Homeowners Guide for Flood, Debris Flow, and Erosion Control How Storms Can Effect Your Property
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Protection Against Wave-Based Erosion
Protection against Wavebased Erosion The guidelines below address the elements of shore structure design common to nearly all erosion control structures subject to direct wave action and run-up. 1. Minimize the extent waterward. Erosion control structures should be designed with the smallest waterward footprint possible. This minimizes the occupation of the lake bottom, limits habitat loss and usually results in a lower cost to construct the project. In the case of stone revetments, the crest width should be only as wide as necessary for a stable structure. In general, the revetment should follow the cross-section of the bluff or dune and be located as close to the bluff or dune as possible. For seawalls, the distance that the structure extends waterward of the upland must be minimized. If the seawall height is appropriately designed to prevent the majority of overtopping, there is no engineering rationale based only on erosion control which justifies extending a seawall out into the water. 2. Minimize the impacts to adjacent properties. The design of the structure must consider the potential for damaging adjacent property. Projects designed to extend waterward of the shore will affect the movement of littoral material, reducing the overall beach forming process which in turn may cause accelerated erosion on adjacent or down-drift properties with less protective beaches. Seawalls, (and to a lesser extent, stone revetments) change the direction (wave reflection) and intensity of wave energy along the shore. Wave reflection can cause an increase in the total energy at the seawall or revetment interface with the water, allowing sand and gravel to remain suspended in the water, which will usually prevent formation of a beach directly fronting the structure. -
Shoreline Management in Chesapeake Bay C
Shoreline Management In Chesapeake Bay C. S. Hardaway, Jr. and R. J. Byrne Virginia Institute of Marine Science College of William and Mary 1 Cover Photo: Drummond Field, Installed 1985, James River, James City County, Virginia. This publication is available for $10.00 from: Sea Grant Communications Virginia Institute of Marine Science P. O. Box 1346 Gloucester Point, VA 23062 Special Report in Applied Marine Science and Ocean Engineering Number 356 Virginia Sea Grant Publication VSG-99-11 October 1999 Funding and support for this report were provided by... Virginia Institute of Marine Science Virginia Sea Grant College Program Sea Grant Contract # NA56RG0141 Virginia Coastal Resource Management Program NA470Z0287 WILLIAM& MARY Shoreline Management In Chesapeake Bay By C. Scott Hardaway, Jr. and Robert J. Byrne Virginia Institute of Marine Science College of William and Mary Gloucester Point, Virginia 23062 1999 4 Table of Contents Preface......................................................................................7 Shoreline Evolution ................................................................8 Shoreline Processes ..............................................................16 Wave Climate .......................................................................16 Shoreline Erosion .................................................................20 Reach Assessment ................................................................23 Shoreline Management Strategies ......................................24 Bulkheads and Seawalls -
Control of Erosion on Construction Sites
624 RAN:c COf'<-\ I A LIBRARY PLANNING AND EP CONTROL OF EROSION ON CONSTRUCTION SITES By Michael J. Ransom CONTENTS INTRODUCTION 7 1 CONTROL OF EROSION ON CONSTRUCTION SITES 9 1.1 General 9 1 .2 How Does Erosion Occur? 9 2. BENEFITS OF EROSION CONTROL ON CONSTRUCTION SITES 11 3. PRINCIPLES OF EROSION CONTROL ON CONSTRUCTION SITES 12 3.1 Planning Phase Controls 12 3.2 Design and Construction Phase Controls 13 3.3 Maintenance Phase Controls 14 4. CONSTRUCTION SITE PRACTICE 15 4.1 Initial Clearing and Site Preparation 15 4.2 Access Around the Site 16 4.3 Drainage 19 4.4 Stockpiles and Spoil Dumps 30 4.5 Vegetation and Reclamation 31 4.6 Batters 34 4.7 SedimentTrapping 37 APPENDIX 1. Construction Supervisor's Check List 46 APPENDIX 2. Conservation, Forestsand Lands 47 Regional Offices REFERENCES 48 f l � t. tf.· . ' f•-':·.· . · . I . ACKNOWLEDGMENTS (First Edition) A number of people have assisted in the preparation of this booklet, both in technical advice and in reviewing the text. Particular thanks are due to a number of officers of the Soil Conservation Authority, particularly Mr. Graydon Findlay, the Authority's Chief Engineer. Also, the assistance of the following is greatly appreciated: Mr. John Mapson, State Rivers and Water Supply Commission, Messrs. Cliff Lawton and Peter Nash of the Road Construction Authority, and Mr. Don Thomson and his staff of the Dandenong Valley Authority who assisted greatly in providing technical input and advice on the presentation of the booklet. INTRODUCTION Each year, an increasing area of agricultural and open land is converted to urban use for houses, shopping centres, factories, roads, schools and other facilities. -
Erosion-1.Pdf
R E S O U R C E L I B R A R Y E N C Y C L O P E D I C E N T RY Erosion Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water. G R A D E S 6 - 12+ S U B J E C T S Earth Science, Geology, Geography, Physical Geography C O N T E N T S 9 Images For the complete encyclopedic entry with media resources, visit: http://www.nationalgeographic.org/encyclopedia/erosion/ Erosion is the geological process in which earthen materials are worn away and transported by natural forces such as wind or water. A similar process, weathering, breaks down or dissolves rock, but does not involve movement. Erosion is the opposite of deposition, the geological process in which earthen materials are deposited, or built up, on a landform. Most erosion is performed by liquid water, wind, or ice (usually in the form of a glacier). If the wind is dusty, or water or glacial ice is muddy, erosion is taking place. The brown color indicates that bits of rock and soil are suspended in the fluid (air or water) and being transported from one place to another. This transported material is called sediment. Physical Erosion Physical erosion describes the process of rocks changing their physical properties without changing their basic chemical composition. Physical erosion often causes rocks to get smaller or smoother. Rocks eroded through physical erosion often form clastic sediments. -
Watershed Science
Watershed Science This lesson is part of an ongoing monthly series that encourages young adults to learn about the environment through hands-on activities. These activities are recommended for ages 8+ and are designed using materials that most households have on-hand. Where does water come from? Why is it important? What is a watershed? This month, we will explore how water moves on Earth, what a watershed is and why it’s important, and find out what watershed area we live in! Did you know that the water we use today is the same water the dinosaurs used! So how does it move around the earth? Let's find out by making our own model of the water cycle! Model Water Cycle Materials: ❏ 1-quart sized freezer bag ❏ 1 permanent marker ❏ 1 cup of water ❏ Tape *recommend using clear packing tape ❏ Blue Food Coloring *recommended but not necessary ❏ Nature Journal (Click here for activity sheet) Directions: 1. Using a permanent marker, draw a water scene on the outside of the bag including water/waves at the bottom of the bag and clouds and the sun at the top of the bag. 2. Fill the measuring cup with 1 cup of water and add 2 drops of blue food coloring. Carefully stir in food coloring. 3. Slowly pour the water into the freezer bag and seal the bag completely. 4. Tape bag to a sunny window using tape. Choose a window that gets the most sunlight during the day. 5. Check on the bag during the day/several times a day and observe the changes. -
Floods in Nebraska on Small Drainage Areas Magnitude and Frequency
Floods in Nebraska on Small Drainage Areas Magnitude and Frequency GEOLOGICAL SURVEY CIRCULAR 45S Floods in Nebraska on Small Drainage Areas, Magnitude and Frequency By Emil W. Beckman and Norman E. Hutchison Prepared in cooperation with the Nebraska Department of Roads GEOLOGICAL SURVEY CIRCULAR 458 Washington 7962 United States Department of the Interior STEW ART L. UDALL, SECRETARY Geological Survey THOMAS B. NOLAN, DIRECTOR Free on application to /he U.S. Geological Survey, Washington 25, D. C. CONTENTS Page Page Abstract ____________________________ 1 Flood-frequency analysis Cont. Introduction _. ____ _ ___ 1 Regional flood-frequency analysis___ 11 Description of area ________________ 1 Base period ____________________ 11 Phy siography____________________ 1 Definition of mean annual flood ___ 11 Soil.__ ____________ 1 Homogeneity of records__________ 12 Climate __ ___________________ 2 Composite frequency curves ______ 12 Drainage areas __________________ 3 Relations of mean annual flood____ 12 Causes of floods__________________ 3 Hydrologic areas-_______________ 14 Flood records available ____________ 3 Application of regional flood-frequency Flood-frequency analysis____________ 9 data ____________________________ 16 Flood frequency at a gaging station _ _ 9 Tributary areas of natural runoff -__ 16 Value _________________ _ ____ 9 Stage of flood discharge ____________ 16 Types of series _________________ 9 Maximum known floods_______________ 17 Plotting position--- ____________ 10 Summary ___________________________ 32 Historical data __________________ 10 Selected references __j.______________ 32 Fitting frequency curves _________ 10 Limitations of a single-station analysis _____________________ 10 ILLUSTRATIONS Page Figure 1. Generalized areas of soil sources in Nebraska_____--_____--------------_-_- 2 2. Map of Nebraska showing location of gaging stations used in flood-frequency analysis ______________________________________________________________ 9 3. -
Prevent Soil Erosion on Your Property
How to Use Sandbags Filling Filling sandbags is best done with two people. Fill half full with sand if available or local soil. ������������ ���������� Stacking PREVENT SOIL EROSION Fold top of sandbag down and rest the bag on its top on the stack. Top should be facing upstream. Stamp the bag into place. Complete each layer before starting the next layer. Stagger the layers. Stack no more than three layers high unless they are ON YOUR ROPERTY against a building or stacked pyramid-style. P Sandbag diversion HOMEOWNER S GUIDE TO EROSION CONTROL ��������������� ������������� Sandbags will redirect water away from property but will not A ' �������������� ������������ seal out water. Place sandbags with the folded top toward the upstream or uphill direction. Sandbags are temporary and will deteriorate after several months. DO’S AND DON’TS Do: Don’t: • Contact your local Flood Control Agency or Public Works • Under-estimate the power of debris flows. Authority- Installing these erosion control devices on your property may not be sufficient to thwart extreme flows. • Walk or drive across swiftly flowing water. • Try to direct debris flows away from your property to a • Wait until storms arrive to make a plan. recognized drainage device or to the street. • Try to confine the flows more than is necessary. • Clear a path for debris. • Direct flow to neighbor’s property. • Place protective measures to divert debris, not dam it. • Board up windows facing the flow • Work with your neighbors. Don’t Forget to Plan for Erosion Control ALL YEAR ROUND In an effort to help landowners protect their Preventing runoff during the spring and summer is equally as Soil erosion can happen property, professional NRCS Conservationists important as preventing erosion. -
Scotland's Great Glen Hotel Barge Cruise ~ Fort William to Inverness on Scottish Highlander
800.344.5257 | 910.795.1048 [email protected] PerryGolf.com Scotland's Great Glen Hotel Barge Cruise ~ Fort William to Inverness on Scottish Highlander 6 Nights | 3 Rounds | Parties of 8 or Less PerryGolf is delighted to offer clients an opportunity of cruising the length of Scotland’s magnificent Great Glen onboard the beautiful hotel barge Scottish Highlander, while playing some of Scotland’s finest golf courses. The 8 passenger Scottish Highlander has the atmosphere of a Scottish Country House with subtle use of tartan furnishings and landscape paintings. At 117 feet she is spacious and has every comfort needed for comfortable cruising. On board you will find four en-suite cabins each with a choice of twin or double beds. The experienced crew of four, led by your captain, ensures attention to your every need. Cuisine is traditional Scottish fare, salmon, game, venison and seafood, prepared by your own Master Chef. The open bar is of course well provisioned and in addition to excellent wines is naturally well stocked with a variety of fine Scottish malt whiskies. The itinerary will take you through the Great Glen on the Caledonian Canal which combines three fresh water lochs, Loch Lochy, Loch Oich, and famous Loch Ness, with sections of delightful man made canals to provide marine navigation for craft cutting right across Scotland amidst some spectacular scenery. Golf is included at legendary Royal Dornoch and the dramatic and highly regarded Castle Stuart, which was voted best new golf course worldwide in 2009. In addition you will play Traigh Golf Club (meaning 'beach' in Gaelic) set in one of the most beautiful parts of the West Highlands of Scotland with its stunning views to the Hebridean islands of Eigg and Rum, and the Cuillins of Skye. -
A Guide to Temporary Erosion-Control Measures for Contractors, Designers and Inspectors
A Guide to Temporary Erosion-Control Measures for Contractors, Designers and Inspectors June 2001 North Dakota Department of Health Division of Water Quality A Guide to Temporary Erosion-Control Measures for Contractors, Designers and Inspectors June 2001 North Dakota Department of Health Division of Water Quality 1200 Missouri Ave. PO Box 5520 Bismarck, ND 58506-5520 701.328.5210 ÿ Table of Contents ÿ PURPOSE AND USE OF THIS MANUAL........................................................................................................... III PURPOSE........................................................................................................................................................................III USE..................................................................................................................................................................................III ÿ NDPDES PERMITS ................................................................................................................................................ IV ÿ DESIGN OBJECTIVES............................................................................................................................................V ÿ SELECTION CHART............................................................................................................................................. VI ÿ SECTION 1 − BALE DITCH CHECKS............................................................................................................... 1-1 PURPOSE AND OPERATION................................................................................................................................... -
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 -
Hydrologic Alteration of the Lower Rio Grande Terminus: a Quantitative Assessment
RIVER RESEARCH AND APPLICATIONS River. Res. Applic. 25: 241–252 (2009) Published online 29 April 2008 in Wiley InterScience (www.interscience.wiley.com) DOI: 10.1002/rra.1151 HYDROLOGIC ALTERATION OF THE LOWER RIO GRANDE TERMINUS: A QUANTITATIVE ASSESSMENT MICHAEL F. SMALL,* TIMOTHY H. BONNER and JOHN T. BACCUS Department of Biology, Texas State University—San Marcos, San Marcos, TX 78666, USA ABSTRACT The lower Rio Grande is one of several imperilled river reaches in North America. Drought and water withdrawals for agriculture and municipal use are acknowledged as primary sources of riverine degradation. We agree that these are critical components adversely affecting the river but also suggest disruption in the normal flood-pulse cycle of the lower Rio Grande, resulting from impoundment of Falcon Lake and poor management of releases from Falcon Lake Dam, have contributed substantially to decline in ecosystem integrity. We provide statistical evidence and real observations in support of the hypothesis that loss of the natural flood-pulse cycle of the lower Rio Grande has detrimentally affected the riparian ecosystem. Although the presence of adverse effects from disruption of the flood-pulse cycle is intuitive, this is the first report quantifying the degree of alteration in the lower Rio Grande. Copyright # 2008 John Wiley & Sons, Ltd. key words: Rio Grande; Texas; riparian; alteration; flood-pulse cycle Received 9 March 2007; Accepted 28 February 2008 INTRODUCTION Excerpt from CBS Radio Network: ‘Title: One of the world’s most celebrated rivers is almost gone. There’s an old saying in Texas—whiskey is for drinking and water is for fighting. -
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.