EFFECT OF THEHYDRAULIC PROPERTIES OF TIGRIS RIVER ON  TEMPERATURE DISTRIBUTION DOWNSTRAAM OF SOUTH – BAGHDAD POWER STATION

Jasam Nasar, Mahasan

	EFFECT OF THEHYDRAULIC PROPERTIES OF TIGRIS RIVER ON TEMPERATURE DISTRIBUTION DOWNSTRAAM OF SOUTH – BAGHDAD POWER STATION
AL-TAQANI
Article 1, Volume 21, Issue 4, 2008, Pages 130-139
Author
Mahasan Jasam Nasar
Abstract
This research aims to study the effect of hydraulic river properties namely,bed roughness and water-surface slope, on temperature distribution of water released from South-Baghdad power station on Tigris River. For this purpose, a two-dimensional numerical model was applied for estimating temperature distribution and diffusion in the river . Momentum Conservation Equation and Thermal Energy Equation were used to describe the temperature distribution along the study reach The model incorporates the (k-ε) turbulence model to calculate the distribution of turbulent viscosity .The pressure distribution was determined using hydrostatic pressure equation . The partial differential equations were simplified to obtain the system of linear equations that were then solved using Gauss-Elimination method . The numerical model was verified by conducting comparison of observed data from South-Baghdad station with those computed by the model .The comparison results show agreement with absolute error of (17%) and correlation factor of (0.940). The results of the study show that increasing the bed roughness from 0.02m to 0.06m causes a longitudinal retardation of temperature distribution by about (24%) and vertical advance about (20%). Also Increasing of the water-surface slope from 4 cm/km to 10 cm/km caused a vertical retardation of temperature distribution about (30%) and a longitudinal advance about (19%)

Statistics Article View: 210 PDF Download: 44