• Publications
  • Influence
Environmental conditions and human drivers for changes to north Ethiopian mountain landscapes over 145 years.
As quantitative or spatially distributed studies of environmental change over truly long-term periods of more than 100 years are extremely rare, we re-photographed 361 landscapes that appear onExpand
  • 69
  • 7
Desertification? Northern Ethiopia re-photographed after 140 years.
A collection of sepia photographs, taken during Great Britain's military expedition to Abyssinia in 1868, are the oldest landscape photographs from northern Ethiopia, and have been used to compareExpand
  • 129
  • 6
Detailed recording of gully morphology in 3D through image-based modelling
Abstract The ability to understand gully erosion development is closely related to our ability to quantify the morphology of gullies. At present, various technologies are at hand to collect data atExpand
  • 72
  • 6
Gully head retreat rates in the semi-arid highlands of Northern Ethiopia
Due to overgrazing and agricultural intensification, gully erosion severely affects sub-Saharan countries; however, insufficient quantitative studies exist for this part of the world. This paperExpand
  • 94
  • 4
  • PDF
Impact of deforestation on soil fertility, soil carbon and nitrogen stocks : the case of the Gacheb catchment in the White Nile Basin, Ethiopia
Abstract The evergreen forests of southwest Ethiopia are important for soil fertility sustenance and climate change mitigation. However, the increasing human population and expansion of agriculturalExpand
  • 31
  • 4
  • PDF
Factors controlling the morphology and volume (V)–length (L) relations of permanent gullies in the Northern Ethiopian Highlands
Small-scale aerial photographs and high-resolution satellite images, available for Ethiopia since the second half of the twentieth century as for most countries, allow only the length of gullies toExpand
  • 41
  • 4
Transition from forest-based to cereal-based agricultural systems : a review of the drivers of land use change and degradation in Southwest Ethiopia
The southwestern Ethiopian montane forests are one of the most species‐rich ecosystems and are recognised globally as a priority area for the conservation of biodiversity. Particularly, in contrastExpand
  • 37
  • 3
Soil erosion in the Zim Potok watershed, Polimlje river basin, Montenegro.
The negative impact of sediments on the environment and water resources is widely acknowledged with many watercourses in Montenegro and in the South Eastern European Region. To reduce sedimentExpand
  • 9
  • 3
  • PDF
Linking long-term gully and river channel dynamics to environmental change using repeat photography (Northern Ethiopia)
Abstract In the Highlands of Northern Ethiopia gully occurrence is linked to poverty-driven unsustainable use of the land in a vulnerable semi-arid and mountainous environment, where intensiveExpand
  • 101
  • 2