No.074 研究課題 / Project
多摩川における汚濁物質の収支と流下過程Mass balance of pollutants and its break in course of Tamagawa River| 学術研究 Academic Research |
No.074 |
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| 代表研究者 Principal Investigator |
市川 新 Arata Ichikawa |
| 所属（採択当時） Affiliation |
東京大学工学部助教授 The University of Tokyo |
| 研究内容要約 Research Summary |
１９７５年に同じ課題で調査研究を行ったので、その後の多摩川の汚濁の状況と、その流下過程における水質の変化を追跡するものである。 本調査・研究において、本川２６地点、流入支川排水計５０地点で、流量・水質（Ｂ０Ｄ，Ｃ０Ｄ等の有機物質、Ｎ‐Ｐの栄養塩類）で測定し、それぞれの「汚染負荷量」を算定し、汚濁の実態をあきらかにした。さらに流域内の汚濁発生源とその使用水量・排水水質を調査し、多摩川本川への汚濁物質の流入状況（流達率）であきらかにした。 In 1975, we carried out investigational study on the same theme. This is a follow-up research reporting the pollution of the Tamagawa river after the last study, and changes in water quality from upstream to downstream. In this study, 26 survey sites were selected along the Tamagawa River , and 50 along its tributaries and drainage canals, where flow rate and water quality were assessed (organic matter such as BOD and COD, and nutrient salts such as N-P). Based on these data, we calculated pollution loading amount for each site to understand the state of pollution. Also, we investigated the sources of pollutants in the basin, the amount of discharged pollutants and the water quality of waste water, and then determined pollutant delivery rate, an indicator to understand the state of the inflow of pollutants into the Tamagawa River. |
| 共同研究者 Collaborators |
井信行,広沢裕輔,横山道子 |
| 研究全文 Full Text |
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