%0 Journal Article
%T Studies on eutrophication problem and control strategy in the Three Gorges Reservoir<br>三峡水库富营养化问题与对策研究
%A CAI Qing-Hua
%A HU Zheng-Yu
%A <br>蔡庆华
%A 胡征宇
%J 水生生物学报
%D 2006
%I 
%X On 1st June 2003,the Three Gorges Reservoir(TGR) began its storage officially, and the water level reached at 135 m on 10 June(and at 139 m on 5 November).Three are a lot of tributaries been flooded in the lower reaches,and many bays are therefore formed from that time in the reservoir.We monitored the changes of ecological environment of TGR,and found that most of bays was in eutrophic state and emerged several serious algal blooms predominated by dinoflagellate(Peridiniopsis spp.) and diatom(Cyclotella sp.),especially in spring.In case of Xiangxi Bay,the largest one in Hubei part of TGR and the one most close to the dam,the monthly monitoring of 2 years shown that the trophic state in most month was eutrophic,except in winter.Farthermore,the trophic state in spring was hyper-eutrophic.On the other hand,to get a general information of eutrophication situation in TGR,we assessed the trophic state of 22 bays and TGR itself in spring,2005.The results shown that 5 bays(22.7%) were in meso-trophic,and 17 bays(77.3%) were in eutrophic(10 bays in hyper-trophic,occupied 45.5%).The water quality of TGR itself,however,was still in good condition(meso-trophic),due to its fast exchange rate of water.Statistic analyses shown that relationship between chlorophyll a and watershed characters(annual discharge and catchment area) of bays in TGR was significant negative.It implied that,generally,the smaller of the bay(or its annual discharge),the higher of chlorophyll a concentration,i.e.the easier of forming algal bloom in spring.Based on the monitoring and researching,we discussed and proposed several strategies to control or mitigate eutrophication phenomena in TGR,including pollution control,complete survey,mechanism study and eco-hydraulic regulation.
%K Three Gorges Reservoir
%K Eutrophication
%K Algal bloom<br>三峡水库
%K 富营养化
%K 藻类水华
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=256651267D5D2E4520A7707D05E98747&aid=5E4DFCFD86F022DF&yid=37904DC365DD7266&vid=340AC2BF8E7AB4FD&iid=CA4FD0336C81A37A&sid=DF92D298D3FF1E6E&eid=708DD6B15D2464E8&journal_id=1000-3207&journal_name=水生生物学报&referenced_num=44&reference_num=17