivity; b) forets canopy cover density affects the soil quality and soil hydraulics conductivity, where high canopy cover has the higher value of soil hydraulics conductivity compared to medium and low canopy forest; c) Situgede tourism forest has the lowest soil hydraulics conductivity compared to other forest types; d) soil hydraulics conductivity in conservation annual crops is higher than intensive annual crops land and Situgede tourism forest and it’s not significantly different from the soil hydraulics conductivity in low canopy forest; and e) soil hydraulics conductivity in green open spaces area were strongly determined by the naturalness of landscape and human intervention level on its formation and management, where the UI city forest and Lembah Gurame city park which were function as ecotourism areas has the lower soil hydraulics conductivity compared to great forest park.

APA, Harvard, Vancouver, ISO, and other styles

9

Alleyne, Andrew, Timothy Deppen, Jonathan Meyer, and Kim Stelson. "Enery management in Mobile Hydraulics." Mechanical Engineering 135, no. 06 (June 1, 2013): S4—S6. http://dx.doi.org/10.1115/1.2013-jun-5.

Full text

Abstract:

This paper explores research into hydraulic hybrids that span a wide range of applications from heavy-duty vehicles, such as city buses, to small passenger vehicles. This case study also highlights the importance of having a well-designed energy management strategy if one is to maximize benefit of the hybrid powertrain. There is potential for hydraulic hybrid vehicles to offer a cost-effective solution to the need for increased efficiency in transportation systems. The high-power density of fluid power makes it a natural choice for energy storage in urban driving environments where there are frequent starts/stops and large acceleration/braking power demands. Because the opportunities and challenges of fluid power are different than those of electrical power, unique control strategies are needed and a summary of common energy management strategies (EMS) design methods for hydraulic hybrids has been presented.

APA, Harvard, Vancouver, ISO, and other styles

10

Li, Hua, and Gui Qin Shang. "Hydraulic Construction Safety Management Model Research Based on Knowledge Management." Applied Mechanics and Materials 357-360 (August 2013): 2896–99. http://dx.doi.org/10.4028/www.scientific.net/amm.357-360.2896.

Full text

Abstract:

The targeted and scientific strategies of safety management are badly in need and its owing to the different characteristic of the complexion in construction environment, technology and constructors. In order to build a construction safety knowledge management that based on construction process through brings the methods of knowledge into the construction site. Finally analysis the main process parts of intellectual resources to realize the safety goals and improve the safety management.

APA, Harvard, Vancouver, ISO, and other styles

11

Thomas, G. M., J. F. Morgan, M. J. Gefell, and J. Shi. "MGP NAPL management using hydraulic gradient modification." Land Contamination & Reclamation 14, no. 2 (April 1, 2006): 639–44. http://dx.doi.org/10.2462/09670513.743.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

El-Sayed, Tamer A., and Amr A. Abdel Fatah. "Performance of hydraulic turbocharger integrated with hydraulic energy management in SWRO desalination plants." Desalination 379 (February 2016): 85–92. http://dx.doi.org/10.1016/j.desal.2015.10.013.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Ciullo, Alessio, Karin M. De Bruijn, Jan H. Kwakkel, and Frans Klijn. "Systemic Flood Risk Management: The Challenge of Accounting for Hydraulic Interactions." Water 11, no. 12 (November 29, 2019): 2530. http://dx.doi.org/10.3390/w11122530.

Full text

Abstract:

Rivers typically flow through multiple flood-protected areas which are clearly interconnected, as risk reduction measures taken at one area, e.g., heightening dikes or building flood storage areas, affect risk elsewhere. We call these interconnections ‘hydraulic interactions’. The current approach to flood risk management, however, neglects hydraulic interactions for two reasons: They are uncertain and, furthermore, considering them would require the design of policies not only striving for risk reduction, but also accounting for risk transfers across flood-protected areas. In the present paper, we compare the performance of policies identified according to the current approach with those of two alternative formulations: One acknowledging hydraulic interactions and the other also including an additional decision criterion to account for equity in risk distribution across flood-protected areas. Optimal policies are first identified under deterministic hydraulic interactions, and, next, they are stress-tested under uncertainty. We found that the current approach leads to a false sense of equal risk distribution. It does, however, perform efficiently when a risk-averse approach towards uncertain hydraulic interactions is taken. Accounting for hydraulic interactions in the design of policies, instead, increases efficiency and both efficiency and equity when hydraulic interactions are considered deterministically and as uncertain, respectively.

APA, Harvard, Vancouver, ISO, and other styles

14

Zhao, Si Hai, Yu Wei Hu, Zhe Qian Zhao, Yan Chen Guo, Ji Ye Gao, and Peng Chao Zhong. "The Application of RFID at Leasing Management of Coal Mining Equipments." Advanced Materials Research 774-776 (September 2013): 1647–52. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.1647.

Full text

Abstract:

Giving each hydraulic prop sets of the only equipment number is a problem of the management of coal mining equipments, the article has presented a method of using RFID technology to affix with a electronic tag for each hydraulic prop, through theoretical analysis and experimental research, basing on the equipment identification and identification distance reliability, confirm that the low frequency RFID electronic tags can be used as a hydraulic prop, and design the installation method of the hydraulic prop RFID chip. The paper also uses the C language compiled a RFID chips identification and transmission program, and use the RFID application system in the actual equipments leasing management information system.

APA, Harvard, Vancouver, ISO, and other styles

15

Mitsui, Jun, Shin-ichi Ogata, Sanae Shibata, Akira Matsumoto, and Masato Yamamoto. "BEHAVIOR OF FISH REEF BLOCKS FALLING THROUGH WATER." Coastal Engineering Proceedings 1, no. 33 (September 28, 2012): 38. http://dx.doi.org/10.9753/icce.v33.management.38.

Full text

Abstract:

An accurate and economical placement method for fish reef blocks utilizing free fall in the deep sea area is presented in this paper. Falling behavior of concrete blocks in water was investigated by hydraulic model experiments and 3-D numerical computations. As a result, a new fish reef block which falls through water with highly stable behavior was developed. The distribution range of the developed block on the sea bottom was predicted by a stochastic model and it was proved to be sufficiently narrow. In addition, a quick estimation method for the placement position was developed to determine the release point of the block in actual construction. By using hydrodynamic force coefficients to evaluate the forces acting on the block, the method can estimate the falling behavior of the block in a flow field with sufficient accuracy and in a short time.

APA, Harvard, Vancouver, ISO, and other styles

16

Heijer, C. (Kees) Den, Dirk T. J. A. Knipping, Nathaniel G. Plant, Jaap S. M. Van Thiel de Vries, Fedor Baart, and Pieter H. A. J. M. Van Gelder. "IMPACT ASSESSMENT OF EXTREME STORM EVENTS USING A BAYESIAN NETWORK." Coastal Engineering Proceedings 1, no. 33 (October 25, 2012): 4. http://dx.doi.org/10.9753/icce.v33.management.4.

Full text

Abstract:

This paper describes an investigation on the usefulness of Bayesian Networks in the safety assessment of dune coasts. A network has been created that predicts the erosion volume based on hydraulic boundary conditions and a number of cross-shore profile indicators. Field measurement data along a large part of the Dutch coast has been used to train the network. Corresponding storm impact on the dunes was calculated with an empirical dune erosion model named duros+. Comparison between the Bayesian Network predictions and the original duros+ results, here considered as observations, results in a skill up to 0.88, provided that the training data covers the range of predictions. Hence, the predictions from a deterministic model (duros+) can be captured in a probabilistic model (Bayesian Network) such that both the process knowledge and uncertainties can be included in impact and vulnerability assessments.

APA, Harvard, Vancouver, ISO, and other styles

17

Shin, Bumshick, and Kyu-Han Kim. "TIDAL POWER GENERATION IN GAROLIM BAY, KOREA." Coastal Engineering Proceedings 1, no. 33 (December 14, 2012): 70. http://dx.doi.org/10.9753/icce.v33.management.70.

Full text

Abstract:

Among the ocean energy, tidal power generation has a great advantage on large development possibilities despite of its huge construction cost and difficulty in finding an applicable location. Furthermore, once tidal power generation is developed, various developmental benefits are expected which are not only producing semi-permanent energy but also gaining a bridge role, tourism resource effects, adjustability of flood inundation inside the bay and other multi development effects(Roger H. Charlier.,2003, John Twidell, 2006). Nevertheless, unfavorable impacts on the bay environmental have also been pointed out. The environmental problems include mud flat extinction and marine eco-system disruption. The participation of local residents is essential to resolve ecological and socioeconomic issues. In this study, the feasibility of tidal power generation is examined by reviewing the hydraulic characteristics of a target area in the Garorim bay on the west coast of Korea.

APA, Harvard, Vancouver, ISO, and other styles

18

Lizondo, Susana, Kevin Barry, Joshua Reilly, Julie Ascoop, Howard Neil Southgate, Matilda Kitou, Daniel Walsh, Steve Lahiffe, and Tom Tiernan. "MULTIDISCIPLINARY APPROACH FOR THE ASSESSMENT OF COASTAL RISKS AT CLOUGHANINCHY (WEST COAST OF IRELAND)." Coastal Engineering Proceedings, no. 35 (June 23, 2017): 7. http://dx.doi.org/10.9753/icce.v35.management.7.

Full text

Abstract:

The purpose of this paper is to present the multidisciplinary approach adopted to undertake a detailed coastal flood and erosion risk management investigation at Cloughaninchy beach (Ireland). The site was severely affected by a series of extreme events with extreme high tide combined with a severe sea swell and onshore winds resulting in severe damage due to flooding and wave action as well as substantial retreat of the dune system. Based on a comprehensive assessment and multidisciplinary studies an appropriate plan was subsequently developed to best manage the risks identified and to further assess the feasibility of the recommended management plan options and measures. The project is an example of how vital the integration of specialized disciplines (coastal engineering, hydraulic flood modelling and coastal morphology) is in the determination of the appropriate protection measures for coastal sites.

APA, Harvard, Vancouver, ISO, and other styles

19

Armand, Hooman, Ivan Stoianov, and Nigel Graham. "Impact of network sectorisation on water quality management." Journal of Hydroinformatics 20, no. 2 (October 11, 2017): 424–39. http://dx.doi.org/10.2166/hydro.2017.072.

Full text

Abstract:

Abstract The sectorisation of water supply networks (WSNs) includes the permanent closure of valves in order to achieve a cost-effective leakage management and simplify pressure control. The impact of networks sectorisation, also known as district metered areas (DMAs), on water quality and discolouration has not been extensively studied and it remains unknown. In addition, hydraulic variables used in the literature for assessing the likelihood of potential discolouration are limited and inconclusive. This paper investigates a methodology to evaluate the impact of networks sectorisation (DMAs) on water quality and the likelihood of discolouration incidents. The methodology utilises a set of surrogate hydraulic variables and an analysis of the hydraulic condition in pipes with historic discolouration complaints. The proposed methodology has been applied to a large-scale WSN, with and without sectors, in order to assess the potential impact of DMAs on water quality. The results demonstrate that the sectorisation of WSN (DMAs) could compromise the overall water quality and increase the likelihood of discolouration incidents. The results of this study and the proposed surrogate hydraulic variables facilitate the formulation of optimisation problems for the re-design and control of WSNs with sectorised topologies.

APA, Harvard, Vancouver, ISO, and other styles

20

Wang, Cheng Long, Qing Liang Zeng, Zhi Hai Liu, and Xiao Wang Wu. "Hydraulic Support Development Based on Virtual Prototype Collaborative Development Platform." Advanced Materials Research 201-203 (February 2011): 1408–11. http://dx.doi.org/10.4028/www.scientific.net/amr.201-203.1408.

Full text

Abstract:

In this paper, based on virtual prototype Collaborative Development Platform for Hydraulic support, a new technology way to the design and study of the mining hydraulic support is provided.The function constitute of the platform which can support the whole multi-disciplinary collaborative development procedure of Hydraulic support are given. The Development of Hydraulic support based on virtual prototype Collaborative Development Platform is given, which includes the following key steps: Team member management modeling, Process management modeling and Co-simulation. The development of hydraulic support shows the effectiveness of the virtual prototype collaborative development for hydraulic support.

APA, Harvard, Vancouver, ISO, and other styles

21

YANISHEVSKYY, Vasyl. "ANALYSIS AND IMPROVEMENT OF THE AUTOMATED MANAGEMENT SYSTEM OF TECHNOLOGICAL PROCESSES OF AGRO-INDUSTRIAL COMPLEX." Herald of Khmelnytskyi National University 303, no. 6 (December 2021): 128–31. http://dx.doi.org/10.31891/2307-5732-2021-303-6-128-131.

Full text

Abstract:

The article considers the results of qualimetric examination of methods of technical diagnostics of hydraulic systems. The theoretical analysis of methods of technical diagnostics of hydraulic systems is carried out, where their characteristics were studied and the advantages and disadvantages of each method from the list are considered. Also, the criteria that guide the choice of a method of diagnostics of hydraulic systems were determined, a matrix of evaluations of experts to assess the informativeness of methods of technical diagnostics of hydraulic systems. The results of the examination on the criterion “signal / noise” were processed. Thus, according to the results of expert evaluation, the most preferred methods for the diagnosis of hydraulic systems are: the method of diagnosis by the parameters of the working fluid, temporal, vibroacoustic and thermal methods. Use of the chosen diagnostic methods will allow to estimate precisely a technical condition of hydraulic system and its residual technical resource. The classification of methods of technical diagnostics of hydraulic systems on the basis of which the comparative analysis of these methods is executed is presented. Mathematical procedures for processing the matrix of expert estimates using the signal-to-noise criterion are also considered. Based on the results of evaluation of diagnostic methods of hydraulic systems of technological equipment for various purposes using the criterion “signal / noise” a certain combination of methods can be formed, which will be optimal for assessing the technical condition of hydraulic system of a particular technological machine.

APA, Harvard, Vancouver, ISO, and other styles

22

Makovetsky, B. I., P. M. Sankov, R. B. Papirnyk, N. O. Tkach, and I. V. Trifonov. "Management of the technical condition of hydraulic structures." IOP Conference Series: Materials Science and Engineering 1021 (January 20, 2021): 012022. http://dx.doi.org/10.1088/1757-899x/1021/1/012022.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Tukker, M., K. Kooij, and I. Pothof. "Hydraulic Design and Management of Wastewater Transport Systems." Water Intelligence Online 15 (April 6, 2016): 9781780407814. http://dx.doi.org/10.2166/9781780407814.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Lourenço, S. V., and M. I. Ferreira. "Exploring hydraulic redistribution for water management in gardens." Acta Horticulturae, no. 1279 (June 2020): 97–102. http://dx.doi.org/10.17660/actahortic.2020.1279.14.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Pardo-Bosch, Francesc, and Antonio Aguado. "Investment priorities for the management of hydraulic structures." Structure and Infrastructure Engineering 11, no. 10 (October 9, 2014): 1338–51. http://dx.doi.org/10.1080/15732479.2014.964267.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Dusa, Petru, Eugen Purice, Radu Lupascu, Iustina Ripanu, and Gabriel Fandarac. "Configuring a system for hydraulic oil contamination management." MATEC Web of Conferences 178 (2018): 04008. http://dx.doi.org/10.1051/matecconf/201817804008.

Full text

Abstract:

Through contamination, we can understand anything foreign to a hydraulic system. In this paper we only refer to particle contamination. Analyzing and optimizing processes with regard to component cleanliness and fluid purity is the target of contamination management. The paper proposes a conceptual installation solution for the use of particle counters in order to optimize the measurement process. There is also a way of using the facility within a contamination management system.

APA, Harvard, Vancouver, ISO, and other styles

27

Boller, M. "Towards sustainable urban stormwater management." Water Supply 4, no. 1 (February 1, 2004): 55–65. http://dx.doi.org/10.2166/ws.2004.0007.

Full text

Abstract:

New directives for the management of urban stormwater prioritize infiltration and direct discharge into receiving waters. This requires innovative new stormwater facilities in urban areas. Besides hydraulic requirements for retention and infiltration capacity, the pollutants contained in the runoff water are of primary importance in future stormwater drainage concepts. Different urban surfaces are classified according to their potential for pollutant wash-off and the most crucial substances in view of hazardous effects in the aquatic and terrestrial environment are identified. Source control of hazardous pollutants by choosing alternative materials for the construction of buildings, roads and vehicles is considered to be most sustainable but will only be effective on a longterm perspective. In addition, new facilities for decentralized hydraulic retention combined with barrier systems for the most hazardous substances are proposed allowing for ecologically safe discharge of the stormwater into the local environment. Soil passage and new adsorber systems in the form of different granular adsorbents have been investigated and turned out to represent efficient retention systems which can well be integrated into infiltration and hydraulic retention facilities. It is suggested that the structures for stormwater handling are integrated into local landscaping in the surrounding of buildings in the form of ponds, reed-beds, ditches, etc. creating attractive blue-green environments.

APA, Harvard, Vancouver, ISO, and other styles

28

Feng, Yuan, and Chao Yin Feng. "Risk Management of Induced Micro-Seismicity Caused by Hydraulic Fracturing through Acoustic Emission." Advanced Materials Research 734-737 (August 2013): 628–33. http://dx.doi.org/10.4028/www.scientific.net/amr.734-737.628.

Full text

Abstract:

To release the shale gas potential in China, hydraulic fracturing technologies play an important role. However, the latent technique risk deserves special attention. For example, the site-nearby micro-seismicity may have some relationship with the hydraulic fracturing. Nonetheless, the good news is that carbon dioxide stimulation can be used to displace hydraulic fracturing and obviate the potential earthquake risk. But the carbon dioxide methods are not economical nowadays, and hydraulic fracturing will continue to dominate. Through acoustic emission monitor, the reservoir characteristics and induced micro-seismicity magnitude and frequency will be collected and evaluated. Based on pre-existing project experience and numerical simulation, difference assessment standards about the hydraulic fracturing parameters are proposed to evaluate the micro-seismicity risk. Combined with other characteristics of rock property and fault location, this risk management can be used to guide the subsequent drilling and mining in practice.

APA, Harvard, Vancouver, ISO, and other styles

29

Gruhn, Angelika, Dörte Salecker, Peter Fröhle, Holger Schüttrumpf, and Frank Thorenz. "ASSESSMENT OF HYDRAULIC LOADS AND DERIVATION OF FAILURE PROBABILITIES AS A BASIS FOR THE DEERMINATION OF FRAGILITY CURVES FOR FLOOD DEFENCE DUNES." Coastal Engineering Proceedings 1, no. 33 (December 14, 2012): 63. http://dx.doi.org/10.9753/icce.v33.management.63.

Full text

Abstract:

Low lying coastal areas have always been preferred settlement areas as well as trading and industrial areas. Unfortunately, those areas are strongly endangered by extreme storm surges. In the event of a flood defence failure, protected areas are flooded and damages have to be expected. For the assessment and management of flood risk, the European Union approved the “Directive of the European Parliament and the Council on the assessment and management of flood risk”. As one part of a risk and damage analysis the risk of flooding - being the product of failure probability of a certain flood defence and the damages resulting from a failure of this flood defence - has to be determined. One possibility for the assessment of the failure probability is provided by fragility curves. A method for the derivation of fragility curves for flood defence dunes is described. Hence, the applied dune erosion model as well as the method for the derivation of the required input data is explained. Furthermore, first results of the calculation of failure probabilities and fragility curves are presented.

APA, Harvard, Vancouver, ISO, and other styles

30

Singh, Pushpendra Kumar, Pankaj Dey, Sharad Kumar Jain, and Pradeep P. Mujumdar. "Hydrology and water resources management in ancient India." Hydrology and Earth System Sciences 24, no. 10 (October 5, 2020): 4691–707. http://dx.doi.org/10.5194/hess-24-4691-2020.

Full text

Abstract:

Abstract. Hydrologic knowledge in India has a historical footprint extending over several millenniums through the Harappan civilization (∼3000–1500 BCE) and the Vedic Period (∼1500–500 BCE). As in other ancient civilizations across the world, the need to manage water propelled the growth of hydrologic science in ancient India. Most of the ancient hydrologic knowledge, however, has remained hidden and unfamiliar to the world at large until the recent times. In this paper, we provide some fascinating glimpses into the hydrological, hydraulic, and related engineering knowledge that existed in ancient India, as discussed in contemporary literature and revealed by the recent explorations and findings. The Vedas, particularly, the Rigveda, Yajurveda, and Atharvaveda, have many references to the water cycle and associated processes, including water quality, hydraulic machines, hydro-structures, and nature-based solutions (NBS) for water management. The Harappan civilization epitomizes the level of development of water sciences in ancient India that includes construction of sophisticated hydraulic structures, wastewater disposal systems based on centralized and decentralized concepts, and methods for wastewater treatment. The Mauryan Empire (∼322–185 BCE) is credited as the first “hydraulic civilization” and is characterized by the construction of dams with spillways, reservoirs, and channels equipped with spillways (Pynes and Ahars); they also had an understanding of water balance, development of water pricing systems, measurement of rainfall, and knowledge of the various hydrological processes. As we investigate deeper into the references to hydrologic works in ancient Indian literature including the mythology, many fascinating dimensions of the Indian scientific contributions emerge. This review presents the various facets of water management, exploring disciplines such as history, archeology, hydrology and hydraulic engineering, and culture and covering the geographical area of the entire Indian subcontinent to the east of the Indus River. The review covers the period from the Mature Harappan Phase to the Vedic Period and the Mauryan Empire.

APA, Harvard, Vancouver, ISO, and other styles

31

Hankin, Barry, Peter Metcalfe, Keith Beven, and Nick A. Chappell. "Integration of hillslope hydrology and 2D hydraulic modelling for natural flood management." Hydrology Research 50, no. 6 (July 17, 2019): 1535–48. http://dx.doi.org/10.2166/nh.2019.150.

Full text

Abstract:

Abstract Natural flood management (NFM) has recently invigorated the hydrological community into redeploying its process understanding of hydrology and hydraulics to try to quantify the impacts of many distributed, ‘nature-based’ measures on the whole-catchment response. Advances in spatial data analysis, distributed hydrological modelling and fast numerical flow equation solvers mean that whole-catchment modelling including computationally intensive uncertainty analyses are now possible, although perhaps the community has not yet converged on the best overall parsimonious framework. To model the effects of tree-planting, we need to understand changes to wet canopy evaporation, surface roughness and infiltration rates; to model inline storage created by ‘leaky barriers’ or offline storage, we need accurate channel hydraulics to understand the changes to attenuation; to model the complex behaviour of the whole network of NFM measures, and the possibility of flood peak synchronisation effects, we need efficient realistic routing models, linked to key flow pathways that take into account the main physical processes in soils and the antecedent moisture conditions for a range of different rainfall events. This paper presents a new framework to achieve this, based on a cascade of the Dynamic Topmodel runoff generation model and the JFlow or HEC-RAS 2D hydraulic models, with an application to the Swindale Catchment in Cumbria, UK. We demonstrate the approach to quantify both the effectiveness of a relatively large ‘runoff attenuation feature’ in the landscape and the uncertainty in the calculation given model parameter uncertainty.

APA, Harvard, Vancouver, ISO, and other styles

32

Mosley, P., and I. Jowett. "River morphology and management in New Zealand." Progress in Physical Geography: Earth and Environment 23, no. 4 (December 1999): 541–65. http://dx.doi.org/10.1177/030913339902300405.

Full text

Abstract:

River research in New Zealand is strongly conditioned by management requirements defined by environmental legislation. Principal areas of investigation at present include information on river morphology, habitat and instream flows required for management of fluvial ecosystems; erosion, sediment transport and sediment yield; and gravel-bedded and braided river processes. Research in these areas has tended to have a strong orientation towards field observations as a basis for developing quantitative (commonly statistical) models, and ultimately the provision of guidance material and decision support systems for resource managers. A fourth area of particular emphasis has been channel networks and hydraulic geometry. Again, the work generally has been field-intensive, but has been directed towards testing models such as the optimal channel network concept. Current research directions are focusing particularly on gravel-bed river mechanics, climatic and tectonic controls on landscape evolution, and instream habitat hydraulics and ecosystems.

APA, Harvard, Vancouver, ISO, and other styles

33

Martinho, Nuno, José-Paulo de Almeida, Nuno E. Simões, and Alfeu Sá-Marques. "UrbanWater: Integrating EPANET 2 in a PostgreSQL/PostGIS-Based Geospatial Database Management System." ISPRS International Journal of Geo-Information 9, no. 11 (October 22, 2020): 613. http://dx.doi.org/10.3390/ijgi9110613.

Full text

Abstract:

Incorporating data stored in a geographical information system (GIS) within the development of hydraulic simulation models is crucial for operating, updating, and hence redesigning water supply systems (WSS). Building and updating hydraulic models can be both time and resource consuming; moreover, the need to update infrastructure cadastral information makes the model itself outdated. In addition, typical dispersion of data across several databases requires extra effort to maintain the whole system and ensure it is properly assembled. Albeit there are some GIS-based hydraulic modelling solutions available, they typically use external connections to assemble all components resulting in additional costs and less flexibility. In order to be able to establish a single fully integrated data model towards global characterization of a WSS and associate hydraulic simulation, this paper proposes the specific implementation of an EPANET 2 model in PostgreSQL along with PostGIS extension. The system developed enables the construction of the model, hydraulic simulation, and storage of results within a single database. Required procedures and functions were coded either in pgSQL or Python and their execution were carried out using SQL statements. Finally, a case study was selected in order to test the system proposed. Results show that an integrated approach indeed allows the expedited creation of more realistic hydraulic models based on the stored cadastral information.

APA, Harvard, Vancouver, ISO, and other styles

34

Lagerev, A. V., and E. A. Lagereva. "Optimal management of technical risk in design of hoisting apparatus hydraulic transmission." Izvestiya MGTU MAMI 9, no. 3-1 (February 10, 2015): 60–66. http://dx.doi.org/10.17816/2074-0530-67198.

Full text

Abstract:

The problem of constrained non-linear technical and economical optimization of maintenance the acceptable technical risk during operation of hoisting apparatus hydraulic transmission was for-mulated. It was solved through optimal choice of reliability level of individual hydraulic units.

APA, Harvard, Vancouver, ISO, and other styles

35

Le Coustumer, S., T. D. Fletcher, A. Deletic, and S. Barraud. "Hydraulic performance of biofilters for stormwater management: first lessons from both laboratory and field studies." Water Science and Technology 56, no. 10 (November 1, 2007): 93–100. http://dx.doi.org/10.2166/wst.2007.735.

Full text

Abstract:

In order to improve knowledge on stormwater biofiltration systems, the Facility for Advancing Water Biofiltration (FAWB) was created at Monash University in Melbourne, Australia. One of the aims of FAWB is to improve hydraulic performance of biofilters, given that there are numerous cases of infiltration devices failing after a few years of operation. Experiments were conducted in the field to evaluate the performance of existing systems, and in the lab to understand the factors that influence hydraulic behavior over time. The field experiments show that 43% of tested systems are below nominal Australian guidelines for hydraulic conductivity. The preliminary lab results show a decrease in hydraulic conductivity during the first weeks of operation (μ=66% reduction), although most remain within acceptable limits. Influences of the size of the biofilter relative to its catchment and the importance of the type of media, on the evolution of hydraulic conductivity, are examined.

APA, Harvard, Vancouver, ISO, and other styles

36

Stump, Patrick, Nathan Keller, and Andrea Vacca. "Energy Management of Low-Pressure Systems Utilizing Pump-Unloading Valve and Accumulator." Energies 12, no. 23 (November 21, 2019): 4423. http://dx.doi.org/10.3390/en12234423.

Full text

Abstract:

In the context of improving energy efficiency and fuel consumption of mobile hydraulic equipment, it is important to analyze all the sources of power loss occurring within the hydraulic systems. While plenty of analyses have been performed on the working implements and the main transmission systems, very little attention has been paid to low-pressure (LP) systems until recently. LP systems are required on closed-circuit hydraulic systems to replenish losses, provide cooling flow, and maintain a pilot pressure necessary to operate hydraulic control valves and variable displacement units. It is shown that these circuits, which are often thought to have minimal impact on power consumption, actually cause significant, continuous power loss. A new method of power savings in these circuits is investigated through management of charge pump flow by application of an accumulator-sense pump-unloading (ASPU) valve. This work further proposes the combination of a split LP architecture with an ASPU valve. Three systems are simulated using Simcenter Amesim® and MATLAB/Simulink®. Using realistic duty cycles and unit loss models on a circuit for mobile off-road hydraulic equipment, it is shown that a standard LP system can consume about 5 kW of power. Power savings of up to 65% over a standard LP system are demonstrated by the proposed architecture.

APA, Harvard, Vancouver, ISO, and other styles

37

Cai, Hou Qing. "Hydraulic Construction Project Safety Management: A Human Side Perspective." Applied Mechanics and Materials 357-360 (August 2013): 2460–63. http://dx.doi.org/10.4028/www.scientific.net/amm.357-360.2460.

Full text

Abstract:

Through analyzing the causes of safety accidents in hydraulic construction projects, this article argues that the main direct causes of safety accidents are working against regulation, commanding against regulation and ineffective technical countermeasures. However, the deep reasons are mainly human side factors: people are usually hard to keep absolute consciousness within eight working hours, and generally have such mental inclinations as subjective assuming, trying fortune, energy-saving, rebellion, etc. So, for hydraulic construction project safety management, taking account of human side factors and implementing corresponding countermeasures are fundamental.

APA, Harvard, Vancouver, ISO, and other styles

38

Jeison, D., and J. B. van Lier. "Bio-layer management in anaerobic membrane bioreactors for wastewater treatment." Water Science and Technology 54, no. 2 (July 1, 2006): 81–86. http://dx.doi.org/10.2166/wst.2006.489.

Full text

Abstract:

Membrane separation technology represents an alternative way to achieve biomass retention in anaerobic bioreactors for wastewater treatment. Due to high biomass concentrations of anaerobic reactors, cake formation is likely to represent a major cause of flux decline. In the presented research, experiments are performed on the effect of biomass concentration and level of gas sparging on the hydraulic capacity of a submerged anaerobic membrane bioreactor. Both parameters significantly affected the hydraulic capacity, with biomass exerting the most pronounced effect. After 50 days of continuous operation the critical flux remained virtually unchanged, despite an increase in membrane resistance, suggesting that biomass characteristics and hydraulic conditions determine the bio-layer formation rather than the membrane's fouling level. The concept of bio-layer management is introduced to describe the programmed combination of actions performed in order to control the formation of biomass layer over membranes.

APA, Harvard, Vancouver, ISO, and other styles

39

Shuai, Qing Yan, and Ya Bo He. "Study on the Design of Project Controlling Information Management System for Large-Scale Hydraulic Engineering." Advanced Materials Research 671-674 (March 2013): 3130–33. http://dx.doi.org/10.4028/www.scientific.net/amr.671-674.3130.

Full text

Abstract:

Project controlling information management system (PCIMS) is an important management facility and means for the construction of large-scale hydraulic engineering. Based on the analysis of construction management features for large-scale hydraulic engineering, the general design goal of PCIMS is put forward. The structure of PCIMS for large-scale hydraulic engineering is concretely designed and analyzed, which is consisted of five parts, including the account management module, database, input module, data processing module and output module. The key technologies in the process of developing PCIMS are also discussed，such as the technology of data warehouse, the real-time technology of the system and the comprehensive integration technology of various components. Due to the establishment of PCIMS for large-scale hydraulic engineering, a convenient information interaction platform is provided for all the project participants. As a result, the accuracy and timeliness of the information exchange is improved, that is benefit for the owners to make correct decision.

APA, Harvard, Vancouver, ISO, and other styles

40

Lemieux, Jean-Michel, Donna Kirkwood, and René Therrien. "Fracture network analysis of the St-Eustache quarry, Quebec, Canada, for groundwater resources management." Canadian Geotechnical Journal 46, no. 7 (July 2009): 828–41. http://dx.doi.org/10.1139/t09-022.

Full text

Abstract:

A detailed structural survey has been conducted on a fractured sedimentary rock formation in the St-Eustache quarry, Quebec, Canada, to supplement a hydrogeological study. The two main types of discontinuities in the quarry are horizontal bedding planes and vertical joints. The fracture network is classified as a stratabound network that could be considered as an equivalent porous medium (EPM) for groundwater flow for a volume of rock of 25 to 100 m3. Using detailed statistical data of the fracture network, a geometric model is used to infer a range of hydraulic conductivity values for the low permeability fractures not directly measured with hydraulic tests and treated as EPM for their interpretation. This analysis shows that the vertical and horizontal fractures have about the same permeability in the rock mass, except for a few high hydraulic-conductivity bedding planes. Hydraulic conductivity of single fractures ranges between 1.7 × 10−3 and 1.7 × 10−1 m/s. The porosity of the bulk rock mass inferred from fracture spacing measurements was found to be between 0.03% and 0.3%. Because vertical boreholes provide limited information on vertical fractures, the interpretation of hydraulic tests at the site was greatly improved by the structural surveys.

APA, Harvard, Vancouver, ISO, and other styles

41

Mallikarachchi, Thanuja, Guy Riefler, and Gayle Mitchel. "Hydraulic behavior of multi-processed manufactured best management practices." Proceedings of the Water Environment Federation 2017, no. 9 (January 1, 2017): 3427–40. http://dx.doi.org/10.2175/193864717822157900.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Hochberg, U., A. Degu, A. Fait, and S. Rachmilevitch. "Grapevines hydraulic diversity – a critical consideration for irrigation management?" Acta Horticulturae, no. 1150 (January 2017): 443–48. http://dx.doi.org/10.17660/actahortic.2017.1150.61.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Smith, Ethan T., and Harry X. Zhang. "Hydraulic Fracturing in the Context of Sustainable Water Management." Proceedings of the Water Environment Federation 2012, no. 15 (January 1, 2012): 2018–29. http://dx.doi.org/10.2175/193864712811725627.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Mischen, Pamela Ann. "Small, Local Governments and Their Management of Hydraulic Fracturing." Environmental Management 69, no. 3 (October 28, 2021): 514–28. http://dx.doi.org/10.1007/s00267-021-01551-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Angriani, Parida, Akhmad Munaya Rahman, and Karunia Puji Hastuti. "MANAGEMENT OF KUIN RIVER USING THE ECO-HYDRAULIC APPROACH." Jurnal Socius 10, no. 1 (April 15, 2021): 51. http://dx.doi.org/10.20527/jurnalsocius.v10i1.10453.

Full text

Abstract:

River management using the eco-hydraulic approach is aimed at preserving the ecological components in the river environment through hydraulic engineering. This study aims to identify the existing conditions on Kuin River border, analyze the relationship and influence of community activities on the banks of Kuin River on the water quality of Kuin River, and study the river development pattern with the concept of eco-hydraulic on Kuin River. Data were collected based on the results of field surveys and laboratory tests for water and soil. The results showed that the current condition of the riverbank of Kuin River has not fulfilled its function as a buffer space between the river and the mainland, due to the large number of community settlements rather than vegetation that functions to protect the river. Kuin River is polluted because several ecological indicators such as pH, Fe, BOD, and COD have exceeded the maximum allowable limits. This occurs due to social activities and development along the river, which have an impact on biotic and abiotic aspects of the river. The type of soil on the banks of the Kuin River is silt mixed with clay with moderate to high plasticity. Based on this condition, there is an assumption that the cliffs on the banks of Kuin River have the potential for landslides. Therefore, a pattern for developing cliff protection using riverbank vegetation components is recommended

APA, Harvard, Vancouver, ISO, and other styles

46

Olmos, Carlos Francisco García. "HYDRAULIC CONDUCTIVITY UNDER FORESTS ONE KEY FOR WATER MANAGEMENT." Journal of Engineering Research 2, no. 3 (February 11, 2022): 2–16. http://dx.doi.org/10.22533/at.ed.317232210024.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Denney, Dennis. "Hydraulic Fracturing for Reservoir ManagementHydraulic Fracturing for Reservoir Management." Journal of Petroleum Technology 54, no. 03 (March 1, 2002): 47. http://dx.doi.org/10.2118/0302-0047-jpt.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Kinzelbach, Wolfgang, and Christophe Kauffmann. "Hydraulic Measures for the Management of Partially Polluted Aquifers." Zeitschrift der Deutschen Geologischen Gesellschaft 138, no. 2 (December 1, 1987): 341–51. http://dx.doi.org/10.1127/zdgg/138/1987/341.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Çerçioğlu, Melis, Stephen H. Anderson, Ranjith P. Udawatta, and Salah Alagele. "Effect of cover crop management on soil hydraulic properties." Geoderma 343 (June 2019): 247–53. http://dx.doi.org/10.1016/j.geoderma.2019.02.027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Sprengel, Michael, and Monika Ivantysynova. "Neural network based power management of hydraulic hybrid vehicles." International Journal of Fluid Power 18, no. 2 (September 28, 2016): 79–91. http://dx.doi.org/10.1080/14399776.2016.1232117.

Full text

APA, Harvard, Vancouver, ISO, and other styles

Journal articles on the topic 'Hydraulic management'

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