American Society of Civil Engineers


Evaporation and Snowmelt Estimates from Satellite Data


by Woodruff Miller, (Brigham Young Univ, Provo, United States)

pp. 298-303

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Document type: Conference Proceeding Paper
Part of: Hydraulics/Hydrology of Arid Lands (H²AL)
Abstract: Satellite imagery has been used to estimate saltwater evaporation and snowmelt runoff. Water surface temperatures can be obtained from satellite thermal infrared data. Saltwater evaporation is determined by multiplying pan evaporation by a pan coefficient and a salt concentration-dependent salt coefficient. Temperatures and evaporation values on Great Salt Lake were correlated for various time periods and locations. Results indicate that this methodology of using satellite-derived water surface temperatures along with salt concentrations can be used to estimate lake evaporation. The Martinec-Rango Snowmelt-Runoff Model (SRM) uses snowcover derived from satellite imagery to develop snow depletion curves, and along with basin parameters and meterological data, runoff rates are simulated. The model was applied in the forecasting mode on the Sevier Basin in Utah with calibrated parameters, projected snow depletion curves, and predicted temperature and precipitation. With one to two months of calibration, the following three to four months of runoff have been forecasted with good correlation to the measured flowrates.


ASCE Subject Headings:
Snowmelt
Evaporation
Remote sensing
Satellites
Lakes
Utah
Water temperature
Salinity

Author Keywords:
Hydrology
Runoff - Satellites--Remote Sensing - Snow and Snowfall--Melting - Temperature Measurement--Remote Sensing - Water--Evaporation
Great Salt Lake - Martinec-Range Snowmelt-Runoff Model - Satellite Imagery - Sevier Basin, Utah - Water Surface Temperatures