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Maseno University (2017)

Effects of Drought Dynamics On Vegetation Cover and Water Resources in Marigat Sub-County, Baringo County, Kenya

KOSONEI, Rose Chepkorir

Titre : Effects of Drought Dynamics On Vegetation Cover and Water Resources in Marigat Sub-County, Baringo County, Kenya

Auteur : KOSONEI, Rose Chepkorir

Université de soutenance : Maseno University

Grade : MASTER OF SCIENCE TNENVTRONMENTAL SCIENCES 2017

Résumé partiel
Droughtis a natural phenomenon that exists when precipitation is significantly below normal, affecting landresourceproduction systems. In the arid and semi-arid areas, where pastoralism is the main source of livelihood,droughts adversely affect vegetation cover and water resources which are the key resources for pastoralism.The effects posed by every drought episode vary depending on drought intensity and duration. Thus,there is need to a certain drought intensity and duration to enable effective drought preparedness by both the inhabitants and other stakeholders. Studies carried out have put less emphasis on specific dynamicsof drought and their associated impacts. This study examined the effects of dought dynamics on . vegetationcover and water resources in Marigat Sub-County. The Specific objectives of study were to establish drought dynamics between 1980 and 2012 ; to examine the effects of drought intensity and durationon vegetation cover ; and to ecamine the effects of drought intensity and duration on water resources.The study adopted cross sectional descriptive dosiga’riz.ce both quantitative and qualitative data for a period of 33 years was obtained at once The unit of analysis was the households. Proportionate randomsampling was used to select 368 households from a total study population of 9,160 households ThreeFocus Group Discussions (FGDs) were conducted and five Key Informants were selected using purposive sampling. Both primary and secordary data was collected and analyzed. The results were presentedin textual outlines, tables, charts, graphs, percentages and description.The study used Landsat imageswhich was processed using ERDAS IMAGINE Version 2011 and resulting maps were analyzed usingGIS ArcMap Version 10.1 software Hydrological data for 6 years for River Perkerra was analyzed using Pearson’s Product Moment Correlation Coefficient (r) The study established that droughts in MarigatSub-Countyvaried in both intensity and durations The intensity ranged from 0.1 to 57.8 percent below the long term mean while durations ranged from 1 to 5 years. The effects of these droughts on vegetationcover and water resources were intensity and duration dependent

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