논 관개 지역의 지하수위 관측을 통한 시공간적 지하수위 변동 특성 분석

Abstract

This study aimed to establish a field observation system for monitoring tempo-spatially precise changes of groundwater level and to analyze the impactof rainfall and irrigation practices on groundwater changes in paddy regions. The monitoring system comprising of all nine groundwater observationwells and four ponding depth sensors was installed in a part of paddy regions benefited from Gosam reservoir, Ansung-si. The result of grundwater levelchange during the irrigation period in 2002 was averagely 0.51 m higher than that during the non-irrigation period. In particular between March beforepuddling and June after transplanting, there was maximum 1.23 m rise in groundwater level. On the other hand, concerning the change in ponding depth,groundwater level changed similarly, and hourly rainfall was revealed to have better correlation with 24-hour delayed hourly groundwater level than withthe corresponding groundwater level. Eventually, this study could be referenced for further studies to set up a more comprehensive and sustainablemonitoring system of groundwater conditions.