نتایج جستجو برای: erosion rate

تعداد نتایج: 987131  

ژورنال: علوم آب و خاک 2014
خلیلی مقدم, بیژن, شهبازی, احسان, قربانی, زهرا,

Salt with various kinds and contents is one of the most important factors affecting soil splash erosion rate. The aim of the present study was to evaluate various salinity and alkalinity levels on splash erosion rate and its components (upslope, down slope and total splash) in different slopes. A factorial experiment with three factors was conducted in a completely randomized design with three ...

Journal: :Ecology 2015
David T Milodowski Simon M Mudd Edward T A Mitchard

The physical characteristics of landscapes place fundamental constraints on vegetation growth and ecosystem function. In actively eroding landscapes, many of these characteristics are controlled by long-term erosion rates: increased erosion rates generate steeper topography and reduce the depth and extent of weathering, limiting moisture storage capacity and impacting nutrient availability. Des...

2005
S. V. SMITH R. O. SLEEZER W. H. RENWICK R. W. BUDDEMEIER B. A. Hungate

We have developed a mass balance analysis of organic carbon (OC) across the five major river subsystems of the Mississippi (MS) Basin (an area of 3.2 3 106 km2). This largely agricultural landscape undergoes a bulk soil erosion rate of ;480 t·km22·yr21 (;1500 3 106 t/yr, across the MS Basin), and a soil organic carbon (SOC) erosion rate of ;7 t·km22·yr21 (;22 3 106 t/yr). Erosion translocates u...

Journal: :Geographical Review of Japan 1972

2016
Fidele Karamage Chi Zhang Alphonse Kayiranga Hua Shao Xia Fang Felix Ndayisaba Lamek Nahayo Christophe Mupenzi Guangjin Tian

Soil erosion has become a serious problem in recent decades due to unhalted trends of unsustainable land use practices. Assessment of soil erosion is a prominent tool in planning and conservation of soil and water resource ecosystems. The Universal Soil Loss Equation (USLE) was applied to Nyabarongo River Catchment that drains about 8413.75 km² (33%) of the total Rwanda coverage and a small par...

Journal: :مرتع و آبخیزداری 0
عطااله کاویان استادیار دانشکده منابع طبیعی، دانشگاه علوم کشاورزی و منابع طبیعی ساری فریال حیاوی کارشناس ارشد آبخیزداری، دانشگاه شهر کرد مهدی بروغنی دانشجوی دکتری آبخیزداری، دانشکده منابع طبیعی، دانشگاه تربیت مدرس

splash erosion recognized as first stage of erosion process that results of bombing soil surface with rain drop. falling rain drops to soil surface resulted moving soil particles and destructing soil structure. at this research effects of various pam rate (0, 2, 4 and 6 kg.ha) on splash erosion on three soil textuere clay, silty clay and sandy clay loam was tested. simulations were done with ra...

Journal: :The Journal of pharmacy and pharmacology 1999
T Dürig G M Venkatesh R Fassihi

The effects of the amounts of lubricants (magnesium stearate 0-5% and talc 0-3%) and changes in compaction rate and tablet porosity on the mechanism of drug release from high drug-load controlled-release theophylline tablets have been examined. Drug release was satisfactorily described by a surface-erosion model that takes into account the geometry of the tablet, differential radial and axial e...

خواجوی, الیاس, شادفر, صمد, عرب خدری, محمود, مهدیان, محمدحسین,

  Soil erosion is a serious issue in Iran. Determining the rate of soil erosion in various regions could help for better understanding of the erosion condition and soil conservation planning as well. In accordance with this constraint, more than 840 measured values derived from Cs-137 method and experimental plots in 31 research sites countrywide were collected, and analyzed related to differen...

2015
Manish Roy

Solid particle erosion is an important material degradation mechanism. Although various methods of coating are tried and used for protection against erosion, thermal sprayed coating for such purpose is the most widely used method. In this chapter, evolution of thermal sprayed coating, erosion testing methods, and erosive wear of thermal sprayed coatings are discussed extensively with emphasis o...

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