물수지 분석 기법을 이용한 논 농업용수 회귀수의 하천유량 기여도 평가

초록

In this study, we assessed the contribution of agricultural Stream Return Flow (SRF) from paddy fields to stream flow using a water balance model. The SRF, which includes Rapid Return Flow, Base Return Flow, and Distributed Management Water, was estimated by excluding evapotranspiration, Delayed Return Flow, and Channel Loss from the agricultural Irrigation Water Supply. For this purpose, we selected the Hungup, Sotae, and Woljeong reservoirs, located in the provinces of Gangwon-do, Gyeongsangnam-do, and Jeollabuk-do, respectively. Overall, the SRF amounts from the Hungup, Sotae, and Woljeong reservoirs showed positive contributions (28.1%, 49.6%, and 76.3%, respectively) to the stream flow. Our findings also indicated that the contributions of SRF varied over time, influenced by environmental factors such as precipitation, water requirements for individual crop growth stages, and artificial water management practices. These results confirm that SRF contributes to the health of agricultural environments by maintaining the quantity of stream flow.

키워드