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Çѱ¹¼öÀÚ¿øÇÐȸ / v.31, no.2, 1998³â, pp.123-132
TDR(Time Domain Reflectometry)À» ÀÌ¿ëÇÑ Åä¾ç¼ö³óµµ ÃøÁ¤¿¡ °üÇÑ ¿¬±¸
( A study on the Measurement of Soil Water Concentration by Time Domain Reflectometry )
¹ÚÀçÇö; ¼­¿ï´ëÇб³ °øÇבּ¸¼Ò Ưº°¿¬±¸¿ø;
 
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ºñÆ÷È­´ë¿¡¼­ÀÇ ÁöÇϼö ¿À¿°¿øÀÇ À̼ÛÀ» °üÃøÇÏ´Â °ÍÀº ¸Å¿ì ¾î·Á¿î °Å½Â·Î ¾Ë·ÁÁ® ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â ÇÔ¼ö·®°ú ³óµµ°¡ ´Ù¸¥ ½Ã·á¸¦ ÀÌ¿ëÇÏ¿© ºñÆ÷È­ ¿ëÁ¸ ¿À¿°¿øÀÇ ³óµµ¸¦ ÃøÁ¤Çϱâ À§ÇÑ TDRÀÇ Àû¿ë°¡´É¼º¿¡ ´ëÇÑ °ËÁ¤½ÇÇèÀ» ¼öÇàÇÏ¿´´Ù. ÃʱâÀüÀÚ±âÆÄ¿¡ ´ëÇÑ TDR¹ÝÇâÆÄÀÇ °¨¼âÁ¤µµ¸¦ ÀÌ¿ëÇÏ¿© Åä¾çÀÇ ÃÑÀü±âÀüµµµµ¸¦ ÃøÁ¤ÇÏ°Ô µÇ´Âµ¥ À̶§ ÇÔ¼ö·®ÀÌ ÀÏÁ¤ÇÒ °æ¿ì ÃÑÀü±âÀüµµµµ¿Í Åä¾ç¼öÀÇ ³óµµ°ü°è´Â ¼±Çü°ü°è¸¦ À¯ÁöÇÑ´Ù´Â °¡Á¤À» ±âº»À¸·ÎÇÑ´Ù. º» ¿¬±¸¿¡¼­´Â ¼¼°¡ÁöÀÇ ³óµµ¿Í üÀûÇÔ¼ö·®À» °®´Â ½Ã·á¸¦ ¼ºÇüÇϰí À̶§ÀÇ TDR ¹ÝÇâ°î¼±À» ÃøÁ¤ÇÏ¿© Dalton µî(1984), Topp µî(1988), Yanuka µî(1988), Zegelin µî (1989)ÀÌ Á¦¾ÈÇÑ ÃßÁ¤½ÄÀ¸·Î ÅëÃʾçÀü±âÀüµµµµ¸¦ ±¸ÇÏ¿´´Ù. ½ÇÇè°á°ú ZegelinµîÀÌ Á¦¾ÈÇÑ ½ÄÀ» Á¦¿ÜÇÑ ¼¼ °¡Áö ½ÄµéÀº ¸Å¿ì ÁÁÀº Åä¾ç¼öÀÇ ³óµµ¿Í ÃÑÀü±âÀüµµµµÀÇ ¼±Çü°ü°è¸¦ ³ªÅ¸³»¾ú´Ù. µû¶ó¼­ ÀÌ ¼¼°¡Áö ÃßÁ¤½ÄµéÀº ¿ëÁ¸ ¿À¿°¿øÀÇ ³óµµ¸¦ ÃßÁ¤ÇÔ¿¡ ÀÖ¾î ¸Å¿ì À¯¿ëÇÑ ½ÄÀ¸·Î ÆÇ´ÜµÇ¸ç ÀÌ ÃßÁ¤½ÄµéÀ» ÀÌ¿ëÇÏ´Â TDR ºñÆ÷È­ ¿ëÁ¸ ¿À¿°¿ø ÃøÁ¤¹ýÀº ½Ç³»½ÇÇè°ú ÇöÀå½ÇÇè¿¡ ÀÖ¾î ¸Å¿ì À¯¿ëÇϸ®¶ó ÆÇ´ÜµÈ´Ù. Çٽɿë¾î : ºñÆ÷È­´ë, TDR, ÃÑÀü±âÀüµµµµ, Åä¾ç¼ö³óµµ, üÀûÇÔ¼ö·®
Monitoring solute transport has been known to be difficult especially for the unsaturated soil. The object of this study is to investigate the TDR application to monitoring solute concentration in the vadose zone. The TDR calibration test was conducted for soil samples with various water contents and concentrations. The voltage attenuation of electromagnetic wave of TDR was used to estimate the bulk electrical conductivity of a soil. The relationship between the bulk soil electrical conductivity and the solute concentration was assumed to be linear at a constant volumetric soil water content. In this study four proposed relationships were compared using data obtained from KCI solution at three different concentrations. Relationships given by Topp, Daltaon, Yanuka showed the linearity between the bulk soil electrical conductivity and the solute concentration, which were more pronounced than Zegelin's. The three relationships were found to be useful to measure the solute concentration in the vadose zone. In addition, TDR method was proven to be a viable technique in monitoring solute transport through unsaturated soils in transient flow condition. of Mt. Odae based on the soil humidity gradient showed 3 types: (1) the forest of Pinus densiflora under the mesic or xeric conditions of the low altitudinal area, (2) the forest of Acer including A. mono, A. pseudo-sieboldianum and Tilia amurensis under the submesic or subxeric conditions and (3) the forest of Quercus including Q. mongolica of the higher elevational area and Q. variabilis of the lower elevational area under the xeric condition. Water content, organic matter and total nitrogen of soil were relatively low in Pinus densiflora and Quercus variabilis communities while they were relatively high in Betula platyphylla var. japonica and Quercus mongolica communities. According to the result of cluster analysis based on similarity indices of the communities, the proposed successional sere in the forest vegetation of Mt. Odae was as follows. P. densiflora community longrightarrow P. densiflora + Q. mongolica community longrightarrow Q. mongolica + A. pseudo-sieboldianum community. P. densiflora community longrightarrow P. densiflora + Q. variabilis community longrightarrow Q. variabilis community longrightarrow Q. mongolica + Q. variabilis community longrightarrow Q. mongolica + A. pseudo-sieboldianum community. [T. amurensis community longrightarrow Q. mongolica + T. amurensis community A. mono longrightarrow Q. mongolica + A. mono community B. platyphylla var. japonica community] longrightarrow Q. mongolica + B. platyphylla var. japonica community.
 
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ºñÆ÷È­´ë;ÃÑÀü±âÀüµµµµ;Åä¾ç¼ö³óµµ;üÀûÇÔ¼ö·®;TDR;bulk soil electrical conductivity;solute concentration;volumetric soil water content;vadose zone;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.31, no.2, 1998³â, pp.123-132
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199811920100839)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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