نتایج جستجو برای: water substrate subsidence

تعداد نتایج: 686421  

1998
Alastair H.F. Robertson

The first of two tectonic-oriented objectives during Leg 160 in the Eastern Mediterranean Sea (April–May, 1995) was concerned with study of processes of genesis and incipient collision of the Eratosthenes Seamount, a substantial crustal feature, with the active margin of the Eurasian plate to the north, represented by southern Cyprus. The upper part of the Eratosthenes Seamount (upper several h...

This study investigated the effect of Cloisite15A (C15A) organoclay in the substrate layer on the performance of reverse osmosis (RO) membranes. The substrate of the RO membranes was modified using different loading of C15A (ranging from 0.3 - 0.7 wt%) within polysulfone (PSf) substrate and the polyamide (PA) selective layer was formed on the top. Effect of the modified substrate layer on the w...

2015
Vassilis Sakkas Evangelos Lagios Spyridoula Vassilopoulou Nico Adam

The Persistent Scatterer Interferometry Wide Area Product (PSI-WAP) based on ERS1 & ERS2 radar data has been used in the seismic active area of Atalanti Faulting Zone (Central Greece) to spatially and temporally study the ground deformation for the period 1992-2003. The observed LOS velocity field, with values ranging between -0.5 to -5.0 mm/yr, combined with small standard deviation velocity v...

2009
C. Y. Zhao X. M. Qi

The City of Xian, China, has been experiencing significant land subsidence and ground fissure activities since 1960s, which have brought various severe geohazards including damages to buildings, bridges and other facilities. Monitoring of land subsidence and ground fissure activities can provide useful information for assessing the extent of, and mitigating such geohazards. In order to achieve ...

2008
Alex Hay-Man Ng Hsing-Chung Chang Kui Zhang Linlin Ge Chris Rizos

Continued excessive extraction of groundwater may lead to significant land subsidence, which causes economic loss. The aim of this research is to investigate ground subsidence in several Australian capital cities using the Persistent Scatterer Interferometry approach. Such studies may help improve our understanding of the deformation of terrain and built structures, and evaluate the effectivene...

Journal: :Proceedings of the International Association of Hydrological Sciences 2015

Journal: :Journal of spine surgery 2017
Prashanth J Rao Kevin Phan Gloria Giang Monish M Maharaj Steven Phan Ralph J Mobbs

BACKGROUND Anterior lumbar interbody fusion (ALIF) is a widely used surgical technique for disorders of the lumbar spine. One potential complication is the subsidence of disc height in the post-operative period. Few studies have reported the rate of subsidence in ALIF surgery prospectively. We prospectively evaluated the rate of subsidence in adult patients undergoing ALIF. METHODS Results we...

2017
Xiaoqiong Qin Mengshi Yang Lu Zhang Tianliang Yang Mingsheng Liao

Since the Persistent Scatterer Synthetic Aperture Radar (SAR) Interferometry (PSI) technology allows the detection of ground subsidence with millimeter accuracy, it is becoming one of the most powerful and economical means for health diagnosis of major transportation infrastructures. However, structures of different types may suffer from various levels of localized subsidence due to the differe...

2008
Sonja Spasojević Lijun Liu Michael Gurnis Dietmar Müller

[1] The dynamic subsidence of the United States east coast is addressed using the discrepancy between regional and global estimates of sea level, elevation of paleoshorelines, and adjoint models of mantle convection that assimilate plate motions and seismic tomography. The positions of Eocene and Miocene paleoshorelines are lower than predicted by global sea levels, suggesting at least 50 m, an...

2008
MA Baodong WU Lixin LIU Shanjun

Taking LandSat TM/ETM+ images as information source, this paper used the Normalized Difference Water Index (NDWI) to extract mining subsidence-resulted surface water body information in Yanzhou coal mining area. It was found that the extracted water body information would be mixed with solid-waste dumps. Taking DN 40 in band 5 as threshold value, the water bodies and solid-waste dumps were iden...

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