| 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 |
| 投稿时间：2014-05-07 修订日期：2014-08-08 |
| DOI： |
| 中文关键词:汉丰湖 富营养化 综合评价 环境容量 |
| 英文关键词:Hanfeng Lake eutrophication comprehensive assessment nutrient loading |
| 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） |
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| 中文摘要: |
| 2012年、2013年季节性监测了汉丰湖水体理化指标，采用综合营养状态指数法对其富营养化状态进行了评价，采用沃伦威德尔模型和狄龙模型计算了化学需氧量、总氮、总磷的水环境容量。结果表明：汉丰湖水质总体处于地表水Ⅱ类~Ⅳ类标准，TN 0.76~2.24mg/L、平均1.41mg/L，NH3-N 0.17~0.95mg/L、平均0.41mg/L，TP 0.010~0.106mg/L、平均0.069mg/L，CODMn 2.34~14.6mg/L、平均4.22mg/L。东河区域水质优于小江干流、南河区域，秋季污染程度最轻；汉丰湖水体营养状态介于中营养到轻度富营养型，其中南河区域的营养程度相对较高；从单个评价因子看，总氮的营养状态最高，持续处于轻度、中度至重度富营养状态；汉丰湖化学需氧量、总氮、总磷现状水环境容量分别为37335、109.1和1643.84t/a，为达到汉丰湖水功能区划Ⅱ类水的管理目标，总氮、总磷削减率分别为38%和56%。 |
| 英文摘要: |
| 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 the 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 Vollenweider-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 1.41mg/L (0.76-2.24mg/L), 0.41mg/L (0.17- 0.95mg/L), 0.069mg/L (0.01-0.106mg/L), and 4.22mg/L (2.34-14.6mg/L), respectively. Water quality in the Donghe area was better than in Xiaojiang and the Nanhe area, with the pollution level lowest in autumn 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 eutrophic range, from slight, to moderate and even severe. Analysis showed that loading of CODMn, total nitrogen and total phosphorus in Hanfeng lake were 37335t/a, 1643.8t/a and 109.1t/a, respectively. Nutrient loading should be reduced by 36% for nitrogen and by 58% for phosphorus to achieve water quality meeting Level II standards throughout Hanfeng Lake. |
| 郑志伟,胡莲,邹曦,潘晓洁,彭建华,张志永,万成炎.2014.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,35(5):22-27. |
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