金沙江流域地形因子对降水量空间分布的影响  

Influence of Terrain on Precipitation Space Distribution in Jinshajiang Region

作　　者：张树奎[1,2] 鲁子爱[2] 张楠[3] 

机构地区：[1]江苏海事职业技术学院,江苏南京211100 [2]河海大学交通学院,江苏南京210024 [3]黄河水利科学研究院,河南郑州450003

出　　处：《水电能源科学》2011年第12期13-15,146,共4页Water Resources and Power

摘　　要：基于47个常规气象站点1958～2008年逐日降水资料,采用金沙江分辨率90 m的DEM数字高程模型,以逐步回归的方法构建了四季降雨量与10个地形因子的关系模型,以SPI方法分析了旱涝年因子系数的变化规律。结果表明,建立的模型诸因子平均相对误差在8%以内,四季降雨量受地理和局地因子的影响较大。According to 90m resolution digital elevation model （DEM） and the daily precipitation data of 47 meteoro logical station from 1958 to 2008 in Jinshaiiang basin, the relational model between seasonal precipitation and 10 topo graphic factors is established by using stepwise regression method. And then the variation rule of factor coefficient in drought and flood years is analyzed with SPI method. The results show that the average relative error of all factors of the model is less than 8 ~, and the seasonal precipitation is influenced by geographical and local factors.

关 键 词：金沙江 地形因子 逐步回归 SPI 空间分布 

分 类 号：P333[天文地球—水文科学]