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 4 - HYDRO-ENVIRONMENT : A Simulation Tool for the Control of Pollutants in River Flow Using Storage Areas: Application to th...
A Simulation Tool for the Control of Pollutants in River Flow Using Storage Areas: Application to the Ebro River
Author : Mario Morales-Hernández, María González-Sanchís, Javier Murillo and Pilar García-Navarro
Nutrient load to water in rivers has become a great concern in the industrialized countries as their concentration increased exponentially since the sixties, mainly due to the increased use of mineral fertilizers and phosphorus compounds. The impact of human activity on surface stream habitats has been extensively studied throughout the world, forming the basis for many stream restoration efforts mostly based on one-dimensional (1D) models that assume steady state and uniform cross-sectional parameters. That simplification is not always adequate to represent a real river or stream. The Ebro River (NE Spain) presents flooding episodes when snow melts in the Pyrenees. To avoid flooding in living areas, some storage areas outside the city are prepared to be flooded. A simplified example inspired in the mentioned river is presented. A benchmark river reach provided with three lateral floodplain areas connected through three regulated gates that allow water to flow in both senses is assumed. A concentration inlet function is introduced under different flooding scenarios. The objective of the solute regulation could be the reduction of the river pollutant at the outlet section, the maximization of the solutes in the inundation floodplain areas or the mitigation of sudden changes in the water temperature. Unsteady events over complex geometry including flooding areas require a 2D hydraulic model. The implementation of a predictive water quality model in a finite volume unsteady 2D shallow flow simulation model is proposed in this work. The coupled system of equations includes the 2D hydraulic model as well as the nitrate and ammonium transport equations. When solved, it provides information about the variables in time and space
File Size : 412,111 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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