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Çѱ¹¼öÀÚ¿øÇÐȸ / v.29, no.5, 1996³â, pp.215-222
ºñÁ¤Ã¼Çü 2Â÷¿ø ´Ù°ø¼º ¸ÅÁúÀÇ ´ë¼öÅõ¼ö°è¼ö-¼öµÎ ±³Â÷°øºÐ»ê¿¡ °üÇÑ ¿¬±¸
( A Study on Logconductivity-Head Cross Covariance in Two-Dimensional Nonstationary Porous Formations )
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º» ³í¹®¿¡¼­´Â ´Ù°ø¼º ¸ÅÁúÀÇ Æ¯¼öÀ²ÀÌ ºñÁ¤Ã¼ÇüÀÎ °æ¿ì ´ë¼öÅõ¼ö°è¼ö-¼öµÎ ±³Â÷°øºÐ»ê¿¡ °üÇÑ ½ÄÀ» À¯µµÇÏ¿´À¸¸ç, ÀÌ ±³Â÷°øºÐ»êÀº ¼öµÎºÐÆ÷·ÎºÎÅÍ Æ¯¼öÀåÀÇ Åë°èÇÐÀû Ư¼ºÀ» À¯ÃßÇϴµ¥(inverse problem) ¸Å¿ì Áß¿äÇÑ ¿ªÇÒÀ» ´ã´çÇÑ´Ù. ºñÁ¤Ã¼Çü ´ë¼öÅõ¼ö°è¼ö´Â ÀÏÁ¤ÇÑ ¼±Çü°æÇâ°ú Á¤Ã¼ÇüÀÎ ¹Ì¼Ò º¯µ¿ÀÇ ÇÕÀ¸·Î ±¸¼ºµÇ¾úÀ¸¸ç, 2Â÷¿ø Æ÷È­´ë¼öÃþ¿¡¼­ Á¤»ó À¯µ¿¹®Á¦¸¦ Ãß°èÇÐÀûÀ¸·Î ÇØ¼®ÇÏ¿© ¼öµÎºÐÆ÷¸¦ ¾ò¾ú°í À̷κÎÅÍ ±³Â÷°øºÐ»êÀ» À¯µµÇÏ¿´´Ù. Åõ¼ö°è¼öÀÇ »ó°üÇÔ¼ö°¡ °¡¿ì½ººÐÆ÷¸¦ °¡Áö°í ±× °æÇâÀÌ ¼öµÎ °æ»ç¿Í ÆòÇàÀ̰ųª Á÷±³ÇÏ´Â µÎ °¡Áö °æ¿ì¿¡ ´ëÇÏ¿© ±³Â÷°øºÐ»êÀ» »ìÆì º» °á°ú, Åõ¼öÀåÀÇ °æÇâÀÌ ÁÖ È帧¹æÇâ°ú ÆòÇàÇÑ °æ¿ì È帧¹æÇâ Âʸ¸ Á¦¿ÜÇϰí´Â Á¤Ã¼ÇüÀÓÀÌ ¹àÇôÁ³´Ù. ¶ÇÇÑ, È帧¹æÇâ°ú Á÷±³ÇÏ´Â ÂÊÀ¸·ÎÀÇ ±³Â÷°øºÐ»êÀº Á¤Ã¼Çü ¸ðµ¨ °á°ú¿Í ´Þ¸® ¿µÀÌ ¾Æ´Ô¸¦ ¾Ë ¼ö ÀÖ¾ú´Ù. µû¶ó¼­ ÁöÇϼö À¯µ¿À̳ª ¿À¿°¹°Áú È®»ê¹®Á¦¸¦ ´Ù·ê °æ¿ì, Åõ¼ö°è¼öÀå¿¡ ¾î¶² °æÇâÀÌ Á¸ÀçÇÑ´Ù°í ÀÇ½ÉµÉ ¶§¿¡´Â ¹Ýµå½Ã ±× °æÇâÀ» ÇØ¼®°úÁ¤¿¡ Æ÷ÇÔ½ÃÄÑ¾ß ÇÑ´Ù.
An expression for the cross covariance of the logconductivity and the head in nonstationary porous formation is obtained. This cross covariance plays a key role in the inverse problem, i.e., in inferring the statistical characteristics of the conductivity field from head data. The nonstationary logconductivity is modeled as superposition of definite linear trend and stationary fluctuation and the hydraulic head in saturated aquifers is found through stochastic analysis of a steady, two-dimensional flow. The cross covariance with a Gaussian correlation function is investigated for two particular cases where the trend is either parallel or normal to the head gradient. The results show that cross covariances are stationary except along separation distances parallel to the mean flow direction for the case where the trend is parallel to head gradient. Also, unlike the stationary model, the cross covariance along distances normal to flow direction is non-zero. From these observations we conclude that when a trend in the conductivity field is suspected, this information must be incorporated in the analysis of groundwater flow and solute transjport.
 
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Çѱ¹¼öÀÚ¿øÇÐȸÁö / v.29, no.5, 1996³â, pp.215-222
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1738-9488
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199611920097864)
¾ð¾î : ¿µ¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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