Hydrologic Modeling and Analysis

Characterizing Hydrologic Conditions

In-stream flow targets for environmental purposes are frequently tiered to real-time hydrologic conditions. However, characterizing those conditions to appropriately reflect hydrologic variability, especially in heavily-regulated river systems, can be a challenge. Don Anderson worked with stakeholders to develop criteria for the Platte River Recovery Program (USA) that set real-time flow targets determining when water regulation facilities associated with the species recovery effort can divert or store flows without conflicting with recovery efforts. This work is documented in Characterization of Hydrologic Conditions to Support Platte River Species Recovery Efforts.

Road Erosion Modeling

Working with the U.S. National Park Service, Don Anderson conducted watershed-scale studies of long-term and present-day erosion and sediment delivery on St. John, U.S. Virgin Islands. He established the first quantitative estimates of erosion and sediment delivery associated with specific land use activities on the island, and developed recommendation for sediment control practices to protect sensitive marine resources, using GIS-based models of surface hydrology, slope stability, and soil erosion. Study results were published as a 153-page Park Service technical publication.

Instream Flow Recommendations

Working with partners of the Upper Colorado River Recovery Program, and based on a review of 25+ years of biologic, hydrologic, and fluvial geomorphologic data, Don Anderson and co-authors developed interim flow recommendations for federally listed endangered fish associated with the White River in western Colorado and eastern Utah. These recommendations established the basis for subsequent fish protection and recovery strategies being incorporated into a White River endangered fish management plan.