Shoreline Erosion
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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 -
1 the Influence of Groyne Fields and Other Hard Defences on the Shoreline Configuration
1 The Influence of Groyne Fields and Other Hard Defences on the Shoreline Configuration 2 of Soft Cliff Coastlines 3 4 Sally Brown1*, Max Barton1, Robert J Nicholls1 5 6 1. Faculty of Engineering and the Environment, University of Southampton, 7 University Road, Highfield, Southampton, UK. S017 1BJ. 8 9 * Sally Brown ([email protected], Telephone: +44(0)2380 594796). 10 11 Abstract: Building defences, such as groynes, on eroding soft cliff coastlines alters the 12 sediment budget, changing the shoreline configuration adjacent to defences. On the 13 down-drift side, the coastline is set-back. This is often believed to be caused by increased 14 erosion via the ‘terminal groyne effect’, resulting in rapid land loss. This paper examines 15 whether the terminal groyne effect always occurs down-drift post defence construction 16 (i.e. whether or not the retreat rate increases down-drift) through case study analysis. 17 18 Nine cases were analysed at Holderness and Christchurch Bay, England. Seven out of 19 nine sites experienced an increase in down-drift retreat rates. For the two remaining sites, 20 retreat rates remained constant after construction, probably as a sediment deficit already 21 existed prior to construction or as sediment movement was restricted further down-drift. 22 For these two sites, a set-back still evolved, leading to the erroneous perception that a 23 terminal groyne effect had developed. Additionally, seven of the nine sites developed a 24 set back up-drift of the initial groyne, leading to the defended sections of coast acting as 1 25 a hard headland, inhabiting long-shore drift. -
Integrated Coastal Management Act: National Estuarine Management
26 No.35296 GOVERNMENT GAZETTE, 4 MAY 2012 DEPARTMENT OF ENVIRONMENTAL AFFAIRS No. 336 4 May 2012 NATIONAL ENVIRONMENTAL MANAGEMENT INTEGRA TED COASTAL MANAGEMENT ACT, 2008 (ACT NO. 24 OF 2008) INVITATION TO COMMENT ON THE DRAFT NATIONAL ESTUARINE MANAGEMENT PROTOCOL I, Bomo Edith Edna Molewa, the Minister of Water and Environmental Affairs, hereby in terms of section 33 (2) read with section 53 of the Integrated Coastal Management Act, 2008 (Act No. 24 of 2008) publish for comment the draft National Estuarine Management Protocol. Interested persons and organizations are invited to submit written commen~ on the draft National Estuarine Management Protocol as follows: Written comments may be submitted to the Department by no later than 16h00 on 04 June 2012, by mail, hand, e-mail or telefax transmission. Please note that comments received after the closing date may not be considered. 1.1.1 By mail 1.1.2 By hand 1.1.3 By E-mail Subject: Draft National Subject: Draft National Estuarine Subject: Draft NatiQ!]al Eswarine Estuarine Management Protocol Management Protocol Management Protocol The Deputy Director -General The Deputy Director-General; [email protected] .za Department of Environmental Department of Environmental Affairs: Telephonic enquiries Affairs: Oceans & Coasts; P.O Oceans & Coasts; East Pier 2; East Pier Mr Ayanda Matoti: +27 21 819 2476 Box 52126; V& A Waterfront, Road; V&A Waterfront CAPE TOWN, 8002 CAPETOWN The draft protocol is also available for download from the Departmenfs webs"e, www.environment.gov.za BOMO EDITH EDNA MOLEWA MINISTER OF WATER AND ENVIRONMENTAL AFFAIRS STAATSKOERANT, 4 MEl 2012 No. -
New York State Artificial Reef Plan and Generic Environmental Impact
TABLE OF CONTENTS EXECUTIVE SUMMARY ...................... vi 1. INTRODUCTION .......................1 2. MANAGEMENT ENVIRONMENT ..................4 2.1. HISTORICAL PERSPECTIVE. ..............4 2.2. LOCATION. .....................7 2.3. NATURAL RESOURCES. .................7 2.3.1 Physical Characteristics. ..........7 2.3.2 Living Resources. ............. 11 2.4. HUMAN RESOURCES. ................. 14 2.4.1 Fisheries. ................. 14 2.4.2 Archaeological Resources. ......... 17 2.4.3 Sand and Gravel Mining. .......... 18 2.4.4 Marine Disposal of Waste. ......... 18 2.4.5 Navigation. ................ 18 2.5. ARTIFICIAL REEF RESOURCES. ............ 20 3. GOALS AND OBJECTIVES .................. 26 3.1 GOALS ....................... 26 3.2 OBJECTIVES .................... 26 4. POLICY ......................... 28 4.1 PROGRAM ADMINISTRATION .............. 28 4.1.1 Permits. .................. 29 4.1.2 Materials Donations and Acquisitions. ... 31 4.1.3 Citizen Participation. ........... 33 4.1.4 Liability. ................. 35 4.1.5 Intra/Interagency Coordination. ...... 36 4.1.6 Program Costs and Funding. ......... 38 4.1.7 Research. ................. 40 4.2 DEVELOPMENT GUIDELINES .............. 44 4.2.1 Siting. .................. 44 4.2.2 Materials. ................. 55 4.2.3 Design. .................. 63 4.3 MANAGEMENT .................... 70 4.3.1 Monitoring. ................ 70 4.3.2 Maintenance. ................ 72 4.3.3 Reefs in the Exclusive Economic Zone. ... 74 4.3.4 Special Management Concerns. ........ 76 4.3.41 Estuarine reefs. ........... 76 4.3.42 Mitigation. ............. 77 4.3.43 Fish aggregating devices. ...... 80 i 4.3.44 User group conflicts. ........ 82 4.3.45 Illegal and destructive practices. .. 85 4.4 PLAN REVIEW .................... 88 5. ACTIONS ........................ 89 5.1 ADMINISTRATION .................. 89 5.2 RESEARCH ..................... 89 5.3 DEVELOPMENT .................... 91 5.4 MANAGEMENT .................... 96 6. ENVIRONMENTAL IMPACTS ................. 97 6.1 ECOSYSTEM IMPACTS. -
Broad Beach Restoration Project Coastal Development Permit
Broad Beach Restoration Project Coastal Development Permit Project Description FINAL PREPARED FOR: TRANCAS PROPERTY OWNER’S ASSOCIATION PREPARED BY: 3780 KILROY AIRPORT WAY, SUITE 600, LONG BEACH, CA 90806 JANUARY 2011 JOB NO. 6935 1. INTRODUCTION 2 Broad Beach is located in the northwest portion of the County of Los Angeles and within the City of Malibu. The project area is comprised of the shoreline area fronting approximately 80 homes spanning approximately from Lechuza Point to Trancas Creek. Broad beach has been suffering shoreline erosion over the past 30 plus years, resulting in an almost complete loss of recreation and public access. Public access through dedicated public access ways from Broad Beach Rd. to the beach was rendered impossible during the most severe storms and tidal action over the past few years. The severe erosion problem now threatens private property and dune fields along this stretch of beach. The Trancas Property Owner’s Association (TPOA), representing almost all of the property owners along the Broad Beach shoreline, has elected to address the extensive erosion by privately funding a beach and sand dune restoration project which will not only protect their homes but also restore the beach to its historic grandeur not only for their benefit but for the benefit of the public at large. The Broad Beach restoration project seeks to design, permit, and implement a shoreline restoration program that provides erosion control, property protection, improved recreation and public access opportunities, aesthetics, and dune habitat. Broad Beach Restoration – Project Description FINAL The vicinity and location of the project site are shown below in figure 1. -
Design of Riprap Revetment HEC 11 Metric Version
Design of Riprap Revetment HEC 11 Metric Version Welcome to HEC 11-Design of Riprap Revetment. Table of Contents Preface Tech Doc U.S. - SI Conversions DISCLAIMER: During the editing of this manual for conversion to an electronic format, the intent has been to convert the publication to the metric system while keeping the document as close to the original as possible. The document has undergone editorial update during the conversion process. Archived Table of Contents for HEC 11-Design of Riprap Revetment (Metric) List of Figures List of Tables List of Charts & Forms List of Equations Cover Page : HEC 11-Design of Riprap Revetment (Metric) Chapter 1 : HEC 11 Introduction 1.1 Scope 1.2 Recognition of Erosion Potential 1.3 Erosion Mechanisms and Riprap Failure Modes Chapter 2 : HEC 11 Revetment Types 2.1 Riprap 2.1.1 Rock Riprap 2.1.2 Rubble Riprap 2.2 Wire-Enclosed Rock 2.3 Pre-Cast Concrete Block 2.4 Grouted Rock 2.5 Paved Lining Chapter 3 : HEC 11 Design Concepts 3.1 Design Discharge 3.2 Flow Types 3.3 Section Geometry 3.4 Flow in Channel Bends 3.5 Flow Resistance 3.6 Extent of Protection 3.6.1 Longitudinal Extent 3.6.2 Vertical Extent 3.6.2.1 Design Height 3.6.2.2 Toe Depth Chapter 4 : HEC 11 Design Guidelines for Rock Riprap 4.1 Rock Size Archived 4.1.1 Particle Erosion 4.1.1.1 Design Relationship 4.1.1.2 Application 4.1.2 Wave Erosion 4.1.3 Ice Damage 4.2 Rock Gradation 4.3 Layer Thickness 4.4 Filter Design 4.4.1 Granular Filters 4.4.2 Fabric Filters 4.5 Material Quality 4.6 Edge Treatment 4.7 Construction Chapter 5 : HEC 11 Rock -
Coastal Engineers Are Key Players WHERE C an I Coastal in the Environmental Rehabilitation and GET FURTHER Sustainable Management of Our Coast
Most Australians live close to the coast HoW Do i and our beaches are a significant national BeCoMe A asset. Coastal Engineers are key players WHERE C An i CoAstAl in the environmental rehabilitation and GET FURTHER sustainable management of our coast. ENGINEER? INFORMAt ion? Most Coastal Engineers become Your first step should be to visit specialists in the field after the web site of Engineers Australia. graduating from universities with There you will be able to get A C Areer in a degree in civil or environmental information on a whole range of engineering. This is a 4 year full questions you might have about time course offered by most engineering or engineering courses. CoAstAl major universities in Australia. To If you would like to talk to a qualify as a specialist in coastal Coastal Engineer, contact by mail, engineering requires further post phone, fax or email the Secretary engineering graduate study. This normally of the National Committee on takes the form of formal course Coastal and Ocean Engineering in work programs that require 1 A beach profile being surveyed as Canberra. You will be referred to year of full time study or 2 to part of the COPE field experiment the committee member closest to 3 years of part time study. A at Burleigh, Gold Coast. where you live. The address is: second option is to undertake The National Committee a full time post graduate What employment on Coastal and Ocean Engineering research degree, normally opportunities are Engineers Australia requiring between 2 and 3 years there ? 11 National Circuit to complete. -
City of Dania Beach Chapter 5 Coastal Management Element
City of Dania Beach Chapter 5 Coastal Management Element 9J-5.012 Revised February 2009 COASTAL MANAGEMENT ELEMENT TABLE OF CONTENTS I. INTRODUCTION 1 II. DATA AND ANALYSIS REQUIREMENTS 1 A. Coastal Zone Inventory 2 B. Estuarine conditions 4 C. Natural Disaster Planning 6 III. REQUIREMENTS FOR COASTAL MANAGEMENT 10 GOALS, OBJECTIVES AND POLICIES TABLES I. Coastal Zone – Existing Land Use 1997 16 II. Coastal Zone – Vacant Land Use 1997 17 i Coastal Management Element City of Dania Beach I. INTRODUCTION The purpose of the Coastal Management Element is to provide a plan for the protection of human life and coastal resources and to limit public expenditures in areas that are subject to natural disaster. II. DATA AND ANALYSIS REQUIREMENTS The coastal zone within the City of Dania Beach (see Natural Resources Map) is considered to be that area east of U.S.1 area consisting of approximately 1,300 acres. This includes the small portion of the City on the beach approximately two (2) miles from the main portion of the City. The high hazard area is located east of Southeast 5th Avenue and includes Dania Beach. A. Coastal Zone Inventory Table I identifies the existing land uses within the coastal zone utilizing the same land use hierarchy identified in the Land Use Data Section of the Land Use Element. As noted, the land uses occurring within the coastal zone provide for a mix of uses including various intensities of residential, commercial, industrial, park and recreational, and community facilities types. In addition, approximately 136 acres are vacant. Table II identifies the vacant land within the coastal high hazard zone by future land use type utilizing the same hierarchy identified in the Future Land Use Element. -
Overview of Connecticut's Coastal Management Program
Overview of Connecticut’s Coastal Management Program Coastal Management in Connecticut - What is it all about? We all need Connecticut's coast for all of the services it provides for recreation, tourism, commercial activities, and enjoyment of its resources, all of which benefit the state economically. We all use our coast in one way or another, so we all have to work together to ensure it remains available for future generations. That is where coastal management comes in to guide activities taking place where the land meets the sea. In the case of Connecticut, our emphasis is on balancing protection of the fragile coastal resources of the Long Island Sound ecosystem with sustainable economic uses of the shoreline. Coastal management in Connecticut is a comprehensive, cooperative program that functions at all levels of government. Connecticut's Coastal Management Program is administered by the Department of Energy and Environmental Protection (DEEP) and is approved by the National Oceanic and Atmospheric Administration (NOAA) under the federal Coastal Zone Management Act. Under the statutory umbrella of Connecticut’s Coastal Management Act (CCMA), enacted in 1980, the Coastal Management Program ensures balanced growth along the coast, restores coastal habitat, improves public access, protects water-dependent uses, public trust waters and submerged lands, and promotes harbor management and facilitates research. The Coastal Management Program also regulates work in tidal, coastal, and navigable waters and tidal wetlands under CCMA (Sections 22a-90 – 22a-112 of the Connecticut General Statutes (CGS)), the Structures Dredging and Fill statutes (CGS Sections 22a-359 – 22a-363f) and the Tidal Wetlands Act (CGS Sections 22a-28 – 22a-35). -
Design of Riprap Revetment
, 1-) r-) P .A) C? F Hydraulic Engineering Circular No. 11 U.S. Department of Transportation Federal Highway Publication Na FHWA-lP-89-016 Administration March 1989 Design of Riprap Revetment Research, Development, and-T"echnology Turner-Fairbank Highwayffesewch Center 6300 Gec rg3#own Pike McLean, V'wffiniae=-2296 WATER RESOURCES ' RESEARCH LABORATORY J OFFICIAL FILE COPY Technical Report Documentation Page 1. Report No. 2. Government Accession No. 3. Recipient's Catalog No. FHWA-IP-89-016 HEC-11 4, Title and Subtitle S. Report Dote March 1989 DESIGN OF RIPRAP REVETMENT 6. Performing Organization Code 8. Performing Organization Report No. 7, Aurhorrs) Scott A. Brown, Eric S. Clyde 9, Performing Organization Name and Address 10. Work Unit No. (TRAIS) Sutron Corporation 3D9C0033 2190 Fox Mill Road 11. Contract or Grant No. Herndon, VA 22071 DTFH61-85-C-00123 13. Type of Report and Period Covered 12. Sponsoring Agency Name and Address Office of Implementation, HRT-10 Final Report Federal Highway Administration Mar. 1986 - Sept. 1988 6200 Georgetown Pike McLean, VA 22101 14. Sponsoring Agency Code 15. Supplementary Notes Project Manager: Thomas Krylowski Technical Assistants: Philip L. Thompson, Dennis L. Richards, J. Sterling Jones 16. Abstract This revised version of Hydraulic Engineering Circular No. 11 (HEC-11), represents major revisions to the earlier (1967) edition of HEC-11. Recent research findings and revised design procedures have been incorporated. The manual has been expanded into a comprehensive design publication. The revised manual includes discussions on recognizing erosion potential, erosion mechanisms and riprap failure modes, riprap types including rock riprap, rubble riprap, gabions, preformed blocks, grouted rock, and paved linings. -
The Study of the Coastal Management Criteria Based on Risk Assessmeant: a Case Study on Yunlin Coast, Taiwan
water Article The Study of the Coastal Management Criteria Based on Risk Assessmeant: A Case Study on Yunlin Coast, Taiwan Wei-Po Huang 1,2,* ID , Jui-Chan Hsu 1, Chun-Shen Chen 3 and Chun-Jhen Ye 1 1 Department of Harbor and River Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan; [email protected] (J.-C.H.); [email protected] (C.-J.Y.) 2 Center of Excellence for Ocean Engineering, National Taiwan Ocean University, Keelung 20224, Taiwan 3 Water Resources Planning Institute, Water Resources Agency, Ministry of Economic Affairs, Taichung 41350, Taiwan; [email protected] * Correspondence: [email protected]; Tel.: +886-2-2462-2192 (ext. 6154) Received: 18 June 2018; Accepted: 25 July 2018; Published: 26 July 2018 Abstract: In this study, we used the natural and anthropogenic characteristics of a coastal region to generate risk maps showing vulnerability and potential hazards, and proposed design criteria for coastal defense and land use for the various kinds of risks faced. The Yunlin coast, a first-level protection area in mid-west Taiwan, was then used as an example to illustrate the proposed design criteria. The safety of the present coastal defenses and land use of the Yunlin coastal area was assessed, and coastal protection measures for hazard prevention were proposed based on the generated risk map. The results can be informative for future coastal management and the promotion of sustainable development of coastal zones. Keywords: coastal defense; risk maps; non-engineering measure; coastal vulnerability 1. Introduction Like most developing countries, Taiwan’s coast has been alternatively used for settlement, agriculture, trade, industry, and recreation without careful and thorough planning in the development stage since 70s. -
Technical Evaluation of the Performance of River Groynes Installed in Sezar and Kashkan Rivers, Lorestan, Iran
J. Appl. Environ. Biol. Sci. , 5(1 1S)258 -268 , 2015 ISSN: 2090-4274 Journal of Applied Environmental © 2015, TextRoad Publication and Biological Sciences www.textroad.com Technical Evaluation of the Performance of River Groynes Installed in Sezar and Kashkan Rivers, Lorestan, Iran Farzad Mohammadi*1, Nazanin Mohammadi 2 1 Department of Water Sciences and Engineering, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran 2 Department of Architecture and Urbanism, Shahid Beheshti University, Tehran, Iran Received: May 14, 2015 Accepted: August 27, 2015 ABSTRACT In this paper we aim to investigate the performance of River Groynes that have installed near the banks of Kashkan and Sezar rivers in Lorestan province of Iran. For this purpose we performed field studies, and collected information about these rivers. To predict depth of scour at groynes we used equations proposed by Khosla (1953), Garde et al (1961), Niel (1973), Zaghloul(1983), Ahmad (1953), Gill (1972) and Liu (1961).Our results showed that The groyne constructed on both rivers had performed their performance properly in spite of their design and application. The spaces between groynes and their length had been determined suitably in Sezar river, but it was not suitable in Kashkan river. Using poor materials, poor pier foundation, and improper lateral wall angle were their negative aspects Considering the armoring phenomenon, the river bed has reached a proper balance, and therefore, river protection and thus, erosion between two groynes was conducted properly. KEYWORDS: Kashkan River, Sezar River, river groyne, performance, scour depth, flow pattern, groyne- fields 1. INTRODUCTION Rivers are continuously changing under the influence of various factors including geology and topology of the region, properties of alluvial deposits in floodplain, hydrologic features of the basin, hydraulic condition of the flow, and human exploitations.