Estimation of Soil Erosion Using RUSLE in GIS Frame Work: In the Case Study of Wanka Catchment in Estie District, Amhara, Ethiopia
Issue:
Volume 7, Issue 2, June 2022
Pages:
23-32
Received:
10 March 2022
Accepted:
20 April 2022
Published:
28 April 2022
DOI:
10.11648/j.es.20220702.11
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Abstract: Today soil erosion by water is the most critical natural degradation problems that remove surface top soil by depressive action of rainfall intensity followed by runoff. Due to this reason USLE model have been used to estimate total annual soil loss of the catchment. The objective of this study is to estimate the total annual soil loss using USLE in GIS framework in Wanka catchment. The methodology of this study was used to combine the six USLE’s significant physical input factors such as Rainfall erosivity factor, soil erodibility factor, land cover factor, topographic factor and support practices factor to estimate soil loss of the study area. These factor was converted to raster layer format in GIS and multiplied together to estimate soil loss in ton per hectare per year of the study area with raster calculator. Finally the study showed that the estimation of annual soil loss of the catchment have been ranged between 0 to 169.321 ton/ha/year. These result used as threshold for the implementation of effective soil and water conservation measures to minimize soil loss risk in this catchment. In addition to the soil loss result, as seen in filed survey the catchment was prone to land degradation with unwise use of natural resource this should have been require a decision for the management and protection of natural resources.
Abstract: Today soil erosion by water is the most critical natural degradation problems that remove surface top soil by depressive action of rainfall intensity followed by runoff. Due to this reason USLE model have been used to estimate total annual soil loss of the catchment. The objective of this study is to estimate the total annual soil loss using USLE i...
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The Laboratory Investigations of Reducing Iron and Silica Content of Potassium Feldspar Ore by Flotation
Ali Noorbakhsh,
Mohammad Bagher Eslami Andargoli
Issue:
Volume 7, Issue 2, June 2022
Pages:
33-38
Received:
26 February 2022
Accepted:
8 April 2022
Published:
29 April 2022
DOI:
10.11648/j.es.20220702.12
Downloads:
Views:
Abstract: Potassium feldspar is one of the basic needs of glass, ceramic, electrical insulation and other industries. One of the challenging factors in feldspar processing industries is the presence of iron and silica in feldspar. In order to increase the quality of feldspar concentrate for use in related industries, flotation is one of the most common methods of reduce iron and silicon content in feldspar. Therefore, in this study, the ore was crushed for 15 minutes to reduce the particle size below 150 microns. Then the mineralogical and chemical composition of the crushed product were determined by conventional XRF and XRD methods. Based on the mineralogical and chemical composition of the crushed product, different flotation scenarios were designed to reduce the iron and silica content in feldspar were investigated. The amount of silica and iron in the samples used in this study were 73.31 and 0.31%, respectively. In the first stage, in order to reduce iron, reverse flotation experiments were performed. In reverse flotation experiments, using a combination of 800 g/ton of each of the two collectors Aero 801 and 845 with 100 g/ton of pine oil frother at a pH of 2.5-2.9, the iron content to a level of 0.11%, Decreased. Also, to reduce silica content up to 57.26%, 400 g/ton of fluoric acid detector with 200 g/ton methyl isobutyl carbinol (MIBC) frother was obtained at pH 2.8-3. Feldspar with this percentage of impurities is suitable for use in required industries such as ceramic and tile.
Abstract: Potassium feldspar is one of the basic needs of glass, ceramic, electrical insulation and other industries. One of the challenging factors in feldspar processing industries is the presence of iron and silica in feldspar. In order to increase the quality of feldspar concentrate for use in related industries, flotation is one of the most common metho...
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