Abstract Background Geologic and geotechnical conditions of soils where Nanka Ajali Formations outcropped in Anambra Basin, Southeastern Nigeria were investigated accessed. This was done using detailed mapping mechanical soil laboratory tests to unravel the genesis continued expansion gully erosion study areas. Results Field revealed that erosions are more pronounced area with poor vegetation c...

This paper addresses the problem of building scalable semantic overlay networks. Our approach follows the principle of data independence by separating a logical layer, the semantic overlay for managing and mapping data and metadata schemas, from a physical layer consisting of a structured peer-to-peer overlay network for efficient routing of messages. The physical layer is used to implement var...

In this work, a contrast index for quantifying the perceived contrast in an image is proposed. The index is based on Weber’s law and takes into account background estimation through the erosion of opening by reconstruction. The performance of our proposal is illustrated with a set of images processed by contrast mapping and compared with two contrast measures given in the literature.

The occurrence and development of erosion gully will increase the area soil continuously erode cultivated land. treatment is swing in black region Northeast China. However, they are all directed at typical area, while caused by semi-arid less concerned. study uses a combination RS census data. Exploring number status development, survey results show that :the large, most them developmental gull...

Despite a multitude of studies, overall erosion rates as well as the contribution of different erosion processes on Chinese Loess Plateau (CLP) remain uncertain, which hampers a correct assessment of the impact of soil erosion on carbon and nutrient cycling as well as on crop productivity. In this paper we used a novel approach, based on field evidence, to reassess erosion rates on the CLP befo...

The formation and expansion of gullies in Rafingora community, northern sector the Bida Basin, Nigeria was investigated. This aimed at determining controlling factors for gully development area, using field parameter measurements, hydrogeological mapping geotechnical investigation soils from sites. U-shaped were mapped with sliding, slumping block fracturing as main modes propagation. Relief is...

abstract this research was conducted in the pegah - sorkh sub-catchments area, a semi-arid region in sw iran, using geographic information systems (gis) and remote sensing (rs) to compare the erosion potential method (epm) and modified pacific southwest interagency committee (mpsiac) models in erosion-potential mapping and sediment yield assessment. the study area with approximately 4600 ha sho...