scholarly journals Mapping the Gap of Water and Erosion Control Measures in the Rapidly Urbanizing Mbezi River Catchment of Dar es Salaam

Water ◽  
2018 ◽  
Vol 10 (1) ◽  
pp. 64 ◽  
Author(s):  
Mhina Justin ◽  
Jensen Bergen ◽  
Mbuligwe Emmanuel ◽  
Kassenga Roderick
Keyword(s):  
Erosion Control ◽  
Dar Es Salaam ◽  
Control Measures ◽  
River Catchment

scholarly journals Performance Assessment of Erosion Remediation Measures and Proposal of The Best Management Practices for Erosion Control in Sebeya Catchment, Rwanda

2020 ◽  
Vol 3 (2) ◽  
Author(s):  
Félicien Majoro ◽  
Umaru Garba Wali ◽  
Omar Munyaneza ◽  
François-Xavier Naramabuye ◽  
Concilie Mukamwambali
Keyword(s):  
Soil Erosion ◽  
Best Management Practices ◽  
Management Practices ◽  
Soil Depth ◽  
Erosion Control ◽  
Control Measures ◽  
Tree Planting ◽  
Best Management ◽  
Remediation Measures ◽  
Soil Erosion Control

Soil erosion is an environmental concern that affects agriculture, wildlife and water bodies. Soil erosion can be avoided by maintaining a protective cover on the soil to create a barrier to the erosive agent or by modifying the landscape to control runoff amounts and rates. This research is focused on Sebeya catchment located in the Western Province of Rwanda. Sebeya catchment is one of the most affected areas by soil erosion hazards causing loss of crops due to the destruction of agricultural plots or riverbanks, river sedimentation and damages to the existing water treatment and hydropower plants in the downstream part of the river. The aims of this research were to assess the performance of erosion remediation measures and to propose the Best Management Practices (BMPs) for erosion control in Sebeya catchment. Using literature review, site visits, questionnaire and interviews, various erosion control measures were analyzed in terms of performance and suitability. Land slope and soil depth maps were generated using ArcGIS software. The interview results indicated that among the 22 existing soil erosion control measures, about 4.57% of farmers confirmed their existence while 95.43% expressed the need of their implementation in Sebeya catchment. Furthermore, economic constraints were found to be the main limitative factors against the implementation of soil erosion control measures in Sebeya catchment. Also, the majority of farmers suggest trainings and mobilization of a specialized technical team to assist them in implementing soil conservation measures and to generalize the application of fertilizers in the whole catchment. Finally, soil erosion control measures including agro-forestry, terraces, mulching, tree planting, contour bunds, vegetative measures for slopes and buffer zones, check dams, riverbanks stabilization were proposed and recommended to be implemented in Sebeya catchment. Keywords: Erosion control measures, Sebeya catchment, Rwanda

Can Warmwater Streams Be Rehabilitated Using Watershed-Scale Standard Erosion Control Measures Alone?

2007 ◽  
Vol 40 (1) ◽  
pp. 62-79 ◽  
Author(s):  
F. Douglas Shields ◽  
Scott S. Knight ◽  
Charles M. Cooper
Keyword(s):  
Erosion Control ◽  
Control Measures ◽  
Watershed Scale

scholarly journals Soil erosion control measures on degraded sloping lands: A case study in Midlands of Nepal

2005 ◽  
Vol 8 (3) ◽  
pp. 243-249 ◽  
Author(s):  
Daisuke Higaki ◽  
Kishor Kumar Karki ◽  
Chandra Sekhar Gautam
Keyword(s):  
Soil Erosion ◽  
Erosion Control ◽  
Control Measures ◽  
Sloping Lands ◽  
Soil Erosion Control

scholarly journals Erosion modelling towards, and sediment transport modelling in unnavigable watercourses in Flanders, Belgium

2015 ◽  
Vol 367 ◽  
pp. 349-356
Author(s):  
B. Ferket ◽  
M. Van De Broek ◽  
T. Van Hoestenberghe ◽  
J. Degerickx ◽  
R. De Sutter ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Erosion Control ◽  
Control Measures ◽  
River Engineering ◽  
Transport Models ◽  
Transport Modelling ◽  
Sediment Loads ◽  
Erosion Modelling ◽  
Sediment Transport Modelling ◽  
Sediment Export

Abstract. Antea Group and KULeuven were awarded a project in Flanders to identify the regions exporting high sediment loads to unnavigable watercourses and the sedimentation zones within them. Two types of models are applied: hydrological sediment export models (SEM) and hydraulic sediment transport models (STM). The influence of erosion control measures on sediment export as well as river engineering measures needs to be taken into account. A concept will be developed to connect the SEM and STM, enabling the sediment to be routed from upstream to the sedimentation zones. Results of the study will be used by the Flemish government to plan erosion control measures, estimate future sedimentation volumes, steer sedimentation and optimize river engineering and dredging works. Finally, model results could also be used to obtain better insights to the re-suspension risks of contaminated sediment in watercourses.

scholarly journals Survey of efficiency of erosion and flood control measures at the Němčický stream

2008 ◽  
Vol 2 (No. 3) ◽  
pp. 85-95 ◽  
Author(s):  
J. Uhlířová
Keyword(s):  
Flood Control ◽  
Water Retention ◽  
Arable Land ◽  
Erosion Control ◽  
Control Measures ◽  
Protective Measures ◽  
Water Quality Indicators ◽  
Long Term Observation ◽  
Experimental Basin

The article presents the initial part of the research of the efficiency of erosion and flood control measures designed in the experimental basin of the Němčický stream. A long term observation of discharges, rainfalls, and some water quality indicators was introduced at 2 experimental profiles. We have elaborated a study of the erosion threat for discovered areas, where the realisation of protective measures is necessary to reduce soil loss. Besides the erosion control, the sheet grassing contributes to a better water retention by the agricultural countryside. The efficiency of the designed measures ascertained by model evaluation proved that grassing of 49 ha of arable land (from total 183 ha) and the exclusion of erosive dangerous crops growing (on 21 ha) should decrease the centenary discharge by 18% and the amount of the transported suspended matter by 29%. The observation will continue after realisation of the erosion control measures and of a polder, which was designed for sufficiently effective flood protection, and the measurements will be compared with the preliminary and model values.

Notes on Culicine Mosquitos in Tanganyika Territory

1942 ◽  
Vol 33 (3) ◽  
pp. 181-193 ◽  
Author(s):  
W. Victor Harris
Keyword(s):  
Aedes Aegypti ◽  
Dar Es Salaam ◽  
Fixed Number ◽  
Egg Laying ◽  
Control Measures ◽  
Actual Process ◽  
Rural Districts ◽  
Tree Holes ◽  
Constant Period ◽  
Domestic Breeding

The examination of mosquito larvae collected by house searchers on Stegomyia control measures in Dar-es-Salaam, the largest town in Tanganyika, shows that Aëdes aegypti is definitely the predominant domestic breeder there. The other species of the genus Aëdes encountered are listed with their frequencies.Similarly the examination of larvae found in tree-holes in Dar-es-Salaam shows that Aëdes aegypti, A. simpsoni and A. metallicus are regularly encountered.A system of obtaining an index of the population density of both A. aegypti and A. simpsoni, unconnected with the actual process of Stegomyia control measures, is described. This would be applicable to smaller towns, rural districts, and towns in high rainfall areas where A. aegypti is not the only danger as a yellow fever vector, and where extra-domestic breeding is important. The system is based on the exposure of a fixed number of bamboo pots containing water for a constant period of days, to attract egg-laying female mosquitos. Species of mosquitos and their frequencies obtained in a series of trials are given.

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