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Çѱ¹Áö¹Ý°øÇÐȸ / v.23, no.11, 2007³â, pp.99-107
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¾ÐÃ༺ÀÌ Å« Áö¹Ý¿¡¼ ¼ø°£º¯À§(Ãæ°Ý)½ÃÇè ÇØ¼®À» À§ÇÑ ¼±Çü Ä¿ºêÇÇÆÃ¹ý(Linear Curve Fitting Methods)ÀÇ Àû¿ë
( Application of Linear Curve Fitting Methods for Slug Test Analysis in Compressible Aquifer ) |
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| Hvorslev¹ýÀ̳ª Bouwer and Rice¹ý°ú °°Àº ¼±Çü Ä¿ºêÇÇÆÃ¹ýÀº ´ë¼öÃþÀÇ ÇöÀå Åõ¼ö°è¼ö¸¦ ±¸Çϱâ À§ÇØ ½Ç½ÃÇÏ´Â ¼ø°£º¯À§½ÃÇè ȤÀº ¼ø°£Ãæ°Ý½ÃÇè(slug test) °á°ú¸¦ È¿°úÀûÀÌ°í °£ÆíÇÏ°Ô ÇØ¼®Çϵµ·Ï ÇÑ´Ù. ±×·¯³ª, ´ë¼öÃþÀÇ ¾ÐÃ༺ÀÌ Å¬ °æ¿ì, ¼ø°£º¯À§½ÃÇèÀÇ °á°ú°¡ ¹Ý´ë¼ö ±×·¡ÇÁ¿¡¼ ¼±ÇüÀûÀÌÁö ¾Ê°í »óÇâÀ¸·Î ¿À¸ñÇÑ °î¼± ÇüŸ¦ °®°Ô µÇ¹Ç·Î, ´ë¼öÃþÀÇ ¾ÐÃ༺À» ¹«½ÃÇÏ´Â ±âÁ¸ÀÇ ¼±Çü Ä¿ºêÇÇÆÃ¹ýÀº ÀÌ·± °æ¿ì¿¡ ±×´ë·Î Àû¿ëÇÏ±â ¾î·Æ´Ù. º» ³í¹®¿¡¼´Â µÎ ¼±Çü Ä¿ºêÇÇÆÃ¹ýÀ» ºÎºÐ °üÅëµÈ ¿ì¹°ÀÇ °æ¿ì¿¡ ´ëÇÏ¿© ºñ±³ ºÐ¼®ÇÏ¿© ´ëºÎºÐÀÇ °æ¿ì¿¡ Hvorslev¹ýÀÌ Bouwer and Rice¹ý¿¡ ºñÇÏ¿© °ú´ÙÇÏ°Ô ÇöÀå Åõ¼ö°è¼ö¸¦ »êÁ¤ÇÔÀ» º¸¿´´Ù. ¶ÇÇÑ, °¢±â ´Ù¸¥ Ä¿ºêÇÇÆÃ ¹æ¹ý¿¡ µû¸¥ ¼ø°£º¯À§½ÃÇè ÇØ¼®°á°ú¸¦ ¹«Â÷¿ø ¾ÐÃà ¸Å°Ôº¯¼ö(${alpha}$)ÀÇ ¹üÀ§ 0.001¿¡¼ 1±îÁö¿¡ ´ëÇÏ¿© ºñ±³ ºÐ¼®ÇÏ¿´´Ù. ¸¶Áö¸·À¸·Î, ¾ÐÃ༺ÀÌ Å« ´ë¼öÃþÀÇ ¼ø°£ º¯À§½ÃÇè ÇØ¼®À» À§ÇÏ¿© ChirlinÀÇ ¹æ¹ýÀ» ºÎºÐ °üÅëµÈ ¿ì¹°ÀÇ Çü»óÀ» °í·ÁÇÒ ¼ö ÀÖµµ·Ï È®ÀåÇÏ¿© ¼öÁ¤µÈ ¼±Çü Ä¿ºêÇÇÆÃ¹ýÀ» Á¦½ÃÇÏ¿´´Ù. Á¦¾ÈµÈ ¹æ¹ýÀÇ ÇöÀå Àû¿ë¼ºÀ» °ËÅäÇϱâ À§ÇØ ºùÀûÅä ´ë¼öÃþ¿¡¼ ½Ç½ÃµÈ ¼ø°£ º¯À§½ÃÇè °á°ú¸¦ ÀÌ¿ëÇÏ¿© »ç·ÊºÐ¼®À» ÇÏ¿´´Ù. |
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| The linear curve fitting methods such as the Hvorslev method and the Bouwer and Rice method provide a rapid and simple means to analyze slug test data for estimating in-situ hydraulic conductivity (k) of geologic material. However, when analyzing a slug test in a relatively compressible aquifer, these methods have difficulties in fitting a straight line to the semi-logarithmic plot of the test data that shows a concave-upward curvature because the linear curve fitting methods ignore the role of the compressibility or specific storage ($S_s$) of an aquifer. The comparison of the Hvorslev method and the Bouwer and Rice method is made far a partially-penetrating well geometry to show analytically that the Hvorslev method estimates higher hydraulic conductivity than the Bouwer and Rice method except that the well intake section locates very close to the bottom of the aquifer. The effect of fitting a straight line to the slug test data is evaluated along with the dimensionless compressibility parameter (${alpha}$) ranging from 0.001 to 1. A modified linear curve fitting method that is expanded from Chirlin's approach to the case of a partially penetrating well with the basic-time-lag fitting method is introduced. A case study for a compressible glacial till is made to verify the proposed method by comparing with a type curve method (KGS method). |
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| Bouwer and Rice method;Compressible aquifer;Hvorsleve method;Linear curve fitting;Slug test; |
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Çѱ¹Áö¹Ý°øÇÐȸ³í¹®Áý / v.23, no.11, 2007³â, pp.99-107
Çѱ¹Áö¹Ý°øÇÐȸ
ISSN : 1229-2427
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200706414119308)
¾ð¾î : Çѱ¹¾î |
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| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
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