中国地形起伏度的提取及在水土流失定量评价中的应用-水土保持通报.PDF

21 1 V o l. 21 N o. 1 2001 2 Bulletin of Soil and Wa ter Co nserva tion Feb. , 200 1 　 1 1 2 刘新华 , 杨勤科 , 汤国安 ( 1. , 712 100; 2. , 710069 　: 1 100( , / , DEM A RC IN FO G RID ,, 5 × 5 ; 5 km km km × 5 km ,,; ,。 : ; ; ; ; : 　　　　　: 1000— 288 ( 2001 0 1— 0057— 0 3　　　　　: 2 83. 7 B X P Extraction and Application of Relief of China Based on DEM and GISMethod 1 1 2 - , - , - LIU Xin hua Y AN G Qin ke T AN G Guo an ( 1. , , Institute of Soil and Water Conservation Chinese Academy of Sciences and Ministry of Water Resources 712 100, , ; 2. , Yangling District Shaanx i Province PRC Dep artment of Ur an and Resources Sciences N orthwest University , X ian 710069, Shaanx i Province, PRC : - , , 5 × 5 , Abstract Based on micro scale DEM dat um optimum size of analy sis window s of reli ef which is km km is defined by means of window s analysis