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Smallholder irrigation to improve food security in the dry season as well as economic and demographic growth within Ethiopia is developing rapidly. However, the long term sustainability of increased irrigated production, together with degradation of soils (and associated water bodies) may be irre...


Schmitter, Petra S.Haileslassie, AmareDessalegn, YigsawChali, A.Tilahun, S.Langan, Simon J.Barron, Jennie[Improving on-farm water management by introducing wetting front detectors to small scale irrigators in Ethiopia]Improving on-farm water management by introducing wetting front detectors to small scale irrigators in Ethiopia

Irrigation systems consist of three interdependent components involving: the irrigation scheme, the on-farm management and the organizations. The irrigation scheme refers to the infrastructure for water acquisition and distribution (water delivery). This study focused on water delivery performanc...


Agide, Z.Haileslassie, AmareSally, HilmyErkossa, TekluSchmitter, Petra S.Langan, Simon J.Hoekstra, Dirk[Analysis of water delivery performance of smallholder irrigation schemes in Ethiopia: Diversity and lessons across schemes, typologies and reaches]Analysis of water delivery performance of smallholder irrigation schemes in Ethiopia: Diversity and lessons across schemes, typologies and reaches

The study was conducted in the Birr watershed at twelve gully heads located close to each other. The survey includes measurements of morphological features, soil properties, water table elevations and catchment characteristics including erosion at each gully head. The analysis showed that gully h...


Addisie, Meseret B.Ayele, Getaneh K.Gessess, A. A.Tilahun, Seifu A.Moges, M. M.Schmitter, Petra S.Steenhuis, Tammo S.[Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed]Hydro-geomorphological features at gully heads in the humid northern Ethiopian Highlands, Birr Watershed

The decrease of pervious areas during urbanization has severely altered the hydrological cycle, diminishing infiltration and therefore sub-surface flows during rainfall events, and further increasing peak discharges in urban drainage infrastructure. Designing appropriate waster sensitive infrastr...


Meshgi, A.Schmitter, Petra S.Chui, T.F.M.Babovic, V.[Development of a modular streamflow model to quantify runoff contributions from different land uses in tropical urban environments using Genetic Programming]Development of a modular streamflow model to quantify runoff contributions from different land uses in tropical urban environments using Genetic Programming

Load estimates are more informative than constituent concentrations alone, as they allow quantification of on- and off-site impacts of environmental processes concerning pollutants, nutrients and sediment, such as soil fertility loss, reservoir sedimentation and irrigation channel siltation. Whil...


Slaets, J.I.F.Piepho, Hans-PeterSchmitter, Petra S.Hilger, T.Cadisch, Georg[Quantifying uncertainty on sediment loads using bootstrap confidence intervals]Quantifying uncertainty on sediment loads using bootstrap confidence intervals

Maintaining indigenous nutrient supply and positive nutrient balances are key factors in sustaining rice yields. Irrigation systems act as conveyers for water, sediments and nutrients throughout landscapes, especially in mountainous, cultivated tropical areas where erosivity is usually high. Cont...


Slaets, J.I.F.Schmitter, Petra S.Hilger, T.Hue, D.T.T.Piepho, Hans-PeterVien, T.D.Cadisch, Georg[Sediment-associated organic carbon and nitrogen inputs from erosion and irrigation to rice fields in a mountainous watershed in Northwest Vietnam]Sediment-associated organic carbon and nitrogen inputs from erosion and irrigation to rice fields in a mountainous watershed in Northwest Vietnam

Composite agricultural systems with permanent maize cultivation in the uplands and irrigated rice in the valleys are very common in mountainous southeast Asia. The soil loss and fertility decline of the upland fields is well documented, but little is known about reallocation of these sediments wi...


Slaets, J.I.F.Schmitter, Petra S.Hilger, T.Vien, T.D.Cadisch, Georg[Sediment trap efficiency of paddy fields at the watershed scale in a mountainous catchment in northwest Vietnam]Sediment trap efficiency of paddy fields at the watershed scale in a mountainous catchment in northwest Vietnam

Purpose - Agricultural intensification to meet the food needs of the rapidly growing population in developing countries affects water quality. In regions such as the Lake Tana basin, knowledge is lacking on measures to reduce non-point source pollutants in humid tropical monsoon climates. The aim...


Moges, M.A.Schmitter, Petra S.Tilahun, Seifu A.Steenhuis, Tammo S.[Watershed modeling for reducing future non-point source sediment and phosphorus load in the Lake Tana Basin, Ethiopia]Watershed modeling for reducing future non-point source sediment and phosphorus load in the Lake Tana Basin, Ethiopia

Planning effective landscape interventions is an important tool to fight against land degradation and requires knowledge on spatial distribution of runoff. The objective of this paper was to test models that predict temporal and spatial distribution of runoff. The selected models were PED-WM, HBV...


Moges, M.A.Schmitter, Petra S.Tilahun, Seifu A.Langan, Simon J.Dagnew, D.C.Akal, Adugnaw T.Steenhuis, Tammo S.[Suitability of watershed models to predict distributed hydrologic response in the Awramba Watershed in Lake Tana Basin]Suitability of watershed models to predict distributed hydrologic response in the Awramba Watershed in Lake Tana Basin

Although Ethiopia has abundant land for irrigation, only a fraction of its potential land is being utilized. This study evaluates suitability of lands for irrigation using groundwater in Ethiopia using GIS-based Multi-Criteria Evaluation (MCE) techniques in order to enhance the country's agricult...


Worqlul, A.W.Jeong, J.Dile, Y.T.Osorio, J.Schmitter, Petra S.Gerik, T.Srinivasan, R.Clark, N.[Assessing potential land suitable for surface irrigation using groundwater in Ethiopia]Assessing potential land suitable for surface irrigation using groundwater in Ethiopia

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