Zobrazeno 1 - 10
of 17
pro vyhledávání: '"Amir Polak"'
Publikováno v:
Paddy and Water Environment. 8:189-198
Polymer-coated urea (PCU) is an important alternative to uncoated urea for improving nitrogen (N) use efficiency (NUE). Only a few studies discuss their utility for lowland rice systems. A 2-year field study was con- ducted to examine if nitrogen loa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ffd2a7682e7b020d0ab2a163e4c08cb9
https://doi.org/10.1007/s10333-010-0197-3
https://doi.org/10.1007/s10333-010-0197-3
The geochemistry of groundwater resources in the Jordan Valley: The impact of the Rift Valley brines
Autor:
Ittai Gavrieli, Thomas D. Bullen, Uri Shavit, Avner Vengosh, Amir Polak, Amer Marie, Bernhard Mayer, Efrat Farber
Publikováno v:
Applied Geochemistry. 22:494-514
The chemical composition of groundwater in the Jordan Valley, along the section between the Sea of Galilee and the Dead Sea, is investigated in order to evaluate the origin of the groundwater resources and, in particular, to elucidate the role of dee
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f6ad2ab13ce94f74f13d79fa26f3e144
https://doi.org/10.1016/j.apgeochem.2006.12.002
https://doi.org/10.1016/j.apgeochem.2006.12.002
Autor:
A. S. Grader, Amir Polak, Wancheng Zhu, Jinchang Sheng, Derek Elsworth, Jishan Liu, Jianxin Liu
Publikováno v:
Transport in Porous Media. 70:25-42
A digital-image-based simulation methodology is applied to evaluate the influence of heterogeneous porosity on the evolution of tracer concentrations in imaged tracer tests. Maps of computed tomography (CT)-number are calibrated relative to average p
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0ad25e8a49ac32e15ebb61a22c2c23d2
https://doi.org/10.1007/s11242-006-9080-5
https://doi.org/10.1007/s11242-006-9080-5
Publikováno v:
Transport in Porous Media. 65:385-409
Principal mechanical and chemical processes contributing to the observed spontaneous switching from net decrease in permeability to net increase in a fracture in carbonate are examined. The evolution of permeability, and related fracture aperture, is
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::bbd861269d603ddedd42f71f221127bd
https://doi.org/10.1007/s11242-006-6386-2
https://doi.org/10.1007/s11242-006-6386-2
Autor:
Yasuhiro Mitani, Amir Polak, Abraham S. Grader, Derek Elsworth, Hideaki Yasuhara, Phillip M. Halleck
Publikováno v:
Earth and Planetary Science Letters. 244:186-200
We report flow-through experiments on a natural fracture in novaculite under moderate effective stresses (∼ 1.4 MPa) and temperatures (20–120 °C) to examine the effect on flow and transport characteristics. The efflux of fluid and dissolved mine
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0715660d361057259ba2ea4ece6b4ead
https://doi.org/10.1016/j.epsl.2006.01.046
https://doi.org/10.1016/j.epsl.2006.01.046
A fully-coupled hydrological–mechanical–chemical model for fracture sealing and preferential opening
Publikováno v:
International Journal of Rock Mechanics and Mining Sciences. 43:23-36
A fully coupled hydrological–mechanical–chemical (HMC) model is developed and applied to explain enigmatic spontaneous changes in permeability that develop within a fracture in limestone under simulated in situ conditions (Water Resour Res 2004;4
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::44b89799f8ac0d2859da3e53d748c959
https://doi.org/10.1016/j.ijrmms.2005.04.012
https://doi.org/10.1016/j.ijrmms.2005.04.012
Publikováno v:
Journal of Contaminant Hydrology. 78:53-70
Flow in a rock fracture is surprisingly sensitive to the evolution of flow paths that develop as a result of dissolution. Net dissolution may either increase or decrease permeability uniformly within the fracture, or may form a preferential flow path
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5c4f7064aefca3c478e20411c8f5a7a
https://doi.org/10.1016/j.jconhyd.2005.03.001
https://doi.org/10.1016/j.jconhyd.2005.03.001
Publikováno v:
Journal of Contaminant Hydrology. 67:95-112
The vertical diffusion of NaI solution from a horizontal fracture into and within the surrounding matrix was tracked and quantified over time using an artificially fractured chalk core (30×5 cm) and a second-generation X-ray computed tomography (CT)
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1fb546c5f5df43fc3ae24fbcf38f9316
https://doi.org/10.1016/s0169-7722(03)00069-x
https://doi.org/10.1016/s0169-7722(03)00069-x
Publikováno v:
Journal of Hydrology. 268:203-213
In this paper we report on vertical variations in the values of the effective diffusion coefficient determined on 19 chalk samples collected throughout most of the Eocene section (285 m) in the northern Negev desert, Israel. The dependence of the mea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4e927931a63ce5c6789be33b80329c4c
https://doi.org/10.1016/s0022-1694(02)00176-2
https://doi.org/10.1016/s0022-1694(02)00176-2
Autor:
Amir Polak, Rony Wallach
Publikováno v:
Plant and Soil. 233:145-159
Soil moisture and suction head in an irrigated orchard were continuously monitored by time domain reflectometry (TDR) probes and gypsum blocks, respectively, during and between successive irrigation events. On each side of the trees in the plot, two
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::ac80e4e62f59a68cc6d0fb02120c3dfe
https://doi.org/10.1023/a:1010351101314
https://doi.org/10.1023/a:1010351101314