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Sensitivity Analysis of Groundwater Model Predictions Associated with Uncertainty of Boundary Conditions: A Case Study  

Na, Han-Na (Department of Geoenvironmental Science, Kongju National University)
Koo, Min-Ho (Department of Geoenvironmental Science, Kongju National University)
Cha, Jang-Hawn (Department of Geoenvironmental Science, Kongju National University)
Kim, Yong-Je (Korea Institute of Geoscience and Mineral Resources)
Publication Information
Journal of Soil and Groundwater Environment / v.12, no.3, 2007 , pp. 53-65 More about this Journal
Abstract
Appropriate representation of hydrologic boundaries in groundwater models is critical to the development of a reliable model. This paper examines how the model predictions are affected by the uncertainty in the conceptualization of the hydrologic boundaries including groundwater divides, streams, and the lower boundaries of the flow system. The problem is analyzed for a study area where a number of field data for model inputs were available. First, a groundwater flow model is constructed and calibrated for the area using the Visual Modflow code. Recharge rate is used for the unknown variable determined through the calibration process. Secondly, a series of sensitivity analyses are conducted to evaluate the effects of model uncertainties embedded in specifying boundary conditions for streams and groundwater divides and specifying lower boundary of the bedrock. Finally, this paper provides some guidelines and discussions on how to deal with such hydrologic boundaries in view of developing a reliable conceptual model for the groundwater flow system of Korea.
Keywords
Conceptual model; Sensitivity analysis; Boundary condition; Groundwater divide; Fractured-rock aquifer;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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