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  • 1
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    Micro-field assessment of soil erosion and surface runoff using mini rainfall simulator in upper River Njoro watershed. (2015)
    Wageningen Academic Publishers | Wageningen, Netherlands
    Details
    Publication Date: 2021-05-19
    Description: The preliminary results of an assessment of land use effect on soil erosion and surface runoff in a severely degraded watershed in Kenya are presented here. Soil erosion and surface runoff was higher in the non-forested lands (deforested, agriculture and grazing lands) than in the forested (indigenous and exotic) lands.
    Description: Onyando JO, Okelo MO, Gichaba CM, Shivoga WA, Miller SN. "Micro-field assessment of soil erosion and surface runoff using mini rainfall simulator in upper River Njoro watershed in Kenya.". In: XX International Grassland Congress: Offered Papers. Wageningen- Netherlands: Wageningen Academic Publishers; 2005.
    Description: Published
    Keywords: Soil erosion ; Runoff ; Rainfall ; Watersheds
    Repository Name: AquaDocs
    Type: Book Section , Not Known
    Format: Poster (1pp.)
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  • 2
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    Effects of land use changes on bird composition along River Njoro: A watershed of Lake Nakuru (2007)
    Details
    Publication Date: 2021-05-19
    Description: The rift valley lakes and their associated watersheds are home for millions of resident and migratory waterfowl. However, they have been recently challenged by land use changes. Lake Nakuru (Kenya) supports diverse biological resources of global, regional and national importance. It is saline and River Njoro is its main source of freshwater. Deforestation, cultivation and urbanization in vital watershed areas have altered the hydrological regime of River Njoro. There is need to preserve and restore aquatic, riparian and terrestrial biological diversity in the watershed to be able to restore and maintain ecological health of Lake Nakuru. The impact of these recent land use changes on birds in the River Njoro Watershed is of concern to conservationists. This study aimed at giving basic information on the status of bird community in the River Njoro watershed. The upper river course was surveyed. The different land uses along the upper river course were assessed and classified according to the quality of the available habitat. A total of seven sampling sites were studied and observations made. Bird species were identified, counted and recorded. The data was compared among the different land use and correlated to the quality of the habitat. The data revealed that species are distributed largely on the basis of microhabitats. Subsequently, sites with higher number of microhabitats recorded higher species composition. Overall, the upper River Njoro Watershed has a high diversity of birds (〉0.90 Simpson indices). Even then, there was a significant difference between sites along the river depending on riparian land use (p〈0.05). Harmonious integration of land uses in the watershed is the underline for high diversity in the watershed.
    Description: Published
    Keywords: Aquatic birds ; Urbanization ; Resource conservation ; Resource management ; Land use ; Aquatic birds ; Urbanization ; Resource conservation ; Resource management ; Migratory species ; Environment management ; Protected resources ; Watersheds ; Lake basins ; Inland waters ; Environmental effects ; Species diversity ; Riparian environments
    Repository Name: AquaDocs
    Type: Proceedings Paper , Non-Refereed
    Format: 87327 bytes
    Format: application/pdf
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  • 3
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    Institutions, Environment and Water Use: the River Njoro Watershed and Lake Nakuru. (2015)
    University of Wyoming, Department of Renewable Resources | Laramie, Wyoming
    Details
    Publication Date: 2021-05-19
    Description: Institutional, environmental, and economic factors are affecting water quality and quantity within the River Njoro, a major tributary to Lake Nakuru. Between 1979 and 1999, the population within the Njoro watershed greatly increased, from 270,912 people to 413,698 spurring large-scale land use change and increased pressure on watershed resources. In 2003, the USAID funded, Sustainable Management of Rural Watersheds Project (SUMAWA) implemented participatory rural appraisals in the Njoro watershed to identify water use and other resource concerns within the area. Local residents identified two main concerns: 1) lower water quality and associated increases in water borne diseases and 2) reduced access to water and lack of improved water supplies related in part to reduced water quantity. Preliminary results suggest that the hydrologic response within the watershed has been altered to favor increased annual runoff with higher intensity and longer dry spells (Baldyga, 2005). Forest conversion to small-scale agriculture reduces canopy cover, thus exposing soils. If rainfall rates exceed infiltration rates, water once intercepted by the forest canopy contributes to flow flashiness and altered flow regimes. In turn, this may affect the recharge timing of Lake Nakuru.
    Description: Published
    Keywords: GIS ; Water quality ; Fishery institutions ; Water use ; Watersheds ; Lake basins ; Environmental impact
    Repository Name: AquaDocs
    Type: Report , Not Known
    Format: 9pp.
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  • 4
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    Impact of land use on water quality in River Njoro Watershed, Kenya. (2015)
    Wageningen Academic Publishers | Wageningen, Netherlands
    Details
    Publication Date: 2021-05-19
    Description: Water resources within the River Njoro (Kenya) watershed have become degraded due to high population growth rate and change in land use upsetting environmental stability. These changes have impacted negatively on the ecological integrity and hydrologic processes in the watershed but little is known about the influence of specific land uses on water quality of the river.
    Description: Shivonga WA, Muchiri M, Kibichi S, Odanga J, Miller SN, Baldyga TJ, Gichaba CM. "Impact of land use on water quality in River Njoro Watershed, Kenya.". In: XX International Grassland Congress: Offered Papers. Wageningen- Netherlands: Wageningen Academic Publishers; 2005.
    Description: Published
    Keywords: Land use ; Water quality ; Riparian zone ; Watersheds ; Runoff
    Repository Name: AquaDocs
    Type: Book Section , Not Known
    Format: [1p.]
    Location Call Number Limitation Availability
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    PAPER (OA)
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