文章摘要
衢州地区渔业水域水库水体富营养化水平及驱动因子研究
Research on Eutrophication and its Driven Factors of Reservoir in Quzhou Area
投稿时间:2019-12-26  修订日期:2020-01-18
DOI:
中文关键词: 渔业水域水库  富营养化  驱动因子  相关性  主成分  衢州地区
英文关键词: fishery reservoir  eutrophication  driven factors  correlation  PCA  quzhou area
基金项目:浙江省科技计划项目
作者单位E-mail
施沁璇 浙江省淡水水产研究所 shizhuhuan@163.com 
郝贵杰 浙江省淡水水产研究所  
叶霆 衢州市水产技术推广站  
吴琦芳 浙江省淡水水产研究所  
高晟 浙江省淡水水产研究所  
盛鹏程 浙江省淡水水产研究所  
周聃 浙江省淡水水产研究所  
叶雪平 浙江省淡水水产研究所 yxp900@sina.com 
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中文摘要:
      为探求衢州市渔业水域水库水体富营养化水平和主要驱动因子,本文基于2018年水质监测数据,综合评价黄坛口水库(S1)、铜山源水库(S2)、狮子口水库(S3)、花园垄水库(S4)和金仓垅水库(S5)等5座不同水库水体富营养化水平,并采用相关性分析、主成分分析等方式分析探讨水质环境因子对水体富营养化水平间的影响和相关关系。结果表明,叶绿素a 与综合营养状态指数法评价结果趋于一致,表明S1、S2、S3均为中营养,S4为轻度富营养,S5为重度富营养,水产养殖水域富营养化水平显著高于增殖放流水域(P<0.05)。5个水库中S5为氮限制,其余水库均为磷限制。多元线性逐步回归分析表明叶绿素a与溶解氧(Do)、透明度(SD)、铜(Cu)、总磷(TP)、总氮( TN)、高锰酸盐指数(CODMn )相关性较好,综合营养状态指数(TLI)与水温(T)、透明度(SD)、铜(Cu)、总磷(TP)、总氮( TN)相关性较好,得到模型:Chl.a=19.793CODMn-32.065TP-33.004, TLI=1.062CODMn+18.468TP-0.06SD+0.450T+1.765TN+33.886。综合相关性分析、主成分分析结果显示,CODMn、TP、SD、T、TN是影响衢州市水库水体富营养化的主要因子,其中氮磷营养盐和有机物是造成水库水体富营养化的主要影响因子,水温是造成各水库富营养化季节性变化的主要原因,而pH、溶解氧是水体富营养化后的结果,可以作为水库富营养化水平的指示因子。
英文摘要:
      In Quzhou area, there are five important reservoirs, they are Huangtankou reservoir(S1),Tongshanyuan reservoir(S2), Shizikou reservoir(S3), Huayuanlong reservoir(S4) and Jincanglong reservoir(S5). In order to ascertain the eutrophication level and their main driven factors in of reservoirs in Quzhou area, we applied the water quality monitoring date of five reservoirs in 2018 to evaluate the eutrophication level and analyzed the relationship between eutrophication level and environmental factors. Comprehensive trophic level index(TLI) method showed that the reservoir S1, S2 and S3 were mesotrophic, S4 was lightly eutrophicated and S5 was highly eutrophicated, which was in accordance with the evaluated result based on Chl.a. In order to improve the comprehensive development and utilization of the reservoirs, functions such as aquaculture had been developed in Quzhou. Result showed that the eutrophication level in aquacultural areas were significantly higher than those of breeding and releasing waters. Furthermore, we analyzed how water quality were affected by aquaculture on cluster analysis method. Results showed that if we engaged in aquaculture in suitable methods, it may not the main factors to reservoir's eutrophication. According to N/P, we found that S5 was on N limitation, while others were P limitation. So we should pay more attention to the control of P and N. The regression equation between Chl.a , TLI and the correlated environmental factors could be expressed through the multiple linear stepwise regression as: Chl.a=19.793CODMn-32.065TP-33.004, TLI=1.062CODMn+18.468TP-0.06SD+0.450T+1.765TN+33.886. Combined with the correlation and principal component analysis(PCA), it could be concluded that CODMn, TP, SD, T and TN were the main influence factors to eutrophication of reservoirs in Quzhou District, among which N P nutrients and organics were the impact factors, water temperature was the main cause of seasonal change. On the other hand , pH and Do were therefore a consequence of eutrophication, they could be indicators to eutrophication level. pH and Do were increased with increasing eutrophication level, but in some highly eutrophic water, overgrowth of algae can cause a rapid drop in dissolved oxygen in the water.
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