Along with the accelerated shift of coal mining to ecologically fragile west, contradiction between resource development and ecological protection in western arid semiarid areas is rapidly intensifying. Based on above background, this thesis takes area regions as an example; applies theories ecology, subsidence, geodesy, restoration; uses remote sensing synthetic aperture radar (SAR), geographi...

A model analysis of climate and CO2 controls on tree growth in a semi-arid woodland G. Li, S. P. Harrison, and I. C. Prentice Department of Biological Sciences, Macquarie University, North Ryde, NSW 2109, Australia School of Archaeology, Geography and Environmental Sciences (SAGES), Reading University, Reading, UK AXA Chair of Biosphere and Climate Impacts, Grand Challenges in Ecosystem and the...

encroachment on ecosystem functions in a semi-arid woodland David J. Eldridge*, Santiago Soliveres, Matthew A. Bowker and James Val Office of Environment and Heritage, c/o Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia; Departamento de Biolog ıa y Geolog ıa, Escuela Superior de Ciencias Ex...

abstract this paper presents a quantitative account of vegetation–environmental factor relationships in arid rangelands. vegetation cover was recorded using braun-blanquet combined abundance-cover scale in each quadrat. within each quadrat, one profile was dug and soil samples being taken at 0-20cm and 20-100cm depths. under study physical-chemical characteristics included texture, lime, organi...

Water erosion is a major environmental problem in many parts of the world. Majority of semi-arid countries are concerned because of their specific climate and soils sensitivity, but also because of the recent intensification of human activities and agricultural practices. Accurate estimation of water erosion for various land-use and climate scenarios is so an important key to define sustainable...

Land degradation is a major danger which restricting different areas of Iran. Systematic description of the environmentfor detection of environmental changes and the human-related causes and responses is essential in land cover changestudy. Use of land cover data allow detection of where certain changes occur, what type of change, as well as how theland is changing. Existing systems for classif...