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Çѱ¹¼öÀÚ¿øÇÐȸ / v.39, no.2, 2006³â, pp.151-160
ÇѰ­À¯¿ª ÇѰ­À¯Ãâ·® »êÁ¤
( Estimation or Threshold Runoff on Han River Watershed )
±èÁøÈÆ;¹è´öÈ¿; ¼¼Á¾´ëÇб³ Åä¸ñȯ°æ°øÇаú;¼¼Á¾´ëÇб³ ¹°ÀÚ¿ø¿¬±¸¼Ò;
 
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º» ¿¬±¸¿¡¼­´Â µ¹¹ßÈ«¼ö ¿¹°æº¸½Ã½ºÅÛÀÇ ¼ö¹®ÇÐÀû ±¸¼º¿ä¼ÒÀÎ ÇѰèÀ¯Ãâ·®À» ManningÀÇ Á¦¹æ¿ù·ù À¯·®, ÁöÇü±âÈÄ ÇÐÀû ¼ø°£ÆÇÀ§µµ ±â¹ýÀ» Ȱ¿ëÇÏ¿© ÇѰ­À¯¿ªÀ» ´ë»óÀ¸·Î »êÁ¤ÇÏ¿´´Ù. ÇѰ­À¯¿ªÀÇ 3" DEMÀڷḦ ÀÌ¿ëÇÏ¿© ¹Ì¼¼¼ÒÀ¯ ¿ª ±¸ºÐ($1.02~56.41km^2$), Çϵµ ¹× Çϵµ°æ»ç¸¦ GIS·ÎºÎÅÍ ÃßÃâÇÔÀ¸·Î½á ÇѰèÀ¯Ãâ·® »êÁ¤À» À§ÇÑ À¯¿ª ¸Å°³º¯¼ö¸¦ ±¸ÃàÇÏ¿´´Ù. ¶ÇÇÑ À¯¿ª ¹× Çϵµ°£ÀÇ Áö¿ªÀû ȸ±ÍºÐ¼®À» À§ÇØ ½ÇÃø ¼ÒÇÏõ Çϵµ´Ü¸éÀڷḦ ¼öÁýÇÏ¿© Åë°èÇÐÀûÀ¸·Î ÃÖÀûÀÇ È¸±Í½ÄÀ» ÃßÁ¤Çϰí, À̸¦ ÅëÇØ ÇѰèÀ¯Ãâ·® °è»êÀÇ Çϵµ ÀÔ·ÂÀڷḦ »ý¼ºÇÏ¿´´Ù. ÀÌ·¯ÇÑ À¯¿ª ¹× Çϵµ ¸Å°³º¯¼ö¸¦ ÅëÇØ ÇѰ­ headwater À¯¿ª¿¡¼­ »êÁ¤µÈ ÇѰèÀ¯Ãâ·®Àº $2mm/h~14mm/6hr$ÀÇ ¹üÀ§¸¦ º¸À̸ç, Áö¼Ó½Ã°£ 1½Ã°£ÀÎ °æ¿ì $97%$°¡ 8mº¸´Ù ÀÛÀº °ªÀ̰í 6½Ã°£ÀÎ °æ¿ì $98%$°¡ 14mmº¸´Ù ÀÛÀº °ªÀ¸·Î »êÁ¤µÇ¾ú´Ù. °è»êµÈ ÇѰèÀ¯Ãâ·®°ú À¯¿ª ¹× Çϵµ ¸Å°³º¯¼ö»çÀÌÀÇ ¹Î°¨µµ´Â À¯¿ª¸éÀû°ú °°Àº À¯¿ªÀÇ ÁöÇüÀÎÀÚº¸´Ù´Â Çϵµ°æ»ç, ÇÏÆø, ¸¶Âû°æ»ç¿Í °°Àº Çϵµ ÁöÇüÀÎÀÚ¿¡ ºñ±³Àû Å« º¯µ¿¼ºÀ» º¸ÀÌ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. ÀÌ·¯ÇÑ ÇѰ­À¯¿ª ÇѰèÀ¯Ãâ·®À» ±¹¿ÜÀÇ Å¸ ¿¬±¸»ç·Ê¿Í ºñ±³ ÇÑ °á°ú ±× °è»ê°á°ú°¡ ÀûÀýÇÑ °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù.
In this study, threshold runoff which is a hydrologic component of flash flood guidance(FFG) is estimated by using Manning's bankfull flow and Geomorphoclimatic Instantaneous Unit Hydrograph(GcIUH) methods on Han River watershed. Geographic Information System(GIS) and 3' Digital Elevation Model database have been used to prepare the basin parameters of a very fine drainage area($1.02~56.41km^2$), stream length and stream slope for threshold runoff computation. Also, cross-sectional data of basin and stream channel are collected for a statistical analysis of regional regression relationships and then those are used to estimate the stream parameters. The estimated threshold runoff values are ranged from 2 mm/h to 14 mm/6hr on Han River headwater basin with the 1-hour duration values are$97%$ up to 8mm and the 6-hour values are $98%$ up to 14mm. The sensitivity analysis shows that threshold runoff is more variative to the stream channel cross-sectional factors such as a stream slope, top width and friction slope than the drainage area. In comparisons between the computed threshold runoffs on this study area and the three other regions in the United States, the computed results on Han River watershed are reasonable.
 
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ÇѰèÀ¯Ãâ·®;µ¹¹ßÈ«¼ö ¿¹°æº¸½Ã½ºÅÛ;Á¦¹æ¿ù·ù À¯·®;ÁöÇü±âÈÄÇÐÀû ¼ø°£´ÜÀ§µµ;threshlod runoff;FFG, bankfull flow;GcIUH;GIS;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.39, no.2, 2006³â, pp.151-160
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200614222989899)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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