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| Titel |
A conceptual model of daily water balance following partial clearing from forest to pasture |
| VerfasserIn |
M. A. Bari, K. R. J. Smettem |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
1027-5606
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| Digitales Dokument |
URL |
| Erschienen |
In: Hydrology and Earth System Sciences ; 10, no. 3 ; Nr. 10, no. 3 (2006-05-10), S.321-337 |
| Datensatznummer |
250008058
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| Publikation (Nr.) |
 copernicus.org/hess-10-321-2006.pdf |
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| Zusammenfassung |
| A simple conceptual water balance model representing the streamflow
generation processes on a daily time step following land use change is
presented. The model consists of five stores: (i) Dry, Wet and Subsurface
Stores for vertical and lateral water flow, (ii) a transient Stream zone
Store (iii) a saturated Goundwater Store. The soil moisture balance in the
top soil Dry and Wet Stores are the most important components of the model
and characterize the dynamically varying saturated areas responsible for
surface runoff, interflow and deep percolation. The Subsurface Store
describes the unsaturated soil moisture balance, extraction of percolated
water by vegetation and groundwater recharge. The Groundwater Store controls
the baseflow to stream (if any) and the groundwater contribution to the
stream zone saturated areas. The daily model was developed following a
downward approach by analysing data from Ernies (control) and Lemon (53% cleared)
catchments in Western Australia and elaborating a monthly model. The daily
model performed very well in simulating daily flow generation processes for
both catchments. Most of the model parameters were incorporated a priori from
catchment attributes such as surface slope, soil depth, porosity, stream
length and initial groundwater depth, and some were calibrated by matching
the observed and predicted hydrographs. The predicted groundwater depth, and
streamflow volumes across all time steps from daily to monthly to annual
were in close agreement with observations for both catchments. |
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