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 Study on Factors Related to Long-Term Environmental Changes in Lake Jusan
A Study on Factors Related to Long-Term Environmental Changes in Lake Jusan
Author : Shuntaro Matsune , Makoto Umeda, Hitoshi Tanaka and Mikio Sasaki
Lake Jusan is a brackish lake located in the down reaches of Iwaki River system and is one of the most famous fishing places of Corbicula japonica in Japan. The aquatic environment in the lake and the river has long been changing under numerous natural and anthropogenic factors. The former includes changes in meteorological and hydrological systems, while the latter is composed of river im provement works, reclamation for farmland, etc. In this study, we first focused on topographical changes in Lake Jusan caused by the reclamation project completed in 1969 and by sedimentation. The influence on salinity fluctuation in the lake was investigated using computational hydraulic simulation and was found rather small. We then assessed influence of hydrological changes. In 1950s before large dams were constructed in the basin, drought occurred more frequently than 2000s, which seems to have c aused excessively high salinity condition for habitation of C. japonica.
File Size : 406,582 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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