Technical Integrity / Collaboration / Exceptional Results

Aquifer Storage and Recovery Feasibility Study

AquiferIntegral developed a 3-dimensional geologic and groundwater model to support a feasibility study for a large-scale aquifer storage and recovery (ASR) system for agricultural irrigation in Umatilla, Oregon. Integral used EVS-Pro and ArcGIS software to create the volumetric subsurface model, employing spatial data that included well borehole logs and well groundwater elevations from the feasibility study. The model domain covered an area of approximately 20 square miles and included five complex geologic layers to a depth of 250 ft. The geologic block model of the project basin correlated with the feasibility study’s preexisting 2-dimensional cross-sectional diagrams. Groundwater elevations were interpolated to model the existing groundwater aquifer’s potentiometric surface. Integral developed an innovative quantitative technique to animate the conceptual response of the existing potentiometric surface to the aquifer recharge process. The model was also used to calculate the volume of existing groundwater per unit change in the potentiometric surface (i.e., 10 ft of hydraulic head) within the ASR basin. Several animations of the geology and ASR process were developed by Integral and used in meetings with a variety of stakeholders. The resulting model and groundwater volume estimates provided an effective planning and collaboration tool that showed the feasibility study results in an intuitive animation for technical and nontechnical audiences.

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