A 600 km stretch of the Chambal river between (24055' -26050'N to 77030' - 400E) Jawahar Sagar dam and Panchnada has been protected since 1978 as a Netland sanctuary for conservation and management of gharials (Gavialis gangeticus). This sanctuary -the National Chambal Sanctuary is 1000 meters wide from either bank of the Chambal river. The Chambal is a deep, fast flowing, perennial, peninsular river that originates from the Singar Chouri peak of Vindhyan range in Mhow, Madhya Pradesh. It flows north east through Rajasthan, Madhya Pradesh and Uttar Pradesh where it joins with the Yamuna river to form the greater Gangetic drainage system. Except during monsoon (July -September) the Chambal river is a deep body of clear water averaging 400 meters in width, flowing at a leisurely pace in the plains. The maximum depth of the river is approximately 26 meters while the minimum depth is nearly 1 meters in most stretches (Hussain and Choudhury, 1990).