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Çѱ¹¼öÀÚ¿øÇÐȸ / v.40, no.11, 2007³â, pp.887-898
ÃæÁÖ´ï »ó·ùÀ¯¿ªÀÇ À¯»ç ¹ß»ý¿¡ ´ëÇÑ ½Ã°ø°£ÀûÀΠƯ¼º
( Temporal and Spatial Characteristics of Sediment Yields from the Chungju Dam Upstream Watershed )
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A physically based semi-distributed model, SWAT was applied to the Chungju Dam upstream watershed in order to investigate the spatial and temporal characteristics of watershed sediment yields. For this, general features of the SWAT and sediment simulation algorithm within the model were described briefly, and watershed sediment modeling system was constructed after calibration and validation of parameters related to the runoff and sediment. With this modeling system, temporal and spatial variation of soil loss and sediment yields according to watershed scales, land uses, and reaches was analyzed. Sediment yield rates with drainage areas resulted in $0.5{sim}0.6ton/ha/yr$ excluding some upstream sub-watersheds and showed around 0.51 ton/ha/yr above the areas of $1,000km^2$. Annual average soil loss according to land use represented the higher values in upland areas, but relatively lower in paddy and forest areas which were similar to the previous results from other researchers. Among the upstream reaches, Pyeongchanggang and Jucheongang showed higher sediment yields which was thought to be caused by larger area and higher fraction of upland than other upstream sub-areas. Monthly sediment yields at the main outlet showed same trend with seasonal rainfall distribution, that is, approximately 62% of annual yield was generated during July to August and the amount was about 208 ton/yr. From the results, we could obtain the uniform value of sediment yield rate and could roughly evaluate the effect of soil loss with land uses, and also could analyze the temporal and spatial characteristics of sediment yields from each reach and monthly variation for the Chungju Dam upstream watershed.
 
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À¯»ç;Åä¾çħ½Ä;ÃæÁÖ´ï;SWAT;Sediment;Soil loss;Chungju Dam;
 
Çѱ¹¼öÀÚ¿øÇÐȸ³í¹®Áý / v.40, no.11, 2007³â, pp.887-898
Çѱ¹¼öÀÚ¿øÇÐȸ
ISSN : 1226-6280
UCI : G100:I100-KOI(KISTI1.1003/JNL.JAKO200703534252100)
¾ð¾î : Çѱ¹¾î
³í¹® Á¦°ø : KISTI Çѱ¹°úÇбâ¼úÁ¤º¸¿¬±¸¿ø
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