太湖西北部湖区入湖河流氮磷水质标准修正方案研究

发布时间：2018-01-11 23:14

本文关键词：太湖西北部湖区入湖河流氮磷水质标准修正方案研究　出处：《长江流域资源与环境》2017年08期 　论文类型：期刊论文

更多相关文章： BATHTUB 太湖 入湖河流 TN TP 水质标准

【摘要】：氮磷污染一直是太湖流域的首要污染问题,有效遏制氮磷入湖量的增加是治理太湖的重要任务。然而由于我国现行的地表水环境质量标准(GB3838-2002)中河流和湖泊氮、磷水质标准存在差异,即河流无总氮控制指标、河湖总磷标准不一致的问题,往往造成通过控制入湖河流污染来改善太湖湖泊水质时,湖泊污染物浓度往往达不到治理目标。以太湖西北部湖区及其入湖河流为例,利用BATHTUB模型模拟入湖河流与湖泊TN、TP的关系,推算太湖在满足现行湖泊水质标准中TN和TP各类别目标值的情形下的环境容量并以此环境容量决定入湖河流的水质,进而提出相应的方案进行比选,从而提出太湖入湖河流氮磷水质标准修正方案。结果表明:(1)当太湖入湖河流执行现行河流水质TP标准时,对应湖泊的水质TP超标,并不能达到保护湖泊的目标;(2)当太湖西北部湖区入湖河流TN、TP执行现行湖泊水质标准,对应湖区水质均能达标并且优于目标限值,然而该方案对于污染较为严重的太湖区域的实际参考意义不足;(3)以现行湖泊水质标准TN、TP各类别为目标值反推计算入湖河流水质指标,既能保证湖泊水质达标,又不会使河流水质标准过于严格,因此其结果可作为入湖河流水质标准修正的参考,从而提出太湖入湖河流TN、TP水质标准建议方案。
[Abstract]:Nitrogen and phosphorus pollution has always been the primary pollution problem in Taihu Lake Basin. It is an important task to control the increase of nitrogen and phosphorus entering the lake effectively. However, because of the current environmental quality standard of surface water in China (GB3838-2002), the nitrogen of rivers and lakes is very important. There are differences in the standard of phosphorus water quality, that is, there is no total nitrogen control index in rivers, and the problems of inconsistent total phosphorus standards in rivers often result in the improvement of water quality of Taihu Lake by controlling the pollution of rivers into lakes. The concentration of pollutants in lakes often fails to reach the goal of control. Taking the northwestern Lake area of Taihu Lake and its rivers entering the lake as an example, the BATHTUB model is used to simulate the relationship between the rivers entering lakes and the TNTPs of lakes. The environmental capacity of Taihu Lake in the case of meeting the target values of TN and TP in the current lake water quality standards is calculated and the water quality of the rivers entering the lake is determined by the environmental capacity, and the corresponding schemes are put forward for comparison and selection. The result shows that when Taihu Lake enters lake river, the water quality TP of the corresponding lake exceeds the standard when the current river water quality standard is carried out. Fail to achieve the goal of protecting lakes; 2) when TNTP implements the current lake water quality standard, the corresponding lake water quality can reach the standard and is better than the target limit. However, the actual reference significance of this scheme to the seriously polluted Taihu Lake area is insufficient. 3) using TNTP as the target value to calculate the water quality index of the rivers entering the lake can not only guarantee the lake water quality to reach the standard, but also not make the river water quality standard too strict. Therefore, the results can be used as a reference for the revision of the water quality standard of the rivers entering the lake, and the proposal of TNTP water quality standard for the rivers entering the lake of Taihu Lake is put forward.
【作者单位】：中国科学院南京地理与湖泊研究所流域地理学重点实验室;中国科学院大学;江苏省水文水资源勘测局;
【基金】：江苏省水利科技项目(2014031)~~
【分类号】：X52
【正文快照】： 河流是湖泊与流域生态环境联结的主要纽带和通道,治理湖泊要从入湖河流开始[1]。过多的氮、磷输入入湖河流,会使整个流域污染程度大幅度提高,污染物最终流入湖泊,直接影响湖泊的整体水质状况[2~4]。因此对入湖河流的水环境质量进行必要的监测和评价,是湖泊水质治理与保护的重

【相似文献】