Estimate the Sediment Load Entering the Left Side of Mosul Dam Lake Using Four Methods

Abstract

Mosul Dam is one of the important dams in Iraq, it suffers like other dams from the problem of sediment accumulation in the lake. The daily surface runoff was estimated from seven main valleys in the left bank of the lake during the period (1/1/1988-31/8/2016) by applying SWAT model. The model performance was assessed using the statistical criteria R 2 , IOA, NSE and T-Test, the results were good. The averages annual surface runoff from the main valleys to the lake ranged between 3.3*10 6 m 3 to 42.1*10 6 m 3 . The daily sediment load was estimated by four methods, Bagnold method was used in SWAT sediments transport simulation, while Yang, Toffaletti methods and Excess Shear Theory were programed by MATLAB, The performance of sediments transport simulation using Bagnlod, Yang and Excess Shear Theory methods was assessed using the same four statistical criteria and the results were good, The averages annual sediment load from the main valleys to the lake were (5.78*10 3