Most of the hydraulic geometry relationships derived under premises that there are direct or indirect relation, at least statistically, be-tween meander geometry characteristics and some hydraulic variables as discharge and velocity. The authors, based on-a-site investigation on Al- Abbasia reach, in the middle of the Euphrates river, Najaf governorate, developed power functions (four models). The study-reach is about six kilome-ters, it is divided into twenty one cross-sections. These sections represent the meanders and bends in the reach. The recent work is to develop modelsdepending on dimensional analysis and Buckingham Pi theorem. These models are correlate the river width and mean depth with other geometry andhydraulic characteristics. The statistical comparison of the different methods illustrate that the method of dimensional analysis gives higher results inwidth model comparing with method of power function and lower in mean depth, but acceptable
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Most of the hydraulic geometry relationships derived under premises that there are direct or indirect relation, at least statistically, be-tween meander geometry characteristics and some hydraulic variables as discharge and velocity. The authors, based on-a-site investigation on Al- Abbasia reach, in the middle of the Euphrates river, Najaf governorate, developed power functions (four models). The study-reach is about six kilome-ters, it is divided into twenty one cross-sections. These sections represent the meanders and bends in the reach. The recent work is to develop modelsdepending on dimensional analysis and Buckingham Pi theorem. These models are correlate the river width and mean depth with other geometry andhydraulic characteristics. The statistical comparison of the different methods illustrate that the method of dimensional analysis gives higher results inwidth model comparing with method of power function and lower in mean depth, but acceptable
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