A three‐stage precipitation partitioning framework is proposed to study the climate controls on mean annual groundwater evapotranspiration (GWET) for 33 gauged watersheds in west‐central Florida. Daily GWET, total evapotranspiration (ET), groundwater recharge, base flow, and total runoff are simulated by the Integrated Hydrologic Model, which dynamically couples a surface water model (HSPF) and a groundwater flow model (MODFLOW). The roles of GWET on long‐term water balance are quantified by four ratios. The ratios of GWET to total available water, watershed wetting, ET, and recharge decrease exponentially with watershed aridity index (WAI), which is defined as the ratio of potential evapotranspiration to total available water. In the one‐stage precipitation partitioning framework, the contribution of GWET to the ratio between total ET and available water for ET (i.e., the
- Award ID(s):
- 1653841
- NSF-PAR ID:
- 10105162
- Date Published:
- Journal Name:
- Journal of hydrology
- Volume:
- 564
- ISSN:
- 0022-1694
- Page Range / eLocation ID:
- 294-306
- Format(s):
- Medium: X
- Sponsoring Org:
- National Science Foundation
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