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You are here : eLibrary : IAHR World Congress Proceedings : 35th IAHR Congress - Chengdu (2013) : THEME 4 - HYDRO-ENVIRONMENT : Study on Application of Pre-Dam in the Eutrophication Control of Gehu Lake
Study on Application of Pre-Dam in the Eutrophication Control of Gehu Lake
Author : Yimin Zhang, Jincheng Duan, Jianying Chao, Yuexiang Gao, Chuang Zhou and Yang Yang
According to the research conducted by the pre-dam system built on the outlet of Gehu Lake, which is the confluent of Xiaxi and Biandan River that are located in the northern part of Gehu Lake, we found that pre-dam system had significant effect on inflow rivers. In the stable period, inflow water quality was improved from Grade ? to Grade ?~?, as well as the concentrations of TN and TP were also decreased from 1.21~3.09mg\L to 0.62~1.26mg\L and from 0.05~0.24mg\L to 0.03~0.09mg\L respectively, with 60% average removal rate. For algae, Chl-a concentration was decreased from 15.10~126.07mg\m3 to 14.32~42.95mg\m3, with the average removal rate of (67.553.06) % and the highest rate of 82.83%. Besides, in the different areas of pre-dam system, storage buffer zone had obvious role on TN, TP and Chl-a, which is significantly different with other areas (P<0.05). In the same area, for di fferent water quality indicators, only ecological stability area had obvious effect on Chl-a, which was significantly different from the effect on TN and TP (P<0.05)..
File Size : 631,894 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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