Wavelet-Stochastic Coupling Model and Its Application for Forecasting Groundwater Level in Well Irrigation Area in Sanjiang Plain
Qiang Fu · Shuxue de shijian yu renshi · 2008
The rapid increase of paddy field acreage has led to widely descending of groundwater level in area of well irrigation paddy in Sanjiang Plain recent years.More and more hanging pump and partial overpumping have been occurring in area of well irrigation paddy.In order to solve above-mentioned problems,this paper took Farm 853 as example,through applying the wavelet theory and stochastic hydrology method to build up the wavelet-stochastic coupling model that can forecast the monthly groundwater embedment depth after the difference treatment towards the actual observation groundwater embedment depth datum.The results of precision test show that this model had upper validity and reliability.The forecasting results show that the groundwater level of Farm 853 would continually descending in the future if this area still applies the foregone groundwater exploitation mode.Therefore,the author suggests that this area should increase the groundwater resource scientific management.This model revealed the region′s groundwater dynamic variation regularities.The study can provide scientific gist for sustainable utilization of groundwater resource in Farm 853 so much as the entire Sanjiang Plain.