一种新内梅罗指数法的修正方法及应用

A new improvement of Nemero index method and its application

针对内梅罗指数法的Fi值在各级水质指标临界值附近突变、计算得出F值与地下水质量分级标准不匹配和Fmax对F值影响过大的问题,提出一种新的修正方法。该方法在不改变Fi期望值的前提下使Fi连续,并适当增加了对F值的影响。将该方法应用于研究区地下水综合评价,结果表明,修正后F值更加连续、均匀,并平衡了和Fmax对F值的影响,使得修正后的F值能够更加客观地反映地下水质量状况。

The Fiof Nemero index method mutates at all levels close to the threshold value of water quality.The calculated F does not match with the classification of groundwater quality standard,and Fmaxhas excessive influence on F. In order to solve these problems,a new improvement of Nemero index method has been proposed. On the premise of not changing the expected value of Fi,this method makes Ficontinuous,and appropriately increases the influence of 珔F on F. This method is applied to the comprehensive evaluation of groundwater in the study area. The results show that after improvement,F becomes more continuous and uniform,and the balance of the influence of F and Fmaxon F has been improved. The improved F reflects the status of groundwater quality more objectively.