Preprints
https://doi.org/10.5194/gmd-2018-268
https://doi.org/10.5194/gmd-2018-268
Submitted as: development and technical paper
 | 
30 Nov 2018
Submitted as: development and technical paper |  | 30 Nov 2018
Status: this preprint was under review for the journal GMD. A final paper is not foreseen.

A Conceptual Framework for Integration Development of GSFLOW Model: Concerns and Issues Identified and Addressed for Model Development Efficiency

Chao Chen, Sajjad Ahmad, and Ajay Kalra

Abstract. In Coupled Groundwater and Surface-Water Flow (GSFLOW) model, the three-dimensional finite-difference groundwater model (MODFLOW) plays a critical role of groundwater flow simulation, together with which the Precipitation-Runoff Modeling System (PRMS) simulates the surface hydrologic processes. While the model development of each individual PRMS and MODFLOW model requires tremendous time and efforts, further integration development of these two models exerts additional concerns and issues due to different simulation realm, data communication, and computation algorithms. To address these concerns and issues in GSFLOW, the present paper proposes a conceptual framework from perspectives of: Model Conceptualization, Data Linkages and Transference, Model Calibration, and Sensitivity Analysis. As a demonstration, a MODFLOW groundwater flow system was developed and coupled with the PRMS model in the Lehman Creek watershed, eastern Nevada, resulting in a smooth and efficient integration as the hydrogeologic features were well captured and represented. The proposed conceptual integration framework with techniques and concerns identified substantially improves GSFLOW model development efficiency and help better model result interpretations. This may also find applications in other integrated hydrologic modelings.

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Chao Chen, Sajjad Ahmad, and Ajay Kalra

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Chao Chen, Sajjad Ahmad, and Ajay Kalra
Chao Chen, Sajjad Ahmad, and Ajay Kalra

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Short summary
This study proposed a conceptual framework for development of integrated surface and groundwater flow model, GSFLOW. Study provides guidance on addressing common challenges in the model development, i.e., model conceptualization, data exchange, model calibration, and sensitivity analysis. An application of the framework demonstrated that both model development efficiency and hydrologic characterization improved. The proposed framework can be useful for other similar modeling efforts.