desertification in arid, semi-arid and dry sub-humid regions is a global environmental problem. considering theincreasing importance of desertification and its complexity, the necessity of giving attention to desertification criteria andindices is essential. models and methods such as medalus, unep-fao, and others have been proposed on local andnational scales. in this research, imdpa was selec...

desertification refers to land degradation phenomenon in arid, semi-arid and dry sub-humid areas, resulting from various factors including climate variation and human activities. for evaluation and mapping of desertification many research have been conducted leading to regional and local models. in this research, among different existing methods imdpa was selected and desertification intensity ...

An overview of the Geospatial Methodologies used in order to assess the Soil Erosion Risk by water. 1.2 The damages on Land are traduced in " Soil Erosion " , " Soil Degradation " and/or " Ecosystem Decline " .. Introduction The Soils constitute one of the most important of the world's natural resources. Life on earth is totally dependent on well management of soils (Agurgo, 1996). Into of the ...

soil compaction has become a widespread problem in the world and it is considered as one of the main factors affecting land degradation in arid and semi-arid agricultural land. the aim of this study was to investigate the effects of soil compaction on soil carbon and nitrogen sequestration, physical (aggregate stability, saturated soil moisture content, bulk density, and porosity) and chemical ...

soil erosion is one of the most important forms of land degradation that threatens continued and sustained agricultural production in ghana. the most severely affected areas are the three northern regions especially upper east region, where large tracts of land have been destroyed by water erosion leading to soil depth reduction and decline in soil fertility. this study was carried out in talen...

Land degradation monitoring is of vital importance to provide scientific information for promoting sustainable land utilization. This paper presents an expert knowledge and BP-ANN-based approach to detect and monitor land degradation in an effort to overcome the deficiencies of image classification and vegetation index-based approaches. The proposed approach consists of three generic steps: (1)...

during past decades, increased wastewater production by human activities intensified the problem of wastewater usewithout causing undesirable impacts on the environment and human life. however, practice of wastewater use inirrigation crops and green spaces needs careful control because of the potential presence of unwanted constituents such asheavy metals and organic contaminants. this research...

the present study aims to simulate the spatial pattern of land use change in lisar protected area,iran. land cover maps for 1989, 2000, and 2007 were depicted using tm, etm+, and irs liss-iii images ofthe area at stake. images were classified using a merge of unsupervised and supervised classification. camarkov model was used to predict land cover maps as a top-down approach in investigating la...

soil degradation means lose of soil quality which usually is caused by improper use of land by human. decline of soil quality includes lose of physical, chemical and biological properties of soil. this study aimed to identify and assess the quality of soil and land, to determine the type of land degradation and estimates their severity based on completed forms gathered field data and mapping th...