数值地形模型应用于集水区规划与整治之研究.PDF

6 3 Vol.6 No. 3 1999 9 Research of Soil and Water Conservation Sep. , 1999 1 2 1 林昭远　林文赐　张力仁 ( 1 , ; 2 ) ,, , ; 1 , Applicati on of Digital Terrain Model f or Watershed Pl anning and Management 1 2 1 Chao Yuan L in Wen Si L in L it Chang ( 1 , ) Dep artment of Soil and Water Conserv ation Chung H sing University Taichung Taiw an 2 ( GIS esearch Center,Feng Chia University TaichungTaiwan) AbstractTopographic and hydrologic features of a watershed are the essential information for conservation planning in the watershed. T he purpose of this study was to develop a system for extracting the information of interest watershed. Area, perimeter, rivers, length, mean width, form factor river density average elevation average slope compactness time of overland, , , , , flow time of channel flow time of concentration rainfall intensity and peak flow of analyzed, , , watershed can be derived immediately from the system. A dynamic watershed query module was also developed in the system to show the boundary and attributes of any watershed located in the interest area. T he module of debris can calculate the information of coordination, stream order slope stream length average stream slope numbers of stream order, , , , 1, stream tortuosi ty,watershed area and watershed perimeter of the outlets located at the intersection of road and a : 1999 06 01 38 6 stream. The debris module provides useful i