基于中心点三角白化权函数聚类的水质评价

Based on Grey Center Triangular Whitenization Weight Function Clustering of Water Environmental Quality Assessment

针对以往灰色白化权函数评估主要通过测定指标灰聚类系数判定被评价对象的优劣强弱,进行等级识别评价,将中心点三角白化权函数的灰色评估引入到水质综合评价中,并进一步扩展灰色三角白化权函数计算方法,完成多评价对象的准确等级定位及比较排序。将该方法应用于山东省聊城市东昌湖21孔桥水质评价中,实例计算表明:5月份东昌湖21孔桥的水质属于Ⅱ类,湖水水质满足景观娱乐和工业供水要求,与实际情况基本吻合;该方法应用于水环境质量评价中是有效、可行的。

In view of the previous whitenization weight function of grey evaluation mainly through measuring index coefficient of grey cluste-ring decision were the pros and cons of evaluation objects strength,it used to identify the level of evaluation,the center of the triangular whit-enization weight function of grey evaluation was introduced into the comprehensive evaluation of water quality,and further extended the whit-enization weight function of grey triangle calculation method and completed evaluation objects and level of accurate positioning and comparison sort. The method was applied to the water quality evaluation of Dongchang Lake in Liaocheng City of Shandong Province. The calculation re-sults show that the water quality of 21-Arch Bridge of Dongchang Lake in May belongs to class II. The lake water quality meets the demand of landscape entertainment and industrial water supply,and roughly tallies with the actual situation. The method applying to the water envi-ronment quality evaluation is effective and feasible.