利用西双版纳人工橡胶林集水区(1993-2008年)的连续观测资料,分析橡胶林集水区的降雨量、径流深度、无径流日和径流系数特征。结果表明:橡胶林集水区年降雨量(1 510.6 mm)、年径流深度(361.3mm)、年无径流日(80.4 d))和年径流系数(0.235)具有年间差异和显著的季节动态。年、季节尺度的降雨量对年、季节的径流深度和无径流日的影响有差异。人工橡胶林小流域集水区降雨和径流在雨季集中,干季降雨和径流输出少,尤其是在干热季和雨季前期,无径流日多,使得橡胶林干热季和雨季前期发生长期的断流现象,形成区域性的间断性水资源短缺。因此,大面积的橡胶种植将对西双版纳地区水资源尤其是干季水资源,利用产生不利影响,造成干季严重的水资源危机。
In the study,rainfall and runoff data(1993-2008) by continuous observation were analyzed in order to map the characters of runoff and the hydrological effects in a small catchment of rubber plantation in Xishuangbanna,southwest China.The results showed that:With seasonal and annual dynamics,annual rainfall,annual runoff,annual runoff coefficient,and zero runoff days was 1 510.6 mm,361.3 mm,0.235 and 80.4 d respectively in the small RP catchment in Xishuangbanna.There were differences among the correlations between rainfall and runoff depth,and zero runoff days in season and annual.Conclusion of the research was that:Because most of the annual rainfall,annual runoff and fewer of annual zero runoff days were occurred in rainy season,and the fewer annual rainfall and annual runoff,and annual zero runoff days were mainly in dry season,there was drought crisis in Xishuangbanna,especially in dry hot season,which indicated drought in dry season in rubber plantation and the negative effect on local water resource might be due to increasing rubber planting in Xishuangbanna.