Keywords

SWAT-MODFLOW, Graphical user interface, QGIS

Start Date

25-6-2018 9:00 AM

End Date

25-6-2018 10:20 AM

Abstract

A large number of integrated groundwater-surface water flow models have been developed in recent years to explore water availability under various land use, climate, and population scenarios in river basins. However, the use of these models has been limited due to their complexity in data management, preparing input files, and viewing and interpreting model outputs. One of these models is SWAT-MODFLOW, a recently developed modeling code that is being used in regions worldwide for water resources analysis. In this study, we present QSWATMOD, a QGIS-based Graphical User Interface (GUI) for SWAT-MODFLOW model that couples the land surface hydrology model SWAT with the groundwater flow model MODFLOW. QSWATMOD, written in Python, creates the linkage files between SWAT and MODFLOW models, runs the simulation, and displays results in a user-friendly geographic information system (GIS) environment. QSWATMOD is equipped with several Python libraries that assist in storing and retrieving user and default values, and performing the linkage and simulation processes. QSWATMOD uses various geo-processing functionalities (e.g., selection, intersection, union, estimation of geometry) of the open source geographic information system, QGIS. The use of QSWATMOD is demonstrated through two case studies: a 471 km2 regional site in the Middle Bosque River Watershed in central Texas and the 334 km2 Little River Experimental Watershed (LREW) near Tifton, Georgia. As the number of SWAT-MODFLOW users grows worldwide, QSWATMOD can be a valuable tool to assist users in creating and managing SWAT-MODFLOW projects.

Stream and Session

E1: Coupled Surface-Subsurface Hydrologic Modelling

COinS
 
Jun 25th, 9:00 AM Jun 25th, 10:20 AM

QSWATMOD: A QGIS-based graphical user interface for application and evaluation of SWAT-MODFLOW models

A large number of integrated groundwater-surface water flow models have been developed in recent years to explore water availability under various land use, climate, and population scenarios in river basins. However, the use of these models has been limited due to their complexity in data management, preparing input files, and viewing and interpreting model outputs. One of these models is SWAT-MODFLOW, a recently developed modeling code that is being used in regions worldwide for water resources analysis. In this study, we present QSWATMOD, a QGIS-based Graphical User Interface (GUI) for SWAT-MODFLOW model that couples the land surface hydrology model SWAT with the groundwater flow model MODFLOW. QSWATMOD, written in Python, creates the linkage files between SWAT and MODFLOW models, runs the simulation, and displays results in a user-friendly geographic information system (GIS) environment. QSWATMOD is equipped with several Python libraries that assist in storing and retrieving user and default values, and performing the linkage and simulation processes. QSWATMOD uses various geo-processing functionalities (e.g., selection, intersection, union, estimation of geometry) of the open source geographic information system, QGIS. The use of QSWATMOD is demonstrated through two case studies: a 471 km2 regional site in the Middle Bosque River Watershed in central Texas and the 334 km2 Little River Experimental Watershed (LREW) near Tifton, Georgia. As the number of SWAT-MODFLOW users grows worldwide, QSWATMOD can be a valuable tool to assist users in creating and managing SWAT-MODFLOW projects.