Study on the Forecast Model of Reference Crop Yield in Jinghuiqu Irrigation Area Based on Weather Forecast
Under the background of agricultural water saving,the prediction method of reference crop evapotranspiration in Jinghuiqu irrigation area was studied.Hargreaves-Samani formula was selected as the prediction model.The meteorological data of Jinghe station in China Meteorological Data Network from 2008 to 2020 were used for SPSS parameter inversion,and the measured meteorological data in 2022 were used for verification.The results showed that the Hargreaves-Samani model parameters suitable for Jinghuiqu irrigation area were C=0.00122,a=14.19,m=0.259.Through verification,the relative error of 83.2%verification value is within 20%.At the same time,it shows that the Hargreaves-Samani model presents the accuracy distribution law of'summer>spring>autumn>winter'when predicting the reference crop evapotranspiration,which can provide practical theoretical basis for irrigation forecasting and intelligent water conservancy development in irrigation areas.
Jinghuiqu Irrigation Districtreference crop yieldforecast modelhargreaves-Samani formula
万方数据
维普
