Long-term challenge to mangrove in the National park Xuanthuy – data released from shallow subsidence monitoring

A small mangrove colony growing for several decades on a mud flat on the left side of Balat River mouth has become today a large and healthy forest, containing a high ecosystem service value in the core of the Red River biosphere reserve. As a pioneer ecosystem located at land– water interface in the tropic, there exist always risks to mangroves, especially due to climate change and sea level rise. Sea level rise is a worldwide process, but subsidence is a local problem that can exacerbate these geo-hazards. A monitoring of shallow subsidence has been carried out by using SET-MH technique (developed by the United States Geological Survey) to track the both accretion and land sinking in the core zone of the National Park. The measurement shows the average sedimentation rate of 2.9 cm / yr and the sinking rate of 3.4 cm / yr, since Dec. 30th 2012. This is the first ground-based observation of shallow subsidence under mangroves in the Tonkin Gulf. As a simple and low cost method, so further expansion of this monitoring could provide more useful information to help identify the generally sinking trend of coastal areas in the Red River Delta and also to protect its own biosphere reserve.

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Composition and Flux of Holocene Sediments on the Eastern Laptev Sea Shelf, Arctic Siberia

Quaternary Research ◽

10.1006/qres.2000.2223 ◽

2001 ◽

Vol 55 (3) ◽

pp. 344-351 ◽

Cited By ~ 41

Author(s):

Henning A. Bauch ◽

Heidemarie Kassens ◽

Olga D. Naidina ◽

Martina Kunz-Pirrung ◽

Jörn Thiede

Keyword(s):

Sea Level Rise ◽

Sea Level ◽

River Mouth ◽

Sediment Flux ◽

Sediment Type ◽

Laptev Sea ◽

The Core ◽

Clayey Silt ◽

Marine Fossils ◽

Total Sediment

AbstractA 467-cm-long core from the inner shelf of the eastern Laptev Sea provides a depositional history since 9400 cal yr. B.P. The history involves temporal changes in the fluvial runoff as well as postglacial sea-level rise and southward retreat of the coastline. Although the core contains marine fossils back to 8900 cal yr B.P., abundant plant debris in a sandy facies low in the core shows that a river influenced the study site until ∼8100 cal yr B.P. As sea level rose and the distance to the coast increased, this riverine influence diminished gradually and the sediment type changed, by 7400 cal yr B.P., from sandy silt to clayey silt. Although total sediment input decreased in a step-like fashion from 7600 to 4000 cal yr B.P., this interval had the highest average sedimentation rates and the greatest fluxes in most sedimentary components. While this maximum probably resulted from middle Holocene climate warming, the low input of sand to the site after 7400 cal yr B.P. probably resulted from further southward retreat of the coastline and river mouth. Since about 4000 cal yr B.P., total sediment flux has remained rather constant in this part of the Laptev Sea shelf due to a gradual stabilization of the depositional regime after completion of the Holocene sea-level rise.

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Tools for assessing sea level rise vulnerability

Journal of Water and Climate Change ◽

10.2166/wcc.2014.045 ◽

2014 ◽

Vol 6 (2) ◽

pp. 181-190 ◽

Cited By ~ 6

Author(s):

Frederick Bloetscher ◽

Thomas Romah

Keyword(s):

Sea Level Rise ◽

Sea Level ◽

Local Level ◽

The United States ◽

Light Detection And Ranging ◽

United States Geological Survey ◽

Light Detection ◽

Florida Department ◽

Private And Public ◽

Using Data

Increasing sea level has the potential to place important infrastructure we rely on every day at risk, yet we lack good data to make decisions on what to do, when, and with what priority. The objectives of the research were to develop a method for estimating the time scales for various increments of sea level rise (SLR) throughout the 21st century, develop an accurate methodology for predicting impacts of SLR at the local level, and develop recommendations as to how existing data sources can be utilized to identify infrastructure vulnerable to SLR. The methodology was applied to southeast Florida using data from the Florida Department of Transportation, the United States Geological Survey, the National Oceanic and Atmospheric Administration and other sources, integrated with low resolution light detection and ranging data, topographic data, and aerial photographic maps to identify potentially vulnerable infrastructure. Overlaying high resolution light detection and ranging data onto a base map enabled creation of mapping tools to evaluate potentially vulnerable infrastructure. Using these recommendations, a protocol was developed to use groundwater adjusted models in southeast Florida which indicated potential underestimation of the risk of damage to public infrastructure and private and public buildings.

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THE ROLE OF SEA-LEVEL RISE AND STORMS IN FORMATION AND RESILIENCE OF FLORIDA BAY ISLANDS, EVERGLADES NATIONAL PARK

10.1130/abs/2019se-326640 ◽

2019 ◽

Author(s):

G. Lynn Wingard ◽

◽

Miriam C. Jones ◽

Sarah E. Bergstresser ◽

Bethany L. Stackhouse ◽

...

Keyword(s):

Sea Level Rise ◽

Sea Level ◽

National Park ◽

Florida Bay ◽

Everglades National Park ◽

Bay Islands

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Economic damages from Hurricane Sandy attributable to sea level rise caused by anthropogenic climate change

Nature Communications ◽

10.1038/s41467-021-22838-1 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Benjamin H. Strauss ◽

Philip M. Orton ◽

Klaus Bittermann ◽

Maya K. Buchanan ◽

Daniel M. Gilford ◽

...

Keyword(s):

Climate Change ◽

Sea Level Rise ◽

Sea Level ◽

East Coast ◽

The United States ◽

Hurricane Sandy ◽

Water Levels ◽

Anthropogenic Climate Change ◽

Economic Damage ◽

Sea Levels

AbstractIn 2012, Hurricane Sandy hit the East Coast of the United States, creating widespread coastal flooding and over $60 billion in reported economic damage. The potential influence of climate change on the storm itself has been debated, but sea level rise driven by anthropogenic climate change more clearly contributed to damages. To quantify this effect, here we simulate water levels and damage both as they occurred and as they would have occurred across a range of lower sea levels corresponding to different estimates of attributable sea level rise. We find that approximately $8.1B ($4.7B–$14.0B, 5th–95th percentiles) of Sandy’s damages are attributable to climate-mediated anthropogenic sea level rise, as is extension of the flood area to affect 71 (40–131) thousand additional people. The same general approach demonstrated here may be applied to impact assessments for other past and future coastal storms.

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Macroseismic survey of the 6 February 2016 KwaZulu-Natal, South Africa earthquake

South African Journal of Geology ◽

10.25131/sajg.125.0004 ◽

2021 ◽

Author(s):

V. Mapuranga ◽

A. Kijko ◽

I. Saunders ◽

A. Singh ◽

M. Singh ◽

...

Keyword(s):

Structural Damage ◽

Low Cost ◽

The United States ◽

United States Geological Survey ◽

Intensity Data ◽

Eastern Cape ◽

Kwazulu Natal ◽

Data Points ◽

Macroseismic Survey ◽

Intensity Data Points

Abstract On the 6th of February 2016 at 11:00 hours local time (0900 UTC), KwaZulu-Natal was struck by an earthquake of local magnitude ML=3.8. The epicentre of the earthquake was located offshore in the Durban Basin. The earthquake shaking was widely felt within the province as well as in East London in the Eastern Cape province and was reported by various national media outlets. Minor structural damage was reported. A macroseismic survey using questionnaires was conducted by the Council for Geoscience (CGS) in collaboration with the University of KwaZulu-Natal (UKZN) which yielded 41 intensity data points. Additional intensity data points were obtained from the United States Geological Survey (USGS) Did You Feel It? programme. An attempt was made to define a local intensity attenuation model. Generally, the earthquake was more strongly felt in low-cost housing neighbourhoods than in more affluent suburbs.

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COLLABORATIVE STRATEGIES FOR SEA LEVEL RISE ADAPTATION IN HAMPTON ROADS, VIRGINIA

Journal of Green Building ◽

10.3992/1943-4618.13.3.193 ◽

2018 ◽

Vol 13 (3) ◽

pp. 193-214 ◽

Cited By ~ 1

Author(s):

Carol Considine ◽

Emily Steinhilber

Keyword(s):

Sea Level Rise ◽

Sea Level ◽

Regional Scale ◽

The United States ◽

Tourism Industry ◽

Collaborative Problem Solving ◽

Hampton Roads ◽

Global Rate ◽

Municipal Boundaries ◽

Sea Level Rise Adaptation

INTRODUCTION The Hampton Roads region is located in southeastern Virginia where the Chesapeake Bay meets the Atlantic Ocean. The region includes seventeen municipal governments and has a large federal government presence with 26 federal agencies represented (See Figure 1). The region has a population that exceeds 1.7 million and is home to the deepest water harbor on the U.S. East Coast. Hampton Roads' economy is dependent on the local waterways and houses the world's largest naval facility, the sixth largest containerized cargo complex and supports a thriving shipbuilding and repair industry as well as a tourism industry. However, the region's vast coastline also contributes to its vulnerability from climate change. Hampton Roads is experiencing sea level rise at twice the global rate with regional projections in the January 2017 National Oceanic and Atmospheric Administration (NOAA) report, Global and Regional Sea Level Rise Scenarios for the United States, of 1.9 feet of sea level rise at the low end and 11.5 feet of sea level rise under the most extreme case between 2000 and 2100 (NOAA, 2017). Planning for adaptation to sea level rise requires regional partnerships and strategies, especially for watersheds that cross municipal boundaries. While many of the municipalities in the region are forward thinking in their approaches to sea level rise, there is not a regional plan for adaptation and current federal funding models do not support analysis of and planning for sea level rise impacts on a regional scale. For coastal communities to be successful in sea level rise adaptation, there has to be a national understanding that water knows no borders and only collaborative problem-solving approaches that cross municipal boundaries will move regions toward adaptation. Functional boundaries of ecosystems or watersheds need to be the focus of adaptation rather than political boundaries of local, state, and federal entities. Coordination and collaboration between entities is the only way to achieve optimal outcomes.

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The effects of tidal changes on the frequency of nuisance flooding events in the United States

10.5194/egusphere-egu2020-12115 ◽

2020 ◽

Author(s):

Sida Li ◽

Thomas Wahl ◽

David Jay ◽

Stefan Talke ◽

Lintao Liu

Keyword(s):

Sea Level Rise ◽

Sea Level ◽

High Tide ◽

The United States ◽

Tide Gauges ◽

Relative Sea Level ◽

Relative Sea Level Rise ◽

Tidal Changes ◽

Cape Fear ◽

The U.S

<p>Nuisance flooding (NF) or high tide flooding describes minor nondestructive flooding which can nonetheless cause substantial negative socio-economic impacts to coastal communities. The frequency of NF events has increased and accelerated over the past decades along the U.S. coast, leading to changes ranging from 300% to 900%. This is mainly a result of sea level rise reducing the gap between high tidal datum and flood thresholds. While long-term relative sea level rise is the main driver for the increased number of NF events, other factors such as variability in the Gulf stream, the storm climate, and infragravity waves can also contribute. Another important driver that is often overlooked is related to changes in coastal and estuary tides, through secular trends in the amplitudes of major tidal constituents. In this presentation we assess the role of tidal changes in modulating the frequency of NF events along the U.S. coastline. We analyze hourly records from 49 U.S. tide gauges for which the National Weather Service has defined NF thresholds. We find that (1) overall across all tide gauges the number of NF days has increased since 1950 due to changes in coastal tides, adding up to 100 NF days in recent years (on top of the increase due to relative sea level rise), (2) more tide gauges experience an increase in NF events than a decrease due to changes in tides, (3) tide gauges in major estuaries which have undergone major anthropogenic alterations experience the strongest changes; in Wilmington (Cape Fear estuary), for example, 10-40% of NF events in recent years can be attributed to tidal changes.&#160;</p>

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