Hesaraghatta Lake is a fresh water lake created in the year 1894 across the Arkavathy River to meet the drinking water needs of Bangalore city. It is a manmade reservoir located 18 km to the north-west of Bangalore. The Arkavati River originates in the Nandi Hills of Chikkaballapur district and joins the Kaveri River at Kanakapura after flowing through Kolar District and Bangalore Rural district. The Vrishabhavati and the Suvarnamukhi are the tributaries which drain part of Bangalore and Anekal Taluk respectively into the Arkavati River. Another dam was built to create a reservoir called the Chamaraja Sagar at TG Halli When the Hesaraghatta Lake started drying up in the year 1925. This dam has been enlarged from time to time, over the years, to meet partially, the increasing water supply demand of Bangalore.
Apart from the water supply, the lake, which was known for its birds and river rafting, has drawn the attention of organizations and individuals for undertaking restoration works to restore it. Even in the deteriorated condition of the lake, birds such as the kingfisher, magpie robin, little egrets, common mynas,Brahminy kites, black drongos, bulbuls, greater coucals, purple sunbirds, etc have been reported in and around the lake periphery. The lake is also a great place for the winter migrants. The Hessarghatta reservoir has the capacity to supplement Bangalore water requirements at a far cheaper cost than any other. It makes ecological and economic sense to look at its revival.