Analyzing the Impact of Climate Change on the Hydraulic Performance of the Al-Diwaniya River via Mathematical Modeling

Abstract

Iraq's arid sector is characterised by way of a unique hydrological machine. The Tigris River and the Euphrates are the cornerstones of Mesopotamian civilization and are celebrated at some point in the area. The Al-Diwaniya River, one of the Euphrates' tributaries, irrigates a giant expanse of cultivable land and regulates water purity inside the downstream region. We simulated the Al-Diwaniya River's drift pattern using the hydrological version (HEC-RAS). The hydrological version turned into calibrated by comparing its performance with the utilization of Manning's roughness coefficients, which have a final calibration range of (0.016–0.024) and a mean of 0.022 in the preponderance of the areas under investigation. The root-mean-rectangular blunders (RMSE) values were nearly 1, indicating immoderate consistency among the simulated and discovered data. The hydrodynamic version that was built with HEC-RAS is broadly diagnosed. And is closely correlated with the determined glide discharge, as tested with the validation results. This discovery could be a beneficial tool for estimating the release at ungagged places alongside the river. There aren't any comprehensive studies on using HEC-RAS to remedy hydraulic issues in the Al-Diwaniya River.