Various strategies and management plans have been established in order to conserve water quality as well as
ecosystem, prevent deterioration of scenic area, and more importantly, retain drinking water securely. However, due
to the introduction of numerous small-scale development projects on the waterside area outside protection area of
source water and reparian area, river water quality and landscape are severely deteriorated. In this study, We analyzed
the expected environmental impacts on the ecosystem, topograph, geology, landscape, water quality according to
development type, and assigned different environmental points to each development type depend on environmental
impacts, which is able to divide small-scale development project into three categories such as projects with rigorous
review, projects with general review and projects with simple review. Finally, we suggested the appraisal basement is
to avoid or minimize the expected environment impacts of the small-scale development projects in riparian areas so
that make them sustainable development by reasonable restriction.