敏感区域目标污染物空间溯源分析

基于SPARROW模型,利用新安江流域2009~2010年60个监测站点的TN浓度数据,以及相关污染源及空间属性数据对流域水质进行模拟分析,结果表明,流域内69%的河段TN模拟浓度可以达到III类及以上水质标准.对跨省界评估断面——街口断面进行TN污染源溯源分析,发现上游各子流域的工业源污染对断面污染总量的贡献比例为7.41%,农业源污染贡献比例为57.52%,生活源污染贡献比例为35.07%,且分别具有不同的空间分布特征,可以考虑使用该方法为以跨界断面污染物浓度控制为目标的相关削减措施的提出提供技术支持.

Spatial source apportionment analysis of target pollutant for sensitive area—A case study in Xin’anjiang River Basin for interprovincial assessment section

SPARROW surface water-quality model was calibrated using measurements of total nitrogen from 60sites during 2009to 2010, pollutant sources data and land-surface and stream-channel characteristics in the Xin’anjiang River Basin. The results indicated that modeled TN concentration in 69 % reaches can match or overmatch the III-class water- quality criteria in the basin. Tracing the TN contributions from upper reaches to Jie-kou Site, which was interprovincial assessment section, point source, agricultural source and domestic source accounted for 7.41%, 57.52% and 35.07%, respectively, with different features in spatial contribution for each. This method can be set as an effective tool to provide technical support in the process of making pollution reduction measures for interprovincial assessment section.