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1. 发明授权

US11300430B2 Method for irrigating farmland 有权
公开(公告)号：US11300430B2
公开(公告)日：2022-04-12
申请号：US16304447
申请日：2016-06-30
申请人： China Institute of Water Resources and Hydropower Research
发明人： Shaohui Zhang , Di Xu , Wei Dai , Meijian Bai , Qunchang Liu , Fuxiang Li
IPC分类号： G01F1/00 , G01F23/00 , G01F1/002
摘要： A method for acquiring a canal flow rate, comprising: measuring an actual measure value of an upstream water depth and an actual measure value of a downstream water depth of a target canal; presetting the upstream canal flow rate and surface water infiltration rate of the target canal, and respectively acquiring preset values of each; substituting the actual measured value of the upstream water depth, the preset value of the upstream canal flow rate, and the preset value of the surface water infiltration rate into Saint-Venant equations, so as to solve the equations and obtain a downstream water depth simulation value of the target canal; when the relative error between the downstream water depth simulation value and the actual measured value of the downstream water depth is less than or equal to the preset threshold value, acquiring a viable upstream canal flow rate and a viable surface water infiltration rate; otherwise, optimizing the preset value of the upstream canal flow rate and the preset value of the surface water infiltration rate, and repeating the described process until the relative error between the two is less than or equal to the preset threshold value, so as to acquire the two viable results and acquire the canal flow rate at any measurement point of the target canal.

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