Gestion durable des eaux et des sols au Maroc

Roose, Éric; Sabir, Mohamed; Laouina, Abdellah

doi:10.4000/books.irdeditions.294

Cited by 20 publications

(19 citation statements)

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“…The majority of studies carried out on water erosion in the Tunisian semi-arid field, have highly focused on the State's commitment to this policy concerning the C.E.S. work, largely based on the bulges of banquettes, sometimes without taking into consideration some lithological aspects unfavourable to these works [13] [16] [17] [18]. At the level of the Chaddad wadi watershed, the banquettes have been installed on the average course of the wadi.…”

Section: ) Land Use and Watershed Managementmentioning

confidence: 99%

Modelling the Soil Loss in the Watershed of the Chaddad Wadi in Terms of Both Rockiness and Soil Slaking Indexes

Arif¹

2020

IJG

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Currently we are at a phase where morphogenesis is gaining more prominence and dimension regarding the pedogenesis. The numerous multidisciplinary studies on the soil showed that the erosive action as well as the various problems that result from it, bring out a very serious state of soil degradation in the semi-arid field [1]- [9]. Several attempts have established to set empirical and experimental methods for a quantitative estimation of soil loss caused by diffuse erosion. In this perspective, this research intends to track soil losses in the watershed of the Chaddad wadi, the average-flowing stream of the Nebhana wadi belonging to the lower semi-arid field. The main stream and its tributaries drain an area of 26.5 km 2 from the eastern slopes of Ejhaf mountain (517 m) and Fartout mountain (476 m), as well as the southern slope of Ediour mountain (405 m). The dividing line of the waters with the Khalfallah wadi and Bel Assoued wadi is caused by rows of hills with an altitude ranging between 220 m and 306 m such as the hills of Sidi Salah and those of Es-Souida and Ain Fres. The Wischmeier Equation will be improved by two corrective parameters: the rockiness on the one hand and the soil slaking index on the other, aiming to develop and optimize the potential of this empirical model. This application allowed overcoming some of the limitations that came with the Wischmeier equation, which is primarily designed for an application within different physical conditions on the scale of a land plot. This research is an opportunity to make a detailed contribution to the potential sensitivity of the watershed to water erosion. A good demarcation of the physical anthropogenic framework of the erosive action will provide substantial support in terms of soil protection and the stabilization of watersheds emitting sediments.

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Section: ) Land Use and Watershed Managementmentioning

confidence: 99%

Modelling the Soil Loss in the Watershed of the Chaddad Wadi in Terms of Both Rockiness and Soil Slaking Indexes

Arif¹

2020

IJG

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“…Dans les montagnes du Haut Atlas, les terres cultivables sont rares « 5%) et sont limitées à quelques replats sur les versants, les colluvions de bas de pente (généralement transformées en gradins irrigués) et les alluvions formant les basses terrasses le long des torrents: le reste des versants est soumis au parcours extensif et couvert par quelques forêts dégradées (genévriers, chênes verts, cèdres, pins, thuyas) (Roose et al, 2010).…”

Section: Problématiqueunclassified

“…Les eaux, très claires en saison sèche, prennent la couleur des sédiments arrachés aux versants voisins (marnes rouges) et à certaines époques coulent noires, chargées des terres de parc accumulées par le bétail pâturant sur les montagnes et des rendzines noires couvrant les versants calcaires. Aussitôt que les crues ont cessé, les travaux commencent pour récupérer ces terres caillouteuses mais fertiles et bien irriguées toute l'année (Sabir, 2002 ;Roose et al, 2010).…”

Section: Problématiqueunclassified

Chapitre 40. Restauration des basses terrasses dévastées par les torrents dans le Haut Atlas (Maroc)

Roose¹,

Saad²

2017

Restauration De La Productivité Des Sols Tropicaux Et Méditerranéens

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Les basses terrasses des oueds du Haut Atlas sont dévastées plusieurs fois par siècle par des crues brutales. Pourtant les paysans restaurent les épis et les murs protégeant ces terres alluviales bien irriguées et enrichies par les apports de sédiments. Leurs petits champs sont progressivement colonisés par des herbes fourragères, puis par des pâturages, puis cultivés en céréales et légumineuses et finalement par des arbres fruitiers ou forestiers.

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“…According to the High Commission for Water and Forests and the Fight against Desertification (HCEFLCD) (1996) [3], water erosion affects about 23 million ha of Moroccan land. In addition to the socio-economic damage and flood risks that threaten populations and infrastructure [4], this phenomenon reduces the hydraulic capacity of dams [5]. The north of Morocco, and particularly some regions of the Rif, are highly exposed to water erosion and siltation of water reservoirs because of the climatic aggressiveness, the rugged terrain, the tremendous lithological sensitivity (marl, marl-limestone, etc.…”

Section: Introductionmentioning

confidence: 99%

Pedological characteristics of soils in the watersheds of Oueds Nekôr and Ghiss (Central Rif; Morocco)

et al. 2021

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The objective of this work is the pedological characterization of soils in the watersheds of Oueds Nekôr and Ghiss. Several profiles were identified and sampled for Physico-chemical and sedimentological analyses (color index, magnetic susceptibility, pH, granulometry, water content, organic matter, and carbonates). The watersheds in question are roughly characterized by a soft and diversified lithology, a sparse vegetation cover, and a semi-arid Mediterranean climate. The soils in the Oued Nekôr watershed are of the silty type (> 50%), not very developed and relatively well-drained, and become well-drained stony in the steep and eroded areas. Soil pH varies between 7 and 8, reflecting low alkaline to alkaline soils. In the Oued Ghiss watershed, the sandstone-limestone or marl-schist soils are poorly differentiated in the steep slopes. The well-drained soils are gravelly, relatively alkaline, and show the beginning of rubefaction. Very locally on wooded flats, the soil profiles can become deep and well-differentiated due to colluvial accumulation. The dark brown eluvial A horizon is relatively rich in organic matter (3.6%). The well individualized illuvial B horizon has strongly rubbed concretions and is richer in organic matter (4.6%). The light beige C horizon corresponds to the strongly altered marl and limestone parent rock with low organic matter content (1.3%) and very low magnetic susceptibility values.

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Gestion durable des eaux et des sols au Maroc

Cited by 20 publications

References 0 publications

Modelling the Soil Loss in the Watershed of the Chaddad Wadi in Terms of Both Rockiness and Soil Slaking Indexes

Modelling the Soil Loss in the Watershed of the Chaddad Wadi in Terms of Both Rockiness and Soil Slaking Indexes

Chapitre 40. Restauration des basses terrasses dévastées par les torrents dans le Haut Atlas (Maroc)

Pedological characteristics of soils in the watersheds of Oueds Nekôr and Ghiss (Central Rif; Morocco)

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