在我国目前已开发的灌区中,往往由于取水枢纽上游陆续修建其它中小型农田水利工程,使水源来水日趋减少,而灌区面积又在逐年扩大,致使不少灌区的来、用水矛盾比较突出,不得不考虑灌区扩建改建或灌区范围的重新调整,这是当前灌区管理中经常遇到的一个问题。 In the irrigated areas that have been developed in our country at present, water conservancy projects such as other small and medium-sized farmland water conservancy projects are often constructed in the upper reaches of the water intake hubs to reduce water inflow and water drawdown, and the area of ​​irrigated areas is expanding year by year, resulting in prominent contradictions of water supply and drainage in many irrigated areas. Have to consider the expansion of irrigation areas to rebuild or re-adjust the scope of irrigation, irrigation management is the current management of a problem often encountered.