Hardpan Vernal Pool Hydrology
While working at the University of Idaho, Boise – Center for Ecohydraulics, Mr. Campbell was principal investigator and researcher in leading a multi-year assessment to quantify the hydroregime of created and natural vernal pools at two established restoration / mitigation sites where created pools have been constructed adjacent to natural pools.
The objectives of this study were to identify the hydrologic differences between created and natural pools and to quantify the potential hydrologic impacts of created pools on adjacent natural pools.
The assessment included a combination of continuous hydrologic monitoring (i.e., pool levels, perched water table, rainfall, air and water temp, etc.) and numerical modeling of the vadose zone, using HYDRUS 3D (www.pc-progress.com), to quantify the components of the hydroregime (i.e., direct rainfall, subsurface lateral flow, overland flow, etc.) at the field and pool scales.
To date, four seasons of field measurements have been collected. The field measurements will be used to calibrate and validate the physically-based 3D numerical models, which will ultimately be used to develop quantitative criteria (e.g., buffer distance) to inform future restoration / mitigation design. The numerical models will also be used to understand the effects of climate change on pool hydroregime.