Application of a dasymetric interpolation framework to counterbalance groundwater withdrawal in a wetter region

Authors: Jian Chen*, University of North Alabama, Whitney P Broussard III, JESCO Environmental & Geotechnical Services, Inc., David M Borrok, Geosciences and Geological and Petroleum Engineering Department, Missouri University of Science and Technology, Fabiane B Speyrer, Gulf Coast Inventory & Monitoring Network, National Park Service
Topics: Water Resources and Hydrology, Spatial Analysis & Modeling, Geographic Information Science and Systems
Keywords: dasymetric mapping, disaggregation, proximity analysis, groundwater withdrawal, GIS
Session Type: Virtual Paper
Presentation File: No File Uploaded


The over-use of groundwater is an increasing issue even in wetter regions characterized by abundant rainfall and surface water. In this study we develop a GIS-based framework for spatially disaggregating available groundwater withdrawal information based on ancillary information such as the well’s minimum casing diameter and use these data to identify potential opportunities where surface water could be used to offset groundwater withdrawals. This information was used to identify potential opportunities where surface water could be used to offset groundwater withdrawals. This framework can be widely adapted given such relationship between groundwater and surface water can be established in any wetter regions. The application of this framework to irrigation water demand in the state of Louisiana shows that a significant fraction of groundwater withdrawals can potentially be offset by available surface water. This basic framework can be complemented with additional considerations such as the availability of surface water to more fully evaluate water management scenarios.

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