湖泊营养状态评价的普适指数公式及效果检验

AN UNIVERSAL INDEX FORMULA OF EUTROPHIC STATE EVALUATION OF LAKES AND ITS EFFECT VERIFICATION

适当设定湖泊富营养化指标“参照”值 ,将修正的Carlson指数公式中的指标值用相对于“参照”值的指标“相对值”替换 ,公式中的参数可视为与指标特性无关。对公式中的待定参数采用遗传算法进行优化 ,得到对多项指标都通用的营养状态普适指数公式。用折衷激励功效函数法对单项指标的TSIG 指数赋权 ,计算综合指数。公式的正确性已被用于我国数十个湖泊、水库的营养状态评价检验得到证实。该公式计算简单、实用 ,具有客观性。

Based on the hypotheis of “base values” of eutrophication indexes,an universal Carlson's index formula,in which parameters are independent on the characters of indexes,was presented for the eutrophic state of lakes,as the relative values of indexes were used instead of their monitoring values.optimization of parameters in formula was carried out using genetic algorithm to derive an universal formula of evaluation of lake eutrophication suited to multi index.The comprehensive index of lake eutrophication can be calculated in the aid of the compromise active function weightting for each index.The correctness of formula was verified using this method to assess the eutrophic states of many lakes and reservoirs in China.The results show the simplicity for calculation,practicality,generality,comparability and objectiveness.