• Dr T Siva Prathap
• Dr Mohd Akhter Ali
• Anupreet Singh Tiwana
• M Kamraju

A subsurface dam (SSD) is built across streams or valleys to establish an underground reservoir and to recharge groundwater. A subsurface dam constructed below ground level to arrest the flow in a natural aquifer. The best sites for construction of SSD are those where the soil consists of sand and gravel with rock and an impermeable layer at a few meters depth. Ideally the SSD should be built in the areas where rain water from a large catchment area flows through a narrow passage. The most favorable zone for construction of SSD is an area with gentle slope between hills and plains. The underground reservoirs in sand rivers are principally recharged by rainwater from flash floods, which originate in catchment areas with higher elevation. Upon full saturation of the underground reservoir the remaining flash floods will pass over the dam without further infiltration to replenish the aquifers down streams. The subsurface dams are more advantageous in dry regions because they offer minimal evaporation, as the evaporation is confined to the upper layers of the SSD. They avoid the problem of submergence of land area, and allow negligible water contamination. They also form sound basis for water budget available in the regions of low rainfall particularly rain fed regions of Rayalaseema region in general and YSR Kadapa district in particular. In the present study Chakrayapeta mandal is taken as the area of interest for the identification of suitable sites of SSDs using the available Digital Elevation Models from the Bhuvan Geoportal services and application of Geospatial Technology for their advantages, accuracy and time management

Subsurface dam, Geospatial Technology, Digital Elevation Model, Chakrayapeta

"SITE SELECTION FOR SUB SURFACE DAMS ACROSS PAPAGNI RIVER IN CHAKRAYAPETA MANDAL USING GEOSPATIAL TECHNOLOGIES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 3, page no.82-94, March-2019, Available :http://www.jetir.org/papers/JETIR1903812.pdf

"SITE SELECTION FOR SUB SURFACE DAMS ACROSS PAPAGNI RIVER IN CHAKRAYAPETA MANDAL USING GEOSPATIAL TECHNOLOGIES", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 3, page no. pp82-94, March-2019, Available at : http://www.jetir.org/papers/JETIR1903812.pdf