Catchment-level evaluation of farmers' estimates of soil erosion and crop yield in the Central Highlands of Kenya

2010 ◽  
Vol 21 (4) ◽  
pp. 388-400 ◽  
Author(s):  
B.O. Okoba ◽  
G. Sterk
Keyword(s):  
Soil Erosion ◽  
Crop Yield ◽  
Central Highlands

scholarly journals Hydrological Modeling in an Ungauged Basin of Central Vietnam Using SWAT Model

2016 ◽  
Author(s):  
Ammar Rafiei Emam ◽  
Martin Kappas ◽  
Linh Hoang Khanh Nguyen ◽  
Tsolmon Renchin
Keyword(s):  
Soil Erosion ◽  
Natural Hazards ◽  
Crop Yield ◽  
Surface Runoff ◽  
River Discharge ◽  
Hydrological Modeling ◽  
Assessment Tools ◽  
Actual Evapotranspiration ◽  
Ungauged Basin ◽  
Central Vietnam

Abstract. Hydrological modeling of ungauged basins which have a high risk of natural hazards (e.g., flooding, droughts) is always imperative for policymakers and stakeholders. The Aluoi district in Hue province is a representative case study in Central Vietnam, as it is under extreme pressure of natural and anthropogenic factors. Flooding, soil erosion and sedimentation are the main hazards in this area, which threaten socio-economic activities not only in this district but also those of the area downstream. To evaluate the water resources and risk of natural hazards, we used Soil and Water Assessment Tools (SWAT) to set up a hydrological model in the ungauged basin of Aluoi district. A regionalization approach was used to predict the river discharge at the outlet of the basin. The model was calibrated in three time scales: daily, monthly and yearly by river discharge, actual evapotranspiration (ETa) and crop yield, respectively. The model was calibrated with Nash-Sutcliff and an R2 coefficients greater than 0.7, in daily and monthly scales, respectively. In the yearly scale, the crop yield inside the model was calibrated and validated with RMSE less than 2.4 ton/ha, which showed the high performance of the model. The water resource components were mapped temporally and spatially. The outcomes showed that the highest mean monthly surface runoff, 700 to 765 mm, between September and November, resulted in extreme soil erosion and sedimentation. The monthly average of actual evapotranspiration was the highest in May and lowest in December. Furthermore, installing "Best Management Practice" (BMPs) reduced surface runoff and soil erosion in agricultural lands. However, using event-based hydrological and hydraulically models in the prediction and simulation of flooding events is recommended in further studies.

Effectiveness OF Mulching Under Miraba in Controlling Soil Erosion, Fertility Restoration and Crop Yield in the Usambara Mountains, Tanzania

2015 ◽  
Vol 27 (4) ◽  
pp. 1266-1275 ◽  
Author(s):  
Sibaway Bakari Mwango ◽  
Balthazar Michael Msanya ◽  
Peter W. Mtakwa ◽  
Didas N. Kimaro ◽  
Jozef Deckers ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Crop Yield ◽  
Fertility Restoration

scholarly journals Developing GIS-Based Soil Erosion Map Using RUSLE of Andit Tid Watershed, Central Highlands of Ethiopia

2018 ◽  
Vol 19 (1) ◽  
pp. 1-13 ◽  
Author(s):  
Ayele Desalegn ◽  
Abraham Tezera ◽  
Fikrey Tesfay
Keyword(s):  
Soil Erosion ◽  
Central Highlands

EFFECT OF SOIL BUNDS ON RUNOFF, SOIL AND NUTRIENT LOSSES, AND CROP YIELD IN THE CENTRAL HIGHLANDS OF ETHIOPIA

2012 ◽  
Vol 25 (6) ◽  
pp. 554-564 ◽  
Author(s):  
Z. Adimassu ◽  
K. Mekonnen ◽  
C. Yirga ◽  
A. Kessler
Keyword(s):  
Crop Yield ◽  
Nutrient Losses ◽  
Central Highlands

scholarly journals The 'Landcare' approach to soil conservation in the Philippines: an assessment of farm-level impacts

2007 ◽  
Vol 47 (6) ◽  
pp. 721 ◽  
Author(s):  
R. A. Cramb ◽  
D. Catacutan ◽  
Z. Culasero-Arellano ◽  
K. Mariano
Keyword(s):  
Soil Erosion ◽  
Crop Yield ◽  
Soil Conservation ◽  
The Philippines ◽  
Conservation Practices ◽  
Short Term ◽  
Farm Level ◽  
Conservation Farming ◽  
The Impact

‘Landcare’ is a group-based approach to the promotion of conservation farming. A case study of the Landcare program in Lantapan in the southern Philippines is presented to assess the farm-level impacts of this approach. The program was successful in promoting the formation of Landcare groups and a municipal Landcare association, resulting in rapid and widespread adoption of conservation practices, particularly among maize farmers. This in turn significantly reduced soil erosion, though the impact on crop yield and income was somewhat delayed. Adoption was thus not motivated primarily by short-term returns but by a concern to reduce soil erosion and provide a basis for diversification into agroforestry.

scholarly journals Assessing the impacts of different land uses and soil and water conservation interventions on runoff and sediment yield at different scales in the central highlands of Ethiopia

2020 ◽  
pp. 1-15 ◽  
Author(s):  
Tesfaye Yaekob ◽  
Lulseged Tamene ◽  
Solomon G. Gebrehiwot ◽  
Solomon S. Demissie ◽  
Zenebe Adimassu ◽  
...  
Keyword(s):  
Soil Erosion ◽  
Sediment Yield ◽  
Water Conservation ◽  
Moisture Stress ◽  
Quantitative Information ◽  
Soil And Water Conservation ◽  
Land Uses ◽  
Central Highlands ◽  
The Government ◽  
Soil And Water

Abstract To tackle the problem of soil erosion and moisture stress, the government of Ethiopia introduced a yearly mass campaign where communities get together and implement various soil and water conservation (SWC) and water harvesting (WH) practices. Although the interventions are believed to have reduced soil erosion/sediment yield and enhanced surface and ground water, quantitative information on the impacts of various options at different scales is scarce. The objective of this study was to assess the impacts different land uses, SWC and WH interventions on water and suspended sediment yield (SSY) at plot and watershed scales in the central highlands of Ethiopia. Standard erosion plot experiments and hydrological stations were used to monitor the daily water and SSY during 2014 to 2017. The results show differences between treatments both at plot and watershed scales. Runoff and soil loss were reduced by an average 27 and 37%, respectively due to SWC practices at the plot level. Overall, SWC practices implemented at the watershed level reduced sediment yield by about 74% (in the year 2014), although the magnitude of sediment reduction due to the SWC interventions reduced over time. At both scales it was observed that as the number of years since SWC measures have been in place increased, their effectiveness declined due to the lack of maintenance. This study also revealed that extrapolating of plot data to watershed scale causes over or under estimation of net erosion.

Effects of double drilling of small grains on soil erosion by concentrated flow and crop yield

2007 ◽  
Vol 93 (2) ◽  
pp. 379-390 ◽  
Author(s):  
G. Gyssels ◽  
J. Poesen ◽  
A. Knapen ◽  
W. Van Dessel ◽  
J. Léonard
Keyword(s):  
Soil Erosion ◽  
Crop Yield ◽  
Concentrated Flow ◽  
Small Grains
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