 The catchment receives a mean annual rainfall of 859.6 mm.The Arkavathy River is one of the two rivers which partially meet the water supply needs of Bangalore; the other being the Kaveri.The reservoirs created by building dams on the Arkavathy are the "Hesaraghatta" and the "Chamarajasagara" at Thippagondanahalli (TG Halli) built during the years 1894 and 1933 respectively.