Geographical Study on Multipurpose Utilization of Irrigation Pond

灌溉池塘除了农业供水外还有多种功能，利用这些功能对灌溉池塘的维护是有效的。本研究通过对利用灌溉池的多种功能的综合利用案例进行分析，明确了实现这种利用的因素和利用的效果，归纳为以下三点。首先，实现灌溉池塘多目标利用的最大因素是调整农业水权人与新用水者之间的利益关系，特别是严格保障水权。二是地方政府的财力，使其有能力进行全面修复和综合利用的建设，以确保池塘的安全，因为这是池塘综合利用的主要前提。第三，通过对爱知县东海暴雨灾害中灌溉池塘防洪功能的实例分析，指出灌溉池塘的防洪调节作用。

The irrigation pond has multiple functions besides the agricultural water supply, and the use of these functions is effective to maintain the irrigation pond. In this research, the cases with multipurpose use that used multiple functions of the irrigation pond were analyzed, and the factor that such use was achieved and the effectiveness of the use were clarified.In conclusion, they are the following three points. First, the maximum factor to achieve multipurpose use for the irrigation pond is to adjust the interests between holders of agricultural water rights and new users, especially to guarantee water rights severely. The second is financial power of the local government to be enforceable of the construction for the overall repair work and multipurpose use to secure the safety of the pond because it becomes the major premise of multipurpose use for the pond. Thirdly, the effect of the irrigation ponds of the flood adjustment, was able to be pointed out from the case analysis in Aichi Prefecture about the flood control function of the irrigation ponds at the disaster of Tokai Downpour.