DEVELOPMENT OF THE RIVER CHANNEL DESIGN SUPPORT TOOL IN FOR THE RIVER ENVIRONMENT IN THE SMALL AND MEDIUM SIZE RIVER

Abstract

The purpose of this paper is to develop the simulation tool to evaluate the results of hydrological regime and river habitats seamlessly. The evaluation tool can be visualized the results. The river habitats tool consists of habitat suitable index model of freshwater fish and the growth judgement model of river terrestrial plants in water. We examined validity of these tools by 3 models changed the width of a river. As a result, the model which widened the width of a river can be increased suitable habitats for fish, it however were covered with a plant too much. These tools will enable a river environmental planning to estimate quantitatively as well as a flood-control planning.