1961-2010年怒江流域降雨时空变化

在全球变暖的背景下，为探讨高原水系水资源的重分配利用，选取怒江流域作为研究对象，研究怒江流域的降雨时空变化。基于怒江流域13个雨量站点中6个站点的50 a降雨数据，采用反距离权重插值法、Kendall非参数检验、线性回归法对流域内年际降雨特征、年内强度特征和极端降雨事件进行了分析。结果表明:怒江流域上游（青藏高原东南区）降雨量小，年内降雨集中性总体趋势减弱；流域中游（青藏高原与云贵高原过渡区）降雨量较为丰富，年内降雨强度趋势上升；流域下游（云南泸水县六库以南区）降雨量最为丰沛，降雨集中性趋势平稳；流域内3片区极端降雨事件均呈上升趋势。综上所述，西藏地区应当注意保水、节水，西藏云南交界过渡区注意预防水土流失与水土综合治理，流域内云南剩余地区应当注意防洪与泥石流治理。

Spatial and Temporal Change of Rainfall in Nujiang Basin in Recent 50 Years

In order to investigate the spatiotemporal changes of rainfall in the Nujiang River Basin, based on the 50-year rainfall data of 6 stations of 13 rainfall stations in the Nujiang River basin, the interannual rainfall characteristics, intra-annual intensity characteristics, and extreme rainfall events were analyzed using inverse distance weight interpolation, Kendall non-parametric test, and linear regression analysis. The results showed that the rainfall in the upper reaches (northwest) of the Nujinag River Basin was small, and the overall trend of rainfall concentration decreased during the years; rainfall was rich in the middle and lower reaches (central) of the basin, and the intensity of rainfall increased during the years; the rainfall in the lower reaches (southeast) of the river basin was the most abundant, and the trend of rainfall concentration was stable; extreme rainfall events in the three areas in the basin all showed the rising trend. In summary, the attentions should be paid to water conservation in the Tibet region, to the prevention of soil erosion and the comprehensive management of water and soil in the Tibet-Yunnan border and the Gongshan region and to flood control and mudslide control in the rest basin of Yunnan.