コンピュータを用いた水文地形解析序論

Abstract

This paper describes automatic data processing systems for analysis of geomor-phologic features of drainage basins and channel networks. The conventional analy-sis, which required time-consuming manual work based on only topographical maps, has become possible to be reformed because of recent remarkable progress of com-puters and tractable arrangement of geographical data. The authors develop fivesystems using computers (personal or general purpose ones) and the Digital Nation-al Land Information released by the Geological Surveying Institute, the Ministry ofConstruction and discuss the merits and demerits of them. The results of the chan-nel network analysis based on the Horton-Strahler stream number are also dis-cussed.