Riprap channel protection design software

The applicable sizes for the guidance in this manual range from 15 mm 0. Ruff2, and subhendu mishra3 abstract riprap, or some type of rockfill, is commonly used to prevent erosion of the downstream. Riprap, cobble, and gravel linings are considered permanent flexible linings. As a cost effective alternative to reinforced concrete lining or grouted rip rap, the armorflex tapered series provides. Instead of using a traditional toedown protection for the armored channel bank for a certain segment of the salt river in phoenix, arizona, a launchable riprap toeprotection design is being considered for cost comparison. Structural design of concrete lined flood control channels course no. This document provides a users manual for windows program chanlpro, which replaces riprap15 and addresses the following three areas pertinent to the design of channel protection. Us army corps of engineers scour and scour protection. Steven hughes, phd contents scour problems in coastal engineering prediction of scour design of scour protection design of scour blankets cem chapters vi53f and vi56 author. Riprap calculator, rock sizing isbash equation, erosion. Shoreline stabilized with riprap and enhanced with a vegetative buffer. Capacity shall be determined by the following methods.

Riprap does not provide the habitat enhancement that vegetative practices do. Riprap outlet protection is usually less expensive and easier to install than concrete aprons or energy dissipators. A riprap channel lining is flexible and adjusts to. Rock riprap design for protection of stream channels near highway structures volume 1 hydraulic characteristics of open channels by j. The emphasis in this course is on the design of rock riprap revetments. Army corps of engineers riprap design guidance for placement in the dry for channels subjected to velocity forces in low turbulent flow based on usace guidance. This chapter focuses on the preservation, enhancement, and restoration of stream corridors as well as the design of constructed channels and swales using natural concepts. Rock riprap is a layer of loose rock used to protect soil from the erosive or scouring flows of water. While it is difficult to select a single criterion that. Flow in a stream or river is unidirectional and typically aligned parallel to the banks. Culvert protection mn tr3 aids in design of riprap outlet basin for culverts. Typical channels were found to have a maximumtomean depth ratio of 1. This manual provides procedures for the design of riprap revetments to be used as channel bank protection and channel linings or larger streams and rivers.

Counties of adams, arapahoe, and douglas, with the support of the university of colorado at denver, to provide stepbystep design procedures for various types of. They may be described as a noncohesive layer of stone or rock with a characteristic size, which for the purposes of this manual is the d 50. United states army corps of engineers engineering manual. Round riprap is not recommended for cdot channel revetment. Recent research findings and revised design procedures have been incorporated. Performing organization name and address 2963 ash street denver. Design geoweb channels with varying infill options that eliminates the need for costly riprap, gabions and articulated concrete blocks acbs. Dambrk downloads, dambrk software, dambrk tutorials, and. Armorflex for channel, spillway and dam overtopping protection. Streambank protection design criteria for sizing stone for stability of channel bank are presented in standard and specifications for structural streambank protection. Design criteria open channel flow conditions design storm the riprap shall be designed to be stable when the channel is flowing at the design discharge or the 25year frequency storm discharge, whichever is greater. Chapter 8 open channels january 2016 urban drainage and flood control district 81 urban storm drainage criteria manual volume 1. Armorflex tapered block series is capable of providing erosion protection in high velocity applications, such as spillways, overtopping and diversion channels. The riprap channel protection design software addresses three areas pertinent to the design of channel protection.

Volume i discusses the hydraulic and channel properties of streams, based on data from several hundred sites. Army corps of engineers riprap design for flood channels stephen t. The isbash equation computes the smallest diameter stone d having specific gravity s that if dropped in water flowing at velocity v will settle and remain stationary on the channel bed blevins. Army corps of engineers riprap design for flood channels. This technical publication with a computer software package was developed by the author, in collaboration with the urban drainage and flood control district in denver city and county of denver, cities of aurora and littleton. Simplified design guidelines for riprap subjected to overtopping flow by kathleen h. This 3hour interactive online course provides procedures for the design of riprap revetments to be used as channel bank protection and channel linings on larger streams and rivers i.

The toe of the riprap should be keyed into a stable foundation at its base as shown in figure 5b. A section of stone or crushed concrete protection placed at the outlet end of the culverts, conduits, or channels. Streamflow and geomorphic data have been collected and developed to indicate the range in hydraulic factors typical of open channels, to assist design, maintenance, and construction engineers in preparing rock riprap bank protection. The launchable riprap will comprise of similar riprap materials and volume. The isbash equation computes the smallest diameter stone d having specific gravity s that if dropped in water flowing at velocity v will settle and remain stationary on the channel bed blevins, 2003, p. Nchrp report 568 riprap design criteria, recommended. Riprap protection section 1 introduction to riprap section 2 channel characteristics section 3 design guidance for stone size section 4 revetment toe scour estimation and protection section 5 ice, debris and vegetation section 6 quality control. Accessibility of site channel grade discharge frequency discharge velocities future maintenance alignment stream type and hydraulic geometry sediment load and bed material protection against failure undermining ends of revetment debris removal vegetative systems protective measures for streambanks.

Procedures are also presented for riprap protection at bridge piers and abutments. Rock riprap is sometimes used for bank protection or bed stabilization in stream restoration projects where other erosion control techniques are not appropriate. Riprap used as outlet protection should be constructed before the pipe or channel begins to operate. V design example procedure for design of outlet protection 15 vi example procedure for designing a riprap outlet or channel 18. Riprap calculator, rock sizing isbash equation, erosion control. Disadvantagesproblems wellgraded riprap forms a dense. Appendix d, which details research into the history of reclamation s riprap sizing and an evaluation of.

This technical release is not meant to be used for the design of rock chutes, nor lined channels steeper. Hec 11 stream bank protection products and manufacturers. Typical trapezoidal channel types are shown in figure 21. Aids in design of riprap outlet basin for culverts. Urban flood channel design books, software, proceedings.

Rds incorporates the latest criteria from the following seven riprap design methods. This powerful, easytouse tool provides guidance in the selection of materials for multiple hydraulic analyses, including slope erosion protection and channel scour resistance. Army corps of engineers american society of civil engineers. Rock riprap design for protection of stream channels near. Loose riprap protection topic pages foreword chapter 1. Technical supplement 14c stone sizing criteria ts14c2 210vineh, august 2007 flow conditions the flow conditions associated with a particular application will have a major influence on selecting the right rock sizing method. Hec11 brown and clyde 1989 provides procedures for the design of riprap revetments for channel bank protection on larger streams and rivers where the active force of the flowing water exceeds the bank materials ability to resist movement. According to the aashto roadside design guide, roadside drainage channel is an open channel usually paralleling the highway embankment and within limits of the row. The manual has been expanded into a comprehensive design publication. Riprap design and construction guide ministry of environment. United states army corps of engineers engineering manual em 111021601. A primary consideration in the design of stable riprap bank protection schemes is the slope of the channel bank.

For riprap installations, normally the maximum recommended face slope is 1v. Scope this standard applies to the planning, design, and construction of rock riprap and gabions for protection of downstream areas. Geological survey waterresources investigations report 864127 prepared in cooperation with federal highway administration o i o 00 sacramento, california 1986. Kilgore consulting and management april 2004 august 2005. For reservoirs and flowages, the ohwl is the operating elevation of the normal summer pool. Army corps of engineers usace riprap design guidance for placement in the dry for channels subjected to velocity forces in low turbulent flow based on guidance found in usace 1994.

Bank side slopes too steep presence of excess hydrostatic pressure loss of foundation support at the toe of the riprap blanket caused. As a result, there is a need for riprap design approaches that can be applied consistently for erosion and scour protection on river banks, bridges, and channel. Users enter the information in the green cells, excel performs the calculations, and puts the results in the orange cells. Hydraulic design of energy dissipators for culverts and. Hydraulic design of energy dissipators for culverts and channels hydraulic engineering circular number 14, third edition. This tool will calculate the filter material along with riprap size. All programs of the department of agriculture are available to anyone. Chapter 6 coastal revetments for wave attack pile buck. Toe protection design method b if channel bottom is nonerodible, riprap is. Keep in mind when using this tool that a filter material must be separately designed. Sediment basin design rational method rational method with kinematic wave tc mannings n spillway capacity riprap outlet protection ny riprap outlet protection plunge pool, submerged outlet plunge pool, cantilevered outlet design note 6. How to calculate riprap using the hydraulic toolbox. This chapter provides guidance for designing systems with openchannel flow, including determining design velocity section 42 and critical depth section 44, designing roadside ditches section 43 and backwater analysis for river flow section 45.

The purpose of the rock outlet protection is to reduce the depth, velocity, and energy of water, such that the flow will not erode the receiving downstream reach. The purpose of the rock outlet protection is to reduce the velocity, and energ y of water, such that the flow will not erode the receiving downstream reach. Filter blanket a filter blanket is a layer of material placed between the riprap and the underlying soil to prevent soil movement into or through the riprap. The design thickness of the riprap should extend a minimum of 3 feet horizontally from the slope. This spreadsheet is a process to assist with proper design of riprap for channel banks based on the shear stress approach outlined in river mechanics pages 240243, 245250.