Study on the Application of Long Term Runoff Analysis to Regional Environmental Impact Assessment

土地开发改变了各种自然环境。本研究的目的是将串联槽模型方法应用于土地开发的长期径流影响评价，并验证其应用的实用性。本研究使用的油罐模型为四级串联油罐模型。采用的调查方法如下：1。在一组模型参数的识别上，作者提出了两种识别技术，即土地开发对第一储罐上侧翼孔参数的影响。第一个技术在开始时分析了主题流域的个别年份的长期径流。然后，从识别出的各个年份的参数中，反复搜索除第一个罐的上侧翼孔参数外的每个参数的盆地唯一值。通过上述搜索，每年对第一罐的上侧翼孔参数进行了不同程度的识别。第二种技术是将收集的中断年长期径流数据中除第1罐上侧翼孔参数外的参数识别为一组。采用与第一种技术相同的方法，每年对第一罐的上侧翼孔参数进行不同的确定。在本次调查中，土地利用转型的典型指标是人口和户数动态统计、农用地转型。上侧翼孔参数随年份的变化而变化。并认为所得结果与土地利用转型指标相符合。

The land development changes variously matural environment. The purpose of the present investigation is to apply the series tank model method to long term runoff impact assessment on the land development and to prove really the utility of its application. The tank model used in this investigation is a four-stage series tank model. The techniqus of investigation was carried out as follows :1. On the idntification of a set of model parameters, the author made two idntification techniqus which the influence of land development appeared on the upper flank hole parameter of the first tank.2. The first techniqu analysis the long term runoff of individual years from the subject basin at the beginning. Next, it searchs repeatly the basin unique value of each parameters but the upper flank hole parameter of the first tank from the identified parameters of individual years. As a result of the above stated searching, the upper flank hole parameter of the first tank is identified variously each years.3. The second techniqu identify the parameters but the upper flank hole parameter of the first tank from the collected interrupting year's long term runoff datas into one group. In the same manner as the the first techniqu, the upper flank hole parameter of the first tank is identified variously each years.4. In this investigation, the typical indexs of land use transition are the dynamic statistics of population and the number of households, the transition of agricultural land use.5. The values of the upper flank hole parameter changed as the year goes on. And the result obtained was considered to correspond with the indexs of land use transition.