Impacts of land cover change scenarios on storm runoff generation: a basis for management of the Nyando Basin, Kenya

Simple item page
dc.contributor.authorOlang, L. O.
dc.contributor.authorKundu, P.M.
dc.contributor.authorOuma, G.
dc.contributor.authorFurst, J.
dc.date.accessioned2012-10-11T12:14:18Z
dc.date.available2012-10-11T12:14:18Z
dc.date.issued2012
dc.descriptionPublisher version (Wiley Online)Hydrological Processes Volume 25, Issue 1, pages 80–89, 1 January 2011en_US
dc.description.abstractThe effects of conceptual land cover change scenarios on the generation of storm runoffs were evaluated in the Nyando Basin. The spatial scenarios represented alternatives that vary between full deforestation and reforestation. Synthetic storm events of depths 40, 60 and 80mm were formulated according to the rainfall patterns and assumed to have durations corresponding to the runoff times of concentration. The Natural Resource Conservation Service–Curve Number model was used to generate runoff volumes within the sub-catchments, which were subsequently routed downstream to obtain effects in the whole basin. The simulated land cover change impacts were evaluated relative to values obtained from the actual land cover state of the basin in the year 2000. From the results, an agricultural land cover scenario constituting of about 86 per cent of agriculture indicated increased runoff volumes in the entire basin by about 12 per cent. An agricultural-forested land cover scenario with 40 and 51 per cent of forest and agriculture respectively revealed reduced runoff volumes by about 12 per cent. Alternatively, a scenario depicting a largely forested land cover state with about 78 per cent of forests reduced the runoff volumes by about 25 per cent according to the model estimates. Runoff volumes in the basin were also likely to reduce by about 15 per cent if the appropriate land cover scenario for the respective sub-catchments were to be assumed for runoff management purposes. Considering the prevalent data uncertainty, the study effectively highlights the potential hydrological vulnerability of the basin. The results obtained can form a basis for appropriate catchment management of the area.en_US
dc.identifier.citationLand degradation & development (2012)en_US
dc.identifier.urihttp://ir-library.ku.ac.ke/handle/123456789/5608
dc.language.isoenen_US
dc.publisherWiley Online Libraryen_US
dc.subjectland cover changeen_US
dc.subjectconceptual scenarioen_US
dc.subjecthydrological modelen_US
dc.subjectsynthetic stormen_US
dc.subjectrunoff eventen_US
dc.subjectNyando Basinen_US
dc.subjectcatchment managementen_US
dc.subjectKenyaen_US
dc.titleImpacts of land cover change scenarios on storm runoff generation: a basis for management of the Nyando Basin, Kenyaen_US
dc.typeArticleen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Impact of land cover....pdf
Size:
584.46 KB
Format:
Adobe Portable Document Format
Description:
Full Text Article
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
2.68 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
RP-Department of Water and Environmental Engineering