IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 5 - FLUVIAL HYDRAULICS AND RIVER MANAGEMENT : Channel Incision Mitigation downstream of Intake Works Case: Huachipa Diversion Dam
Channel Incision Mitigation downstream of Intake Works Case: Huachipa Diversion Dam
Author : Luis Castro Inga and Julio Montenegro Gambini
This research presents a methodology and results of the tasks performed on a mobile bed physical model whose main objective is to protect a downstream intake structure from local and general erosion. Huachipa Diversion Dam is located on the Rimac River, which is a steep river with a supercritical regime; on the right bank downstream from the intake presented a canyon formation due to erosion. To control the general erosion, a solution effective against this was the construction of a battery of rockfill or riprap sleepers, transverse structures that are placed buried in the bed of the stream, perpendicular to the direction of flow, from bank to bank and aims to slow the drop in elevation of the river bed. To local erosion control was used a riprap transition downstream from, stilling basin taking into account the fluctuating velocities and pressures generated macroturbulent flows. The model used in this research is a mobile bed model of scale 1\40, where longitudinal and transverse erosion and sedimentation processes are observed. The design flow is 580 m3 \ s corresponding to a return period of 1000 years. The physical model was conducted in the National Hydraulics Laboratory of the National University of Engineering in Lima, Peru on a scale of 1\40 moving bed. The design of this proposal was based on the principles of tractive force and moments stability of a particle (Julien, 1995). Riprap sleepers were designed using the presented shear at the bottom of the channel or bed, built a protective riprap donwstream of diversion dam plus 4 sleepers. It had very good results for the general and regressive erosion control.
File Size : 997,987 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 35th IAHR Congress - Chengdu (2013)
Date Published : 18/07/2016
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