Hydrological behaviour and modelling of a volcanic tropical cultivated catchment

Autor: Roger Moussa, Philippe Cattan, Jean-Baptiste Charlier, Marc Voltz
Přispěvatelé: Systèmes de Cultures Bananes, Ananas, et Plantains (Cirad-FLHOR-UPR 26 Systèmes bananes et ananas), Département Productions fruitières et horticoles (FLHOR), Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad), Laboratoire d'étude des Interactions Sol - Agrosystème - Hydrosystème (UMR LISAH), Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro), Laboratoire d'étude des interactions entre sols, agrosystèmes et hydrosystèmes (LISAH), Institut National de la Recherche Agronomique (INRA)
Jazyk: angličtina
Rok vydání: 2008
Předmět:
Zdroj: Hydrological Processes
Hydrological Processes, Wiley, 2008, 22 (22), pp.4355-4370. ⟨10.1002/hyp.7040⟩
ISSN: 0885-6087
1099-1085
DOI: 10.1002/hyp.7040⟩
Popis: email: Jean-Baptiste Charlier (jb.charlier@gmail.com) Correspondence to Jean-Baptiste Charlier, CIRAD, UPR Systèmes bananes et ananas, Capesterre-Belle-Eau, Guadeloupe, F-97130, France.; International audience; The hydrological behaviour of the cultivated Féfé catchment (17.8 ha) on the tropical volcanic island of Guadeloupe was studied to identify flow paths, to quantify water fluxes, and finally, to build a lumped model to simulate discharge and piezometer levels. The approach combined two steps, an experimental step and a modelling step, which covered two time scales, the annual and the storm event scale. The hydrological measurements were conducted over 2 years. The Féfé catchment is characterized by heavy rainfall (4229 mm/year) on permeable Andosols; the results showed that underground flow paths involved two overlapping aquifers, and that the annual water balance in 2003 was shared among outflows of the deep aquifer (42%), evapotranspiration (31%), and streamflow (27%). On the event scale, the surface runoff coefficient ranges between 6.2% and 24.4% depending on antecedent dry or wet moisture conditions. Hortonian overland flow predominated over subsurface and saturation overland flow processes. Recharge of the shallow aquifer is mainly governed by a constant infiltration capacity of the Andosols with depth in the vadose zone. Outflows of this shallow aquifer were the baseflow of the main stream and the recharge of the deep aquifer. Volcanic deposits at Féfé promoted the underground flow path, and cultivated areas seemed to explain the high stormflow values relative to other tropical small catchments under rain forest. A conceptual lumped model integrating runoff, infiltration, evapotranspiration, and fluctuations of the two overlapping aquifers was developed. The model has six parameters and was calibrated and validated on the hydrograph at the outlet and on the two piezometers of the shallow and the deep aquifers. The results show fair to good agreement between measured and simulated variables, and consequently, the model was consistent with the main hydrological processes observed from experimental results in wet conditions.
Databáze: OpenAIRE
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