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 Asia Pacific Division Proceedings : 19th IAHR APD Congress, Hanoi 2014 : Session 1: ENVIRONMENTAL HYDRAULICS : NUMERICAL SIMULATION OF MATERIAL TRANSPORT IN A TIDAL URBAN RIVER NETWORK
NUMERICAL SIMULATION OF MATERIAL TRANSPORT IN A TIDAL URBAN RIVER NETWORK
Author : YUSUKENAKATANI(1), SHUZONISHIDA(2), MASAYASU IRIE(3), AZUSA HIRAOKA(4)&DAIKI NEI(5)
In this study, field observation was conducted to identify waterquality variation characteristics in a tidal urban river network in Osaka, Japan,and three¨Cdimensional hydrodynamic and water quality simulations were conducted to understand the variability characteristics of current, salinity, water temperature, water quality, and materials transport in the estuarine basin.The observation results showed that water quality variations in the estuary were strongly affected by the seawater intrusion process and the mixingof water masses from various sources.The simulations adeptly reproduced time variability of tidal elevation and water quality distributions although further improvements are necessaryto reproduce the vertical mixing process around the salt-water interface in the downstream area.The simulation results showed that biochemical processes and water¨Csediment interactions exerted during outflow to the coast had a minor influence on the water¨Cquality variations in this estuary. Tracer experiments indicated thatthe contribution of the Neya River water, which is highly polluted by human sewage and industrial effluent, to the water quality degradationwas almost the same around the mouths of the three downstream rivers.
File Size : 8,371,711 bytes
File Type : Microsoft Word Document
Chapter : IAHR Asia Pacific Division Proceedings
Category : 19th IAHR APD Congress, Hanoi 2014
Article : Session 1: ENVIRONMENTAL HYDRAULICS
Date Published : 10/03/2015
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