Due to construction of water structures on the main stream and tributaries of the Hanjiang River,the natural hydrological condition monitored by hydrological stations has become in environmental hydrologic regime,which means the hydrological condition is now under the control of human interference and the relationship between hydrological elements is various and complicated,so that it is difficult to make hydrometry and calculation.This paper introduced several methods for hydrometry under the condition of water structures on the Hanjiang River and provided a formula for calculating sediment runoff modulus.