Programme and Book of Abstracts, a Receipt of the Registration Fee, and Souvenirs
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GEOTEXTILE TUBE and GABION ARMOURED SEAWALL for COASTAL PROTECTION an ALTERNATIVE by S Sherlin Prem Nishold1, Ranganathan Sundaravadivelu 2*, Nilanjan Saha3
PIANC-World Congress Panama City, Panama 2018 GEOTEXTILE TUBE AND GABION ARMOURED SEAWALL FOR COASTAL PROTECTION AN ALTERNATIVE by S Sherlin Prem Nishold1, Ranganathan Sundaravadivelu 2*, Nilanjan Saha3 ABSTRACT The present study deals with a site-specific innovative solution executed in the northeast coastline of Odisha in India. The retarded embankment which had been maintained yearly by traditional means of ‘bullah piling’ and sandbags, proved ineffective and got washed away for a stretch of 350 meters in 2011. About the site condition, it is required to design an efficient coastal protection system prevailing to a low soil bearing capacity and continuously exposed to tides and waves. The erosion of existing embankment at Pentha ( Odisha ) has necessitated the construction of a retarded embankment. Conventional hard engineered materials for coastal protection are more expensive since they are not readily available near to the site. Moreover, they have not been found suitable for prevailing in in-situ marine environment and soil condition. Geosynthetics are innovative solutions for coastal erosion and protection are cheap, quickly installable when compared to other materials and methods. Therefore, a geotextile tube seawall was designed and built for a length of 505 m as soft coastal protection structure. A scaled model (1:10) study of geotextile tube configurations with and without gabion box structure is examined for the better understanding of hydrodynamic characteristics for such configurations. The scaled model in the mentioned configuration was constructed using woven geotextile fabric as geo tubes. The gabion box was made up of eco-friendly polypropylene tar-coated rope and consists of small rubble stones which increase the porosity when compared to the conventional monolithic rubble mound. -
Linktm Gabions and Mattresses Design Booklet
LinkTM Gabions and Mattresses Design Booklet www.globalsynthetics.com.au Australian Company - Global Expertise Contents 1. Introduction to Link Gabions and Mattresses ................................................... 1 1.1 Brief history ...............................................................................................................................1 1.2 Applications ..............................................................................................................................1 1.3 Features of woven mesh Link Gabion and Mattress structures ...............................................2 1.4 Product characteristics of Link Gabions and Mattresses .........................................................2 2. Link Gabions and Mattresses .............................................................................. 4 2.1 Types of Link Gabions and Mattresses .....................................................................................4 2.2 General specification for Link Gabions, Link Mattresses and Link netting...............................4 2.3 Standard sizes of Link Gabions, Mattresses and Netting ........................................................6 2.4 Durability of Link Gabions, Link Mattresses and Link Netting ..................................................7 2.5 Geotextile filter specification ....................................................................................................7 2.6 Rock infill specification .............................................................................................................8 -
GEOTEXTILE TUBE and GABION ARMOURED SEAWALL for COASTAL PROTECTION an ALTERNATIVE by S Sherlin Prem Nishold1, Ranganathan Sundaravadivelu 2*, Nilanjan Saha3
PIANC-World Congress Panama City, Panama 2018 GEOTEXTILE TUBE AND GABION ARMOURED SEAWALL FOR COASTAL PROTECTION AN ALTERNATIVE by S Sherlin Prem Nishold1, Ranganathan Sundaravadivelu 2*, Nilanjan Saha3 ABSTRACT The present study deals with a site-specific innovative solution executed in the northeast coastline of Odisha in India. The retarded embankment which had been maintained yearly by traditional means of ‘bullah piling’ and sandbags, proved ineffective and got washed away for a stretch of 350 meters in 2011. About the site condition, it is required to design an efficient coastal protection system prevailing to a low soil bearing capacity and continuously exposed to tides and waves. The erosion of existing embankment at Pentha ( Odisha ) has necessitated the construction of a retarded embankment. Conventional hard engineered materials for coastal protection are more expensive since they are not readily available near to the site. Moreover, they have not been found suitable for prevailing in in-situ marine environment and soil condition. Geosynthetics are innovative solutions for coastal erosion and protection are cheap, quickly installable when compared to other materials and methods. Therefore, a geotextile tube seawall was designed and built for a length of 505 m as soft coastal protection structure. A scaled model (1:10) study of geotextile tube configurations with and without gabion box structure is examined for the better understanding of hydrodynamic characteristics for such configurations. The scaled model in the mentioned configuration was constructed using woven geotextile fabric as geo tubes. The gabion box was made up of eco-friendly polypropylene tar-coated rope and consists of small rubble stones which increase the porosity when compared to the conventional monolithic rubble mound. -
Chapter 213 the Impacts of Shoreline Protection
CHAPTER 213 THE IMPACTS OF SHORELINE PROTECTION STRUCTURES ON BEACHES ALONG MONTEREY BAY, CALB^ORNIA GaryB. Griggs* James F. Tait* Katherine Scott* Abstract As a result of severe coastal storm damage in recent years along the California coast and the continuation of development and redevelopment in hazard prone oceanfront areas, large numbers of coastal protection structures have been built. This same trend has been observed on the Atlantic and Gulf coasts as well. At present, fully 12%, or 130 miles of California's 1100 miles of shoreline have been armored. As the number of structures and their coastal frontage has increased, concern along the California coast and elsewhere has arisen in regard to the impacts of these protective structures on the adjacent beaches. Three Atlantic coast states (Maine, New Jersey, and North Carolina) have responded to this concern by establishing state-level policy which prohibits construction of any new "hard" protective structures. Although considerable laboratory scale research has been carried out on this problem, field work has been extremely limited. A study along the central California coast was initiated in order to resolve some of the most critical questions regarding the impacts of protection structures on beaches. Based on 4 years of precise, biweekly, shore- based surveys in the vicinity of different types of seawalls along the shoreline of northern Monterey Bay along the central California coast, some consistent beach changes have been documented. All of the changes observed to date have been seasonal and are best developed in the fall and winter months during the transition from summer swell to winter storm conditions. -
HODS of COMPUTING SEDIMENTATION in LAKES and RESERVOIRS a Contribution to the International Hydrological Programme, IHP - II Project A
2 14. 8 5 M E HODS OF COMPUTING SEDIMENTATION IN LAKES AND RESERVOIRS A contribution to the International Hydrological Programme, IHP - II Project A. 2.6.1 Panel Stevan Bruk, Rapporteur Unesco, Paris lO:£/q.C?SSrf& llsn-. ^2>l Unesco, Paris ~-F::\r>Y J^TCRX'AT.'OfvAL REFERENCE C7.X~RF: ; aAAi. vAT::v.'v ;;;;r/ METHODS OF COMPUTING SEDIMENTATION IN LAKES AND RESERVOIRS A contribution to the International Hydrological Programme, I HP - II Project A. 2.6.1 Panel r- ••••' — - -,-•• „ _ Stevan Bruk, Rapporteur '; t^'^S-^' -^::V WA'r--R SUPPLY | A.\U b -.' -n„. ,,._.,, ,....•"""••" ' ^s Hague .SKI 3iS£ February 1985 The Yugoslav National Committee for the International Hydrological Programme contributed to the printing Of this book Unesco'1985 Printed by the Printing Department of the Jaroslav Cemi Institute for the Development of Water Resources P.O. Box 530,11000 Belgrade, Yugoslavia Preface Although the total amount of water on earth is generally assumed to have Remained virtually constant, the rapid growth of population, together with the extension of irrigated agriculture and industrial development, are stressing the quantity and quality aspects of the natural system. Because of the increasing problems, man has begun to realize that he can no longer follow a "use and discard" philosophy ~ either with water resources or any other natural resources. Asa result, the need for a consistent policy of rational management of water resources has become evident. Rational water management, however, should be founded upon a thorough understanding of water availability and movement. Thus, as a contribution to the solution of the worlds water problems, Unesco, in 1965, began the first world-wide programme of studies of the hydrological cycle - the International Hydrological Decade (IHD). -
Geotechnical Aspects of Seawall Stability with Climate Change
GEOTECHNICAL ASPECTS OF SEAWALL STABILITY WITH CLIMATE CHANGE Lex Nielsen WorleyParsons [email protected] Agustria Salim Pells Sullivan Meynink Doug Lord Coastal Environment Geoff Withycombe Sydney Coastal Councils Group Ian Armstrong Sydney Coastal Councils Group Introduction Existing seawalls and protection structures exist at many locations around the Australian coast where construction details are unknown and the capacity of the structures to withstand storms has not been verified. Seawall asset owners and managers (usually Local Councils) are faced with determining development applications in areas protected by such structures. Often, the responsibility, ownership and liability arising from these structures are not clear, with many structures constructed entirely or in part on Public Land. Frequently, there is conflict between the coastal managers and the community who have varying impressions of their effectiveness in providing protection and their impact on the public beach. This project has developed methods whereby the efficacy of existing seawalls may be determined. The project was undertaken by the Sydney Coastal Councils Group (SCCG) with funding provided by the Commonwealth Department of Climate Change and Energy Efficiency (DCCEE) through a Climate Adaptation Pathways (CAP) grant. The project was overseen by a National Reference Group comprising expertise from local government, state government, universities with coastal management expertise and industry specialists. Key elements of the project were as follows: Literature review of existing seawall types, remote sensing techniques, options for upgrading, certification requirements - Water Research Laboratory (WRL), University of NSW (UNSW). Geotechnical assessment of structure types and common failure modes - WorleyParsons. Economic aspects of the decision making process - Bond University under the direction of the Centre for Coastal Management (CCM) at Griffith University (GU). -
Harbor Protection Through Construction of Artificial Submerged Reefs
Harbor Protection through Construction of Artificial Submerged Reefs Amarjit Singh, Vallam Sundar, Enrique Alvarez, Roberto Porro, Michael Foley (www.hawaii.gov) 2 Outline • Background of Artificial Reefs • Multi-Purpose Artificial Submerged Reefs (MPASRs) ▫ Coastline Protection ▫ Harbor Protection • MPASR Concept for Kahului Harbor, Maui ▫ Situation ▫ Proposed Solution • Summary 3 Background First documented First specifically Artificial reefs in First artificial reef Artificial reefs in artificial reefs in designed artificial Hawaii– concrete/tire in Hawaii Hawaii – concrete Z- U.S. reefs in U.S. modules modules 1830’s 1961 1970’s 1985-1991 1991- Present • Uses • Materials ▫ Create Marine Habitat ▫ Rocks; Shells ▫ Enhance Fishing ▫ Trees ▫ Recreational Diving Sites ▫ Concrete Debris ▫ Surfing Enhancement ▫ Ships; Car bodies ▫ Coastal Protection ▫ Designed concrete modules ▫ Geosynthetic Materials 4 Multi-Purpose Artificial Submerged Reefs (MPASRs) Specifically designed artificial reef which can provide: • Coastline Protection or Harbor Protection ▫ Can help restore natural beach dynamics by preventing erosion ▫ Can reduce wave energy transmitted to harbor entrances • Marine Habitat Enhancement ▫ Can provide environment for coral growth and habitat fish and other marine species. ▫ Coral can be transplanted to initiate/accelerate coral growth • Recreational Uses ▫ Surfing enhancement: can provide surfable breaking waves where none exist ▫ Diving/Snorkeling: can provide site for recreational diving and snorkeling 5 MPASRs as Coastal Protection Wave Transmission: MPASRs can reduce wave energy transmitted to shoreline. Kt = Ht/Hi K = H /H t t i Breakwater K = wave transmission t Seabed coefficient, (Pilarczyk 2003) Ht= transmitted wave height shoreward of structure Hi = incident wave height seaward of structure. 6 MPASRs as Coastal Protection • Wave Refraction: MPASR causes wave refraction around the reef, focusing wave energy in a different direction. -
Storms and Coastal Defences at Chiswell This Booklet Provides Information About
storms and coastal defences at chiswell this booklet provides information about: • How Chesil Beach and the Fleet Lagoon formed and how it has What is this changed over the last 100 years • Why coastal defences were built at Chiswell and how they work • The causes and impacts of the worst storms in a generation booklet that occurred over the winter 2013 / 14 • What will happen in the future Chesil Beach has considerable scientific about? significance and has been widely studied. The sheer size of the beach and the varying size and shape of the beach material are just some of the reasons why this beach is of worldwide interest and importance. Chesil Beach is an 18 mile long shingle bank that stretches north-west from Portland to West Bay. It is mostly made up of chert and flint pebbles that vary in size along the beach with the larger, smoother pebbles towards the Portland end. The range of shapes and sizes is thought to be a result of the natural sorting process of the sea. The southern part of the beach towards Portland shelves steeply into the sea and continues below sea level, only levelling off at 18m depth. It is slightly shallower at the western end where it levels off at a depth of 11m. This is mirrored above sea level where typically the shingle ridge is 13m high at Portland and 4m high at West Bay. For 8 miles Chesil Beach is separated from the land by the Fleet lagoon - a shallow stretch of water up to 5m deep. -
Grading of Beach Water Quality Released
Grading of beach water quality released The Environmental Protection Department (EPD) today (August 27) released the latest grading of water quality for 39 gazetted beaches (see Note 1) and one non-gazetted beach (i.e. Discovery Bay, see Note 2). Twenty-two beaches were rated as Good (Grade 1), 15 as Fair (Grade 2) and three as Poor (Grade 3). Grade 1 beaches are: Cafeteria New Beach Repulse Bay Beach* Cheung Chau Tung Wan Beach* Shek O Beach* Chung Hom Kok Beach Silverstrand Beach* Clear Water Bay First Beach South Bay Beach Clear Water Bay Second Beach* St Stephen's Beach Discovery Bay Stanley Main Beach* Golden Beach* Tai Po Lung Mei Beach* Hap Mun Bay Beach* Tong Fuk Beach Hung Shing Yeh Beach* Trio Beach Kiu Tsui Beach Turtle Cove Beach Lo So Shing Beach Upper Cheung Sha Beach Grade 2 beaches are: Anglers' Beach Kwun Yam Beach Approach Beach Lido Beach* Cafeteria Old Beach Lower Cheung Sha Beach Casam Beach* Ma Wan Tung Wan Beach* Castle Peak Beach Middle Bay Beach Deep Water Bay Beach* Pui O Beach* Hoi Mei Wan Beach Ting Kau Beach Kadoorie Beach Grade 3 beaches are: Big Wave Bay Beach* Silver Mine Bay Beach* Butterfly Beach* Compared with the grading released last week, Cheung Chau Tung Wan Beach, Clear Water Bay Second Beach, Kiu Tsui Beach, Silverstrand Beach and Tai Po Lung Mei Beach have been upgraded from Grade 2 to Grade 1; Casam Beach and Ting Kau Beach from Grade 3 to Grade 2. Middle Bay Beach has been changed from Grade 1 to Grade 2. -
Grading of Beach Water Quality Released
Grading of beach water quality released The Environmental Protection Department (EPD) today (September 18) released the latest grading of water quality for 38 gazetted beaches (see Note 1) and one non-gazetted beach (i.e. Discovery Bay, see Note 2). Seventeen beaches were rated as Good (Grade 1), 21 as Fair (Grade 2) and one as Poor (Grade 3). Grade 1 beaches are: Cheung Chau Tung Wan Beach Shek O Beach Chung Hom Kok Beach South Bay Beach Clear Water Bay Second Beach St Stephen's Beach Hap Mun Bay Beach Stanley Main Beach Hung Shing Yeh Beach Tong Fuk Beach Kwun Yam Beach Trio Beach Lo So Shing Beach Turtle Cove Beach Lower Cheung Sha Beach Upper Cheung Sha Beach Repulse Bay Beach Grade 2 beaches are: Anglers' Beach Hoi Mei Wan Beach Big Wave Bay Beach Kadoorie Beach Butterfly Beach Kiu Tsui Beach Cafeteria New Beach Lido Beach Cafeteria Old Beach Ma Wan Tung Wan Beach Casam Beach Middle Bay Beach Castle Peak Beach Pui O Beach Clear Water Bay First Beach Silver Mine Bay Beach Deep Water Bay Beach Silverstrand Beach Discovery Bay Ting Kau Beach Golden Beach Grade 3 beach is: Approach Beach Under the present grading system, beaches are classified into four grades, namely Good (Grade 1), Fair (Grade 2), Poor (Grade 3) and Very Poor (Grade 4), according to the level of E. coli in the water. Grades are calculated on the basis of the geometric mean of the E. coli counts on the five most recent sampling occasions. A summary of beach grades is published weekly before the weekend. -
Simulation and Experimental Studies of a Multi-Tubular Floating Sea Wave Damper
energies Article Simulation and Experimental Studies of a Multi-Tubular Floating Sea Wave Damper Leszek Chybowski ID , Zenon Grz ˛adzieland Katarzyna Gawdzi ´nska* ID Faculty of Marine Engineering, Maritime University of Szczecin, 70-500 Szczecin, Poland; [email protected] (L.C.); [email protected] (Z.G.) * Correspondence: [email protected]; Tel.: +48-914-809-941 Received: 26 March 2018; Accepted: 11 April 2018; Published: 20 April 2018 Abstract: This article explores the issue of shore protection from sea waves and has presented the main methods used for coastal protection. It discusses the construction and operation of the multi-tubular floating sea wave damper that has been developed at the Maritime University of Szczecin by Professor Bolesław Ku´zniewski.This paper presents the results of the research project aimed at creating and examining a prototype of the device. The research aimed to confirm the two hypotheses: “the largest damping force should occur when the damping units are placed at an optimal distance equal to half the length of the wave to be damped” and “a compensation of the horizontal forces caused by the rippling of water should occur in the damping device”. Simulation studies of the behaviour of the device’s buoyancy elements when floating on waves were performed using the ANSYS AQWAWB and AQWA software. The buoyancy components were modelled as TUBE elements with a diameter of 0.11 m and a length of 1.5 m and as triangular and square surface elements. The results of the experimental research and the computer simulation of the operation of the prototype device have also been presented. -
The Hong Kong Cleanup 2012 Report
The Hong Kong Cleanup 2012 Report .com Brought to you by: Presented by: Ecovision Asia Date: December 21st, 2012 Ecovision Asia | Level 2, 6 On Wo Lane, Hong Kong | T +852 2868 5585 | F +822 2868 5583 HKcleanup.org | Ecozine.com Table of Contents Message from Founders: Lisa Christensen and Nissa Marion 3 A word from our Celebrity Ambassadors 4 Executive Summary 5 The 2012 Hong Kong Cleanup 6 1. Introduction 6 2. The Issue of Trash 8 3. Timeline 11 4. A Year-Round Campaign 11 5. Three ways to participate 12 6. Official Kickoff 13 7. Free Public Eco Education Seminars 13 8. Team Registration & Participation 14 9. Materials 15 10. Merchandise 15 11. Data Collection 16 12. Awards Ceremony 16 13. Hong Kong Cleanup Exhibition 17 15. Global Partners 24 16. Local Partners 25 17. Plastic Pellet Patrol 29 18. Team Highlights 31 2012 Results and Findings 34 1. Individual Challenges 34 2. Hong Kong Cleanup Overall Findings 35 3. Data Highlights 38 4. Solutions and Recommendations 39 5. Taking Action: What You Can Do 40 Appendix 1: Team Participation 41 Appendix 2: 2012 Challenge Winners 45 1. Coastal Cleanup Challenge 45 2. City Cleanup Challenge 46 3. Country Cleanup Challenge 47 Appendix 3: Acknowledgments 48 Appendix 3: Sources 49 Appendix 4: About Us 49 2 Message from Founders: Lisa Christensen and Nissa Marion At the beginning of 2012, we made the choice to enact a vision: to expand the Hong Kong International Coastal Cleanup inland, beyond shorelines, to include country parks and urban environments. This bold move aimed to allow greater participation, with more ways to get involved, while bringing home the message that the trash in the ocean starts right here at home.