Seawall Project Research Articles

Experimental Study on Zoning Characteristics of Soft Soil Blasting Disturbance in Sea Embankment Foundation

The current research on the mechanism of blasting compaction mainly focuses on how to form a rockfill dam under the action of blasting load, but there is little research on the dynamic response characteristics of soft soil media under blasting. In blasting compaction of deep silt, it is necessary to pay attention to the damage and disturbance effect of explosive explosion on the surrounding soft soil medium, thereby providing new ideas for the study of blasting compaction mechanism of deep silt. With a seawall project in Huizhou as a prototype, based on the blasting similarity theory and through a generalized model and parameter similar design, experimental research on deep silt blasting compaction centrifuge was carried out in a 200g-t centrifuge. The physical and mechanical parameters of the silt soft soil at different positions were acquired through testing before and after the blasting, and property changes of the soft soil medium were analysed under the explosion to speculate disturbance range of the soft soil medium under the explosion effect, and divide the different blasting disturbance areas. The test results provide data support for the optimization of the design parameters of the seawall project, and also provide a useful reference for the study on the blasting compaction mechanism of deep silt and similar engineering practices.

Effect of ice load and freeze-thaw environment on seawall

Some ports in cold regions are affected by ice load and freeze-thaw cycles, and the stability of structures and foundations is affected. In this paper, based on a seawall project, through laboratory tests, the various indexes of foundation soil freezing of sea dike are tested, including frost heaving rate, frost heaving force, thawing compression coefficient of frozen soil, uniaxial compression test, shear test and bending test of frozen soil. By using the parameters obtained from the test results, a three-dimensional numerical model of seawall engineering under ice load and freeze-thaw action is established. The stress and deformation of seawall structure and foundation are simulated, and the safety and stability of seawall are comprehensively analyzed.

Thinking beyond success and failure: Dutch water expertise and friction in postcolonial Jakarta

In 2014, a consortium of Dutch firms revealed the master plan for Jakarta’s Great Garuda Sea Wall project, combining urban development and flood risk management. Though a ground-breaking ceremony was held, little progress has since been made, and the yet-to-be materialized project faces an uncertain future. Taking this project as its case study, this article examines the efforts of Dutch consultants to realize the proposed Great Garuda Sea Wall project in Jakarta, and the frictions encountered during this process. This article contributes to a growing scholarship in policy mobilities that interrogates instances of policy failure. I begin from the premise that there are valuable insights to be gleaned by examining projects and policies that occupy the space in between failure and success. By using the lens of friction, this article aims to think beyond these categories and their limitations. I demonstrate how friction can be simultaneously productive and disruptive to policymaking and mobilizing, therefore complicating binary representations of success and failure. Abandoning these limiting categories holds the possibility of enriching policy mobilities scholarship by opening up space for analyses of the messy and indeterminate processes that are central to policymaking, and which categories of success and failure are unable to capture. This is especially important for understanding policymaking in the context of the “global South” where projects often remain unrealized and such categories are less analytically useful.

Is Jakarta’s New Flood Risk Reduction Strategy Transformational?

On a conceptual and normative level, the debate around transformation in the context of disaster risk reduction and climate change adaptation has been rising sharply over the recent years. Yet, whether and how transformation occurs in the messy realities of policy and action, and what separates it from other forms of risk reduction, is far from clear. Jakarta appears to be the perfect example to study these questions. It is amongst the cities with the highest flood risk in the world. Its flood hazard is driven by land subsidence, soil sealing, changes in river discharge, and—increasingly—sea level rise. As all of these trends are set to continue, Jakarta’s flood hazard is expected to intensify in the future. Designing and implementing large-scale risk reduction and adaption measures therefore has been a priority of risk practitioners and policy-makers at city and national level. Against this background, the paper draws on a document analysis and original empirical household survey data to review and evaluate current adaptation measures and to analyze in how far they describe a path that is transformational from previous risk reduction approaches. The results show that the focus is clearly on engineering solutions, foremost in the Giant Sea Wall project. The project is likely to transform the city’s flood hydrology. However, it cements rather than transforms the current risk management paradigm which gravitates around the goal of controlling flood symptoms, rather than addressing their largely anthropogenic root causes. The results also show that the planned measures are heavily contested due to concerns about ecological impacts, social costs, distributional justice, public participation, and long-term effectiveness. On the outlook, the results therefore suggest that the more the flood hazard intensifies in the future, the deeper a societal debate will be needed about the desired pathway in flood risk reduction and overall development planning—particularly with regards to the accepted levels of transformation, such as partial retreat from the most flood-affected areas.

Stability Analysis of Embankment with Squeezing Thick Silt by Blasting

Blasting squeezing silt technology plays an important role in the marine reclamation and tidal power station seawall project construction. The thickness of soft clay gradually deepening with the ocean engineering progresses to offshore and underwater shoals. The suspended seawall structure appears in over 12m deep soft clay. Carrying out stability analysis of these seawall structures has important significance and application value. In this paper, aim at a revetment engineering stability analysis, the traditional stability analysis method and numerical simulation method were applied. Furthermore, applicability and rationality were analyzed for these methods. Studies have shown that, the safety coefficient obtained by the Swedish strip method is low, and it cannot even meet the requirements of the overall anti sliding stability in the construction period and the earthquake condition. The assumptions of Bishop, Janbu and FLAC based finite element method were closer to the actual engineering conditions. The calculated results were reliable and could be applied to the calculation of the suspended seawall.

Prediction of Long-Term Seawall Settlement Based on Least Squares Support Vector Machine

In this study, the basic principle of the least squares support vector machine (LS- SVM) method was introduced systematically. The method was applied in a seawall engineering project to establish a prediction model of long-term seawall settlement based on the LS-SVM method, and the model parameters were optimized based on the genetic algorithm. Based on the monitoring data of seawall settlement during the construction of a soft foundation seawall project in Wenzhou, China, a sample was selected to train the model, and the predicted value of long-term settlement calculated by the model was compared with the measured sample value. The results show that, with highly accurate and reliable prediction results, the prediction model of long-term seawall settlement based on the LS-SVM method possesses great application value.

Bulwark against the Bay by Mary Jo O'Rear

Reviewed by: Bulwark against the Bay by Mary Jo O'Rear Joseph Stromberg Bulwark against the Bay. By Mary Jo O'Rear. ( College Station: Texas A&M University Press, 2017. Pp. 192. Photographs, notes, bibliography, index.) Readers looking for an interesting narrative history of Corpus Christi's twisting road to the construction of a seawall will enjoy Bulwark against the Bay by Mary Jo O'Rear. The book covers, in depth, the struggles among politicians, local stakeholders, and state and federal authorities as the city attempted to protect itself from hurricanes. Relying on research from regional archives, private collections, and local newspapers, O'Rear touches mainly on urban and political history. At its core, however, the book is a case study; it will appeal most to a South Texas regional audience. The seawall was necessary because of devastating hurricanes in 1919 and 1933. O'Rear writes about several attempted improvements along the coast of the city from 1919 to 1941, when it was mostly complete. Most of the city's plans included general coastal improvements along the Gulf of Mexico and the city's bay, including coastal beautification, bridges, and a large dam project. The author describes instances of grand plans and enthusiasm ending in failure. Throughout, she explores the role of engineers and the movers and shakers of Corpus Christi and South Texas politics. The struggle for the seawall that O'Rear describes was most often over funding. Ambitious plans without bonds, state funding, or federal money left voters both unmoved and without protection from hurricanes. Despite the difficulties, and with World War II on the horizon, boosters prevailed in finding the requisite funding to build a seawall that fit the growing city's needs. O'Rear details the struggles of political, social, and bureaucratic figures over the various plans. She capably builds expectations around each [End Page 350] proposal, only to reveal each plan collapsing at the ballot box or in higher levels of government. Throughout, O'Rear connects the local story to state and national politics. This is particularly intriguing in regards to the crash of 1929 and the Great Depression, and even more notable as she covers the failed attempt of the city to access Public Works Administration (PWA) funds for its seawall. In this section she concludes that the loss of PWA funding might have been a casualty of Franklin Delano Roosevelt's political ambition for a third term, an effort that occurred just as many South Texas politicians were supporting fellow Texan and Vice President John Garner for the presidency. There is surprising detail about the role of the Ku Klux Klan in state and regional politics that adds another layer to an already interesting story. Bigotry was apparent even as sculptor Gutzon Borglum of Mt. Rushmore fame set his sights on the seawall project. His failed bid included a grand beautification project and a controversial (at least to anti-Catholics) statue of Christ. In addition to discussing the power of the Klan, O'Rear effectively details African American voting blocs and their importance in local politics as well as the rise of the League of United Latin American Citizens. Despite O'Rear's detailed political history, which stands on its own as a local and regional narrative, her book would have greater appeal if it were better connected to similar scholarship. She does effectively discuss state and national politics to further the story, but there is no conversation with the larger historiographic context. In particular, this book could have been enhanced through a serious consideration of urban history scholarship. There are ample studies on southern cities, including cities in Texas, which would have connected this case study to a broader field. Joseph Stromberg San Jacinto College, Central Campus Copyright © 2017 The Texas State Historical Association

Habitat restoration incentives for major infrastructure projects

ABSTRACTIncentives for early consideration of habitat restoration measures for major infrastructure projects include public support, streamlined regulatory review, cost savings, and opportunities for innovation. Three case study projects in Washington State are used to demonstrate the benefits of these incentives: the Seattle Department of Transportation Elliott Bay Seawall Project in Seattle; the Washington State Department of Transportation State Route 520 Bridge Replacement and High-occupancy Vehicle Program between Seattle and Bellevue; and the Washington State Department of Ecology/U.S. Bureau of Reclamation Yakima River Basin Integrated Water Resource Management Plan in the Yakima River Basin. In all case studies, project proponents considered habitat restoration early in the design phase, and in some cases, incorporated habitat restoration into the design of the project, allowing them to develop innovative design approaches and partnerships to accommodate multiple stakeholder interests and provide ...

Impact of human activities on changes of ichthyofauna in Dongjin River of Korea in the past 30 years

ABSTRACTIchthyofauna and fish community were investigated at 17 representative stations of the Dongjin River drainage system from spring to fall in 2014. The survey resulted in a list of 53 species belonging to 14 families structured into 4 distinctive parts along the river: uppermost-stream, upper-stream, mid-stream, and lower-stream. Comparison of species lists with 30-year interval exhibited significant decreases in peripheral freshwater fishes, Acheilognathinae, endemic, and indigeneity species, but increases in exotic, epipelagic, and lentic species. Moreover, in the estuary of the Dongjin River drainage system, peripheral freshwater fish species were replaced by pure freshwater fish species due to the Saemangeum sea-wall project. In the upper region of the river, introduced eight alien species from Seomjin River via water diversion tunnels. In the mid-lower region, the construction of floodgates and numerous small weirs caused expansion of lentic water areas, facilitating the spread of problematic exotic species such as Micropterus salmoides, Lepomis macrochirus, and Carassius cuvieri. Also, water deterioration in this region resulted in an increase of tolerant species and a decrease of sensitive and endemic species. Our results suggest that a recovery strategy for a healthy ecosystem in the Dongjin River drainage system should reflect this compartmentalized cause and effect on the changes of icthyofauna.

Prediction of Seawall Settlement Based on a Combined LS-ARIMA Model

The analysis and prediction of seawall settlement are important for seawall engineering maintenance and disaster prevention. Based on the measured seawall settlement time series data, a combined LS-ARIMA forecasting model that fits the trend item by the least-square (LS) method and the season item by the differential self-regression moving average (ARIMA) model was proposed in this study. The monitoring data of one seawall project in Zhejiang, China, is taken as an example to verify the model efficiency and prediction ability. The results show that the prediction accuracy of the new combined LS-ARIMA model was high, with the average relative error (ARE) of 0.23%, much better than that of the traditional ARIMA model (ARE = 0.70%) and the GM (1, 1) model (ARE = 33.43%). This new model has clear physical conception and can effectively improve the prediction accuracy, implying that it can fully tap the dynamic information of monitoring data. The proposed model in this study provides a new research idea for data analysis and prediction of the seawall settlement.

Chemically Aged Asian Dust Particles Proven by Traditional Spot Test and the Most Advanced micro-PIXE

A change in chemical compositions of Asian dust (AD) particles can dramatically alter their optical properties, cloud-forming properties, and health effects. The present study was undertaken to evaluate this aging of AD particles by means of two complementary methods (i.e., the traditional spot test and the most advanced micro-PIXE analytical technique) for single particle analysis. Size-classified particles were sampled at the rural peninsula of Korea (Byunsan, 35.37N; 126.27E) during AD event and non-AD period in 2004. Sulfate was principally enriched on the particles in the size range of 7.65-10.85 μm collected during AD event. The average number fraction of coarse particles (>2.05 μm) containing chloride was 16.2% during AD event. Relatively low particles containing nitrate compared to those containing sulfate and chloride were found in AD event. Micro-PIXE elemental maps indicated that a large number of AD particles were internally mixed with man-made zinc. The highest peaks of EC and OC concentrations were appeared at 0.01-0.43 μm particle aerodynamic diameter. High EC concentration in PM₁ was might be caused by the Saemangeum Seawall Project that was being conducted during our field measurement.

Environmental Reviews and Case Studies: An Interdisciplinary Approach to Environmental Planning and Permitting: City of Seattle Elliott Bay Seawall Project Case Study

Creating and implementing effective tools for navigating the regulatory process is becoming increasingly important to the success of simple to complex projects, particularly those in urban settings. To guide a project through the planning and permitting processes, a skilled and coordinated team equipped with a practical and easily implementable toolkit is required. Tools must be integrated into the design development phase of a project and throughout the permitting phase to adequately meet complex regulatory requirements and begin the project's construction in a timely and cost-effective manner. This article discusses the importance of defining a project, effective project communication, developing an Environmental Approvals Approach (EAA), and proper project scheduling to improve the environmental planning and permitting processes. The City of Seattle's Elliott Bay Seawall Project is presented as a case study of these qualities.

Regional Environmental Governance and Social Capital: A Case Study of Mangyeong River Communities

With a growing concern over the quality of water running downward into the Saemangeum area, the public-private-academic partnership for water quality management called Jeollabuk-do River Restoration was inaugurated in 2011 at the municipal level. On account of the fact that the water quality control as common pool resource faces a social dilemma, non-point source pollution requires cooperation particularly among river community residents supported by the public-private-academic partnership. Drawing upon a survey of the residents of Wanju-gun, Iksan-si, and Gimje-si along the Mangyeong River, we find that, firstly, residents including farmers do not consider diffuse pollution from the agricultural riverbank to be serious. Secondly, the partnership's activities are not sufficiently familiar to residents. Thirdly, residents commonly tend to perceive the current form of regional environmental governance as a managerial model that is led by the local government. Fourthly, residents of Iksan-si and Gimje-si have significantly higher levels of social capital. Lastly, norms of cooperation can be explained by civic associations and regional identity, with more cooperation from Iksansi residents. Several implications of these findings are discussed.Keywords: Quality Control, Non-point Source Pollution, Social Dilemma, Regional Environmental Governance, Social Capital, Cooperative NormsIntroductionSince the biggest land reclamation project in the history of South Korea called Saemangeum Seawall was launched in 1989 as a national project for farmland construction, water demand estimation was the main subject of research during the 1990s. The issue of water quality was first raised in 1996, and thereafter, the central government of South Korea implemented various tasks informed by the Water Quality Improvement Measures Phase 1 (2001-2010). Meanwhile, the government changed the fundamental design of the Saemangeum Seawall project in October 2008 to increase the share of land for non-agricultural purposes such as industry, tourism and leisure, international affairs, science, and research, with the proportion of agricultural land down to 30%. To this end, the government upwardly adjusted the overall level of water quality to grade 4 for the agricultural sector and grade 3 for the urban sector, according to the Comprehensive Development Plan passed in March 2011 by the 6th Saemangeum Committee. Highlighting the priority of the intensive maintenance of two rivers named Mangyeong and Dongjin in the upstream regions of the Saemangeum land, Water Quality Improvement Measures Phase 2 (2011-2020) focuses mainly on how to effectively control pollution from livestock farms, point source pollution, and non-point source pollution. Pertinently, the government began to draw new attention to various diffuse sources of water pollution (e.g., by means of combined sewer overflow facilities and low impact development-based urban planning) in contrast to the earlier approach to water quality management which is disproportionately concerned about livestock wastes and point sources of pollution.The pro-growth regime in leollabuk-do, having consistently alleged that the future of leollabuk-do depends solely on the success of the Saemangeum project, took active steps in response to the idea that a regional agency is required for more collaborative governance of water quality improvement at the provincial level immediately after the central government announced the Water Improvement Measures Phase 2. The leollabuk-do governor took the initiative in arranging the leollabuk-do River Restoration Association in March 2011, which is an enlarged version of the Public-Private-Academic Partnership for Eco-Friendly Mangyeong River (2002-2011). This new association presumes itself as the first case of a municipal-level public-private-academic partnership regarding river restoration since the launch of Koreas local self-governing system. …

High Loading for Air Pollution in the Byunsan Peninsula of Korea by an Interplay of the Saemangeum Project and Winter Monsoon

The wintertime high loading for atmospheric pollutants is certainly expected in the Byunsan Peninsula of Korea because of a great-scale reclamation project having construction of 33 km tidal sea dike impounding an area of over 40,000 ha and long-range transport. The goal of this study is to trace the origin of this wintertime burden for ambient particulate matter (hereafter called “PM”) in the Byunsan Peninsula of Korea. The size-segregated (i.e., cutoff size from 0.01 μm to 4.7 μm) PM sampling was conducted at a ground-based site of Byunsan Peninsula located in the west coast of Korean Peninsula during the height of dike constructing. Data archived in this study are the mass concentrations of ionic, elemental, and carbonic components in size-fractioned PM. The elemental mass of individual submicrometer particles was also analyzed. The sum of 5-source (i.e., elemental carbon, organic materials, inorganic secondary pollutants, crustal matter, and sea-salts) concentrations shows the bimodal distribution (major and minor peaks formed around Dp, 0.65 μm and Dp, 4.7 μm, respectively) by border with 0.19 μm of cutoff size. The concentrations of EC in PM 1.1-0.01 in winter and spring times were 4.62 μg m -3 and 3.74 μg m -3 , respectively. Elemental masses of submicron individual particles are classified into two groups, i.e., the major elements (Cl, Al, Si, S, and P) and the minor trace elements. Cluster analysis differentiated the elements in submicron individual particles into 4-cluster. Among them, three clusters are in agreement with the major (Al, Si, S, and P), minor (Fe, Ca, and K), and trace compositions of coal burning. Meanwhile, Cl classified as an independent cluster has different source profile which was mainly due to the Saemangeum seawall project. Some highly toxic elements (e.g., Cr, Mn, and As (and/or Pb)) were also detected in some part of submicron individual PM. As a consequence, the combination of the Saemangeum project and winter monsoon played a considerable part in the double aggravation of wintertime air pollution in the Byunsan Peninsular.

A Lesson in Managing Political Will, Community Pressure and State Government Constraints at a Local Government Level - Toogoom Seawall Project

A Lesson in Managing Political Will, Community Pressure and State Government Constraints at a Local Government Level - Toogoom Seawall Project

Reviews

International Journal of Nautical ArchaeologyVolume 19, Issue 2 p. 165-179 Reviews First published: May 1990 https://doi.org/10.1111/j.1095-9270.1990.tb00254.xAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract L'épave Grand-Ribaud D., A. HESNARD, M-B. CARRE, M. RIVAL, B. DANGREAUX, M. THINON, M. BLAUSTEIN and M. DUMONTIER The evolution of the wooden ship, BASIL GREENHILL and SAM MANNING The archaeology of the Hasholme logboat (Archaeological Journal 14, 1987: 69-155) MARTIN MILLETT and SEAN McGRAlL History from the Sea, PETER THROCKMORTON An Athenian trireme reconstructed-the British sea trials of Olympias, 1987 J. S. MORRISON and J. F. COATES. Eds Guidelines on Acceptable Standards in Underwater Archaeology MARTIN DEAN The Colonial Merchantmen Susan Constant 1605 (Anatomy of the Ship series) BRIAN LAVERY Ship and Boat Models in Ancient Greece, PAUL FORSYTHE JOHNSTON Local Boats-Fourth International Symposium, on Boat and Ship Archaeology, Porto 1985. OCTAVIO LIXA FILGUEIRAS (Ed.) Ships of the American Revolution and their Models H. HAHN The 20-gun Ship Blandford P. GOODWIN The Eagle-an American Brig on Lake Champlain during the War of 1812 KEVIN J. CRISMAN The Frigate Diana D. WHITE Nelson's Navy-the Ship, Men and Organisations 1793-1815 BRIAN LAVERY A Glossary of Ancient Egyptian Nautical Titles and Terms DILWYN JONES Navy Board Ship Models 1650-1750 JOHN FRANKLIN An Investigation of the Remains of the Paddle Wbeel Steamer John Fraser BESSEL J. VANDENHAZELL Cultural Resources Magnetometer Survey and Testing Great Highway/Ocean Beach Seawall Project, San Francisco, California R. L. GEARHART II Volume19, Issue2May 1990Pages 165-179 RelatedInformation