Numerical Simulation of Different Drip Irrigation Schemes for Oases of Arid Region in Northwest China
- 出版年：2005
- 作者：GAO Yan-hong；CHENG Guo-dong；LU Shi-hua
- 单位1：Cald and Arid Regions Emnrenmenml and Engineering Research lnseuate, Chinese Academy of Science
- 单位2：State Key Lahararory of Frozen Soil Engineering, Chinede Academy of Science
- 出生年：1973
- 语种：英文
- 作者关键词：land surface process；MM5； irrigation；soil moisture
- 起始页：500
- 总页数：5
- 经费资助：This research was co supported by the Orientation Innovative Project of Cold and Arid Regions Environmentcl and Engi-neering Reserch Institute (2004109)and the National Natural Science Key Fundamental Project (40233035)
- 刊名：中国沙漠
- 是否内版：否
- 刊频：双月刊
- 创刊时间：1981
- 主办单位：中国科学院寒区旱区环境与工程研究所
- 主编：王涛
- 地址：北京市东黄城根北街16号
- 邮编：100717
- 卷：25
- 期：4
- 期刊索取号：P\222.06\141-1
- 核心期刊：中国自然科学核心期刊
摘要
Sod moisture maintenanre is very important for the plant growth in arid regions. For the hottest 10 days(July 21～31, 2002), soil volumetric water content, sensitive and latent heat flux over oasis situated in the middlereaches of the Heihe River basin, were simulated for a range of drip irrigation schemes using the nos-hydrostaticmesoscale atmospheric model MM5 with 1 km horizontal resolution. From the 10-day simulation, the following re-sults were obtained that 500 m3 · hm-2 would be appropriate to maintain stable and sufficient soil moisture for oasis.A greater volume of irrigation water would not only waste water resources but also increase soil moisture to satura-tion levels, lower soil oxygenation and harm crops. While with lesser volume, evapotranspiration would exceed thewater input, leading to drought conditions. Additionally, the 500 m3 hm -2 weter for July 21～31 is only half of theminimal quota and one-third of maiunial quota for traditional irrigation over the same period. So drip irrigation isclearly a water-saving irrigation method, which could allow significant savings of the limited water resources in thearid region of Northwest China.