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Water environment of irrigation and drainage systems and optimal water control in flat low-lying areas along a coastal zone

沿海平坦低洼地区排灌水环境及优化控水

基本信息

批准号：
08456121
负责人：
SHIKASHO Shiomi
金额：
$ 3.71万
依托单位：
Kyushu University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1998
项目状态：
已结题

项目摘要

In flat low-lying areas along a coastal zone, the optimal control of irrigation and drainage systems for water-environmental conservation depends on the accurate understanding of flow regimes. During the high water season, a quantitative understanding of flood runoff phenomena is required in particular for optimal control of drainage systems. On the other hand, during the low water season, the physical dynamics of water quality must be considered to maintain good water quality because of the influence of stagnant water and oceanographic phenomena.In this study, we examined the characteristics of flow regime and the physical dynamics of water quality in flat low-lying areas along a coastal zone, and numerical models were obtained to predict optimal water environment and control irrigation and drainage systems.First, Artificial Intelligence models were applied to predict water-stages in a tidal river. It was suggested that Al was an effective technique for the short-term prediction of the boundary conditions that should be used when controlling irrigation aid drainage systems optimallySecond, the transport of dissolved matter in a stagnant body of water was investigated using flume experiments and field observations. It was concluded that the vertical and horizontal transport of dissolved matter was characterized by convection due to the heating and cooling of the water surface aid wind-induced flow The transport of suspended matter in an open channel flow was also investigated with experiments. The transport of suspended matter could be explained in terms of the dynamical structure of shear flow.Finally, based upon the above mentioned results, an expert system for the optimal control of irrigation and drainage systems for water-environmental conservation was successfully constructed using the fuzzy control theory.

在沿着平坦低洼地区，灌溉和排水系统的水环境保护的最佳控制取决于对水流状态的准确理解。在高水季节，洪水径流现象的定量了解，特别是需要排水系统的最佳控制。另一方面，在枯水季节，由于滞水和海洋现象的影响，必须考虑水质的物理动力学以保持良好的水质。在本研究中，我们研究了沿着平坦低洼地区的水流状况和水质的物理动力学特征，首先，应用人工智能模型预测感潮河流的水位。本文提出，人工智能是一种有效的边界条件短期预测技术，可用于灌溉辅助排水系统的优化控制。其次，采用水槽试验和野外观测相结合的方法，研究了滞水水体中溶解性物质的运移规律。结果表明，溶解物的垂向和水平向输运主要是由水面加热和冷却引起的对流和风激流共同作用的结果。本文还对明渠悬浮物的输运进行了实验研究。悬浮物的输移可以用剪切流的动力结构来解释。最后，在上述研究结果的基础上，利用模糊控制理论成功地建立了一个水环境保护排灌系统优化控制专家系统。