|
|
|
Çѱ¹¼öÀÚ¿øÇÐȸ / v.32, no.3, 1999³â, pp.215-223
|
TDR(Time Domain Reflectometry)¿¡ ÀÇÇÑ »ç·ÂÅä(Sandy-Gravelly Soil)ÀÇ ÇÔ¼ö·® ÃøÁ¤
( Measurement do Water Content in Sandy-Gravelly Soils using Time Domain Reflectometry ) |
| ±èµ¿ÁÖ;±èÁ¤¼®; °í·Á´ëÇб³ Áö±¸È¯°æ°úÇкÎ;°í·Á´ëÇб³ Áö±¸È¯°æ°úÇаú;
|
|
|
 |
|
| |
| ÃÊ ·Ï |
| ÃÖ±Ù, ±¹³»¿Ü¿¡¼ TDR(Time Domain Reflectometry)±â¹ýÀ» ÀÌ¿ëÇÑ Åä¾ç ÇÔ¼ö·® ÃøÁ¤ÀÌ À¯¿ëÇÑ ±â¼ú·Î½á ¹Þ¾Æµé¿©Á® ¿À°í ÀÖ´Ù. Topp µî, (1980)¿¡ ÀÇÇÏ¿© ÃÖÃÊ·Î Á¦¾ÈµÈ °æÇè½ÄÀÌ TDR¿¡ ÀÇÇØ ÃøÁ¤µÈ À¯Àü»ó¼ö·ÎºÎÅÍ Åä¾ç ÇÔ¼ö·®À» °áÁ¤ÇÏ´Â µ¥¿¡ Æø³Ð°Ô Àû¿ëµÇ¾îÁ® ¿Ô´Ù. ±×·¯³ª, ÀÌ ¹æ¹ýÀÇ Àû¿ë¹üÀ§´Â Áß°£ ÀÔÀÚ Á¶¼ºÀÇ Åä¾ç(Medium-testured soils)¿¡ ÇÑÇØ¼ Á¦ÇѵǾîÁ® ¿Ô´Ù. º» ¿¬±¸¿¡¼´Â Topp ¸ðµ¨ÀÌ »ç·ÂÅä(Sandy-gravelly soils)¿¡¼µµ Àû¿ë°¡´ÉÇÑ Áö¸¦ ¾Ë¾Æº¸°íÀÚ ÇÑ´Ù. °ËÁ¤½ÇÇèÀº Åä¾ç½Ã·á³»¿¡ ¼³Ä¡µÈ 2¼± TDR ŽħÀ» µû¶ó Àü¼ÛµÇ´Â ±¤ÀüÀÚÆÄÀÇ Àü¼Û½Ã°£ ÃøÁ¤°ú Á߷¹ý¿¡ µû¸¥ Åä¾ç ÇÔ¼ö·® °áÁ¤ÀÇ µÎ ºÎºÐÀ¸·Î ±¸¼ºµÇ¾ú´Ù. ½ÇÇè¿¡ »ç¿ëµÈ Åä¾ç½Ã·á´Â 2°³ÀÇ ´Ù¸¥ TDR Žħ±æÀÌ¿¡ ´ëÇÏ¿© Áߺ¹½Ã·á·Î¼ °¢ ½Ã·á´ç ÀÚ°¥ÀÇ Áú·® ÆÛ¼¾Æ¼Áö°¡ ´Ù¸¥ 7°³ÀÇ ÀÔµµ ºÐÆ÷·Î ±¸¼ºµÇ¾ú´Ù. °è»ê °á°ú ToppÀÌ Á¦¾ÈÇÑ ½ÄÀº ÁÖ¾îÁø À¯Àü»ó¼ö¿¡ ´ëÇÏ¿© 3³»Áö 8%Á¤µµ ÇÔ¼ö·®À» °ú´ë ÃßÁ¤Çϰí ÀÖÀ½À» ¾Ë ¼ö ÀÖ¾úÀ¸¸ç, º» ¿¬±¸¿¡¼ »ç·ÂÅä¿¡ ´ëÇÑ »õ·Î¿î °æÇè½ÄÀ» Á¦¾ÈÇÏ¿´´Ù. |
|
| Recently, measurement of soil moisture contents using TDR (time domain reflectometry) has been proven to be viable technique. The first empirical model proposed by Topp et al. (1980) has been widely used to determine moisture contents of soils from the TDR-measured dielectric constants. However, applicability of the model was limited to medium-textured soils. In this study, we investigate the applicability of the model to sandy-gravelly soils. Calibration experiments consisted of measurement on travel time of electromagnetic waveform along the parallel TDR rods inserted into samples and gravimetric determination of soil moisture contents. The experiments are performed for two sets of samples different in the length and each set consisted of seven different particle size distributions with various gavel contents. The calibration results show that the Topp equation overestimated the measured moisture content for a given dielectric constant by 3 to 8%. We therefore propose new empirical relationships valid for sandy-gravelly soils. |
| |
| Ű¿öµå |
| ÇÔ¼ö·®;À¯Àü»ó¼ö;»ç·ÂÅä;TDR;moisture content;dielectnic constant;sandy-gravelly soil; |
| |
|
|
 |
|
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.32, no.3, 1999³â, pp.215-223
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911920063089)
¾ð¾î : Çѱ¹¾î |
|
| ³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø |
|
|
|
|
|
|