نتایج جستجو برای: land degradation

تعداد نتایج: 264605  

Journal: :Present Environment and Sustainable Development 2016

2000
J. Dumanski

Indicators of land quality (LQIs) are being developed as a means to better coordinate actions on land related issues, such as land degradation. Economic and social indicators are already in regular use to support decision making at global, national and sub-national levels and in some cases for air and water quality, but few such indicators are available to assess, monitor and evaluate changes i...

2006
A. H. Sheikh A. Alam A. M. Shah S. A. Bhat

Soil erosion is a complex dynamic process by which productive surface soils are detached, transported and accumulated in a distant place resulting in exposure of subsurface soil and sedimentation downstream. Soil erosion in catchment areas and its subsequent deposition in rivers, lakes and reservoirs are of great concern to humanity. The soil erosion upstream results in the loss of reservoir ca...

2013
Qi Chen

Accurate estimates of vegetation biomass are critical for calibrating and validating biogeochemical models (Hurtt et al. 2010), quantifying carbon fluxes from land use and land cover change (Shukla et al. 1990; Houghton et al. 2001), and supporting the United Nations Framework Convention on Climate Change (UNFCCC) program to reduce deforestation and forest degradation (Reducing Emissions from D...

2007
A. A. BERHE

Landmines are one of the most environmentally destructive aftermaths of war facing the world today. The barely chronicled global landmine problem has transcended both humanitarian and sociological concerns to bring about environmental damage. Disruption of land’s stability, pollution and loss of biodiversity constitute major ecological repercussions of landmine crisis. This review qualitatively...

2003

The two main activities of RIKS in the Ladamer project are related to land use modelling and calibration/validation methods. For the land use modelling there has been progress both on the macroand the micro level land use modelling. For the calibration and validation task the focus has been on the development of goodness-of-fit measures for cellular models. Macro level land use modelling The ma...

2012
Masoud Nasri Ali Gholami Ali Najafi

In recent years, most of the regions in the world are exposed to degradation and erosion caused by increasing population and over use of land resources. The understanding of the most important factors on soil erosion and sediment yield are the main keys for decision making and planning. In this study, the sediment yield and soil erosion were estimated and the priority of different soil erosion ...

Journal: :Annual Review of Environment and Resources 2011

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