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													| Çѱ¹¼öÀÚ¿øÇÐȸ / v.31, no.4, 1998³â, pp.363-373   |  
													| ºñÁ¤Ã¼Çü ÁöÇÏ´ë¼öÃþÀÇ ¼Óµµ-´ë¼öÅõ¼ö°è¼ö, ¼Óµµ-¼öµÎ ±³Â÷°øºÐ»ê¿¡ °üÇÑ ¿¬±¸ ( A Study on Velocity-Log Conductivity, Velocity-Head Cross Covariances in Aquifers with Nonstationary Conductivity Fields )
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													| In this study, random flow field in a nonstationary porous formation is characterized through cross covariances of the velocity with the log conductivity and the head. The hydraulic head and the velocity in saturated aquifers are found through stochastic analysis of a steady, two-dimensional flow field without recharge. Expression for these cross covariances are obtained in quasi-analytic forms all in terms of the parameters which characterize the nonstationary conductivity field and the average head gradient. The cross covariances with a Gaussian correlation function for the log conductivity are presented for two particular cases where the trend is either parallel or perpendicular to the mean head gradient and for separation distances along and across the mean flow direction. The results may be of particular importance in transport predictions and conditioning on field measurements when the log conductivity field is suspected to be nonstationary and also serve as a benchmark for testing nonstationary numerical codes. Keywords : cross covariance, nonstationary conductivity field, saturated aquifer, stochastic analysis. |  
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													| ±³Â÷°øºÐ»ê;ºñÁ¤Ã¼Çü Åõ¼öÀå;Æ÷È´ë¼öÃþ;Ãß°èÇÐÀû ÇØ¼®;cross covariance;nonstationary conductivity field;saturated aquifer;stochastic analysis; |  
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													| Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.31, no.4, 1998³â, pp.363-373 Çѱ¹¼öÀÚ¿øÇÐȸ
 ISSN : 1226-6280
 UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811920101056)
 ¾ð¾î : ¿µ¾î
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													| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |  
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