EVPP 108 Lecture Notes - Lecture 6: Lead, Saline Water, Afforestation
23 Aug 2016
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Document Summary
Lakes, ponds and reservoirs represent lentic water (stagnant) Reservoirs are made by construction of dams across rivers. Importance of lentic water: domestic and industrial irrigation, navigation, fish and water fowl habitat, flood protection, recreation, generating hydroelectricity, source of water for laundry, bathing, cattle rearing. It is the most widely used devise for storing water. They also provide a head of water for the generating hydroelectric power. The down stream flow of river can be augmented during dry periods. Construction of dams in upstream regions can check flood in the downstream region during rainy season. Creating a reservoir destroys the land within the reservoir area by flooding (this was usually very fertile land): reservoir provides more surface area for evaporation and more area for seepage. Due to more evaporation more salts gets deposited. When this water is used for irrigation the rate of salinisation of the soil increases.
