Progress of Urbanization and Regulation of Water Uses in the Land Improvement District

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The present study is the consideration of various aspects of the regulation of water uses in the land improvement district following the progress of urbanization from the three case studies.The common points clarified in these three case areas are :1) Water use management has tended to be less cared for, due to the decrease of the area of benefit by the increase of part-time farmers and the transfer of farm land following urbanization.2) Great importance is attached to the function of maintaining environment which the land improvement district has with it.From the above-mentioned two points, in each land improvement district demand for official charges from public administration (i.e. cities, towns and villages) and for charges from non-association-member beneficiaries has come into being. But the charge proportion and the standard are determined by the developing degree of urbanization as in the case of Meijiyosui Land Improvement District where Toyota Motorcar Factory works. Also the historical and geographical conditions cannot be ignored as determining factors. In Nishikanbara Land Improvement District which lies in the drainage area, expense of electricity has been increased by the operation of the draining pump and the principle of official charge from the urban area has been strictly adopted.Conversely, in Toban Land Improvement District which lies in the irrigation area, vivification of the land improvement district is designed by the transfer of irrigation water to urban water and the use of Tojoko (Lake) for recreation, though non-member charges are paid for the use of waterway facilities.