STUDY ON TURBIDITY DURING FLOOD IN MYOGINOHANA AREA OF LAKE KASUMIGAURA
This paper describes an environmental investigation of turbidity increase in the Myogihona area of Lake Kasumigaura in Japan. The construction of the water channel Tone Dousuiroconnected between the lake and the Tone River was completed in order to make more water resources available in the nearby urban zone. However, there is negative concern that the careless gate operation of the channel will cause a disturbance of the bed mud with the turbidity increase by the sudden water discharge, and that this increase will play a bad role in the water environment. Thus, we tried to investigate qualitatively the time-series of the water flow patterns, the geological characteristics and the turbidity increase in this area by the field observations, so as to comprehend the relation between the flow condition and turbidity increase. The overall results of the field observations and the geological surveying accompanied with the previous study devoted for the hydraulic investigations of the local bed mud in this area showed us that the turbidity increase is mainly generated not by the mud erosion,but by the high concentration of turbidity in the inflow water during the floods. In addition, we carried out the preliminary flow simulation in the case of the normal operation with the planed discharge through the channel. As a result, it is found that the very little bed mud will be possibly raised up in the flows by the normal operation.
Lake environment high turbidity bed erosion suspended mud gate operation
Keisuke Yoshida Tadaharu Ishikawa Yuu Kobayashi Fumi Sasaki Sadao Aoyama Makoto Ichiyama
Tokyo Institute of Technology, Japan B.Eng., Tokyo Institute of Technology, Japan M.Eng., City of Yokohama, 1-1 Minato-cho, Naka-ku, Yokohama, Japan Kasumiganra Headrace Construction Office, Tsukuba City, lbaraki, Japan Tsukuba Hydraulic Laboratory, Pacific Consultants, Co., Ltd., Tsukuba City, Ibaraki, Japan
国际会议
第16届亚太地区国际水利学大会暨第3届水工水力学国际研讨会(16th IAHR-APD Congress and 3rd Symoposium of IAHR-ISHS)
南京
英文
472-477
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）