University of Khartoum

Assessment and GIS Mapping of Wind Erodibility of soils from the Red Sea State, Sudan

Assessment and GIS Mapping of Wind Erodibility of soils from the Red Sea State, Sudan

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Title: Assessment and GIS Mapping of Wind Erodibility of soils from the Red Sea State, Sudan
Author: Ahmed Eisa, Moutasim
Abstract: Wind erodibility of soils (WE) is a prime factor for the prediction, assessment and mapping of wind erosion. Consequently, this study was undertaken to generate (WE) data, pertinent relationships and produce WE map for the Red Sea State. Surface soil samples (3.0 cm) were collected from thirty agricultural locations scattered all over the State, and nonerodible soil particles (NEP >0.85 mm in diameter), WE and various relevant physical and chemical soil properties were determined. Regression analysis showed that NEP significantly ( p<0.001) increased with increase in Clay ( R2 =0.5451), OM (R2 =0.3907), Clay/(Silt+Sand) (R2 =0.5254), and decreased with increase of Sand (R2 =0.4813), (Silt +Sand) / Clay (R2 =0.5414), (Silt + Sand)/(C+CaCO3 ) (R2 =0.5685) and (Silt +Sand)/(C+OM) (R2 =0.5428). The three soil particle size and their ratios gave the reverse effects on WE with slightly higher or lower coefficients of determination. The (Silt+Sand)/(C+CaCO3) ratio is recommended as an index of NEP and to predict the NEP and lookup WE from the standard table. Generally, wind erodiblity of the Red Sea State soil is very high ranging from 49.6 ton/ha to 278.6 ton/ha with a mean 152.2 ton/ha and coefficient of variation equal to 4.9 %. The NEP of the wind erodiblity groups correlated very well with those established at the national and international levels.
Description: 75 Pages
URI: http://khartoumspace.uofk.edu/handle/123456789/9528
Date: 2015-04-26


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