Evaluation of a distributed catchment scale water balance model

Peter A Troch, M. Mancini, C. Paniconi, E. F. Wood

Research output: Chapter in Book/Report/Conference proceedingChapter

51 Citations (Scopus)

Abstract

The conceptual model relies on a topographic index to predict saturation excess runoff and on Philip's infiltration equation to predict infiltration excess runoff. The numerical model solves the three-dimensional Richards equation describing flow in variably saturated porous media, and handles seepage face boundaries, infiltration excess and saturation excess runoff production, and soil driven and atmosphere driven surface fluxes. It is found that water table dynamics as predicted by the conceptual model are close to the observations in a shallow water well and therefore, that a linear relationship between a topographic index and the local water table depth is found to be a reasonable asumption for catchment scale modeling. However, the hydraulic equilibrium assumption is not valid for the upper 100 cm layer of the unsaturated zone and a conceptual model that incorporates a root zone is suggested. Furthermore, theoretical subsurface flow characteristics from the conceptual model are found to be different from field observations, numerical simulation results, and theoretical baseflow recession characteristics based on Boussinesq's groundwater equation. -from Authors

Original languageEnglish (US)
Title of host publicationWater Resources Research
Pages1805-1817
Number of pages13
Volume29
Edition6
StatePublished - 1993
Externally publishedYes

Fingerprint

water budget
catchment
infiltration
runoff
water table
saturation
Richards equation
surface flux
subsurface flow
baseflow
vadose zone
seepage
rhizosphere
porous medium
shallow water
hydraulics
groundwater
evaluation
atmosphere
modeling

ASJC Scopus subject areas

  • Environmental Science(all)
  • Earth and Planetary Sciences(all)

Cite this

Troch, P. A., Mancini, M., Paniconi, C., & Wood, E. F. (1993). Evaluation of a distributed catchment scale water balance model. In Water Resources Research (6 ed., Vol. 29, pp. 1805-1817)

Evaluation of a distributed catchment scale water balance model. / Troch, Peter A; Mancini, M.; Paniconi, C.; Wood, E. F.

Water Resources Research. Vol. 29 6. ed. 1993. p. 1805-1817.

Research output: Chapter in Book/Report/Conference proceedingChapter

Troch, PA, Mancini, M, Paniconi, C & Wood, EF 1993, Evaluation of a distributed catchment scale water balance model. in Water Resources Research. 6 edn, vol. 29, pp. 1805-1817.
Troch PA, Mancini M, Paniconi C, Wood EF. Evaluation of a distributed catchment scale water balance model. In Water Resources Research. 6 ed. Vol. 29. 1993. p. 1805-1817
Troch, Peter A ; Mancini, M. ; Paniconi, C. ; Wood, E. F. / Evaluation of a distributed catchment scale water balance model. Water Resources Research. Vol. 29 6. ed. 1993. pp. 1805-1817
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