RESEARCH:

I am interested in innovative measurement methods and modeling techniques that help improve our understanding of watershed hydrometeorological processes. My objectives are to apply and advance scientific knowledge concerned with the water balance components on local and regional scales to improve hydrologic and atmospheric forecasts at the intraseasonal to seasonal time scales.

SELECTED TOPICS:

- Comparing modeled spatial distribution of snow depth, snow density and snow water equivalent based on ground surveyed data to derived snow distribution (depth, density and snow water equivalent) from the National Operational Hydrologic Remote Sensing Center's SNOw Data Assimilation System (SNODAS) regional modeled snow depth, snow density, and snow water equivalent.

- Assessing the accuracy of estimated surface snowpack sublimation and coarse resolution land surface model (LSM) estimated snowpack sublimation. Quantifiing errors and sensitivity associated with surface based snowpack sublimation estimates at multiple high elevation regions using several methods: bulk aerodynamic profile, aerodynamic profile, and the eddy covariance. Evaluating the SNODAS modeled sublimation to surface station estimated sublimation, and scaled SNODAS data for comparison to sublimation estimated from the North American Land Data Assimilation System (NLDAS) MOSAIC model. Comparing and quantifing snowpack sublimation rates temporally (hourly, daily, and seasonal) and spatially (local (surface data), 1-km 2 (SNODAS), ~12-km 2 (NLDAS)).

- Comparing snowmelt using snow energy balance model and temperature index model to quantify the spatial and temporal snowmelt contribution and stream runoff to alpine watersheds.

- Analyzing streamflow sensitivity to varying scales of temporal and spatial precipitation estimates as input to physically-based runoff model (WATFLOOD) for the November 2006 precipitation event along the Oregon coastal range.

- Evaluating, designing and optimizing sampling schemes for alpine snow surveys based on computed physiographic terrain parameters.