University of Khartoum

Assessment and Mapping of Wind Erodibility of Soils from the Nile State Using GIS Techniques

Assessment and Mapping of Wind Erodibility of Soils from the Nile State Using GIS Techniques

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Title: Assessment and Mapping of Wind Erodibility of Soils from the Nile State Using GIS Techniques
Author: Ahmed Hassan, Abdelmonim
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 a WE map for the Nile State. Surface soil samples (0-3 cm) were collected from fifty farms scattered all over the State and non-erodible soil particles (NEP) (>0.84 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 increases in Clay (R2= 0.7214), CaCO3 (R2= 0.2904), OM (R2= 0.3155), Clay/(Silt+Sand) (R2= 0.6186), and decreased with increase of Sand (R2= 0.5515), (Silt+Sand)/Clay (R2= 0.7213), (Silt+Sand)/(Clay+CaCO3) (R2= 0.7268), and (Silt+Sand)/(Clay+OM) (R2= 0.7213). The four basic soil properties and their ratios gave the reverse effects on WE with slightly higher or lower coefficients of determination. The (Silt+Sand)/(Clay+CaCO3) ratio is recommended as an index of NEP, because it integrates the three resilient primary soil particles and the slightly soluble CaCO3. It is recommended to predict NEP and look up WE from the standard table. Generally, wind erodibility of the Nile State soils is high. The NEP of the wind erodibility groups correlated very well with those established elsewhere
Description: 76 Pages
URI: http://khartoumspace.uofk.edu/handle/123456789/9383
Date: 2015-04-23


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