Geometric Study of the Lesser Zab River Channel Between Altun-Kupri City and Dibbs Dam, Kirkuk, Northern Iraq

Abstract

River Lesser Zab in N Iraq flow regime has been changed as a result of building a number of dams across the river course causing the cross-section of the river to vary in time and space. The aim of this study is to investigate the morphological changes for the river channel from AltunKupri City to Dibbs Dam. Five cross-sections were studied to explain the relation between hydraulic geometry parameters (width, depth, and velocity) versus river discharge using linear regression analysis, and the results show that river discharge does have a direct linear relationship with the morphologic parameters of the river channel, and the width-depth ratio has a positive linear relationship with mean flow velocity, and negative nonlinear relationships with cross-section area, indicating widening of river reaches due to the morphological and geologic components of river banks. The meander channel system in the study area can be described as a single phase, irregular width variation with high lateral erosion rate for a meander bend. Also, the river has numerous perennials elongated to subrounded alluvial islands, which are covered by shrubs or houses for local inhabitants. These outcomes are expected to be useful in developing water resources projects in the area.

Evaluation of Lesser Zab River Course Change between Dokan and Dibbs Dams (N-Iraq), Using GIS Techniques

“…(Al-Dabbas et al, 2020) studied the management of Bai Hassan unconfined aquifer within the lesser Zab River basin, in Kurdistan region/Iraq using a modeling approach, the resulting model predictions allow greater insight into the potential consequences of pumping the aquifer and provide science-based input to resource management decisions. (Sadeq and Alhamdany, 2021) studies the geometry of the Lesser Zab River channel between Altun-Kupri City and Dibbs Dam at Kirkuk (Northern Iraq) and investigate the morphological changes in the river channel. The results show that river discharge does have a direct linear relationship with the morphologic parameters of the river channel.…”