ISAREG模型在灌区土壤墒情预报中的应用研究  

Study on Application of ISAREG Model in Soil Moisture Forecast System of Irrigation Area

作　　者：霍轶珍 李生勇 郭彦芬 

机构地区：[1]内蒙古河套学院土木工程系,内蒙古巴彦淖尔015000

出　　处：《人民黄河》2017年第12期157-160,共4页Yellow River

基　　金："十三五"国家重点研发计划项目(2016YFC0400205);内蒙古自治区高等学校创新团队发展计划项目(NMGIRT-D1611);河套学院校级重点课题(HTXYZZ13002)

摘　　要：土壤墒情预报是农田土壤水分调控的基础和前提。针对当前灌区土壤墒情监测工作量大且预报精度不高的问题,采用数值模拟和农田实测数据相结合的方法,应用以水量平衡法为基本原理的ISAREG灌溉模型进行灌区土壤墒情预报,并利用内蒙古河套灌区沙区灌溉试验站的大田实测数据对ISAREG模型的模拟精度进行验证,结果表明:ISAREG模型能较好地模拟作物土壤含水率的动态变化,模型输出的模拟值与实测值对比,回归系数约为1.02,决定系数在0.6以上,误差在10%以内,表明该模型参数经过校准和验证后,可以用来进行土壤墒情预报。该模型还具有识别作物是否处于水分胁迫状态,并对作物灌溉制度进行评价和优化的功能,可进行灌区灌溉预报。The soil moisture forecast is the basis and premise of fary nland soil moisture control. In order to solve the problem of heavy work-load of soil moisture monitoring and forecasting and its low accuracy, this article combined the numerical simulation and the measured data, applied ISAREG model based on water balance of farymland and used the obseryed field data of irrigation experimental station in Hetao irriga-ted area of Inner Mongolia to forecast the soil moisture. The results show that the ISAREG model can simulate the dynamic change of soil moisture content very w,ell, regression coefficient of comparing simulation value and measured values is about 1.02, decision factor above 0.6 and the error is within 10%. Therefore,ISAREG can be used for prediction of soil moisture after calibration and verification show that the model parameters,moreover,the model is able to recognize whether crop is under water stress, and to evaluate crop irrigation system and op-timization function of irrigation. It is very recommended that all data relative to the model should be monitored to improve accuracy in forecas-ting soil moisture,and to instruct the management in irrigation district.

关 键 词：ISAREG模型 墒情预报 水量平衡 河套灌区 

分 类 号：S274[农业科学—农业水土工程]