地理地形因子对长江中下游平原降水空间分布影响的估算和分析

Estimation and Analysis for Geographic and Orographic Influences on Precipitation Distribution on the Yangtze Plain,Middle and Lower

以长江中下游平原为研究区,采用2001 ～2010十年的降水整编资料、NCEP风向资料以及DEM数据,利用偏最小二乘法（PLS）对长江中下游平原一月、四月、七月、十月的降水空间分布与地理地形因子及风向因子的关系进行分析、检验和讨论.结果表明：与普通克里格插值法对实测降水量进行降水空间分布估算结果相比,加上地理地形因子及风向因子后的PLS回归模型更能直观反映出该区降水空间分布受到局部地理地形因子及风向因子综合影响的特征,其结果能为该区实行因地制宜的工农业生产提供科学的指导.

The precipitation reorganization information of 2001,wind data provide by the NCEP of 2001 ～2010 and data of DEM are used to investigate the relationship between precipitation spatial distribution and geographical terrain,wind direction of the lower reaches of the Yangtze River plain in January,April,July and October by PLS.The result shows the estimation model can estimate the rainfall spatial more accurate,which can guide the construction of industrial and agriculture in the lower reaches of the Yangtze River plain.