基于RS/GIS的海岛雨水资源潜力估算

Potential Estimation of Rainwater Resources in Island Based on RS/GIS Technology

利用北长山岛1971～2010年的降水数据，分析了该岛降水的年际变化特征和年内月平均降水量特征；利用RS／GIS技术对北长山岛TM遥感影像的土地覆盖类型进行了分类，主要分为林地、灌木林地、农田以及居民区和裸地四类；结合降水以及土地覆盖类型数据，对北长山岛的雨水资源总量、雨水资源理论潜力和雨水资源实际潜力进行了估算。本研究方法及结果对海岛地区雨水资源利用理论以及雨水收集工程的建设具有重要的指导意义。

Based on the data from 1971 to 2010 of Bei Changshan Island, the annual and monthly varia- tions of precipitation were analyzed in this paper. The TM remote sensing images of Bei Changshan Island were used to classify the land cover categories using RS/GIS technology. Four categories were obtained including forest land, shrub land, farmland and residential and bare land. Combined with the data of precipitation and land cover types, the total amount, theoretical potential and actual potential of rainwater resources were esti- mated. This calculation method and results would have important guiding significances to the theory of rainwa- ter resource utilization and the construction of rainwater collection projects.