STUDY ON THE RIVER HABITAT EVALUATION METHOD CONSIDERING FISH MIGRATION BASED ON ENVIRONMENTAL PREFERENCE

Abstract

The purpose for evaluate the river habitat considering fish migration, we develop the fish migration simulation method based on environmental preference. We use 3 layers data (surface, middle, bottom of depth) of target area, and build the 2-dimensional physical-environmental in formations by Geographical Information System (GIS). Then we calculate and plot the fish migration root by Visual Basic for Applications on GIS. At the same time, as we make the graph of environmental preference on that fish migration root automatically, we can find the bottleneck of fish migration. Then we simulate about Fishway which we did the investigation, and compare simulation result and investigation data.