제방 배수통문 하부 공동 탐지를 위한 수치모의에 의한 GPR 신호 특성 분석

Abstract

As the agricultural land use shifts from paddy to upland, ensuring reservoir water supply stability for upland crop irrigation becomes essential. Theobjectives of this study were to estimate the irrigation water requirements considering the upland irrigation scenario and to evaluate the reliability ofthe water supply from the agricultural reservoir using resilience indexes. Two study sites, Sinheung and Hwajeong, were selected, and soybean and redpeppers, the most water-intensive crops, were selected as study crops, respectively. For the irrigation scenario, two irrigation methods of traditionalscheduling (which irrigates all sites at once) and rotational scheduling (which distributes irrigation by districts), along with the upland conversion rate,were considered. The net irrigation requirement was estimated through a water balance analysis. The stability of the reservoir was evaluated usingresilience indexes based on the simulated 10-years reservoir water levels and drought criterion. Overall, the water supply of the reservoir was evaluatedas stable during the simulated 10 years, except for the one year. Compared to the two irrigation methods, rotational scheduling resulted in lowerirrigation water usage in both sites, with reductions of 1.6%, and 0.3%, respectively. As the upland conversion rate increases, the water deficit couldbe intensified in Hwajeong with a conversion rate exceeding 50%, showing the number of deficit(ND) over the one and a rapid increase in the deficitratio(DR). It was confirmed that the reservoir operation criteria can be enhanced by incorporating resilience indicators along with crop growthinformation, thus, this will be a further study.