New Dimensions in Groundwater Investigations: Using 3D Visualization Tools to Support Adaptive Strategies

Cross-sections have long been used to illustrate and analyze data as part of groundwater site investigations. However, it is difficult to update paper figures quickly. Interactive 3D visualizations build on paper cross-sections by allowing viewers to assess data, not just on the pre-selected cross-section, but also add and remove data sets as needed, spin the model, and interact with the data. CDM Smith has developed 3D visualizations for several large ongoing groundwater investigations and successfully used them as part of adaptive management strategies. This presentation will discuss our experience with a large, complex groundwater site. During the field investigation phase of the project, the 3D visualization model was updated on a daily basis with data collected by multiple drill rigs. It was then used to determine whether the desired depth interval had been reached. This reduced project costs by targeting drilling efforts. The 3D model was used to visualize the data collected during the field phase as it was being collected and in the context of previously collected data from a variety of sources. Multiple sources and types of data were visualized, including CPT (cone penetrometer test), MIP (membrane interface probe), geophysical logs, hydropunch and monitoring well water quality data, soil boring logs, regional stratigraphic interpretations, and existing paper cross-sections. Our experience with state-of-the-art 3D models demonstrates how this tool can be used to facilitate adaptive management for groundwater investigations, help target field efforts, ensure dollars spent produce maximum value, and enhance communication and teamwork between managers, geologists, and groundwater modelers.