环太湖主要入湖河流污染负荷量 对太湖水质的影响及趋势分析

基于2007—2014年环太湖主要入湖河流水量、水质监测资料以及湖区水质监测资料,以CODMn、NH3-N、TP、TN为主要污染指标,阐述入太湖各湖区污染负荷量的时空分配,评估环太湖主要河流入湖污染负荷量对湖区水质时空变化的影响。通过环太湖入湖河流水量分析,考虑污染负荷量的历史长序列变化规律,定量了环太湖入湖河流水量、水质等相关因素对太湖水体污染负荷量贡献率,分析环太湖河流入湖污染负荷量对太湖水质的影响。结果表明,近年来对太湖入湖河流的治理成效,说明对入湖河流污染物的控制是缓解和治理太湖污染负荷输入的重要途径,为制定和实施环太湖河流入湖污染负荷限排总量意见提供参考。

Trend analysis for pollutant load of major rivers around Taihu Lake and its impact on water quality in Taihu Lake

Based on the monitoring data of water quality and quantity in major rivers around Taihu Lake and the monitoring data of the water quality in Taihu Lake timing from 2007 to 2017, four major pollutant indicators, including potassium permanganate, ammonia nitrogen, total nitrogen and total phosphorus are used to explore the pollutant load spatio-temporal distribution of different regions around Taihu lake, and further to evaluate the influences of the pollutant loads of the major rivers around the lake on spatio-temporal changes of the water quality in Taihu Lake. By analyzing the water quantity of the major rivers around Tahihu Lake and incorporating the long- term changes of the pollutant loads of the major rivers, the contribution of water quantity and quality in the major rivers to the pollutant loads of the Taihu Lake is investigated in a quantitive way so as to determine the impacts of the pollutant loads of the major rivers around the lake on the water quality in Taihu Lake. The results show that the major rivers around Taihu Lake have been effectively managed in recent years, indicating that controlling the pollutants of the rivers around Taihu Lake is an important approach to ease and control the input of pollution load into Taihu Lake, thus providing a reference for the formulation and implementation of the total discharge limit of the pollution load of the rivers into Taihu Lake.