Relationship between small dam efficiency and gully erodibility of the lithologic formations covering their watershed

Felfoul, Mennoubi Sfar; Snane, Mohamed Habib; Albergel, Jean; Mechergui, M.

doi:10.1007/s10064-003-0190-9

Cited by 13 publications

(2 citation statements)

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“…Two classes were found: one represents the catchment areas with a high runoff coefficient and specific sediment yield, and the other includes the catchment areas with a low runoff coefficient. Felfoul et al (2003) determined a significant linear relationship between a catchment lithologic number and the dam efficiency for fifteen small dams, indicating that an accurate lithological survey during the planning of new reservoirs is necessary to reduce dam siltation. Ayadi et al (2008) made use of PCA and hierarchical clustering for regionalizing erosion vulnerability.…”

Section: Introductionmentioning

confidence: 97%

Evaluation of sedimentation vulnerability at small hillside reservoirs in the semi-arid region of Tunisia using the Self-Organizing Map

et al. 2010

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Section: Introductionmentioning

confidence: 97%

Evaluation of sedimentation vulnerability at small hillside reservoirs in the semi-arid region of Tunisia using the Self-Organizing Map

et al. 2010

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“…The marly formation, widespread in this area, is highly affected by gullying erosion (Vandekerckhove et al 2000, Sfar Felfoul et al 2003, which is generally considered to be one of the most important soil erosion processes world-wide (Valentin et al 2005). In Mediterranean environments, the dominant contribution of gully erosion to total soil loss is often reported (Poesen et al 1996, 2002, Oostwoud Wijdenes et al 2000, De Vente et al 2005.…”

Section: Introductionmentioning

confidence: 99%

Factors and processes of permanent gully evolution in a Mediterranean marly environment (Cape Bon, Tunisia)

Khalili

Raclot

Habaeib

et al. 2013

Hydrological Sciences Journal

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Gully erosion is considered to be one of the most important soil erosion processes in Mediterranean marly environments, but its actual contribution to total soil loss is still under discussion. The objectives of this paper are: (a) to acquire the distributed value of erosion rate in a permanent gully developed on a marly substratum in a Mediterranean environment; and (b) to quantify the key factors responsible for the spatial and temporal differences in erosion rates observed within the gully. A permanent gully located in Cap Bon (northeastern Tunisia) has been intensively and regularly monitored over a 7-year period with electronic survey equipment (total station) to give five field topographic surveys, as well as hydrological measurements at the gully outlet. The net soil loss for the 7-year period comprised a denudation of 51 m 3 of sediment on the gully bank slopes, which corresponds to a mean soil loss of 61 m 3 ha -1 year -1 or 6.1 mm year -1 . Denudation was observed on bed units with a slope gradient greater than 20%, while the remainder showed deposition. By confirming the factors involved in gully evolution, and by refining the statistical link between factors and erosion rates within the gully, the results provide important information to predict gully erosion rates in Mediterranean marly environments.Key words soil erosion; topographic survey; gully monitoring; marl; Mediterranean environment Facteurs et processus impliqués dans l'évolution d'une ravine permanente située dans un environnement marneux méditerranéen (Cap Bon, Tunisie)Résumé Si l'érosion ravinaire est souvent considérée comme un processus prédominant en milieu méditerranéen marneux, sa contribution au flux total de sédiments reste très incertaine. Les objectifs de cet article sont (a) d'acquérir des taux d'érosion spatialisés au sein d'une ravine permanente développée sur un substrat marneux; et (b) de quantifier les facteurs clés expliquant la variabilité spatiale et temporelle des taux d'érosion observés au sein de la ravine. Pour cela, une ravine permanente située au Cap Bon (Nord Est de la Tunisie) a été suivie durant 7 ans à travers cinq campagnes de mesures topographiques intensives réalisées à l'aide d'une station totale et à travers des mesures en continu du débit à l'exutoire de la ravine. Durant ces 7 années d'observations, les flancs de la ravine ont subi une perte nette de sol de 51 m 3 , ce qui correspond à des valeurs d'érosion spécifique annuelle de 61 m 3 ha -1 an -1 ou 6,1 mm an -1 . Les portions du lit de la ravine dont la pente est supérieure à 20% ont subi une ablation, les autres un dépôt. En confirmant les facteurs impliqués dans l'évolution de la ravine et en affinant les relations statistiques liant facteurs et taux d'érosion, cette étude fournit des informations pratiques très utiles pour la prévision des taux d'érosion de ravines situées en contexte méditerranéen marneux.

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Soil and Water Conservation: An Overview

Gachene

Nyawade

Karanja

2019

Encyclopedia of the UN Sustainable Development Goals

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Relationship between small dam efficiency and gully erodibility of the lithologic formations covering their watershed

Cited by 13 publications

References 1 publication

Evaluation of sedimentation vulnerability at small hillside reservoirs in the semi-arid region of Tunisia using the Self-Organizing Map

Evaluation of sedimentation vulnerability at small hillside reservoirs in the semi-arid region of Tunisia using the Self-Organizing Map

Factors and processes of permanent gully evolution in a Mediterranean marly environment (Cape Bon, Tunisia)

Soil and Water Conservation: An Overview

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