An Analytical Solution of Groundwater Evapotranspiration in Arid Riparian Zone: A Case Study for the Tarim River in China
Abstract
Groundwater evapotranspiration (ET) constitutes a major component of the water balance in arid riparian zone. Most of groundwater ET studies depend on numerical models but it is not easy to discuss the controling factors of groundwater ET in riparian zone. A two-dimension conceptal framework was set up to understand the groundwater ET in arid riparian zone. We deduced an analytical solution and its simplification of riparian ET based on a negative exponential relation between groundwater ET and groundwater depth. The groundwaer ET is controlled by soil type (soil hydraulic condontivity and parameter in the negative exponential relation), aquifer thickness, potential ET and river water table. Three soil types (sand, sandy loam and loam) with different soil texture were selected to discuss the riparian ET and it was found that the riaprian ET is similar for different soil type. The framework and analytical solution are applied in Tarim River in China where a river restoration project had been put into practice. The discussions are helpful to design water supply pattern of river restoration.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2012
- Bibcode:
- 2012AGUFM.H53A1514C
- Keywords:
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- 1813 HYDROLOGY / Eco-hydrology;
- 1818 HYDROLOGY / Evapotranspiration;
- 1829 HYDROLOGY / Groundwater hydrology