Selection of a Site for a Reservoir - Water Resource Engineering 1 | Summary and Q&A

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April 19, 2022
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Selection of a Site for a Reservoir - Water Resource Engineering 1

TL;DR

Factors such as site availability, cost, geological formations, evaporation losses, and capacity should be considered when selecting a reservoir site.

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Key Insights

  • 💯 Reservoir site selection involves a trade-off between various factors, making it challenging to find a perfect site that meets all criteria.
  • 🤩 Some key factors in reservoir site selection include site availability, cost, geological formations, evaporation losses, capacity, and avoiding silt-laden tributaries.
  • 🌸 Deep reservoirs are preferable due to lower land costs, reduced evaporation losses, and weed growth.
  • 👷 The reservoir site should be well-connected for regular inspections and have nearby access to construction materials.
  • 🧂 The presence of harmful salts and the submergence of inhabited or fertile areas should also be considered.

Questions & Answers

Q: What is the main purpose of constructing a reservoir?

The main purpose of constructing a reservoir is to accumulate water by constructing a barrier across a river to ensure water availability for various uses, such as irrigation, drinking water, and hydroelectric power generation.

Q: What role does the geological formation play in reservoir site selection?

The geological formation of the reservoir banks and walls should be such that it minimizes leakage, seepage, and cracks. This helps reduce water losses and ensures the integrity and stability of the reservoir structure.

Q: How does the depth of a reservoir affect its construction and operation?

Deep reservoirs are preferred over shallow ones as they have lower land costs per unit of capacity, resulting in reduced evaporation losses and weed growth. Deep reservoirs also require less catchment area compared to shallow reservoirs for the same volume of water.

Q: Why should silt-laden tributaries be avoided in reservoir site selection?

Silt-laden tributaries should be avoided because the silt deposited by these tributaries can reduce the capacity of the reservoir over time. The accumulation of silt reduces the depth of the water, potentially affecting the water availability for various uses.

Summary & Key Takeaways

  • Reservoir site selection involves considering factors such as site availability, cost, and geological formations to minimize leakage and seepage losses.

  • The selected site should also minimize evaporation losses and promote deep reservoir construction to reduce land costs and weed growth.

  • Other considerations include adequate capacity, avoidance of silt-laden tributaries, deep narrow openings in the valley, and accessibility for construction materials and regular inspections.

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