Gully erosion in Biu Area is severe because of the topography, texture and rinfall intensity. There is very limited knowledge on soil erosion process and rates in this region in comparisons to other regions in Northern Nigeria. The aim of this present paper is to assess the severity or extent of soil loss (mass of soil loss) from gully erosion in Biu Area. Erosion pins were used to monitor gully erosion. Multiple Regressions analyses, soil erosion prediction variables were also used to access the extent of gully erosion in the region, from April to October (2016). The rainfall and run off factor ranged from 299.12 to 399.12mm, exchangeable calcium, magnesium and sodium rates range from 3.8 – 16.4, 0.60 – 2.80, and 0.39 – 1.74 Cmol (+) kg respectively. The basic cations (Ca, Mg) and Organic matter known for resisting erosion were significant (p< 0.05) different among sides. Where as Na and run off facilitate erosion. The annual mars of soil loss (MSL) values were 28.446, 30.050, 35.170, 48.229, 48.467 and 52.239 kg/ha/yr for Kigir, Piku, Garwashina, Daura, Miringa and Tum sites, respectively, in the study area. Gully erosion was significantly (p< 0.05) higher at Tum, Miringa, Daura and Garwashina, while it was low at Kigir and Piku sites in this study. The model showed low to high prediction strength at vocational basis.
Deleterious Effect of Gully Erosion in Biu Area, Borno state, Nigeria Ibrahim Madu
Categories: Research development