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| Spatial source apportionment analysis of target pollutant for sensitive area—A case study in Xin’anjiang River Basin for interprovincial assessment section |
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Abstract 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.
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Received: 25 December 2012
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