نتایج جستجو برای: soil erosion

تعداد نتایج: 204320  

2006
Gamini Herath

Soil erosion in developing countries is a widespread problem causing considerable economic damage. It still remains an intractable problem in many countries. Available research findings on costs of soil erosion indicate them to be high. Soil erosion continues to be a problem due to the difficulties of estimating the economic damages and attendant difficulties in developing effective control pol...

Soil erosion can be considered as one of the most important obstacles in the way of sustainable development of agriculture and natural resources. The aim of this study is to estimate erosion and sediment yield of basin using Erosion Potential Method, in Gorganrud basin, north of Iran. The main factors in the EPM (slope average percent, erosion, rock and soil resistance, and land-use) were evalu...

2017
Ling Zhang Raghupathy Karthikeyan Hui Zhang Yuxuan Tang

Soil erosion is one of the most serious land degradation problems and the primary environmental issue in the Loess Plateau region of China. To identify the critical sub-basins and assess the impacts of land use change and climatic variability change on soil loss, this study tested the feasibility of the Soil and Water Assessment Tool (SWAT) model on sediment load simulation in the upper Sang-ka...

Journal: :Environmental microbiology 2006
Sophie Wertz Valérie Degrange James I Prosser Franck Poly Claire Commeaux Thomas Freitag Nadine Guillaumaud Xavier Le Roux

The paradigm that soil microbial communities, being very diverse, have high functional redundancy levels, so that erosion of microbial diversity is less important for ecosystem functioning than erosion of plant or animal diversity, is often taken for granted. However, this has only been demonstrated for decomposition/respiration functions, performed by a large proportion of the total microbial ...

In this research, the impact of a carbon sequestration project, in the Hossein Abad Plain in Southern Khorasan Province of Iran, on the status of water and wind erosion was evaluated. The study area has a harsh climatic condition with low annual precipitation and is prone to well-known 120-day winds in summer. Since 2005, various soil conservation treatments (plantations, over-sowing, plantatio...

2014
Zhi Qiao Xi Yang Jun Liu Xinliang Xu

and Applied Analysis 3 TM images MODIS Meteorogical data Other dataset Landuse NDVI Precipitation Temperature Wind DEM Soil Dataset of study area Soil erosion sensitivity Soil desertification sensitivity Landscape unit plaques density Landscape evenness index Land utilization degree composite index Ecological suitability index Land resources utilization degree index Ecological vulnerability in ...

2018
Rebecca B. Abney Asmeret Asefaw Berhe

Pyrogenic carbon (PyC) constitutes an important pool of soil organic matter (SOM), particularly for its reactivity and because of its assumed long residence times in soil. In the past, research on the dynamics of PyC in the soil system has focused on quantifying stock and mean residence time (MRT) of PyC in soil, as well as determining both PyC stabilization mechanisms and loss pathways. Much o...

2013
Ishtiyaq Ahmad M. K. Verma

Assessment of soil erosion is expensive and intensively long exercise. A number of parametric models have been developed to forecast soil erosion at drainage basins, yet Universal Soil Loss Equation, popularly known as USLE model is most widely used empirical formula for estimating annual soil loss from agricultural basins. With the advance of Remote Sensing technique it becomes possible to mea...

2001
Arjun M. Heimsath John Chappell William E. Dietrich Kunihiko Nishiizumi Robert C. Finkel

Late Quaternary rates of apparent soil production, bedrock incision, and average erosion are determined for the southeastern highlands of Australia using in situ produced cosmogenic nuclide concentrations of Be and Al. Apparent soil production rates define a steep, inverse exponential function of soil depth with a maximum of 143mMa 1 under zero soil depth. There were no observed soil depths bet...

Journal: :international journal of advanced biological and biomedical research 2014
mosayeb baghaie mohamad chizari

objective: the main purpose of this research is review of principles, concepts, problems and solutions of soil ethic. methods: in this research by descriptive method and delphi technique was used for identifying soil ethical concepts, soil ethical principles, problems and difficulties of soil ethics in iran and al around the world and suggestions for improvement of soil ethics in iran. the popu...

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