Impact of land-use changes and sedimentation on the Muhammad Nur Reservoir, South Kalimantan, Indonesia |
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Authors: | Haji Moehansyah Basant L. Maheshwari Jim Armstrong |
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Affiliation: | (1) School of Environment and Agriculture, University of Western Sydney, Locked bag 1797, 1797 Penrith South DC, NSW, Australia;(2) NSW Dept Land & Water Conservation, PO Box 390, 2580 Goulburn, NSW, Australia |
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Abstract: | The Muhammad Nur Reservoir (MNR) is a major multipurpose reservoir located on the Riam Kanan River in the Indonesian Province of South Kalimantan. The MNR has a high sediment trap efficiency and there is concern that accelerated erosion in the catchment, resulting from inappropriate land use, poses a significant threat to the storage capacity and effective life span of the reservoir. Furthermore, on-going deforestation of large parts of the catchment may have changed the inflow pattern to the reservoir. This paper uses data from fieldwork and published information from different sources to examine the extent of erosion and sedimentation in the catchment and the sediment delivery to the reservoir. Water level variations in the reservoir over a 22-year period are examined for changes that might indicate an alteration of the hydrologic balance in the catchment. |
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Keywords: | Indonesia land degradation land-use changes reservoir capacity soil erosion sediment delivery sedimentation water level fluctuation |
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