A Proposed Approach of Sediment Sources and Erosion Processes Identifiacation at Large Catchments

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dc.contributor.authorNdomba, Preksedis M.
dc.contributor.authorMtalo, Felix W.
dc.contributor.authorKillingtveit, A.
dc.date.accessioned2016-03-22T13:00:00Z
dc.date.available2016-03-22T13:00:00Z
dc.date.issued2007
dc.description.abstractIn the subject of identifying sediment sources and erosion processes at catchment level researchers have proposed various methods. Most of the techniques have been applied in isolation. A few workers have combined some methods but still they could not ascertain their findings. As a result they recommended more sophisticated methods in order to compare the results. Little however has been done to correlate suspended sediment concentrations using spatial and temporal hydrological variables like rainfall and surface runoff at reasonable time step such as daily time series. In this study selected methods by previous workers are used and compared. The hydrological variables mapping technique has complemented the results of various renowned sediment sources identification techniques. The introduced method gives not only probable sources and processes but also it additionally identifies location based sediment sources using rainfall stations as pointers. The combined results from both methods indicate that either clay soil land plots or agricultural areas are potential sediment source areas. The result is comparable to previous researchers’ findings in the Pangani River basin that mapped the erosion zones using simple empirical and complex physics-based mathematical models. Although, the methods adopted in this study lacked high-resolution data, the authors believe that the methods and modifications applied give a quick, reliable and more insight to future sediment yield modelling efforts at a catchment level. For instance, a distributed watershed sediment yield model would be appropriate based on high spatial and temporal variation of the hydrological variables as reported in this study. Also, the results suggest that Sediment yield model that simulates sheet erosion might be an ideal tool since the major source areas of the transported sediment are topsoils or sheet erosion.en_US
dc.identifier.citationNdomba,P.M., Mtalo, F., and Killingtveit, A., (2007). A Proposed Approach of Sediment Sources and Erosion Processes Identifiacation at Large Catchments .Journal of Urban and environmental Engineeering Vol. 1 Nr 2 (2007) pp 79-86 doi: 10.4090/jee.2007.vln.079086en_US
dc.identifier.doi10.4090/jee.2007.vln.079086
dc.identifier.issn1982-3932
dc.identifier.urihttp://hdl.handle.net/123456789/1221
dc.language.isoenen_US
dc.publisherUniversidade Federal da Paraíba Brasilen_US
dc.subjecterosion processen_US
dc.subjectCorrelationen_US
dc.subjectfingerprinten_US
dc.subjecthydrologic variablesen_US
dc.subjectsediment sourcesen_US
dc.titleA Proposed Approach of Sediment Sources and Erosion Processes Identifiacation at Large Catchmentsen_US
dc.typeJournal Article, Peer Revieweden_US
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