农作物分布对南水北调受水区域 陆面过程模拟的影响

本文将中国陆面覆盖资料(CLCV)与全球农作物分布资料融合，获取了一套包含小麦、玉米和水稻这些农作 物分布的陆面覆盖资料(CLCV- 3C)，并将该陆面覆盖资料以及CLCV 应用于陆面模式CLM针对南水北调受水区域 的数值模拟试验以探讨该区域农作物分布对陆面能量水分过程模拟的影响。结果显示，与原来没有区分这三种主 要农作物分布相比，考虑农作物分布后，小麦区模拟的多年平均净辐射、感热、径流会增加，而蒸散发会减少；玉米 区和水稻区的多年平均净辐射、感热、蒸散发均会增加，而径流会减少。这些研究表明，农作物分布对南水北调受水 区域陆面水分能量过程有不可忽视的影响。

Effects of Crop Distribution on Land Surface Simulations over the Intake Area of the South-to-North Water Transfer Project

In this paper,we develop a crop distribution data(CLCV-3C) base on the Chinese Land Cover data(CLCV) and the global crop distribution data developed by SAGE at the University of Wisconsin-Madison,and investigate the effects of crop distribution on land surface simulations over the intake area of the South-to-North Water Transfer Project using the NCAR/CLM model with the two land cover data.The numerical results show that the crops affect the energy and water balance over the intake area of the South-to-North Water Transfer Project differently;the simulated net radiation,sensible heat,runoff increase,and evapotranspiration decrease in the wheat area,while the simulated net radiation,sensible heat,evapotranspiration increase and runoff decrease in the maize and rice area;the effect of crop distribution on energy balance is greater then that on water balance.