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Author: Massimo Fabris
Publisher: MDPI
ISBN: 3036513884
Category : Science
Languages : en
Pages : 194
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Book Description
In this book are reported nine works related to land subsidence monitoring using remote sensing techniques. Land subsidence is a common phenomenon in many regions of the world, where it causes degradation of local ecosystems and disruption of economic activities. Its effects are more evident in densely populated areas in particular in low-lying territories such as river deltas and coastal areas where the combination of land subsidence and sea level rise increases the flooding risk. For this reason, the monitoring of ground deformations is a crucial step to obtain important information for the development of risk mitigation strategies. In the presented papers, the characteristics of land subsidence occurring in different study areas are described, and recent developments in the used methodologies for the monitoring of the ground displacements are discussed and validated also by means of ground-based data. Moreover, advantages and disadvantages of the adopted techniques are highlighted. The outcomes of these research works can provide national and local authorities with useful information for the implementation of integrated monitoring systems in the areas most affected by land subsidence.
Author: Massimo Fabris
Publisher: MDPI
ISBN: 3036513884
Category : Science
Languages : en
Pages : 194
Get Book Here
Book Description
In this book are reported nine works related to land subsidence monitoring using remote sensing techniques. Land subsidence is a common phenomenon in many regions of the world, where it causes degradation of local ecosystems and disruption of economic activities. Its effects are more evident in densely populated areas in particular in low-lying territories such as river deltas and coastal areas where the combination of land subsidence and sea level rise increases the flooding risk. For this reason, the monitoring of ground deformations is a crucial step to obtain important information for the development of risk mitigation strategies. In the presented papers, the characteristics of land subsidence occurring in different study areas are described, and recent developments in the used methodologies for the monitoring of the ground displacements are discussed and validated also by means of ground-based data. Moreover, advantages and disadvantages of the adopted techniques are highlighted. The outcomes of these research works can provide national and local authorities with useful information for the implementation of integrated monitoring systems in the areas most affected by land subsidence.
Author: S. Kiyohara
Publisher:
ISBN:
Category :
Languages : en
Pages : 44
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Book Description
Author: M. W. A. van der Kooij
Publisher:
ISBN: 9789054111603
Category : Subsidences (Earth movements)
Languages : en
Pages : 125
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Book Description
Author: M. W. A. van der Kooij
Publisher:
ISBN:
Category : Interferometers
Languages : en
Pages : 132
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Book Description
Author: V. B. H. (Gini) Ketelaar
Publisher: Springer Science & Business Media
ISBN: 1402094280
Category : Technology & Engineering
Languages : en
Pages : 252
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Book Description
This book investigates the applicability of satellite radar interferometry (InSAR) for deformation monitoring. The presented methodologies are demonstrated in an integrated way for the entire northern part of the Netherlands and a part of Germany.
Author: Ramon F. Hanssen
Publisher: Springer Science & Business Media
ISBN: 0306476339
Category : Technology & Engineering
Languages : en
Pages : 318
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Book Description
This book is the product of five and a half years of research dedicated to the und- standing of radar interferometry, a relatively new space-geodetic technique for m- suring the earth’s topography and its deformation. The main reason for undertaking this work, early 1995, was the fact that this technique proved to be extremely useful for wide-scale, fine-resolution deformation measurements. Especially the interf- ometric products from the ERS-1 satellite provided beautiful first results—several interferometric images appeared as highlights on the cover of journals such as Nature and Science. Accuracies of a few millimeters in the radar line of sight were claimed in semi-continuous image data acquired globally, irrespective of cloud cover or solar illumination. Unfortunately, because of the relative lack of supportive observations at these resolutions and accuracies, validation of the precision and reliability of the results remained an issue of concern. From a geodetic point of view, several survey techniques are commonly available to measure a specific geophysical phenomenon. To make an optimal choice between these techniques it is important to have a uniform and quantitative approach for describing the errors and how these errors propagate to the estimated parameters. In this context, the research described in this book was initiated. It describes issues involved with different types of errors, induced by the sensor, the data processing, satellite positioning accuracy, atmospheric propagation, and scattering character- tics. Nevertheless, as the first item in the subtitle “Data Interpretation and Error Analysis” suggests, data interpretation is not always straightforward.
Author: Damien Closson
Publisher: BoD – Books on Demand
ISBN: 9535115898
Category : Science
Languages : en
Pages : 322
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Book Description
The aim of this book is to demonstrate the use of SAR data in three application domains, i.e. land cover (Part II), topography (Part III), and land motion (Part IV). These are preceded by Part I, where an extensive and complete review on speckle and adaptive filtering is provided, essential for the understanding of SAR images. Part II is dedicated to land cover mapping. Part III is devoted to the generation of Digital Elevation Models based on radargrammetry and on a wise fusion (by considering sensor characteristic and acquisition geometry) of interferometric and photogrammetric elevation data. Part IV provides a contribution to three applications related to land motion.
Author: Jin Woo Kim
Publisher:
ISBN:
Category :
Languages : en
Pages : 152
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Book Description
Abstract: Development of coastal wetlands and arid areas had negative impacts on the natural hydrological processing on the surface and underground, and it resulted in disappearance of wetlands that buffer severe flooding and function as home for various wildlife in the wetlands, and groundwater depletion in the desert areas. Continuously monitoring the surface change caused by human activities requires radar remote sensing with the in-situ measurements. The intensity and phase components of Synthetic Aperture Radar (SAR) data provide valuable information on the characteristics of surface change and ground deformation. First of all, in this study, we demonstrated that the wetland water level changes in the Atchafalaya Basin of the Louisiana can be effectively observed by integrating Interferometric SAR (InSAR) results and radar altimetry data. When the hydrologic flow between wetlands is disrupted by levees or dams, InSAR processing cannot appropriately resolve the absolute water level changes from unwrapped phases. The fusion of the two radar technologies enables one to accurately estimate absolute water level change while avoiding inconsistent phase unwrapping. Secondly, the water level in the Everglades is measured by monitoring stations, and the measurement is often disturbed by abrupt water level rise. The L-band SAR backscatter coefficient in Everglades has the characteristics that SAR intensity is inversely proportional with water level in the freshwater marsh. The linear relationship enables one to estimate water level from SAR backscattering coefficients. The correlation between two parameters over the sawgrass was high, and it implied that water level estimation from the ALOS L-band SAR backscatter coefficients is possible. The final study demonstrated the use of small baseline subset (SBAS) InSAR processing technique to effectively measure the ground subsidence caused by groundwater depletion in Tucson, Arizona. The SBAS processing suppresses atmospheric artifacts affected by turbulent mixing that appears random in time and space and estimates topographic error terms from multiple InSAR pairs. The SBAS InSAR-derived vertical deformation gives information on the spatial extent and magnitude of subsidence. The groundwater level decrease of tens of meter caused the ground subsidence of tens of centimeters over a 17-years time period. InSAR results indicate that the subsidence has recently slowed down possibly due to the artificial recharge of water into surrounding aquifers near Tucson, Arizona.
Author: Nguyen Trung Viet
Publisher: Springer Nature
ISBN: 9811502919
Category : Science
Languages : en
Pages : 1483
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Book Description
This book presents selected articles from the International Conference on Asian and Pacific Coasts (APAC 2019), an event intended to promote academic and technical exchange on coastal related studies, including coastal engineering and coastal environmental problems, among Asian and Pacific countries/regions. APAC is jointly supported by the Chinese Ocean Engineering Society (COES), the Coastal Engineering Committee of the Japan Society of Civil Engineers (JSCE), and the Korean Society of Coastal and Ocean Engineers (KSCOE). APAC is jointly supported by the Chinese Ocean Engineering Society (COES), the Coastal Engineering Committee of the Japan Society of Civil Engineers (JSCE), and the Korean Society of Coastal and Ocean Engineers (KSCOE).
Author: Hairi Ahmad
Publisher:
ISBN:
Category :
Languages : en
Pages : 73
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Book Description
