基于网格化信息的北京地区土壤墒情预报服务系统  

Beijing Soil Moisture Prediction Service System Based on Grid Information

作　　者：刘勇洪[1] 吴春艳[1] 叶彩华[1] 高燕虎[1] 权维俊[1] 

机构地区：[1]北京市气候中心,北京100089

出　　处：《中国农业气象》2011年第2期267-272,共6页Chinese Journal of Agrometeorology

基　　金：中国气象局新技术推广项目(CMATG2009MS26);科技部农业科技成果转化资金项目(2009GB24160497);北京市气象局"城市边界层观测分析与精细模式"创新团队

摘　　要：依据农田土壤水分平衡理论,引入RS和GIS技术,以图像栅格信息方式分别考虑土壤、植被和大气空间区域分布的非均匀性,以中期天气预报要素、实测土壤墒情及当前MODIS卫星遥感资料为基础,研究开发了基于IDL语言的250m空间分辨率网格信息的北京市土壤墒情预报服务系统,并在北京地区进行了气象业务服务应用和效果评估。结果表明,RS和GIS技术能有效实现土壤墒情预报信息的网格化和预报参数值的非均匀化,基于IDL语言开发的土壤墒情预报系统技术流程清晰,功能齐全,业务化程度高,系统在北京农业干旱监测和预报服务中能得到有效发挥,对与北京农田类似的地区具有推广价值。An operational grid system of soil moisture prediction system with the spatial resolution of 250m based on IDL language was developed in Beijing,basing on medium-term weather forecast,real-time observed soil moisture and MODIS satellite data.The system was based on the crop-soil water balance and the non-uniformity of spatial distribution of soil,vegetation and air conditions considered by grid information using RS and GIS techniques.The system was used by Beijing Meteorological Operation Service to provide useful directions of agricultural measures to be taken against the possible harmful effects of meteorological events.The results showed that the RS and GIS techniques could acquire grid effect of soil moisture prediction information and non-uniformity of the values of the parameters.And the system had clear technical flow,full functions and operational convenience.It could serve effectively in the agricultural drought monitoring and forecasting in Beijing and also in other areas where similar types of crop are grown.

关 键 词：墒情预报 农田土壤水分平衡 RS和GIS技术 网格化 IDL语言 

分 类 号：S152.7[农业科学—土壤学]