Insar Maps of Land Subsidence and Sea Level Scenarios to Quantify the Flood Inundation Risk in Coastal Cities: The Case of Singapore

Catalão, João; Raju, Durairaju; Nico, Giovanni

doi:10.3390/rs12020296

Cited by 41 publications

(26 citation statements)

References 43 publications

(31 reference statements)

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“…The IPCC scenarios indicate a sea-level increase of about 50 up to 82 cm for the next 80 years depending on the ability of each country to adhere to the Paris agreement to decrease the emission of greenhouse gases [11][12][13]. These data represent a major concern particularly for the low-lying sandy coasts, where only a relatively small increase of the sea level may cause extensive inundation [14][15][16][17]. In addition, natural and anthropogenic-induced subsidence may locally increase the rate of relative sea-level rise.…”

Section: Introductionmentioning

confidence: 99%

Anthropogenic Impact on Beach Heterogeneity within a Littoral Cell (Northern Tuscany, Italy)

Bertoni

Bini

Luppichini

et al. 2021

JMSE

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In this paper the evolution of the Northern Tuscany littoral cell is documented through a detailed analysis of the increasing anthropogenic pressure since the beginning of the 20th century. This sector of the Tuscany coast has been experiencing strong erosion effects that resulted in the loss of large volumes of sandy beaches. The anthropogenic impact on natural processes have been intensified by the construction of two ports in the early decades of the 20th century. Competent authorities reacted by building hard protection structures that tried to fix the position of the shoreline but offset the erosion drive downdrift. Therefore, in the last 20 years a regional Plan was undertaken to gradually replace the hard defense schemes with a softer approach, which involved a massive use of sediment redistribution activities. Many nourishments have been done ever since, using both sand and gravel. All these hard and soft protection operations have been archived in a geodatabase, and visualized in maps that clearly show the progressive change from hard to soft defense. This database may improve the approach to any future analysis of the littoral cell both in terms of research and management, while providing a practical example that may be easily replicated elsewhere.

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Section: Introductionmentioning

confidence: 99%

Anthropogenic Impact on Beach Heterogeneity within a Littoral Cell (Northern Tuscany, Italy)

Bertoni

Bini

Luppichini

et al. 2021

JMSE

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“…The sensitivity of microwave scattering to dielectric properties, surface roughness and target structure makes L-band SAR sensors an important tool to provide valuable information for a wide range of coastal applications [84], e.g., in the field of hydrology (flood/wetland mapping, soil moisture mapping), forestry (mangrove cover, forest structure), agriculture (vegetation height, crop type mapping, soil moisture) land cover or land subsidence [85][86][87]. Microwave backscatter for different surfaces under flooded and non-flooded conditions is shown in Figure 3, which addresses the main scattering types, including surface backscattering, volume backscattering and double-bounce backscattering.…”

Section: Radar Backscatter Characteristics For Different Surfacesmentioning

confidence: 99%

Spaceborne L-Band Synthetic Aperture Radar Data for Geoscientific Analyses in Coastal Land Applications: A Review

Ottinger

Kuenzer

2020

Remote Sensing

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The coastal zone offers among the world’s most productive and valuable ecosystems and is experiencing increasing pressure from anthropogenic impacts: human settlements, agriculture, aquaculture, trade, industrial activities, oil and gas exploitation and tourism. Earth observation has great capability to deliver valuable data at the local, regional and global scales and can support the assessment and monitoring of land- and water-related applications in coastal zones. Compared to optical satellites, cloud-cover does not limit the timeliness of data acquisition with spaceborne Synthetic Aperture Radar (SAR) sensors, which have all-weather, day and night capabilities. Hence, active radar systems demonstrate great potential for continuous mapping and monitoring of coastal regions, particularly in cloud-prone tropical and sub-tropical climates. The canopy penetration capability with long radar wavelength enables L-band SAR data to be used for coastal terrestrial environments and has been widely applied and investigated for the following geoscientific topics: mapping and monitoring of flooded vegetation and inundated areas; the retrieval of aboveground biomass; and the estimation of soil moisture. Human activities, global population growth, urban sprawl and climate change-induced impacts are leading to increased pressure on coastal ecosystems causing land degradation, deforestation and land use change. This review presents a comprehensive overview of existing research articles that apply spaceborne L-band SAR data for geoscientific analyses that are relevant for coastal land applications.

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“…However, the current situation of land subsidence in China deteriorates with urbanization progress, especially in cities with rapid urbanization. Additionally, in addition to land subsidence, other secondary disasters, such as sinkholes [3], urban flooding [4], infrastructure damage [5], and seawater intrusion in coastal areas [6,7], can threaten people's lives and the normal operation of cities. Specific to the city of Shenzhen, it has undergone tremendous urbanization with the rapid development of the Guangdong-Hong Kong-Macao Greater Bay Area (GBA) in the past few decades [8].…”

Section: Introductionmentioning

confidence: 99%

Understanding the Spatial-Temporal Characteristics of Land Subsidence in Shenzhen under Rapid Urbanization Based on MT-InSAR

Sun

Liu

et al. 2023

IEEE J. Sel. Top. Appl. Earth Observations Remote Sensing

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Land subsidence is a common geological hazard in urban areas. It can be caused by human activities such as land reclamation and subway construction. However, rapid urbanization can accelerate the progress of these activities. Therefore, spatial-temporal analysis of land subsidence can provide a guarantee for rapid urbanization progress. In this study, Shenzhen, one of the fastest urbanizing cities in China, is selected for continued land subsidence monitoring. We collected 153 Sentinel-1A images from December 2015 to July 2021 and utilized an interferometric point target analysis (IPTA) method to generate the land subsidence in Shenzhen. Additionally, we analyzed the relationship between land subsidence and typical urbanization progress: land reclamation, transportation network, and urban construction. The results show that land subsidence mostly occurs in the western reclamation area, with a maximum rate of -74.9 mm/a in Qianhai Bay. Areas with larger quaternary marine sediment thickness in the range of 10~20 m are more likely to experience subsidence. Obvious subsidence (<-20 mm/a) along the subway mainly occurred on Lines 11 and Line 5, which is inversely proportional to the distance from the metro. The correlation coefficient is -0.197. Areas with low road densities have a high probability of experiencing great subsidence. A relationship between land subsidence and building construction in the Guangming district is found. Obvious subsidence (<-20 mm/a) mainly occurred in the building areas, with a percentage of 43.48%.

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Insar Maps of Land Subsidence and Sea Level Scenarios to Quantify the Flood Inundation Risk in Coastal Cities: The Case of Singapore

Cited by 41 publications

References 43 publications

Anthropogenic Impact on Beach Heterogeneity within a Littoral Cell (Northern Tuscany, Italy)

Anthropogenic Impact on Beach Heterogeneity within a Littoral Cell (Northern Tuscany, Italy)

Spaceborne L-Band Synthetic Aperture Radar Data for Geoscientific Analyses in Coastal Land Applications: A Review

Understanding the Spatial-Temporal Characteristics of Land Subsidence in Shenzhen under Rapid Urbanization Based on MT-InSAR

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