نتایج جستجو برای: soil subsidence
تعداد نتایج: 185226 فیلتر نتایج به سال:
Abstract Peatland ecosystems are globally important carbon stores. Disturbances, such as drainage and climate drying, act to lower peatland water table depths, consequently enhancing soil release subsidence rates. Here, we conduct a global meta-analysis quantify the relationship among depth, subsidence. We find that decline stimulated heterotrophic, rather than autotrophic, respiration, which w...
Seawalls are built for Protecting of beaches against waves and preventing the progression of water to the beach. For a proper understanding about these constructions, a suiTable information about applied loads on these constructions should be existed. One of the important load that applied on these constructions is sea wave. Others loads are included: weight force of the walls, weight force of ...
Abnormal surface subsidence has become a widespread geological problem being faced by cities. As first-tier city in the world, there are problems such as unclear analysis of mechanism. Therefore, monitoring Shanghai is particularly important. In this paper, Sentinel-1A satellite SAR image data 36 scenes covering area from January 2018 to March 2020 were processed on basis time-series interferom...
The review of geochronological and historical data documents that the largest southern European deltas formed almost synchronously during two short intervals of enhanced anthropic pressure on landscapes, respectively during the Roman Empire and the Little Ice Age. These growth phases, that occurred under contrasting climatic regimes, were both followed by generalized delta retreat, driven by tw...
Distributed optical fibre sensing, employing either Rayleigh, Raman, or Brillouin scattering, is the only physical-contact sensor technology capable of accurately estimating physical fields with spatial continuity along the fibre. This unique feature and the other features of standard optical fibre sensors (e.g., minimal invasiveness and lightweight, remote powering/interrogating capabilities) ...
Interferometric synthetic aperture radar (InSAR) is a powerful geodetic tool used to construct digital elevation models of the earth’s topography and to image centimeter-scale displacements associated with crustal deformation and the flow of ice sheets. The past decade has seen significant improvements in our understanding of earthquakes, volcanoes, and glaciers as a direct result of this techn...
Shanghai maglev is a very fast traffic tool, so it is very strict with the stability of the roadbed. However, the ground subsidence is a problem in Shanhai because of the poor geological condition and some human-induced factors. So it is necessary to monitor ground subsidence in the area along the Shanghai maglev precisely and frequently. Traditionally, precise levelling method is used to surve...
STUDY DESIGN An idealized biomechanical model. OBJECTIVE The aim of this study was to evaluate the biomechanical properties of a construct designed to minimize intervertebral cage subsidence and maximize stiffness. SUMMARY OF BACKGROUND DATA Reconstruction after vertebral resection typically involves posterior segmental fixation and anterior interbody support. However, poor bone density, ad...
Thermokarst is the process of ground subsidence caused by either the thawing of ice-rich permafrost or the melting of massive ground ice. The consequences of permafrost degradation associated with thermokarst for surface ecology, landscape evolution, and hydrological processes have been of great scientific interest and social concern. Part of a tundra patch affected by wildfire in northern Alas...
trol both soil oxidation and P losses include maintaining water tables as high as possible without jeopardizing Histosols of the Everglades Agricultural Area (EAA) are subsiding crop yields and growing crops that are tolerant to high primarily from aerobic microbial oxidation. An experiment was conwater table levels (Anderson and Flaig, 1995). ducted in a Histosol to evaluate methods [14C-benzo...
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