2003 Volume 2 Pages 25-48
Goal programming is one of the most effective means for making watershed management plan considering various forest functions. It cannot, however, deal such functions that do not have enough quantitative information because formulation regarding such functions is difficult. We showed how to deal such functions using landscape concept with GIS to make watershed management plan. We clarified the landscape level at which such functions conflict with others and omitted the corresponding area from whole watershed management area, then we used goal programming. When it was difficult to specify the corresponding area, we showed two other ways. One was omitting the area of the upper landscape level that contain the area having probability to conflict and can be specified from whole watershed management area before using goal programming. Another was allocating cutting area using goal programming at first and overlaying the area of the upper landscape level. This makes the area of the landscape elements where conflicts may occur smaller, and we can investigate the whole area to detect where conflicts may occur in it. We applied these procedures to the River Iwaobetu in Shiretoko peninsula and made two watershed management plans.