MetStat’s team of hydrometeorological experts is currently involved in a number of different projects that include risk-based precipitation frequency analyses, storm analyses, and site-specific probable maximum precipitation assessments, to name a few. A sample of major past projects can be found listed below.
72-Hour Precipitation Frequency Analysis for Tropical Storms in South Carolina
To support Duke Energy’s Focused Evaluation and Integrated Assessment, MetStat and MGS Engineering developed the watershed-specific precipitation frequency relationship for the controlling 72-hour storm type applicable to the Black Creek watershed above the Robinson Nuclear Plant in South Carolina. After evaluating the controlling storm type as Tropical Storms and Remnants, we developed estimates that extend to the equivalent annual exceedance probability (AEP) of the 72-hour probable maximum precipitation (PMP). Deliverables included scalable temporal and spatial storm templates. Coupling the templates with the precipitation-frequency results, a HEC-HMS hydrologic model can be initialized with plausible, synthetic storm events for computing a series of hydrologic hazard curves.
Trinity River Basin Extreme Precipitation Project
MetStat, partnered with MGS Engineering, is analyzing extreme storms and regional precipitation-frequency for USACE Dam Safety Program’s Hydrologic Hazards Team (HHT). For this project, we are providing spatial and temporal data of extreme storms to be used for hydrologic modeling and calibration. We are also conducting precipitation-frequency analyses on different storm types (Mid-Latitude Cyclones, Mesoscale Storms with Embedded Convection, Local Storms and Tropical Storm Remnant Storms) that will be used to conduct stochastic modeling for floods generated by the various storm types to develop hydrologic hazard curves.
Colorado-New Mexico Regional Extreme Precipitation Study
BC Hydro Upper Columbia River Extreme Floods
Bear River Site-Specific Probable Maximum Precipitation (PMP)
Tennessee Valley Authority Hydrologic Hazards Assessment
Southern California Edison Hydrologic Risk Assessment
Precipitation Storm Analyses for Maricopa County Flood Control District
Consolidation and Enhancement of Hydrologic Model Parameter Estimation Tools
- Integration of NHD Plus V2 data for basin delineation
- “Rapid” tool for multiple watersheds
- CAP Tool integrates updated PRISM climatology grids and 10-m NED DEM
- SNOW-17 ADC Tool developed using SNODAS SWE (snow water equivalent) and computed AESC (areal extent of snow cover)
- Pre-generated archive of daily, 3-day, and Jan-Aug subsets of SWE/AESC
The project concluded with the development of a user’s guide and on-site training at the CNRFC in Sacramento, CA in April 2016.