南水北调大面积农业灌溉的区域气候效应研究  

Regional climate effects of large-scale agricultural irrigation related to South-to-North Water Transfer Project in China

作　　者：李建云[1,2] 王汉杰[2] 

机构地区：[1]解放军理工大学气象学院,江苏南京211101 [2]空军装备研究院航空气象防化研究所,北京100085

出　　处：《水科学进展》2009年第3期343-349,共7页Advances in Water Science

基　　金：国家自然科学基金资助项目(40675040);国家重点基础研究发展计划(973)资助项目(2006CB400505)~~

摘　　要：基于社会经济学模型对中国未来不同社会经济发展情景下土地利用变化的预测资料,利用区域气候模式RegCM3,重点研究了南水北调工程建成后,对中国北方13个省(区)范围内农田、农林混作区和草地等进行大面积灌溉所产生的区域气候效应。结果显示:大面积农业灌溉对中国区域气候影响明显,主要受灌区及其邻近地区土壤湿度、近地层空气湿度、总云量、潜热通量、降水量等均呈增加趋势,地表温度、感热通量及500 hPa位势高度将降低。灌溉后受灌区土壤湿度的增加,不仅使受灌区气候环境发生变化,还通过动量、热量及水汽交换对邻近地区气候产生影响。The social-economic dynamic model （SEDM） reflecting land use and land cover （LULC） variation is coupled with the regional climate model （RegCM3） and used to simulate the regional climate change in north China as if a large scale of agricuhure and pastureland is irrigated after the completion of the South-to-North Water Transfer Project （SNWTP）. The prelim- inary simulation results show that the large-scale agriculture irrigation might cause significant regional climate change in China. During the most possible irrigation time of summer months from June to August, the ground temperature, sensible heat flux as well as the potential height at 500 hPa are all decreased within the irrigated region and the adjacent areas, while the low-level air humidity, cloud cover, latent heat flux and precipitation are all increased. The large-scale agricuhuml irrigation not only changes the water vapor factors of soil moisture and air humidity, but also the thermal factors, such as temperature, the sensible heat flux, the dynamic factors of potential height and wind field in the atmosphere, which cause the regional climate change in the whole numerical domain.

关 键 词：气象学 水资源 环境影响与保护 气候效应 农业灌溉 南水北调 

分 类 号：P435[天文地球—大气科学及气象学]