青海省香日德河谷灌区典型地块作物耗水试验与模拟研究

在对青海省香日德河谷灌区典型地块进行引退水监测试验的基础上,分别采用引排差和VSMB模型2种方法开展耗水系数计算。2种方法计算得到的灌区典型地块2014年耗水系数分别为0.908和0.938,差值仅为0.03。研究区内计算耗水系数时,VSMB模型的方法可以对引排差法进行较好的验证。研究可为灌区及黄河流域水资源合理利用和优化配置提供技术支撑。

Study on Crop Water Consumption Monitoring Test and Simulation of Typical Plot of Xiangride River Valley Irrigation Area in Qinghai Province

On the basis of monitoring the surface diversion and drainage water, the two methods of diversion and drainage and VSMB model were adopted to calculate the crop water consumption coefficient of typical plot of Xiangride river valley irrigation area in Qinghai Province.The crop water consumption coefficient in 2014 calculated by diversion and drainage method and the VSMB model method were 0.908 and 0.938 respectively, whose difference was only 0.03.The VSMB model method could lead better validation to the diversion and drainage method for crop water consumption coefficient calculation in the scope of the study area.The study can provide technical support for reasonablely using and optimally allocatiing water resources of the irrigation area and the Yellow River basin.