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Çѱ¹¼öÀÚ¿øÇÐȸ / v.32, no.4, 1999³â, pp.489-499
°³¼±µÈ ÁöÇüÁö¼ö »êÁ¤ ¾Ë°í¸®ÁòÀÇ Àû¿ë¿¡ °üÇÑ ¿¬±¸
( Application of Improved Algorithm for Topographic Index Calculation )
±è»óÇö;ÀÌÁö¿µ; ºÎ»ê´ëÇб³ ȯ°æ°øÇаú;ºÎ»ê´ëÇб³ ȯ°æ°øÇаú;
 
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º» ¿¬±¸´Â ºÐÆ÷Çü ¼ö¹® ¸ðÇüÀÎ TOPMODELÀÇ ±âº» ÀÔ·ÂÀÚ·áÀÎ ÁöÇüÁö¼ö, 1n(a/tan {{{{{B}_{}}}}}) »êÁ¤À» À§ÇÑ ¾Ë°í¸®Áò°ú ¼ö·ÎÇü¼º¸éÀû(CIT)°ú ±¸¹è¸è±Þ¼ö(H)¸¦ °í·ÁÇÑ °³¼±µÈ ÁöÇüÁö¼ö »êÁ¤ ¾Ë°í¸®ÁòÀÇ ±¹³» ÁöÇü¿¡ ´ëÇÑ Àû¿ë¼ºÀ» °ËÅäÇÏ¿´´Ù. ´ë»ó À¯¿ªÀº ûµµÃµ À¯¿ªÀÇ ÇÑÁ¦Ãµ ¼ÒÀ¯¿ª (18.6km2)°ú À§Ãµ ´ëÇ¥ ½ÃÇèÀ¯¿ªÀÇ µ¿°î ¼ÒÀ¯¿ª(33.6km2)À¸·Î, ÀÌ µÎ À¯¿ª¿¡ ´ëÇÑ 10m, 20m, 30m, 50m, 100mÀÇ ¼öÄ¡°íµµÀÚ·á(Digital elevation model ; DEM)À» ±¸ÃàÇÏ¿´´Ù. ±âÁ¸ ¾Ë°í¸®Áò¿¡ ´ëÇØ ¼ö·ÎÇü¼º¸éÀûÀÇ Àû¿ë °á°ú, ¼ö·Î °ÝÀÚ¿¡ ´ëÇÑ ÁöÇüÁö¼öÀÇ ÀûÀýÇÑ Ã³¸®¸¦ ÅëÇØ °³¼±µÈ °è»ê °á°ú¸¦ ¾òÀ» ¼ö ÀÖ¾ú°í, ±¸¹è¸è±Þ¼ö(H)ÀÇ Àû¿ëÀ» ÅëÇØ ±âÁ¸ÀÇ ´Ù¹æÇâ È帧(MFD) ¾Ë°í¸®Áò¿¡ ºñÇØ À¯¿ª ³» Çù°î ÁöÁ¡¿¡ ´ëÇÑ È帧ÀÇ ¼ö·Å È¿°ú¸¦ ¾òÀ» ¼ö ÀÖ¾ú´Ù. °³¼±µÈ ¾Ë°í¸®Áò¿¡ ÀÇÇØ °è»êµÈ ÁöÇüÁö¼ö ºÐÆ÷´Â ÃÖ´ë°ªÀÇ °¨¼Ò·Î À¯Ãâ ¸ðÀǽà °úµµÇÑ Ãʱâ À¯Ãâ °è»ê ¹®Á¦¸¦ ¿ÏÈ­½Ãų ¼ö ÀÖ¾ú´Ù. ±âÁ¸ ¾Ë°í¸®ÁòÀ» »ç¿ëÇÑ À¯Ãâ ¸ðÀÇ¿Í ºñ±³ÇÏ¿© °³¼±µÈ ¾Ë°í¸®ÁòÀ» Ȱ¿ëÇÑ ÀüüÀûÀÎ ¸ðÀÇ È¿À²Àº À¯»çÇϳª ¼ö¹®Á¤º¸ÀÇ °ø°£ ºÐÆ÷ »êÁ¤Àº º¸´Ù ÇÕ¸®ÀûÀÎ °á°ú¸¦ µµÃâÇÏ¿´´Ù,
This research investigated the applicapability of an improved algorithm to calculate the topographic index, ln($alpha$/tan B), for the topography of Korea employing channel initiation threshold area(CIT) and an exponent for the gradient(H). hanjaechun subwatershed in Cheongdochun and Dongok subwatershed in Wichun test watershed were selected as study areas. The digital elevation models(DEM) of study areas have been made with the resolution from 10m to 100m. Application of CIT to the traditional algorithm provide reasonable computation method in considering channel pixel impact. Introduction of the gradient exponent(H) made it possible to obtain better flow convergence effect in concave topography comparing with the traditional multiple flow direction algorithm. The improved algorithm shows the capability to relax the overestimation problem of rising limb of hydrograph through reducing overestimated high value of topographic index.
 
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ÁöÇüÁö¼ö;¼öÄ¡°íµµÀÚ·á;¼ö·ÎÇü¼º¸éÀû;±¸¹è¸è±Þ¼ö;TOPMODEL;topographic index;digital elevation model(DEM);CIT;exponent for the gradient;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.32, no.4, 1999³â, pp.489-499
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911920063242)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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ȸ»ç¼Ò°³ ±¤°í¾È³» ÀÌ¿ë¾à°ü °³ÀÎÁ¤º¸Ãë±Þ¹æÄ§ Ã¥ÀÓÀÇ ÇѰè¿Í ¹ýÀû°íÁö À̸ÞÀÏÁÖ¼Ò ¹«´Ü¼öÁý °ÅºÎ °í°´¼¾ÅÍ
   

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