Riparian zone evapotranspiration estimation from diurnal groundwater level fluctuations

Zoltán Gribovszki, Péter Kalicz, J. Szilagyi, Mihály Kucsara

Research output: Contribution to journalArticle

87 Citations (Scopus)

Abstract

Riparian vegetation typically has a great influence on groundwater level and groundwater-sustained stream baseflow. By modifying the well-known method by White [White, W.N., 1932. Method of estimating groundwater supplies based on discharge by plants and evaporation from soil - results of investigation in Escalante Valley, Utah - US Geological Survey. Water Supply Paper 659-A, 1-105] an empirical and hydraulic version of a new technique were developed to calculate evapotranspiration (ET) from groundwater level readings in the riparian zone. The method was tested with hydrometeorological data from the Hidegvíz Valley experimental catchment, located in the Sopron Hills region at the western border of Hungary. ET rates of the proposed method lag behind those of the Penman-Monteith method but otherwise the two estimates compare favorably for the day. At nights, the new technique yields more realistic values than the Penman-Monteith equation. On a daily basis the newly-derived ET rates are typically 50% higher than the ones obtainable with the original White method. Sensitivity analysis showed that the more reliable hydraulic version of our ET estimation technique is most sensitive (i.e., linearly) to the laboratory- and/or slug-test derived values of the saturated hydraulic conductivity and specific yield taken from the riparian zone.

Original languageEnglish
Pages (from-to)6-17
Number of pages12
JournalJournal of Hydrology
Volume349
Issue number1-2
DOIs
Publication statusPublished - Jan 30 2008

Fingerprint

riparian zone
riparian areas
water table
evapotranspiration
groundwater
methodology
slug test
hydraulics
Penman-Monteith equation
valley
riparian vegetation
fluid mechanics
baseflow
valleys
geological survey
sensitivity analysis
method
hydraulic conductivity
evaporation
water supply

Keywords

  • Diurnal groundwater level fluctuations
  • Evapotranspiration
  • Riparian zone

ASJC Scopus subject areas

  • Soil Science
  • Earth-Surface Processes

Cite this

Riparian zone evapotranspiration estimation from diurnal groundwater level fluctuations. / Gribovszki, Zoltán; Kalicz, Péter; Szilagyi, J.; Kucsara, Mihály.

In: Journal of Hydrology, Vol. 349, No. 1-2, 30.01.2008, p. 6-17.

Research output: Contribution to journalArticle

Gribovszki, Zoltán ; Kalicz, Péter ; Szilagyi, J. ; Kucsara, Mihály. / Riparian zone evapotranspiration estimation from diurnal groundwater level fluctuations. In: Journal of Hydrology. 2008 ; Vol. 349, No. 1-2. pp. 6-17.
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