Mann-Kendall检验法在新西河水库富营养化趋势分析的应用研究

Application Research of Mann-Kendall Test Method in the Analysis of Eutrophication Trend of Xinxihe Reservoir

在水库富营养化研究中,一般常采用营养状态指数对水库营养状态进行分级,然后采用变化趋势与倾向率法判断富营养化趋势。该方法能够直观反映整个分析时段内营养状态指数的升降趋势,但无法反映不同时段内营养状态指数的升降趋势。Mann-kendall趋势检验法和突变分析法则弥补了该缺点。

In the eutrophication study of reservoirs,the eutrophication index is often adopted to classify the eutrophication of the reservoir,and then the change trend and inclination rate method are used to judge the eutrophication trend.The method can intuitively reflect the ascend and descend trend of the eutrophication index in the whole analysis period,but it can’t reflect that of which in different periods.Mann-kendall trend test and Mann-kendall mutation analysis methods can make up for this shortcoming.