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Unit -5 RESERVOIR PLANNING
The document discusses reservoir planning and gravity dams. It covers topics like reservoir investigations, site selection, zones of storage, yield and capacity calculations. It also discusses types of dams, selection of dam type and site, and forces acting on gravity dams. Gravity dams are described as structures that resist forces through their own weight. Key forces on gravity dams include water pressure, uplift pressure, earthquake pressure, and more.
In this document
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An introduction to reservoir planning, covering key aspects like investigations, site selection, and storage.
Discussion on the various purposes of dams, including irrigation, domestic water supply, hydroelectric power, flood control, and navigation.
Classification of reservoirs based on their purpose: storage, flood protection, distribution, and multipurpose.
Essentials of reservoir planning investigations, including engineering, geological, and hydrological surveys.
Factors influencing reservoir site selection, emphasizing geological conditions, leakage minimization, and capacity.
Details about different storage zones in a reservoir: useful, surcharge, dead, bank, and valley storage.
Definition of yield in reservoirs, explaining safe yield, secondary yield, and the methodology for calculating capacity.
Methodology to determine safe yield based on mass inflow curves, along with discussing reservoir sedimentation factors.
Overview of various dam types including storage, diversion, detention, and classification by hydraulic design.
Advantages and disadvantages of different dam types including gravity, arch, buttress, steel, timber, and earth dams.
Key criteria for selecting the type and site of a dam, considering topography, geology, materials, and design requirements.
Explanation of gravity dam features, forces acting upon them, and considerations regarding water, uplift, and seismic pressures.
Exploration of silt pressure, wind pressure, and recommended combinations of loads for dam design.
Summary of load combinations for dam design as per U.S.B.R and Indian Standards recommendations.
Closing remarks on reservoir planning and dam design.
