Domestic reservoir‘s high water level fluctuation all year round is causing severe physical disturbances on
micro-habitat of organisms for spawning and inhabit. Lake Soyang has water level difference of 40m between dry and flooding season which significantly deteriorates inner Lake environment of habitat. Reduction in biodiversity occurs due to river channel breakdown into upstream and downstream after dam construction and downstream organism inhabitated environment significantly alters due to changes in physical environment according to dam outflow. In this study, we developed the structures and guidelines for complex and alternative biological habitats of organism, ecological wetland and organism movement pathway to improve the inhabitated environment. Based on this, test and diagnosis, design and ecological construction techniques were completed, throughout a model experiment and on site application. Domestic reservoirs not only contain dry steep slope but also section of gentle slope with wetland distribution. In this study, such gentle slope wetland were considered riparian wetland for organism and technology is eveloped to create fish habitat and pathway, and applied and evaluated in reservoirs, such as Gunwi and Soyang.
In Lake Soyang, fish conservation facilities, floating fish spawning platform (3 areas), artificial reefs (3 areas), near shore submerged reefs (2 areas) and riparian wetland habitat (2 areas) were developed for ecological restoration and fish spawning, species and population were investigated. Research result of 2010 to 2013 showed fishes of 12 families, 41 species and 93,120 individuals where smelt fish (80.57%) as minant and minnow (5.82%) as subdominant species, inahabited around the facilities. Each facilities under water recording showed species appeared around artificial reefs, floating spawning platform, near shore ubmerged reefs and riparian wetland habitat were 10, 11, 9 and 9, respectively.