Abstract
Effect of environmental flow in an urban river is estimated. Reclaimed water from sewage treatment plant is pumped up to its original intake (weir) and released to the river. The effect is described as changes in several hydraulic components such as water level and water surface width, and also change in water quality (BOD) is estimated. Flow duration curve is also utilized to quantify the flow re-regulation impact. Implementation cost for the project is calculated to compare the alternatives, and the cost-impact relationship is obtained.
