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Çѱ¹¼öÀÚ¿øÇÐȸ / v.32, no.4, 1999³â, pp.457-467
¹ü¿ëÅä¾çÀ¯½Ç°ø½ÄÀÇ °­¿ìħ½Äµµ ÃßÁ¤
( Estimation of Rainfall Erosivity in USLE )
±èâ¿Ï;¿ìÈ¿¼·;¼±¿ìÁßÈ£; Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ¼öÀÚ¿øÈ¯°æ¿¬±¸ºÎ;Çѱ¹°Ç¼³±â¼ú¿¬±¸¿ø ¼öÀÚ¿øÈ¯°æ¿¬±¸ºÎ ¿¬±¸À§¿ø;Àü ¼­¿ï´ëÇб³ ÃÑÀå;
 
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À¯¿ªÀÇ Åä¾çÀ¯½Ç·®À» Á¤È®ÇÏ°Ô ÃßÁ¤ÇÏ´Â ¹æ¹ýÀº ¾ÆÁ÷ ¾øÀ¸¸ç ÇöÀç·Î¼­ °¡Àå ¹Ù¶÷Á÷ÇÑ À¯»çÇÑ Áö¿ªÀÇ Åä¾çÀ¯½Ç·® ½ÇÃøÀڷḦ ÀÌ¿ëÇÏ´Â °ÍÀÌ´Ù. ÀÌ·¯ÇÑ ½ÇÃøÀÚ·á°¡ ¾ø´Â °æ¿ì¿¡´Â ¹ü¿ëÅä¾çÀ¯½Ç°ø½Ä(USLE, Universal Soil Loss Equation)°ú °°ÀÌ °æÇèÀûÀ¸·Î Åä¾çÀ¯½Ç·®À» ÃßÁ¤ÇÏ´Â ¹æ¹ý µîÀ» ÀÌ¿ëÇÒ ¼ö ÀÖ´Ù. ¹ü¿ëÅä¾çÀ¯½Ç°ø½ÄÀÇ ÀÎÀÚ Áß Áö¿ªÀÇ ¼ö¹® Ư¼º¿¡ Áö¹èµÇ´Â µÇ´Â °ÍÀ¸·Î °­¿ìħ½Äµµ(rainfall erosivity) {{{{{ R}_{}}}}} ÀÌ ÀÖ´Ù. º» ¿¬±¸¿¡¼­´Â Áö¼Ó±â°£ 0.5, 1, 2, 3, 6, 12, 24-hr¿¡ ´ëÇÑ ÀçÇö±â°£ 2, 5, 10, 20, 30, 50, 80, 100, 150, 200, 500-yrÀÇ È®·ü°­¿ì·®À» ±¸ÇÏ¿´°í À̸¦ ÀÌ¿ëÇÏ¿© ºóµµº° Áö¼Ó±â°£ 24-hr ¼³°èÈ£¿ìÀÇ ÁöÁ¡º° {{{{ { R}_{ } }}}} °ªÀ» ±¸ÇÏ¿´´Ù. ÁöÁ¡º°{{{{ { R}_{ } }}}} °ªÀ» ³»»ðÇÏ¿© ¿ì¸® ³ª¶ó Àü¿ªÀÇ µî{{{{ { R}_{ } }}}}¼±µµ¸¦ ÀÛ¼ºÇÏ¿´´Ù. º» ¿¬±¸¿¡¼­ ±¸ÇØÁø ÀçÇö±â°£ 5-yr, Áö¼Ó±â°£ 24-hr ¼³°èÈ£¿ìÀÇ µî{{{{ { R}_{ } }}}}¼±µµ´Â ¿¬Æò±Õ µî{{{{ { R}_{ } }}}}¼±µµ¿Í ¸Å¿ì À¯»çÇÏ¿´°í, ÀÓÀÇ ÀçÇö±â°£¿¡ ÇØ´çÇÏ´Â {{{{ { R}_{ } }}}}°ªÀº ÀçÇö±â°£ 5-yr ¶Ç´Â ¿¬Æò±Õ{{{{ { R}_{ } }}}}°ª¿¡ ÀûÀýÇÑ ¹èÀ²À» °öÇÏ¿© ÃßÁ¤ÇÒ ¼ö ÀÖÀ½À» ¾Ë ¼ö ÀÖ¾ú´Ù. º» ¿¬±¸¿¡¼­ ±¸ÇØÁø ÀçÇö±â°£º° Áö¼Ó½Ã°£ 24-hr ¼³°èÈ£¿ìÀÇ µî{{{{{R}_{}}}}} ¼±µµ´Â ħ»çÁö µîÀÇ ¼³°è¿¡ À¯¿ëÇÏ°Ô ÀÌ¿ëµÉ ¼ö ÀÖÀ» °ÍÀ¸·Î ÆÇ´ÜµÈ´Ù.
No complete methods for estimating soil loss, included by rain storms, from a small watershed are available yet, and the best recommended method is to use measured data from the watershed. When no measured data is available from the watershed, empirical models for estimating the soil loss, such as the Universal Soil Loss Equation(USLE), is well recommended in practice. For using this equation, it is necessary to estimated the rainfall erosivity, commonly expressed as R, of the watershed. In this study, first we collected data of the probable rainfalls with the return periods of 2, 5, 10, 20, 30, 50, 80, 100, 200, and 500-yr and with the duration hours of 0.5, 1, 2, 3, 6, 12, and 24-hr. Using this data, we calculated the design values for R for the return period of 24-hr at each major rainfall-measuring station nationwide. Then we constructed the iso-erodent map of Korea for each return period of the 24-hr design storm. This study shows that the 24-hr duration iso-erodent map of the 5-yr return period is very similar to the annual average iso-erodent map of Korea. This study also shows that the 24-hr duration R-values of a certain return period can be estimated by multiplying certain parameters, obtained from this study, to the 24-hr duration R-values for the 5-yr return period or the annual average R-values. Finally, the R-values of the design storm with the 24-hr return period obtained from this study can be used for designing the settling basins at small watersheds.
 
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¹ü¿ëÅä¾çÀ¯½Ç°ø½Ä;°­¿ìħ½Äµµ;È®·ü°­¿ì·®;µî R ¼±µµ;ħ»çÁö;universal soil loss equation;rainfall erosivity;probable rainfall;iso-erodent map;settling basin;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.32, no.4, 1999³â, pp.457-467
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO199911920063217)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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