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Distribution of Soil Water Storage at a Hillslope in Sulmachun Watershed

설마천 사면의 토양층 저류량의 분포양상에 관한 연구

Jang, Eun-se;Kim, Sang-Hyun;Lee, Jung-Hoon
장은세;김상현;이정훈

  • Received : 2016.04.01
  • Accepted : 2016.06.30
  • Published : 2016.06.30

Abstract

The storage variation in the vadose zone at a hillslope is important to understand the hydrological process. This study explores seasonal changes of soil water storage at a hillslope scale. The study was conducted on a hillslope of Beomrunsa, located in the Seolma-cheon river basin in Paju-si, Gyeonggi-do. Using soil moisture measurements through Time Domain Reflectometry (TDR), storage, discharge, and response constant were calculated for all monitoring points on a hillslope between March and November, 2010. This study found that temporal changes in storage are resulted from the rainfall distribution patterns. Analysis of the spatial changes in storage indicated that the soil water storage tends to increase towards the downslope direction. The discharges calculated based on the soil water measurements exhibited a high correlation with observation discharge. The storage response constant was high during the autumn which demonstrates the increased contribution from upslope is responsible for the occurrence of soil water recharge during autumn.

Keywords

Soil moisture;Soil storage;Discharge

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Acknowledgement

Grant : BK21플러스

Supported by : 부산대학교