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Soil Erosion and Conservation
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TLDR
In this article, a review of worldwide land degradation problems is presented, focusing on delineating and estimating the magnitude of soil erosion, quantifying erosion and sedimentation impacts on land productivity, establishing quantitative values for erosion-causing parameters, and implementing global and regional soil and water conservation programs.Abstract:
This is a review of worldwide land degradation problems. Four themes are emphasized: delineating and estimating the magnitude of soil erosion, quantifying erosion and sedimentation impacts on land productivity, establishing quantitative values for erosion-causing parameters, and implementing global and regional soil and water conservation programs. Papers deal with both developing and developed countries and illustrate how erosion control techniques used in developed countries can or cannot be applied in developing countries.read more
Citations
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Journal ArticleDOI
Environmental and Economic Costs of Soil Erosion and Conservation Benefits
David Pimentel,Celia A. Harvey,P. Resosudarmo,K. Sinclair,D. Kurz,M. McNair,S. Crist,L. Shpritz,L. Fitton,R. Saffouri,R. Blair +10 more
TL;DR: With the addition of a quarter of a million people each day, the world population's food demand is increasing at a time when per capita food productivity is beginning to decline.
Journal ArticleDOI
Gully erosion and environmental change: importance and research needs
TL;DR: In this article, the authors highlight the need for monitoring, experimental and modelling studies of gully erosion as a basis for predicting the effects of environmental change (climatic and land use changes) on gully degradation rates.
Journal ArticleDOI
Hydrological functions of tropical forests: not seeing the soil for the trees?
TL;DR: In this article, a wide range of available scientific evidence with respect to the influence exerted by the presence or absence of a good forest cover on regional climate (rainfall), total and seasonal water yield (floods, low flows), as well as on different forms of erosion and catchment sediment yield under humid tropical conditions in general and in southeast Asia in particular.
Journal ArticleDOI
Recent trends in the suspended sediment loads of the world's rivers
Desmond E. Walling,D. Fang +1 more
TL;DR: In this article, a preliminary assessment of current trends in the sediment loads of the world's rivers, longer-term records of annual sediment load and runoff were assembled for 145 major rivers.
Journal ArticleDOI
Nitrogen in crop production: An account of global flows
TL;DR: In this article, it was shown that despite some significant local and regional losses, the world's agricultural land accumulates N. The best evidence suggests that in spite of some significant localized losses, agricultural land still accumulates about 85% of the reactive N in the world.
References
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Journal ArticleDOI
The Tragedy of the Commons
TL;DR: The population problem has no technical solution; it requires a fundamental extension in morality.
Journal ArticleDOI
Erosional development of streams and their drainage basins; hydrophysical approach to quantitative morphology
TL;DR: The most important single factor involved in erosion phenomena and, in particular in connection with the development of stream systems and their drainage basins by aqueous erosion is called crossgrading.
Journal ArticleDOI
Fluvial Processes in Geomorphology
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TL;DR: The use of wind tunnel data for aerodynamic experiments has been studied in this article, where three dimensions of three-dimensional flow and pressure, flow, and shear stress measurements are used to calibrate the test section.