نتایج جستجو برای: clay sand

تعداد نتایج: 47913  

Journal: :International Journal of Geo-Engineering 2018

Journal: :تحقیقات آب و خاک ایران 0
نصرت اله نجفی استادیار، دانشگاه تبریز سنیه مردمی کارشناسی ارشد، دانشگاه تبریز شاهین اوستان استادیار، دانشگاه تبریز

the effects of waterlogging, sewage sludge and animal manure on the concentrations of dtpa extractable copper, iron, manganese and zinc were investigated in two different types of soil. a factorial experiment based upon a completely randomized design of two replications containing duration of waterlogging at six levels (0, 1, 3, 7, 15, 30 days), source of organic fertilizer at three levels (con...

2003
Joan L. Florsheim Jeffrey F. Mount

During the late Holocene, sediment deposition on the lowland Cosumnes River floodplain, CA has depended on factors that varied temporally and spatially, such as basin subsidence, sea level rise, flow, and sediment supply from both the Sacramento River system and from the Cosumnes River system itself, and anthropogenic changes. Through field investigations and analyses of historical maps, bridge...

2007
Hiroshi Ishii Assaf Biderman Carlo Ratti H Ishii E Ben-Joseph

N. Asgari Hafshejani S. Jafari

ABSTRACT-This experiment was carried out to study particle size distribution (PSD) of carbonates in soils and its effect on some calcareous soil properties in Khuzestan Province, Iran. Soil samples (n=72) were collected from different regions. To evaluate the effect of carbonates on water contents at pressure head of -1500kpa and PSD of soil samples, these properties were determined before and ...

2007
T. S. Yun J. C. Santamarina C. Ruppel

[1] The mechanical behavior of hydrate-bearing sediments subjected to large strains has relevance for the stability of the seafloor and submarine slopes, drilling and coring operations, and the analysis of certain small-strain properties of these sediments (for example, seismic velocities). This study reports on the results of comprehensive axial compression triaxial tests conducted at up to 1 ...

2018
Baoli Fan Allen David McHugh Shujiang Guo Quanlin Ma Jianhui Zhang Xiaojuan Zhang Weixing Zhang Juan Du Qiushi Yu Changming Zhao

Calligonum mongolicum is a successful pioneer shrub to combat desertification, which is widely used for vegetation restoration in the desert regions of northwest China. In order to reveal the limitations to natural regeneration of C. mongolicum by asexual and sexual reproduction, following the process of sand dune stabilization, we assessed clonal shoots, seedling emergence, soil seed bank dens...

2012
G. Okay P. Leroy A. Ghorbani P. Cosenza

1 UMR 7619 Sisyphe, Université de Pierre et Marie Curie, Paris, France 2 French Institute of Radioprotection and Nuclear Safety, Fontenay-aux-Roses, France 3 BRGM, French Geological Survey, Orléans, France 4 Department of Mining and Metallurgy, Yazd University, Yazd, Iran 5 Institute of Geophysics, University of Lausanne, Lausanne, Suisse 6 UMR 6269 HydrASA, ENSIP, Université de Poitiers, Poiti...

Journal: :Jurnal Kejuruteraan 2022

Greensand casting is a process that uses mixture of silica sand with addition control additions which are bentonite clay and the presence water. Control influence mechanical properties greensand mould, for this study focuses on permeability. Bentonite acts as binder activated by water to develop strength plasticity thus mould can be formed. Permeability ability gas pass through moulding aggrega...

2017
S. D. Finch D. E. Radcliffe

Little is known about how much wastewater infiltrates the soil via the trench sidewall versus the trench bottom in onsite wastewater systems. Our objectives were to develop a method of simulating trench bottom and sidewall flow using a two-dimensional numerical computer model that would include the trench within the model space and determine how much sidewall flow would occur under steady-state...

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