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Research Article

Groundwater Flow and Water Budget Analyses using HydroGeoSphere Model at the Facility Agricultural Complex

시설농업단지에서 HydroGeoSphere 모델을 이용한 지하수 유동 및 물수지 분석

Dong-hwan Kang1
,
Yoon Hwan So1
,
Il Kyu Kim2
,
Se-bong Oh3
,
Suhong Kim3
,
Byung-Woo Kim4*
강 동환1
,
소 윤환1
,
김 일규2
,
오 세봉3
,
김 수홍3
,
김 병우4*
1Environmental Research Institute, Pukyong National University
2Department of Environmental Engineering, Pukyong National University
3Kyungpook National University
4K-water Convergence Institute, Korea Water Resources Corporation
1부경대학교 환경공학과
2부경대학교 환경연구소
3한국농어촌공사 경남지역본부
4K-water 융합연구원 물환경연구소
* 교신저자* Corresponding Author
September 2017. pp. 313-322
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Abstract

The purpose of this study is to estimate the surface and subsurface flows through the modelling of the model area and facility agricultural complex, and to calculate the groundwater recharge rate through water budget analysis. From results of surface flow modeling, the surface water is flowed to a depth of about 1 to 5 meters from the upper region (northeast) to the lower region (southeast) of the Miryang River. At the M01 point (upper), the observed surface water flux and the model surface water flux are consistent. At the M02 points(lower), the observed surface water flux and the model surface water flux are a difference of 1%. From results of subsurface flow modeling, the depth of groundwater is similar to elevation in the river and higher to the forest area. Ground water depth considering groundwater pumping is that the model values appears higher than the observed values to be within 1.5 m. From results of surface-subsurface integrated modeling, the groundwater recharge area is estimated about 90% of the model area, and the groundwater recharge rate is estimated 1.92 × 105 m3/day. From results of annual water budget analysis, the groundwater recharge rate per unit area is estimated to be 503.9 mm/year, and average annual rainfall is estimated at around 39%.

Keywords
Artificial recharge
HydroGeoSphere model
Groundwater flow
Water budget analysis

본 연구의 목적은 지표수-지하수 통합 모델을 통해 모델 영역과 시설농업단지(밀양들)의 지표수/지하수 유동을 모의하고 모델 영역의 물수지 분석을 통해 지하수 함양량을 산정하는 것이다. 지표수 유동 모델 결과에서는 밀양강 상류(북동쪽)에서 하류(남동쪽)로 약 1~5 m의 수심으로 지표수가 유동하고 있으며, 모델지역 상류의 M01 지점에서는 지표수 유량 관측 값과 모델 값이 일치하고, 모델지역 하류의 M02 지점에서의 지표수 유량은 1% 정도의 차이를 보인다. 지하수 유동 모델에서는 지하수 심도가 하천에서는 표고와 유사하며 산림 지역으로 갈수록 높아지고, 지하수 양수를 고려한 지하수 심도는 모델 값이 관측 값보다 1.5 m 이내의 범위로 높게 나타난다. 지표수-지하수 통합모델에서는 지하수의 함양 면적이 모델 면적의 90% 정도이고, 지하수 함양량은 1.92 × 105 m3/day인 것으로 나타난다. 연평균 물수지 분석에서는 단위 면적당 지하수 함양량이 503.9 mm/year 로서 연평 균 강우량의 39% 정도로 추정된다.

키워드
시설농업단지
HydroGeoSphere 모델
지하수 유동
물수지 분석
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Information
  • Publisher :Korean Society of Engineering Geology
  • Publisher(Ko) :대한지질공학회
  • Journal Title :The Journal of Engineering Geology
  • Journal Title(Ko) :지질공학
  • Volume : 27
  • No :3
  • Pages :313-322
  • Received Date : 2017-08-28
  • Revised Date : 2017-09-21
  • Accepted Date : 2017-09-24
  • DOI :https://doi.org/10.9720/kseg.2017.3.313
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