The average aridindex was 0.002, with a maximum of 0.581 in the lower Minqin region.
历年气候干旱指数平均为0.002，极值出现在下游的民勤地区，达0.581。
2
With a view to the arid-wet index constructed by precipitation and evaporation synthetically, it may be objective to reflect the climate arid-wet evolution characteristics in northwestern area.