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Çѱ¹¼öÀÚ¿øÇÐȸ / v.31, no.2, 1998³â, pp.145-153
Washita '92 Åä¾ç¼öºÐ ÀÚ·áÀÇ 1Â÷¿ø ¹× 2Â÷¿ø Åë°èƯ¼º
( First-and Second-Order Statistics of Washita'92 Soil Moisture Data )
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ÀÌ ³í¹®¿¡¼­´Â Washita '92 ÀڷḦ ÀÌ¿ëÇÏ¿© Åä¾ç¼öºÐÀÇ 1Â÷¿ø ¹× 2Â÷¿ø Åë°èƯ¼ºÀ» ÃßÃâÇÏ¿´´Ù. ¾Æ¿ï·¯, Åä¾ç¼öºÐ°ú Åä¾ç, ¹à±â¿Âµµ(brightness temperature), ½Ä»ýÁö¼ö »çÀÌÀÇ »ó°ü°ü°è°¡ ¾î¶²Áö¸¦ ¼±Çüȸ±ÍºÐ¼®¿¡ ±Ù°ÅÇÏ¿© Á¶»çÇØ º¸¾ÒÀ¸¸ç °á°ú·Î¼­ Åä¾ç¼öºÐÀº ¹à±â¿Âµµ¿Í À¯ÀÇÇÒ¸¸ÇÑ »ó°ü¼ºÀÌ ÀÖ´Â °ÍÀ¸·Î ³ªÅ¸³µ´Ù. Åä¾ç¼öºÐÀÇ ½Ã°£¿¡ ´ëÇÑ °¨¼è(decay)°è¼ö¸¦ °¢°¢ÀÇ Åä¾ç±ºº°·Î ÃßÁ¤ÇÏ¿´°í, ¿ªÀ¸·Î ÀÌ °ªÀ» ÀÌ¿ëÇÏ¿© °üÃøÀü ¸¶Áö¸· °­¿ìÀÇ ½ÃÁ¡À» ÃßÁ¤ÇØ º» °á°ú °üÃø±â·Ï°ú À¯»çÇÑ 20ÀÏ Á¤µµ·Î ³ªÅ¸³µ´Ù. Åä¾ç¼öºÐÀÇ 2Â÷¿ø Åë°èƯ¼º ºÐ¼®Àº 2Â÷¿ø »ó°üµµ¿Í ½ºÆäÆ®·³À» µµÃâÇÏ°í ºÐ¼®ÇÔÀ¸·Î¼­ ¼öÇàÇÏ¿´À¸¸ç Åä¾ç°ú ½Ä»ýÁö¼ö¿¡ ´ëÇÑ 2Â÷¿ø ºÐ¼®°á°ú¿Í ºñ±³ÇÏ¿´´Ù. ÀÌ·¯ÇÑ ºÐ¼® °á°ú·Î Åä¾ç¼öºÐÀº °ø°£ÀûÀ¸·Î ¸Å¿ì ³ôÀº »ó°ü¼ºÀ» °®´Â Åä¾ç°ú »ó´ëÀûÀ¸·Î ³·Àº »ç¿À°£¼ºÀ» º¸ÀÌ´Â ½Ä»ýÀÇ Áß°£ÀûÀÎ 2Â÷¿ø Åë°èƯ¼ºÀ» ³ªÅ¸³¿À» ¾Ë ¼ö ÀÖ¾ú´Ù. Áï, ÁöÇüÀÌ ¿Ï¸¸ÇÏ¿© ÁöÇüÀûÀÎ ¿µÇâÀÌ »ó´ëÀûÀ¸·Î Àû´Ù°í ¾Ë·ÁÁø Washita Áö¿ªÀÇ °æ¿ì °ø°£ÀûÀ¸·Î ³ôÀº »ó°ü¼ºÀ» º¸ÀÌ´Â Åä¾çÀÇ °ø±Ø¿¡ Á¸ÀçÇÏ´Â Åä¾ç¼öºÐÀº »ó´ëÀûÀ¸·Î ³·Àº »ó°ü¼ºÀ» º¸ÀÌ´Â ½Ä»ý¿¡ ÀÇÇØ ±³¶õµÇ°í ÀÖÀ½À» ÆÄ¾ÇÇÒ ¼ö ÀÖ¾ú´Ù. ¼±ÇüÀú¼öÁöÀÇ °³³ä°ú °ø°£ÀûÀÎ È®»êÀ» °í·ÁÇÑ µ¿¿ªÇÐÀû Åä¾ç¼öºÐ ¸ðÇüÀÇ À¯µµ°úÁ¤À» º¸¿´°í ¸ðÇüÀÇ ¸Å°³º¯¼ö°¡ Åä¾ç¼öºÐÀÇ 1Â÷¿ø ¹× 2Â÷¿ø Åë°èƯ¼ºÀ¸·ÎºÎÅÍ È¿°úÀûÀ¸·Î ÃßÁ¤µÉ ¼ö ÀÖÀ½À» º¸¿´´Ù. Çٽɿë¾î : Åä¾ç¼öºÐ, Åä¾ç¼öºÐ¸ðÇü, »ó°üµµ, ½ºÆäÆ®·³
In this paper the first- and second order statistics of soil moisture are derived using the Washita '92 data. Also the possible correlations among the soil texture, the brightness temperature, the NDVI and the soil moisture are investigated based in the linear regression study. Only the correlation between the soil moisture and the brightness temperature shows significant values. The soil moisture decay coefficients in time were estimated for each soil type and cross-checked by calculating the last rainfall time before the observation to be about 20days in all different soil types. The second-order statistics of soil moisture based on the correlogram and the spectrum was analyzed to derive the data characteristics and compared with those of the NDVI and the soil texture. This analysis shows that the soil moisture within the highly correlated soil texture field is affected much by the relatively less correlated vegetation field in the Washita area, where the effect of topography is known to be small. The soil moisture media was derived and its parameters were estimated successfully using the first - and sedcond -order statistics. Keywords : soil moisture, soil moisture model, correlogram, spectrum
 
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Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.31, no.2, 1998³â, pp.145-153
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811920100859)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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