Ed Maurer Partitioning precipitation Partitioning precipitation into rain and snow for into rain and snow for event-based hydrologic event-based hydrologic modeling in the Pacific modeling in the Pacific Northwest U.S. Northwest U.S. Edwin Maurer Civil Engineering Department Santa Clara University [email protected]H51G-04
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Ed Maurer Partitioning precipitation into rain and snow for event-based hydrologic modeling in the Pacific Northwest U.S. Edwin Maurer Civil Engineering.
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Ed Maurer
Partitioning precipitation into rain Partitioning precipitation into rain and snow for event-based and snow for event-based
hydrologic modeling in the Pacific hydrologic modeling in the Pacific Northwest U.S. Northwest U.S.
Edwin Maurer
Civil Engineering DepartmentSanta Clara University [email protected]
H51G-04
Ed Maurer
MotivationMotivation
Precipitation type can drive flood simulations
Determination of type in hydrology models is dubious
Unique data presents opportunities to improve precipitation type determination with radar
Potential for transferability
Ed Maurer
Primary QuestionsPrimary Questions
• Do surface temperature-based methods work adequately for determining whether precipitation is falling as rain, snow, or a mixture?
• Can using a reflectivity from a vertically-pointing radar be used to improve this, and ultimately streamflow simulations?
• Can information on derived rain-snow partitioning be transferred to neighboring watersheds?
Ed Maurer
Area of FocusArea of Focus
Improvement of Microphysical PaRameterization through Observational Verification Experiment (IMPROVE-2).
Intensive field observation campaign: 26 Nov- 22 Dec 2001
IMPROVE-2 domain overlaps with South Santiam River basin: total basin area of 1,440 km2.
Ed Maurer
South Santiam River BasinSouth Santiam River Basin