Optimizing cascades or systems of reservoirs in small catchments
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3rd Mekong Forum on Water, Food & Energy 2013. Presentation from Session 9: Managing the impacts of dams across cascades.
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This document discusses reservoir sedimentation, including its causes and mitigation strategies. It notes that geological investigation of the land, hydrology, hydrogeology, and geology are essential for planning dams and reservoirs. Several methods to control sedimentation are described, such as reducing sediment inflow, routing sediments, sediment removal, providing large storage volumes, and sediment placement. Afforestation, check dams, and operating reservoirs to discharge sediment during floods while retaining water during dry seasons can also help address the problem. Desilting of reservoirs in India needs to be prioritized, as silt deposits have reduced water storage capacity by 30-40% in major dams.
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2. Sedimentation in reservoirs occurs as sediment particles from the watershed settle in the reservoir due to decreased flow speeds. This reduces the reservoir's storage potential and can impact downstream soil fertility and biodiversity. Assessing sedimentation is important for reservoir management.
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2012 deep research report on global and china wind turbine casting industry
2012 deep research report on global and china wind turbine casting industry
2011 deep research report on eu and china offshore wind power industry
2011 deep research report on eu and china offshore wind power industry
2011 deep research report on global and china solar wafer cutting fluid industry
2011 deep research report on global and china solar wafer cutting fluid industry
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Lecture 1-CVS 445.ppt
This document outlines the course content for CVS 445: Water Resources Engineering I. It introduces key concepts in water resources engineering like integrated water resources management, water balance, catchment planning, and legal frameworks. It also covers topics like sources of water, surface water storage, streamflow measurement, groundwater, and the role of water resources engineers in sectors like water supply, irrigation, energy, and the environment.
Lecture 1-CVS 445.ppt
This document outlines the course content for CVS 445: Water Resources Engineering I. It introduces key concepts in water resources engineering like integrated water resources management, water balance, catchment planning, and legal frameworks. It also covers topics like sources of water, surface water storage in reservoirs, streamflow measurement techniques, and groundwater. Coursework will include a fieldwork study of an integrated water project and a laboratory assessment of water quality parameters.
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This document provides information about the Watershed Management course WMA 510 at the University of Agriculture Abeokuta. It includes details about the course coordinators, content, requirements, and reading list. The course aims to teach students about watershed management principles and practices through understanding watershed hydrology, human impacts on water resources, and strategies to address problems. Integrated watershed management approaches are emphasized, recognizing the links between land and water.
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The document discusses water resource management in India. It outlines several issues with declining surface water and increasing groundwater depletion. It advocates for integrated national water resource planning and management. Key areas of focus include water conservation, allocation priorities, groundwater development, irrigation, drinking water, and flood control. The document also discusses enhancing water availability, demand management, water pricing, climate change adaptation, and conservation of river corridors and infrastructure.
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The document summarizes Massachusetts' development of a comprehensive ocean management plan as required by the 2008 Oceans Act. Key points:
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16. Abstractions/Hydromorphology
This document discusses catchment management and abstractions. It provides learning objectives on abstraction risk, impacts from abstractions, environmental flows, and potential measures. It then discusses various topics related to abstractions including risk assessment, impacts from abstractions, environmental flows, and existing and future measures for regulating abstractions. Drinking water safety plans, groundwater protection plans, and integrated catchment management are also summarized as they relate to abstraction and drinking water quality.
LANDSCAPE AS INFRASTRUCTURE: Revitalizing The Malir River Karachi.
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Optimizing cascades or systems of reservoirs in small catchments
- 2. Managing impacts of dams in cascades The results of MK3 and MK17 • Welcome and opening by Dr Bui Nam Sach • Nguyen Van Tuan - Water availability, use and trends in the Srepok River Catchment • Eric Baran - Managing fish passage through large dams - with specific example of Lower Sesan 2 • Tarek Ketelsen - Managing sediment transport in catchments and through cascades in the Sesan • Simon Tilleard - Managing flows for the environment between Upper and Lower Sesan • Jeremy Carew-Reid - Institutional challenges for managing multiple water use in cascades of dams
- 4. Last year’s MK3 presentations • Trading off hydropower potential for irrigated agriculture - an example from the Sesan river • Increasing habitat diversity in new reservoirs Creating wetlands in the drawdown of the Nam Gnouang reservoir • Flood control challenges for large hydroelectric reservoirs with an example from the Nam Theun-Nam Kadinh basin in Lao PDR
- 5. Conclusions • Multiple use of water in cascades of reservoirs is often viable • Other uses do not necessarily diminish the hydropower potential by significant amounts • The potential for multiple use of water should always be explored as part of the feasibility studies for all new dams
- 6. General Recommendations • Regulatory agencies should insist that studies be carried out to assess the potential and feasibility of multiple use options for all proposed dams • Developers should include technical, social and economic viability assessments of such multiple uses for proposed dams for example in feasibility studies and EIAs • If multiple use options are considered to be viable and environmentally and socially sound they should be incorporated into the design of new projects
- 7. • River basin managers and planners should work with developers and local agencies to explore the possibilities for multiple-use of both existing and proposed hydropower projects, irrigation and water supply reservoirs. • Operators of dams in cascade should work closely together in the coordinating water releases for flood management, irrigation water supply downstream, environmental flows and fish passage and other multiple uses of water.