The lakes of the city being interconnected form a lake system which supports and sustains the groundwater recharge, water availability for drinking, agriculture, industries and is a source of employment through tourism. The lake system has three main lakes in its upper catchment area, six lakes within its municipal boundary and one lake in the downstream. The Udaipur lake system, arising out of the river Berach (Banas Basin) and its tributaries, is an integral component of the upper Berach basin. The upper Berach basin is a part of the Gangetic river system, wherein the river Berach meets river Ganga through the rivers Banas, Chambal and Yamuna.