Geological Explorations for Reservoir Sites 

Geological Explorations for Reservoir Sites 

Though a dam is constructed to build a reservoir, a reservoir has a large area of spread and contained in a big chunk of the river valley upstream of the dam. Hence, while identifying a suitable site for a proposed dam, it is of paramount importance that the proposed reservoir site is also thoroughly investigated and  explored. The basis of planning for such explorations is to have a rapid economical and dependable pre-investment evaluation of subsurface conditions. It is also necessary  that a degree of uniformity be followed while carrying out subsurface explorations so that the frame of reference of the investigation covers all requisite aspects. 

In view of above, the Bureau of Indian Standards has brought out a code IS: 13216 - 1991 “Code of practice for geological exploration for reservoir sites”, that discusses the relevant aspects. According to the code since reservoir projects in river valleys are meant to hold water; therefore, The following aspects of the reservoirs have to be properly investigated 

  1. Water tightness of the basins 

  2. Stability of the reservoir rim 

  3. Availability of construction material in the reservoir area (d) Silting 

  4. Direct and indirect submergence of economic mineral wealth (f) Seismo-techtonics