Eutrophication of Miharu dam and Characteristics of the Inflow lord grasp By the Pre-reservoir

• Published in: ENVIRONMENTAL ENGINEERING RESEARCH Vol. 37; pp. 201 - 207
• Main Authors: NAKAMURA, Michimasa, SATOU, Youichi, HOURYOUZAKI, Takeshi
• Format: Journal Article
• Language: English; Japanese
• Published: Japan Society of Civil Engineers 2000; 公益社団法人 土木学会
• Subjects: Miharu Dam; nitrogen; phosphorus; pollutant load; Pre-reservoir
• ISSN: 1341-5115; 1884-829X
• DOI: 10.11532/proes1992.37.201

This research is the one that studied the effect and subject of the pre-reservoir based on the present condition of the Eutrophication of Miharu dam. The following result was obtained about the effect of the pre-reservoir. (1) The pre-reservoir is grasping 10% of T-N and 17% of T-P to the inflow load of when that is usual flow based on the surveys completed on Sep. to Dec.1998. (2) It is grasping 28.4% of T-N, T-P to the inflow load at the time of the flood based on the surveys completed on Oct. 27-28, 1999. Also, we understood the following as the load grasp characteristic of the pre-reservoir. (5) The T-N and T-P load grasp quantity is correlated to flow fluctuation quantity (6) It interlocks it to the fluctuation of SS load grasp quantity except the period in which flow decreases.