Paleoenvironmental changes during the last 4000 yr in the Tigray, NorthernEthiopia
C 14 dating ; Ethiopia ; Geochronology ; Holocene ; Land use ; Palaeo-environment ; Palaeoclimate ; Stratigraphy ; Thermoluminescence
In this study, a high-resolution sequence of the main degradational and stability phases during the past 4000 yr in NorthernEthiopia, and in the Ethiopian Highlands in general, is presented. The paleoenvironmental reconstruction involved the use
Reservoir siltation in the semi-arid highlands of northernEthiopia : sediment yield-catchment area relationship and a semi-quantitative approach for predicting sediment yield
Reservoir surveys were conducted to estimate sediment deposition rate for 11 reservoirs identified to be representative of catchments in the Tigray region of northernEthiopia. Field surveys were conducted to characterize the catchments in terms
of erosional susceptibility based on factorial scoring approach. Finally, the factorial index was integrated with the catchment area to develop a semi-quantitative sediment yield potential prediction model for the highlands of northernEthiopia.
In this study, reservoir sedimentation and corresponding catchment attribute data were used to investigate the major factors controlling sediment yield variability in a mountainous dryland region of northernEthiopia. Sediment yield data were
Spatial distribution of rock fragments in cultivated soils in northernEthiopia as affected by lateral and vertical displacement processes
Agricultural practice ; Arid area ; Cultivated land ; Desertification ; Ethiopia ; Rill wash ; Semi-arid area ; Slope gradient ; Soil ; Spatial distribution
of rock fragment cover along catenas, and the vertical variations in volumetric rock fragment content in soil profiles in the highlands of Tigray, northernEthiopia. Natural and anthropogenic processes inducing these patterns are assessed.
seeds in the bare inter-plant areas; and that seeds in the latter are more likely to be translocated by runoff to microsites under shrubs than to other open areas. The study area is located in the Geba river catchment, central Tigray, northernEthiopia.
The aim of this study was to analyze the impact of exclosures on soil fertility restoration and examine its variability across age, agro-ecology and landscape position. The study was conducted in the Gubalafto district of North Wello Zone, northern
requires that empirical relations between gully volume (V) and length (L) are established in the field. In this study, V–L relations were established for permanent gullies in northernEthiopia. In order to take the regional variability in environmental
Small-scale aerial photographs and high-resolution satellite images, available for Ethiopia since the second half of the twentieth century, allow only the length of gullies to be determined. Understanding the development of gully volumes therefore
Arid area ; Clay mineral ; Ethiopia ; Seasonal variation ; Soil ; Soil properties ; Soil water ; Vertisol
This paper presents the case of a natural rock fragment (RF) mulch whose lithology indicates that the RF are up-squeezed by the local vertisol. Based on the data from the experimental site located in the pass of Enda Maryam, Tigray, Northern
Ethiopia, for the period 01/1999-05/2003, this study aims to provide a better understanding of the process of up-squeezing and underground structures and soil displacements.
A participatory soil quality assessment in NorthernEthiopia's Mai-Negus catchment
Agricultural land use ; Environmental management ; Erosion control ; Ethiopia ; Indicator ; Local knowledge ; Participation ; Soil erosion ; Soil properties ; Sustainable development ; Watershed
This paper presents experiences of local communities in diagnosis of soil quality (SQ) and assesses the contribution of local knowledge as a strategy for sustainable development decision making within the Mai-Negus catchment of northernEthiopia
Assessment of gully erosion rates through interviews and measurements : a case study from northernEthiopia
Cultivated land ; Environmental management ; Erosion rate ; Ethiopia ; Gully erosion ; Land use ; Methodology ; Soil erosion ; Watershed
developed. It comprises measurements of contemporary gully volumes, monitoring of gully evolution over several years and semi-structured interview techniques. Gully erosion rates in the Dogu'a Tembien District, Tigray, Ethiopia, were estimated in 3
Spatial and temporal variability of river flows in the degraded semi-arid tropical mountains of northernEthiopia
Discharge ; Ethiopia ; Flash flood ; Mountain ; Semi-arid area ; Space time ; Spatial variation ; Stream ; Stream flow ; Water resources
This study assesses the runoff from 10 medium-sized catchments in the Geba river basin, a subcatchment of the Nile in the semi-arid degraded northern Ethiopian highlands. Flow depth records were automatically obtained every 10 minutes during