No. FEE 215 ENV 100 Karnataka Government Secretariat,
Bangalore, Dated 18-11-2003.
Whereas Tippagondanahalli Reservoir (TGR), built at the confluence of Arkavathi and Kumudvathi rivers is one of the sources of drinking water to the city of Bangalore and the surrounding areas since 1930. Tippagondanahalli Reservoir in normal year supplies up to 125 MLD of water to Bangalore City and in recent years, the inflow to Tippagondanahalli Reservoir has been decreasing. The quality of water supplied by this reservoir has also deteriorated due to the efficient discharge into the reservoir. In view of these facts, BMRDA initiated a study by Indian Space Research Organization (ISRO) in association with Indian Resources Information and Management Technologies Pvt. Ltd. (IN-RIMT) to ascertain the reasons for reduced inflow of water to Tippagondanahalli Reservoir.
And whereas the study carried out by Indian Space Research Organization in association with Indian Resources Information and Management Technologies Pvt. Ltd., (IN-RINMT) reveals that unplanned development in the catchments area is one of the main reasons for the deteriorating quality and reduced inflow into the reservoir. Increasing urbanization and industrialization in the catchment areas has altered the drainage pattern in the catchments areas. This in turn has affected the inflow into the Tippagondanahalli Reservoir. There are number of industries in the catchments area, whose effluents also flow into the Tippagondanahalli Reservoir affecting the quality of water. Underground leachate from untreated effluent and sewage is also affecting the quality of ground water in this area.
And whereas the total extent of Tippagondanahalli Reservoir catchments is 1453 sq km and covers parts of Doddaballapur, Nelamangala, Devanahalli, Magadi and Bangalore Taluks. Tippagondanahalli Reservoir receives inflows from two streams namely Kumudvathi and Arkavathi. This study done by ISRO and IN-RIMT, has made several recommendations, to protect and preserve the Tippagondanahalli Reservoir catchments. The recommendations include as follows:
Formation of a Conservative Zone covering the entire Tippagondanahalli Reservoir catchments and adopting suitable land utilization strategy therein, urbanization/industrialization.
· Declaring a zone of about 10 Km radius around Tippagondanahalli Reservoir as area of protection.