Channel and reservoir sedimentation, Ha Tsiu catchment, Maseru in Sediment sources, sediment residence time and sediment transfer-Case studies of soil erosion in the Lesotho lowlands.
Bassin-versant ; Erosion des sols ; Géographie de l'Afrique ; Géomorphodynamique ; Lesotho ; Maseru ; Sédimentation
Rates of channel sedimentation| rates of reservoir siltation| influence of vegetation, soil, land use and slope on the rates of sediment processes.
Soil erosion in different Lesotho environments-Rate and sediment sources in Sediment sources, sediment residence time and sediment transfer-Case studies of soil erosion in the Lesotho lowlands.
Inventory of sediment sources and possible storage areas and study of reservoir sediments, in three catchments in the lowland area of western Lesotho.
A soil erosion map of the Lesotho lowlands. A case study using visual interpretation of multitemporal Landsat false colour composites in Sediment sources, sediment residence time and sediment transfer-Case studies of soil erosion in the Lesotho
The project is made within the framework of a larger research programme on the relations between sediment production, sediment residence time and sediment delivery in different climates and geomorphological environments.
Sediment transport under different types of vegetation in Sediment sources, sediment residence time and sediment transfer-Case studies of soil erosion in the Lesotho lowlands.
The standard conditions of erosion rates (on albaqualps respective argiudolls soils) is considered to be described by two areas with undisturbed grass cover. Measured sediment concentration in runoff from these were compared with two study areas
The geomorphological mapping of the Mejametalana catchment, Maseru in Sediment sources, sediment residence time and sediment transfer-Case studies of soil erosion in the Lesotho lowlands.
Sediment transfer within a geomorphic system in a foothill region of Lesotho in Sediment sources, sediment residence time and sediment transfer-Case studies of soil erosion in the Lesotho lowlands.
Sediment sources, sediment transfer in a small Lesotho catchment. A pilot study of the spatial distribution of erosion features and their variation with time and climate
Bassin-versant ; Erosion ; Erosion des sols ; Géographie de l'Afrique ; Géomorphodynamique ; Lesotho ; Montagne ; Photo-interprétation ; Photographie aérienne ; Ravinement ; Sédiment ; Transport sédimentaire ; Zone subtropicale
Erosional processes, land use, landforms and soils, Khubetsoana area, Maseru in Sediment sources, sediment residence time and sediment transfer-Case studies of soil erosion in the Lesotho lowlands.
Soil erosion in the Maphutseng and Ha Thabo soil conservation areas in Sediment sources, sediment residence time and sediment transfer-Case studies of soil erosion in the Lesotho lowlands.
The rate of soil erosion in the Wuras Dam catchment calculated from sediments trapped in the dam
Afrique du Sud ; Aménagement hydraulique ; Erosion des sols ; Géographie de l'Afrique ; Lac de barrage ; Orange Free State ; Sol ; Sédimentologie ; Taux de sédimentation ; Wuras
La sédimentation dans le lac de barrage du Wuras a été calculée en déterminant par de nombreuses mesures de profondeurs l'actuelle capacité de stockage qui a été ensuite soustraite de la capacité initiale. 12% des sédiments étant perdus par
débordement, le taux de sédimentation est de 2,3 cm/1000 ans.
Etude de la sédimentation dans les petites dépressions en domaine semi-aride. L'exemple analysé est celui du lac Magui (Mali). Présentation du lac (topographie, bilan hydrologique), du transport des sédiments, des profils longitudinaux et
transversaux des rivières (Kolombiné, Dérékolé) et du taux de sédimentation dans la dépression du lac Magui.
Modern sediments and sedimentary processes in Lake Rudolf (Lake Turkana) eastern Rift Valley, Kenya
Accumulation lacustre ; Afrique de l'Est ; Argile minéral ; Géographie de l'Afrique ; Kenya ; Lac ; Rift ; Rift Valley ; Sédimentologie ; Taux de sédimentation ; Turkana, lac
Données sédimentologiques stratigraphiques, minéralogiques, géochimiques sur les sédiments tertiaires du lac Turkana (rift est-africain) destinées à établir une base d'interprétation des paléoenvironnements lacustres du rift. Les taux de
sédimentation sont élevés (1m/1000ans) et la prépondérance de la sédimentation détritique différencie le lac Turkana des autres lacs du rift africain.
Sedimenteienskappe en benuttingspotensiaal : die Daspoortrand, Pretoria Sediment properties and utilisation potential : the Daspoort pediment, Pretoria
An examination of the physical and chemical properties of the sediments of an area near Pretoria, with a view to the planning of the area. - (AJC)
Sediment budgeting : a case study in the Katiorin drainage basin, Kenya
The primary objective of the present study is to compute a detailed sediment budget for a semiarid tropical drainage basin. This requires the recognition and quantification of the dominant process operating within the basin, and the identification
Sediment yield in South Africa. A preliminary geographical analysis in Soil erosion and host materials in Africa.
This study attempts to quantify the spatial relationships between sediment yield and a range of 15 independent environmental variables in South Africa, using Rooseboom's (1978) data base.
Afrique du Sud ; Climat ; Erosion marine ; Géographie de l'Afrique ; Géomorphodynamique ; Littoral ; Marée ; Niveau marin ; Quaternaire marin ; Sédimentation littorale ; Tectonique ; Transport sédimentaire
The littoral zone is one of the most complex geomorphic systems subject to many geomorphological factors, including waves, sediment supply, climate sea levels and tectonics.
Sédiments et foraminifères actuels de la marge continentale atlantique du Maroc.
L'A. définit des aires de production de sédiments en substrats durs fournissant du matériel biogène, les éléments terrigènes provenant essentiellement du continent. Quatre aires d'accumulation de sédiments peuvent être distinguées : la région
rebord continental et la pente, aires d'accumulation de matériel biogène planctonique (vase à Foraminifères). La thèse donne ensuite différents modèles de sédimentation de marge continentale, avec faibles influences continentales (Agadir), avec fort