以沈阳地区为例,采用GM(1,1)模型和两次拟合参数法建立水稻需水量预报模型,并用时间序列方法修正其残差,预报效果较好。通过系统建模,为制定科学的节水灌溉制度和地区节水灌溉规划提供重要的科学依据。
The paper is taking Shenyang area as an example, paddy water requirement forecasting model is established base on GM ( 1, 1 ) model and method of two times fitting parameters , revising the difference by time series analysis method, the result is better. Through studying for systematic model, the study give out scientific basis for making the scientific water - saving irriga- tion system and regional water - saving planning of irrigation.