Impacts of Land use and Land cover changes on the ecosystem services of the Little Ruaha River Catchment, Tanzania

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dc.contributor.authorChilagane, N. A.
dc.date.accessioned2018-04-11T07:08:01Z
dc.date.available2018-04-11T07:08:01Z
dc.date.issued2017-08-09
dc.descriptionM.SC. Dissertationen_US
dc.description.abstractLand use and land cover changes have become a major challenge on the sustainability of the Little Ruaha River catchment (LRRC). Agriculture expansion by means of slash and burning farming methods and urbanization are mainly responsible for the significant alteration of the important natural biophysical covers such as forests and wetlands in the LRRC. This alteration in turn has influence on various hydrological and ecological processes which likely to impends the sustainability of the catchment productivity. A study was conducted to evaluate the hydrological impacts of land use and land cover changes on the LRRC using the Soil and Water Assessment Tool (SWAT). “Fix-changing” method under changed land use scenario was used to evaluate the impacts of land use dynamics on the hydrological response of LRRC. Comparison between observed and predicted stream flow confirmed that the initial SWAT model run, requires calibration of stream parameters in order to give a more accurate output from the model. The calibration and validation were performed at three-gauge stations (Makalala, Ihimbu and Mawande) using sequential uncertainty fitting (SUFI-2) in the SWAT Calibration Uncertainty Program. The model performance was assessed based on four objective functions. The statistics showed good results for two gauging stations (Makalala and Mawande) with NSE of 0.62 and 0.65 respectively. The study has revealed that there have been notable impacts caused by land use/cover changes in water and sediment yield. The average annual surface runoff increased by 3.53 mm, sediment yields increased by 1.2 t/ha, long-term average annual river flow has increased with the annual values of 7.3mm, while base flow decreased by 2.86 mm. The future prediction scenario indicates that by the year 2040, the average surface runoff, annual river flow and sediment yield are expected to be 154.28 mm, 22.6mm, 11.35 t/ha respectively. The study recommends a proper enforcement of laws and regulations relating to natural resource and suitable land use planning and management in order to ensure sustainability of the catchment.en_US
dc.description.sponsorshipLIFELand Projecten_US
dc.identifier.citationChilagane, N. (2017). Impacts of Land use and Land cover changes on the ecosystem services of the Little Ruaha River Cachment, Tanzania. MSc dissertation, Department of Forest Resources Assessment and Management, Sokoine University of Agriculture.en_US
dc.identifier.urihttps://www.suaire.sua.ac.tz/handle/123456789/2078
dc.language.isoenen_US
dc.publisherSokoine University of Agricultureen_US
dc.subjectLand useen_US
dc.subjectLand coveren_US
dc.subjectEcosystem servicesen_US
dc.subjectLittle Ruaha Riveren_US
dc.titleImpacts of Land use and Land cover changes on the ecosystem services of the Little Ruaha River Catchment, Tanzaniaen_US
dc.typeThesisen_US

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