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Çѱ¹¼öÀÚ¿øÇÐȸ / v.41, no.9, 2008³â, pp.895-905
À¯ÇÑüÀû¹ýÀ» ÀÌ¿ëÇÑ °ÝÀÚ±â¹ÝÀÇ ºÐÆ÷Çü °­¿ì-À¯Ãâ ¸ðÇü °³¹ß
( Development of Grid Based Distributed Rainfall-Runoff Model with Finite Volume Method )
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À¯¿ªÀÇ ¼ö¹®Çö»óÀ» ÇØ¼®Çϱâ À§Çؼ­´Â ´Ù¾çÇÑ ÁöÇüÀÚ·á¿Í ¼ö¹® ½Ã°è¿­ÀÚ·á°¡ ÇÊ¿äÇÏ´Ù. ÃÖ±Ù µé¾î DEM(Digital Elevation Model)°ú ¼öÀÚ¿ø ÁÖÁ¦µµ¿Í °°Àº ÁöÇüÀÚ·á »Ó¸¸ ¾Æ´Ï¶ó ¼öÄ¡¿¹º¸ÀÚ·á ¹× °­¿ì·¹ÀÌ´õÀÇ °üÃøÀÚ·á¿Í °°Àº ¼ö¹® ½Ã°è¿­ÀÚ·á ¶ÇÇÑ °ÝÀÚ ÇüÅ·ΠÁ¦°øµÇ°í ÀÖÀ¸¸ç, À̸¦ Ȱ¿ëÇÑ ¼ö¹®ºÐ¼®¿¡ ´ëÇÑ ´Ù¾çÇÑ ¿¬±¸°¡ ÀÌ·ç¾îÁö°í ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â ÀÌ·¯ÇÑ °ÝÀÚÇü ÀڷḦ ÀÌ¿ëÇÏ¿© È¿°úÀûÀ¸·Î ´Ü±â°£ÀÇ °­¿ì-À¯Ãâ Çö»óÀ» ¸ðÀÇÇϱâ À§ÇÑ ¹°¸®Àû ±â¹ÝÀÇ ºÐÆ÷Çü °­¿ì-À¯Ãâ ¸ðÇüÀÎ GRM(Grid based Rainfall-runoff Model)À» °³¹ßÇÏ¿´´Ù. ÁöÇ¥¸é À¯Ãâ°ú Çϵµ À¯ÃâÀÇ ¸ðÀÇ´Â ¿îµ¿ÆÄ ¹æÁ¤½ÄÀ» ÀÌ¿ëÇϰí ÀÖÀ¸¸ç, ħÅõ·® »êÁ¤À» À§Çؼ­ Green-Ampt ¸ðÇüÀ» ÀÌ¿ëÇϰí ÀÖ´Ù. Áö¹è¹æÁ¤½ÄÀº À¯ÇÑ Ã¼Àû¹ýÀ» ÀÌ¿ëÇÏ¿© ÀÌ»êÈ­ ÇÏ¿´À¸¸ç, TDMA(TriDiagonal Matrix Algorithm) ¹æ¹ýÀ» ÀÌ¿ëÇÏ¿© ¿¬¸³¹æÁ¤½ÄÀ» Ç®°í, ºñ¼±Çü Ç׿¡ ´ëÇØ¼­´Â Newton-Raphson ¹æ¹ýÀ¸·Î ¹Ýº¹ °è»êÇÔÀ¸·Î½á ¼ö·ÅÇØ¸¦ µµÃâÇÏ¿´´Ù. °³¹ßµÈ ¸ðÇüÀº ´Ü¼øÈ­µÈ °¡»óÀÇ À¯¿ª¿¡ ´ëÇØ¼­ Àû¿ëÇÑ °á°ú¸¦ $Vflo^{TM}$ ¸ðÇüÀÇ ¸ðÀǰá°ú¿Í ºñ±³ÇÔÀ¸·Î½á Ÿ´ç¼ºÀ» °ËÅäÇÏ¿´´Ù. ¶ÇÇÑ À§Ãµ À¯¿ªÀÇ Àû¿ëÀ» ÅëÇØ ¸ðÇüÀÇ °ËÁõ ¹× ½ÇÁ¦ À¯¿ª¿¡ ´ëÇÑ Àû¿ë¼ºÀ» °ËÅäÇÏ¿´À¸¸ç, ¸ðÀǰá°ú´Â °üÃøÀ¯·®ÀÇ ÀçÇö¼ºÀÌ ³ôÀº °ÍÀ¸·Î ³ªÅ¸³µ´Ù.
To analyze hydrologic processes in a watershed requires both various geographical data and hydrological time series data. Recently, not only geographical data such as DEM(Digital Elevation Model) and hydrologic thematic map but also hydrological time series from numerical weather prediction and rainfall radar have been provided as grid data, and there are studies on hydrologic analysis using these grid data. In this study, GRM(Grid based Rainfall-runoff Model) which is physically-based distributed rainfall-runoff model has been developed to simulate short term rainfall-runoff process effectively using these grid data. Kinematic wave equation is used to simulate overland flow and channel flow, and Green-Ampt model is used to simulate infiltration process. Governing equation is discretized by finite volume method. TDMA(TriDiagonal Matrix Algorithm) is applied to solve systems of linear equations, and Newton-Raphson iteration method is applied to solve non-linear term. Developed model was applied to simplified hypothetical watersheds to examine model reasonability with the results from $Vflo^{TM}$. It was applied to Wicheon watershed for verification, and the applicability to real site was examined, and simulation results showed good agreement with measured hydrographs.
 
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ºÐÆ÷Çü ¸ðÇü;°­¿ì-À¯Ãâ;À¯ÇÑüÀû¹ý;¿îµ¿ÆÄ ¹æÁ¤½Ä;distributed model;rainfall-runoff;finite volume method;kinematic wave equation;GRM;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.41, no.9, 2008³â, pp.895-905
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200828955287932)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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