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Çѱ¹¼öÀÚ¿øÇÐȸ / v.36, no.5, 2003³â, pp.799-810
GIUHÀû¿ëÀ» À§ÇÑ DEM °ÝÀÚÅ©±â ¹× Threshold AreaÀÇ ¹Î°¨µµºÐ¼®
( Sensitivity Analysis of GIUH Model Applied to DEM Resolutions and Threshold Areas )
Á¶È¿¼·;Á¤°ü¼ö;±èÀçÇÑ; ÀϽÅÇÏÀÌÅØ ±â¼ú¿¬±¸¼Ò;Ãæ³²´ëÇб³ Åä¸ñ°øÇаú;Ãæ³²´ëÇб³ Åä¸ñ°øÇаú;
 
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ÀϹÝÀûÀ¸·Î ¼ö¹®¸ðÇüÀº Á÷Á¢ ¶Ç´Â °£Á¢ÀûÀ¸·Î Á¤ÀǵǴ ÁöÇü¸Å°³º¯¼ö¿¡ ´ëÇÑ ÁöÇüÇÐÀû ÇØ¼®À» ÇÊ¿ä·Î ÇÑ´Ù. GIS´Â ÁöÇüÀÇ ¼öÄ¡ÀÚ·á·ÎºÎÅÍ ÀÌ·¯ÇÑ ¸Å°³º¯¼ö¸¦ ÃßÃâÇÏ¿© Á¦°øÇÒ ¼ö ÀÖ´Ù. µû¶ó¼­ º» ¿¬±¸´Â ¼öÄ¡ÁöÇüµµ»óÀÇ ½ÇÁ¦ ÇÏõ¸Á ¹× threshold area¸¦ ÃßÃâÇϰí, Á¤¹æÇà·ÄÀÇ °íµµ¼öÄ¡¸¦ Ç¥ÇöÇÏ´Â ¼öÄ¡°íµµ¸ðÇü(Digital Elevation Model :DEM)·ÎºÎÅÍ ÇÏõ¸ÁÀ» ÃßÃâ½Ã, ½ÇÁ¦ ÁöÇüµµ»ó¿¡¼­ ³ªÅ¸³ª´Â threshold areaÀÇ Åë°èÀû º¯È­¿¡ µû¸¥ º¯È­¸¦ °ËÅäÇÏ¿´´Ù. ¶ÇÇÑ ½ÇÁ¦ ¼öÄ¡ÁöÇüµµ¿¡¼­ ÃßÃâÇÑ À¯¿ªÀÇ ÁöÇü¸Å°³º¯¼ö¿Í DEMÀ¸·ÎºÎÅÍ ÃßÃâÇÑ ÁöÇü¸Å°³º¯¼ö¸¦ ÁöÇüÇÐÀû ¼ø°£´ÜÀ§µµ(Geomorphological Instantaneous Unit Hydrgraph : GIUH)¸ðÇüÀÇ ÀÔ·ÂÀÚ·á·Î Ȱ¿ëµÉ ¶§, DEMÀÇ °ÝÀÚ Å©±â¿Í ÇÏõ¸Á ÃßÃâ¿¡ ÇÊ¿äÇÑ threshold areaÀÇ º¯È­¿¡ ´ëÇÑ À¯¿ª Ư¼º °íÀ¯Ä¡ÀÇ ¹Î°¨µµ¸¦ ºÐ¼®ÇÑ °ÍÀÌ´Ù. º» ¿¬±¸ °á°ú DEMÀÇ °ÝÀÚÅ©±â¿Í threshold areaÀÇ º¯È­¿¡ µû¶ó GIUH ¸ðÇüÀº ¹Î°¨ÇÏ°Ô º¯È­Çϰí ÀÖÀ½À» ¾Ë ¼ö ÀÖ¾úÀ¸¸ç, º¸Ã»Ãµ »ê¼º±³ Àû¿ë ´ë»óÁö¿ªÀÇ °æ¿ì DEM°ÝÀÚÅ©±â´Â 25m¡­50mÀÇ Å©±â°¡ ÀûÁ¤Çϰí, ÇÏõ¸ÁÀ» ÃßÃâÇÒ ¶§ »ç¿ëµÇ´Â threshold area´Â ÃʰúÈ®·ü 30%¡­5o%Å©±â°¡ ÀûÁ¤ÇÔÀ» º¸¿©Áá´Ù.
Hydrologic models generally require land surface analysis to different topographic parameters defined as direct or indirect input variables to the model. Specially GIS supply the these parameters from digital data set of land surface The sensitivity analysis to DEM(Digital Elevation Model) resolution and the threshold area are of GIS extracted digital data set applied GIUH(Geomorphological Instantaneous Unit Hydrograph)model is investigated. Also it is compared the responses of GIUH model as input data of stream networks from digital data set(blue line) of NGIS and those extracted from DEM of various grid sizes. The results shows that the GIUH model is significantly affected by the DEM resolution and threshold area. According to the results, DEM grid size is suitable from 25m to 50m. Also threshold area is in the range of 30%¡­50% for exceedance probability.
 
Ű¿öµå
DEM°ÝÀÚÅ©±â;DEM resolution;Threshold area;GIS;GIUH;Sensitivity Analysis;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.36, no.5, 2003³â, pp.799-810
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200311922024553)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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