EVALUATION OF PUBLIC WELEARE IN AGRICURTURAL INFRASTRUCTURE.IRRIGATION GANALS IN KITAMI-SITY

本研究的目的是评估农业基础设施，特别是农业灌渠的公共福利。案例研究应用于北上市。Kitam在几年前就完成了建设农用灌溉渠的市民公园的项目，所以人们对运河附近公园的意见到目前为止已经得到了确认。方法是条件价值评估法，这是对公共物品的公共福利进行评估的一种常用的、合适的评估方法。园内建有农用灌溉渠。问卷共对465户家庭进行了测试，有效答案为459份，效度为98.7%。422户农户对农用水渠公园的评价为正面。接下来，我们估计了农业灌溉渠道对公园的总经济价值，因此每年的总金额约为110万日元。

The purpose of this research project is to evaluate the public welfare of agricultural infrastructure, especially agricultural irrigation canals.The case study is applied in Kitami city.Kitam's projects to construct the citizen park used with agricultural irrigation canals have completed some years ago, so people's opinions for the park near the canals are confimed so far.The methodology is CONTIGENT VALUATION METHOD which is the common and appropriate valuation method to estimate public welfare of public goods, eg.the park used with agricultural irrigation canals.The questionnaire is tested to 465 household, and valid answers is 459 (the rate of validity, 98.7%).The positive evaluation to the park used with agridultural irrigation canals are shown in 422 householders.Next, we estimated the total economic value of agricultural irrigation canals to park, so that the total amount was about 1.1 million-yen per a year.