Evapotranspiration calibration approaches for continuous precipitation-runoff modeling under future climate scenarios
Abstract
Evapotranspiration accounts for 65% of the annual water budget for global land masses and is an important component of the water cycle when considering future climate scenarios. Despite its importance, evapotranspiration is often inadequately modeled in climate change studies and is rarely considered during precipitation-runoff model calibration. In two recent water supply studies in California, evapotranspiration methods were evaluated for adequacy under changing climate regimes, and data from In situ and remotely sensed sources were used as evapotranspiration calibration targets. In both studies the Hydrologic Engineering Center's Hydrologic Modeling System (HEC-HMS) provided a hydrologic modeling framework. The Priestley-Taylor and Penmen-Monteith evapotranspiration implementations in HEC-HMS were calibrated to In situ data from The California Irrigation Management Information System (CIMIS) and the remotely sensed Moderate Resolution Imaging Spectroradiometer (MODIS) evapotranspiration product. This evapotranspiration calibration approach yielded higher confidence in the hydrologic model when considering water supply under future climate scenarios.
- Publication:
-
AGU Fall Meeting Abstracts
- Pub Date:
- December 2019
- Bibcode:
- 2019AGUFM.H13S2035B
- Keywords:
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- 1630 Impacts of global change;
- GLOBAL CHANGE;
- 1812 Drought;
- HYDROLOGY;
- 1821 Floods;
- HYDROLOGY;
- 1880 Water management;
- HYDROLOGY