改进的灰色关联分析法在渭河宝鸡段水质综合评价中的应用

为了量化评价渭河宝鸡段水质现状，并对污染趋势进行分析，为水环境保护及管理提供依据，应用改进的灰色关联法，在试验数据和监测结果基础上，对BOD5、CODCCr、CODMn、NH3-N、TP、TN 6个水质指标进行定量计算和评价。结果表明，渭河宝鸡段水质现状总体良好，评价断面水质达到或超过相应功能区水质标准，其中林家村断面达到Ⅱ类水质标准，胜利桥、卧龙寺桥和常兴桥断面的水质可达到Ⅲ类水质标准，虢镇桥、蔡家坡桥的水质较差，为Ⅳ类水质。同时，评价结果还表明，有机污染是水质好坏的限制性因子。采用改进的灰色关联度分析法，具有准确性、客观性的特点，对渭河宝鸡段水质评价效果良好。

The Application of Improved Grey Correlation Analysis to Comprehensive Assessment of the Water Quality in Weihe River of Baoji Section

Quantitative assessment for the water quality and contamination status trend of Weihe River of Baoji section provided a basis for environmental protection and water management. Based on the application of the improved gray correlation method, using the experimental data and monitoring results, the quantitative calculation and evaluation of BOD_5, chemical oxygen demand, permanganate index, NH3-N, TP, TN 6 quality indicators were executed. The Water Quality in Weihe River of Baoji was generally good, the evaluation section of the water quality met or exceeded water quality standards appropriate functional areas, including Linjia Village section II, Shengli Bridge, Wolongsi and Changxing Bridge section m water quality standard could be achieved, the water quality of Guozhen Bridge and the Caijiapo Bridge was poorly achieved IV. While evaluation results also showed that organic pollution was still the limiting factor of water quality. The improved gray correlation analysis, with the characteristics of accuracy and objectivity had good effect on the water quality assessment in Weihe River of Baoji section.