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应用具有决策支持系统(DSS)功能的SEDAM模型模拟黄河上游惠农引黄灌区的灌溉需求与渠系输配水状况,利用节水多准则分析方法评价农田与输配水系统的改善方案。以田间实测的各类典型数据资料为基础,采用随机方法生成与田间和各级渠道相关的数据,产生用于多准则分析的属性数据和性能指标。根据不同水平的与农田及输配水系统相关的决策变量,设计了8种用于改善农田与输配水系统的模拟方案,通过模拟的需水量与现状供水量之间的对比以及模拟的各类效用值随时间变化的趋势,对模拟结果进行分析。结果表明,采用改善的农田与输配水系统运行方案可有效地减少惠农灌区的灌溉弃水和渠系输水渗漏量,较好地控制田间深层渗漏与地表径流损失,达到节水增产、改善农田生态环境的目的。
SEDAM model with decision support system (DSS) was used to simulate the irrigation demand and canal water distribution in the Yellow River irrigation works in benefit area and the improvement plan of farmland and water distribution system by using multi-criteria water-saving analysis method. Based on all kinds of typical data measured in the field, a random method is used to generate data related to field and various channels, and generate attribute data and performance indexes for multi-criteria analysis. According to different levels of decision-making variables related to farmland and water distribution system, eight kinds of simulation schemes for improving farmland and distribution system were designed. By comparing the simulated water demand with the current water supply, The trend of the class utility value changes with time, the simulation results were analyzed. The results show that the improved operation schemes of farmland and water distribution system can effectively reduce the irrigation and drainage losses and drainage losses in the canal irrigation and control the deep seepage and surface runoff losses in the field and save water Increase production, improve farmland ecological environment purposes.