改进的灰色关联度分析在地表水环境质量评价中的应用

灰色关联度分析广泛应用于地表水环境质量评价。它的特点是从与水质标准的关联度关系上评价地表水环境的质量，但其存在不同层次上的缺陷。笔者对该方法进行了改进，考虑水质评价标准的区间形式，而且采用“中心化”无量纲化方法，使得计算结果比原方法更具有区分性。实例证明该方法在评价水质时具有较强的合理性和可行性。

The Application of Improved Grey Association Analysis in the Surface Water Environmental Quality Assessment

Grey association analysis has been widely applied to surface water environmental quality assessment.It is characterized by carrying out evaluation from the correlation relationship between the quality of surface water environment and the water quality standards,but it has many defects at different levels.In order to overcome the defects of the traditional grey association analysis method,some improvements are put forward,such as considering the interval form of evaluation standards of water quality and adopting centralized dimensionless method,with which the results are more distinguishable than those obtained from the traditional method.The results of a practical example show that this method is more reasonable and more feasible.