| Title |
A Study on Typhoon Impacts in the Nakdong River Basin Associated with Decaying Phases of Central-Pacific El Nino |
| Authors |
김종석(Kim, Jong-Suk) ; 손찬영(Son, Chan-Young) ; 이주헌(Lee, Joo-Heon) ; 문영일(Moon, Young-Il) |
| DOI |
https://doi.org/10.12652/Ksce.2014.34.1.0135 |
| Keywords |
CP 엘니뇨;태풍;엘니뇨 진화패턴;낙동강유역 CP El Ni$\tilde{n}$o;Typhoon;El Ni$\tilde{n}$o evolution pattern;Nakdong river basin |
| Abstract |
We investigate the influence of spatial rainfall distribution on hillslope soil erosion through laboratory experiments. Two distinct spatial distributions are examined in this study, i.e., rainfall concentrated on central area versus upper area of hillslope. During the entire period of 8 hours for each experiment, direct runoff, subsurface flow, and sediment yield are measured at high temporal resolution (10 minutes). Compared to the case that rainfalll concentrated on central area, upstream concentrated rainfall results in lower peak of the sediment yield curve while greater cumulative sediment yield. Cumulative sediment yield increases over time linearly but its growth rate shows a sudden decrease at around 2 hours. This should be taken into consideration when temporal variability of sediment yield is estimated from observed total amount, and demonstrates the necessity of measuring sediment yield at high temporal resolution. |