水生态学杂志Issue(5)：22-27,6.
汉丰湖富营养化综合评价与水环境容量分析
Eutrophication Assessment and Analysis of Nutrient Loading in Hanfeng Lake
摘要
Abstract
Eutrophication,a serious water quality problem,has been receiving increased national and international attention.Nitrogen and phosphorous are the primary nutrients leading to eutrophication in lakes and reservoirs and, the established management goals for water quality provide impetus for the control of eutrophication.Therefore,the evaluation of eutrophication and the analysis of water resource capacity have gradually become important means for managing water resources.In 2012 and 2013,seasonal monitoring of physical and chemical parameters in Hanfeng Lake was carried out and parameters included total nitrogen (TN),ammonia nitrogen (NH3-N),total phosphorous (TP),transparency (SD),chemical oxygen demand (CODMn )and chlorophyll a(chl-a).Samples were collected at 10 sites,located in the Nanhe area (HF1 -HF4),Donghe area(HF5 -HF6)and the main stem of Xiaojiang (HF7-HF10),respectively.Monitoring data during March,June,September and December of the two years were collected.A comprehensive eutrophic state index was applied to assess the trophic status,and the Vollenwei-der-Dillon model was used to analyze the nutrient loading and assimilation capacity of Hanfeng Lake.Results show that the water quality of Hanfeng Lake meets water quality standards II-V for surface water.The mean values (range in parentheses)for TN,NH3-N,TP,CODMn were 1 .41 mg/L (0.76-2.24 mg/L),0.41 mg/L (0.17-0.95 mg/L),0.069mg/L (0.01 -0.106 mg/L),and 4.22 mg/L (2.34-14.60 mg/L),respectively.Water quality in the Donghe area was better than in Xiaojiang and the Nanhe area,with the pollution level lowest in au-tumn for all three areas.In general,Hanfeng Lake is mesotrophic to slightly eutrophic,with higher nutrient levels in the Nanhe area.Total nitrogen levels were particularly high and,as a single indicator,were always in the eu-trophic range,from slight,to moderate and even severe.Analysis showed that loading of CODMn,total nitrogen and total phosphorus in Hanfeng lake were 37 335 t/a,1 643.8 t/a and 109.1 t/a,respectively.Nutrient loading should be reduced by 36%for nitrogen and by 58%for phosphorus to achieve water quality meeting Level II stand-ards throughout Hanfeng Lake.关键词
汉丰湖/富营养化/综合评价/水环境容量Key words
Hanfeng Lake/eutrophication/comprehensive assessment/nutrient loading分类
资源环境引用本文复制引用
郑志伟,胡莲,邹曦,潘晓洁,彭建华,张志永,万成炎..汉丰湖富营养化综合评价与水环境容量分析[J].水生态学杂志,2014,(5):22-27,6.基金项目
国家十二五水专项子课题（2013ZX07104-004）；国家十二五科技支撑项目（2012BAC06B04）；三峡后续工作科研项目（2013HXKY2-3）。 （）
