Study on irrigation-and-drainage management systems for regional water environmental control

首先，通过对专家的访谈，制定了一个专家系统模型，其中包括的过程，如：诊断的主题区域输入到系统中的专家，估计该地区的未来变化的系统，并选择最佳的措施，以改善估计的未来状态以下的决策树的各种项目元素安排从顶层的粗略计划，在尾部的水平。通过对专家系统模型的模拟试运行和模型修正，分析了灌溉渠系改革工程规划编制专家的思维过程，并从灌溉系统现代化的角度，分析了区域水管理系统的形成过程，探讨了今后的发展方向。通过实地调查，分析了灌排渠道周围的水环境条件，估算了滨水区的经济价值;在明渠非恒定流计算中，考虑了与水工建筑物相对应的4种内边界条件，提高了内边界条件下数值计算的收敛性。最后，针对水质问题，从某水库和某入库河流中采集了大量瓶装水样品。他们的检验表明，水质水箱模型可以精确地再现这种现象。

First, by interviews on experts, an experts system model was formulated which included processes such as: diagnosis of the subject region input to the system by experts, estimation of the future change in the region by the system, and selection of the best measures to improve the estimated future state following a decision tree made of various project elements arranged from rough plans in the top level to detailed ones in tail level. And planning experts' mind processes were analyzed for irrigation canal reform projects' draft planning by iteration of a simulation test run and model revision of an expert system model.Next, from a viewpoint of modernization in irrigation systems, formation process of regional water management system was analyzed and future desirable development was investigated. And waterfont environmental conditions around irrigation & drainage canals were analyzed through field survey, and economical value of waterfront was estimated.As for the unsteady flow calculation in open channel, four interior boundary conditions corresponding to hydraulic structures were examined to improve numerical convergency at interior boundary conditions. And two effective measures were devised.Finally, concerning to the water quality, many bottles of water were sampled from a reservoir and a river flowing into the reservoir. Their examination showed that water quality tank model can reproduce the phenomena precisely.