نتایج جستجو برای: soil erosion model

تعداد نتایج: 2282732  

2015
Paschalis Koutalakis George N. Zaimes Valasia Iakovoglou Konstantinos Ioannou

Mitigating soil erosion, especially in Mediterranean countries such as Greece, is essential in order to maintain environmental and agricultural sustainability. In this paper, scientific publications related to soil erosion studies in Greece were reviewed and categorized. To accomplish this, the online search engine of Scopus was used. The key words were “soil”, “erosion” and “Greece.” An analys...

2004
Elena Amore Carlo Modica Mark A. Nearing Vincenza C. Santoro

Accurate estimation of soil erosion due to water is very important in several environmental contexts, such as the assessment of potential soil loss from cultivated lands and the evaluation of the loss of water storage capacity in reservoirs due to sediment deposition. Several studies have been carried out to build models suitable to quantify the results of erosion processes. These models, calib...

2015

Land degradation and soil erosion threaten agricultural productivity, food security and environmental sustainability. Because formation of new soil takes place over a period of thousands of years, in human terms it is essentially a finite resource. Human activity has accelerated erosion rates through inappropriate land management practices, most importantly soil sealing, deforestation and inten...

Journal: :Journal of environmental quality 2002
Jeffrey J Whicker David D Breshears Piotr T Wasiolek Thomas B Kirchner Rebecca A Tavani David A Schoep John C Rodgers

Redistribution of soil, nutrients, and contaminants is often driven by wind erosion in semiarid shrublands. Wind erosion depends on wind velocity (particularly during episodic, high-velocity winds) and on vegetation, which is generally sparse and spatially heterogeneous in semiarid ecosystems. Further, the vegetation cover can be rapidly and greatly altered due to disturbances, particularly fir...

ژورنال: علوم آب و خاک 2021

Wind erosion is one of the environmental problems worldwide, particularly in arid and semi-arid areas of Iran. Different methods and models have been proposed to measure and monitor wind erosion in the recent years. One of the accurate models for measuring f wind erosion is the USEPA model. The purpose of this study was to evaluate the quantification of wind erosion with the USEPA model and the...

One of the problems of controlling erosion and sedimentation in catchment areas is the lack of statistical data to accurately estimate the amount of sedimentation and erosion. In order to implement soil protection programs and determine methods to reduce sedimentation, it is necessary to estimate the total volume of annual sediment production. The purpose of this study is to estimate the erosio...

2010
Sujith Ravi Paolo D’Odorico Travis E. Huxman Scott L. Collins

Shrub encroachment in arid and semiarid rangelands, a worldwide phenomenon, results in a heterogeneous landscape characterized by a mosaic of nutrient-depleted barren soil bordered by nutrient-enriched shrubby areas known as ‘‘fertile islands.’’ Even though shrub encroachment is considered as a major contributor to rangeland degradation, little is known about mechanisms favoring the reversibili...

Journal: :تحقیقات آب و خاک ایران 0
فریده عباس زاده افشار شمس اله ایوبی احمد جلالیان حسین خلقی فرید اصغری زاده

soil erosion and its associated land degradation represent major problems for development as well as for environmental resources protection. there is an urgent need to obtain reliable quantitative data on the extent and rates of soil erosion worldwide. the use of 137cs radionuclide for studying soil erosion and deposition is a valuable tool employed throughout the world. in the present study, u...

شهنواز, یاسر, علی پور, حمید, غلام نیا, اعظم, هاتفی اردکانی, امیرحسین, هاشمی نسب, سیده نگار,

Wind erosion is important in areas with less than 150 mm of rainfall Measuring the extent and severity of wind erosion in many countries, including Iran, there is no station to measure wind erosion sediments and so the deposition estimation methods rely on empirical models so that in many cases there are measurement errors. With estimates wind and water erosion and deposition potential compared...

ژورنال: علوم آب و خاک 2020

In semi-arid regions, soils are weakly aggregated and subjected to water erosion processes especially rill and interrill erosion. There is no information on the rate of these water erosion types in semi-arid soils located in the hillslopes. Therefore, this study was conducted to determine the soils susceptibility to these erosion types in semi-arid region. A laboratory experiment was done in ei...

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