元谋干热河谷区蒸发量减少原因的灰色关联分析

GREY RELATED ANALYSIS ON THECAUSES OF EVAPORATIVE REDUCTIONOF DRY-HOT VALLEY IN YUANMOR

元谋干热河谷区气候炎热干燥、植被稀疏、生态系统脆弱。近２０年来蒸发量明显减少，本文采用灰色系统关联度理论，对各有关因素影响的大小进行了计算和排序。

In dry-hot valley or Yuanmou,the climate is hot and dry,the vegetation is sparse as well as the ecological environment is fragile.The evaporation has been reducing obviously these recent twenty years.This paper has used the Related-Degree Theory of Grey-Systemto calculate the influence value of relative factors on evaporation and arrange them in or-ders.