نتایج جستجو برای: erosion control

تعداد نتایج: 1356155  

2007
J. Kristian Aase David L. Bjorneberg Robert E. Sojka

Many semiarid and arid soils are prone to irrigation-induced erosion. Polyacrylamide (PAM) greatly reduces erosion from furrow irrigation. We hypothesized that PAM applied via sprinklers will provide erosion control and benefit water infiltration and aggregate stability. Screened (6.4 mm) Rad silt loam (coarse silty, mixed, superactive mesic Durinodic Xeric Haplocambid) was placed in 1.5 by 1.2...

2015
Aline Rogéria Freire de CASTILHO Priscila Maria Aranda SALOMÃO Marília Afonso Rabelo BUZALAF Ana Carolina MAGALHÃES

OBJECTIVE This in vitro study assessed the anti-erosive effect of experimental mouthrinses containing TiF4 and NaF on dentin erosive loss. MATERIAL AND METHODS Bovine dentin specimens were randomly allocated into the groups (n=15): (1) SnCl2/NaF/AmF (Erosion Protection/GABA, pH 4.5, positive control); (2) experimental solution with 0.0815% TiF4(pH 2.5); (3) 0.105% NaF (pH 4.5); 4) 0.042% NaF+...

Journal: :REM - International Engineering Journal 2021

The installation of solar parks requires extensive areas and results in soil erosion many cases. One suitable solution is applying lime to improve characteristics, such as mechanical strength, stability, workability, durability, internal surface resistance. This treatment particular importance when dealing with hydraulic structures conceived the park drainage systems. erodibility tests were per...

Journal: :Circulation. Cardiovascular genetics 2011
Christopher D Anderson Michael A Nalls Alessandro Biffi Natalia S Rost Steven M Greenberg Andrew B Singleton James F Meschia Jonathan Rosand

BACKGROUND Survival bias is the phenomenon by which individuals are excluded from analysis of a trait because of mortality related to the expression of that trait. In genetic association studies, variants increasing risk for disease onset as well as risk of disease-related mortality (lethality) could be difficult to detect in genetic association case-control designs, possibly leading to underes...

2010
J. B. Grau J. M. Anton A. M. Tarquis J. M. Cisneros

Mathematical model to select the optimal alternative for an integral plan to desertification and erosion control for the Chaco Area in Salta Province (Argentine) J. B. Grau, J. M. Anton, A. M. Tarquis, F. Colombo, L. de los Rios, and J. M. Cisneros Escuela Técnica Superior de Ingenieros Agrónomos, Universidad Politécnica de Madrid, Spain Universidad Católica de Salta Salta, Provincia de Salta, ...

2003
Marian Muste Roger Gomez

An online database was designed and developed as an Iowa Highway Research Board project by the authors. Our database is intended for identifying and evaluating effective erosion and sedimentation control measures (ESCMs) for use in roadway construction throughout Iowa and elsewhere in the Midwest. The ESCM database is an efficient practical resource to aid state, county, and municipal engineers...

The effects of vegetation on wind erosion, especially in arid areas, are known, but few studies have assessed the quantitative impact of plant species. The aim of this study was to investigate the effects of plant species on wind erosion and deposits. Three experimental sites were selected in Sebri, Iran. Two sites contained two plant species, Launaea spinosa and Lactuca serriola of different s...

ژورنال: :پژوهش های دانش زمین 0
امیر صفاری دانشیار ژئومورفولوژی، دانشگاه خوارزمی مهدی احمدی دانشجوی دکتری ژئومورفولوژی و مدیریت محیط، دانشگاه خوارزمی سعید رحیمی هرآبادی دانشجوی دکتری ژئومورفولوژی و مدیریت محیط، دانشگاه خوارزمی

شناسایی عوامل موثر در گسترش فرسایش خندقی و پهنه بندی آن یکی از ابزارهای اساسی و مهم جهت مدیریت و کنترل این پدیده و انتخاب مناسب ترین گزینه در مقابله با گسترش این پدیده می باشد. از این رو هدف از این پژوهش انتخاب مهمترین معیارهای تاثیرگذار در پهنه بندی خطر فرسایش خندقی با استفاده از دو روشahp و anp، مشخص کردن نوع کاربری هایی که در محدوده مناطق با حساسیت بسیار زیاد و زیاد قرار دارند و در نهایت مقا...

2016
Iliana Diamanti Haroula Koletsi-Kounari Eleni Mamai-Homata

BACKGROUND Fluoride toothpastes presumably offer some protection against acid erosion. However, uncertainty exists towards fluoride's efficacy relatively to the concentration and the type of chemical compound used. This in vitro study evaluated the relative efficacy of toothpastes containing sodium fluoride in different concentrations or a stabilized stannous fluoride/sodium fluoride system on ...

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