Era drainage design manual 2002

Chapter 5 design controls criteria geometric design manual. In the example, kvltest1, 01, major basin 01, 10 compose one record in the table basins. Policy of sanral in respect of unsolicited proposals. Policy and guidelines considerations regarding highway drainage design for txdot. The objective of storm water conveyance systems storm drain piping, ditches and. Volume 2 technical handbook georgia stormwater management manual 51 chapter 5 stormwater drainage system design table of contents section 5.

Location and design division location and design business. Ethiopian roads authority drainage design manual 123 help me. In december 2002, sherman city councilors adopted a new flood study, performed by kimley horn engineers in cooperation with city engineering department staff. Section i, introduction, is a general discussion of the intended use of the material and an explanation of its organization.

Drainage design management system users manual 9238. Special considerations are included for surface and subsurface drainage, water management and water control structures, and other important design considerations. The network comprises a huge national asset that requires adherence to appropriate standards for design, construction and maintenance in order to provide a high level of service. This policy encourages overall national economic development. The drainage of liquid waste from a private sewage network of a building into the public sewage network shall be by way of natural drainage. Precipitation data is most often in the form of design storms. Design criteria values should be established taking into considtion the departmentera s context sensitive design philosophy that strives for outcomes that meet transportation service and safety needs, as well as environmental, scenic, aesthetic, cultural, natural resource, and community needs. Development of a national design manual, standard specifications and bidding documents for low volume roads in ethiopia. Design and construction of urban stormwater management.

Revision of the drainage design manual in ethiopia. Methods andprocedures are given for the hydraulic design of storm drainage systems. This accomplishes two primary goals reduce damages from larger floods avoid total washout of diversion this is usually accomplished by ensuring that. This is to ensure that potholes do not develop by rapidly removing surface water and to ensure that excessive crossfall does not cause erosion of the surface. Erosion and sediment control manual 90mb size 2010 version. In addition to this, the cutting edge will not easily penetrate a hard surface, making it hard to trim out even light depressions in the. Provision of best practice and case studies of drainage infrastructure internally within ethiopia and elsewhere in africa, caribbean and usuk. This climate zoning is given in the drainage design manual era, ethiopian. Drainage lifecycle provisions related to highway drainage systems.

Local issues and experience on the geometric, earthwork, drainage. This manual covers the planning, design, construction, maintenance and operation of road drainage infrastructure. Summary in order to a establish a design rainfall and flow estimation methodology compatible to the ethiopian environment and facilitate standard design practices in all road design works in ethiopia, the ethiopian road authority era had commissioned louis berger group to prepare a road drainage design manual in 2002 under a credit from the. The material will not roll across the face of the moldboard and does not mix. A policy on design standards interstate system, aashto, 2005 b. The most recent version of the drainage manual is presented and is the official source for the development and application of all drainage design related to vdot plans. Manual introduction overview of the material covered in this manual. Watershed management field manual fao conservation guide 5 food and agriculture organization of the united nations rome 1998 table of contents. Mto drainage management manual, dmm, 1997 hard copies can also be purchased from service ontario publications highway drainage design standards 2008 mto gravity pipe design guidelines.

Proposed revisions and additions to the existing era drainage design manual 2002 include. The supplement will be referred to as the northern rivers local government handbook of stormwater drainage design. A policy on geometric design of highways and streets, aashto, 2011 6. The road network in ethiopia provides the dominant mode of freight and passenger transport and thus plays a vital role in the economy of the country. Standards for highways design manual for roads and bridges. The example shows a total of two records and four fields. The design manual for roads and bridges dmrb contains information about current standards relating to the design, assessment and operation of motorway and allpurpose trunk roads in the united kingdom. Road drainage manual department of transport and main roads. Code of procedures for the planning and design of highway and road structures in south africa feb 2002 11. However, i should emphasize that careful consideration to sound engineering practice shall be observed in the use of the manual, and under no.

This design manual for low volume roads 2011 forms part of the ethiopian roads authority. Era 2002 design manuals other documents typical cross sections recommended grades and drainage provision for rural roads rr50,rr30 and rr10. Storm drainage design and technical criteria manual. Drainage and stormwater management general notes can be placed using the procedures detailed in chapter 3 section 3. Developed in an era when only nasa and a few research scientists had access to computers, the. This manual supersedes the pavement design manual volume ii rigid pavements part of the era design manual series of 2002.

This drainage design manual has been prepared as a guide for the hydraulic design of highway drainage facilities. Design guidance is provided for the design of storm drainage systems which collect, convey, and discharge stormwater flowing within and. Return period of 5 10 20 25 50 and 100 return period of 5, 10, 20, 25, 50, and 100. Drainage design manual final nov ethiopian roads authority. Jan 21, 2016 duration time of concentration the time required for water from the remotest place to reach a specific point on the drainage system. Procedures for road planning and geometric design 256kb jan 2003. Adding new useful local information, which has become available since the publication of the era drainage. Ohio department of transportation central office 1980 west broad street columbus, oh 43223 mike dewine, governor jack marchbanks, director. Due to technological development and change, these manuals require periodic updating. Policy design guideline standards for single carriageway national roads draft 276kb may 2009. The standards set out shall be adhered to unless otherwise directed by era. April 2000 revision only february 2000 section 200 revision only february 2000 section 700 revision only february 2000 section 800 revision only february 2000 section 1600 revision only december 2001 revision only may 2006 revision only.

The original bridge and structures design manual was created through the publicprivate. The design methodologies contained within allow the engineer to analyze the influence of all components of the srw system on wall performance. Alternatives to the use of design storms are historic storms and continuous simulation. This current version of the manual has particular reference to the prevailing. Chapter 1 manual introduction section 1 about this manual hydraulic design manual 14 txdot 11 2002 organization this manual is organized as follows. In 2002, the ethiopian roads authority era first brought out road design manuals to provide a standardized approach for the design, construction and maintenance of roads in the country. Revision of the drainage design manual in ethiopia contract. Policies in respect of road planning and design 80kb jan 2003. Roadway design manual, ch 2 sec 7 drainage facility placement.

Appendix a classification and description of roads era. Erosion and sediment ontrolc esc items are placed in a separate cadd file. Chapter 10 storm drainage facilities drainage design manual 20 page 102 ethiopian roads authority surface drainage is a function of transverse and longitudinal pavement slope, pavement roughness, inlet spacing, and inlet capacity. Drainage manual december 1996 41 chapter 4 precipitation introduction overview precipitation is applied to a drainage area to calculate runoff with the sacramento method. Effective with design approval on or after may 01, 2020. January 01, 2020 purpose this manual documents policy on bridge design in texas. Chapter 9 hydraulic structures september 2017 urban drainage and flood control district 93 urban storm drainage criteria manual volume 2 there are two fundamental systems of a drop structure that require design consideration. This is to ensure that potholes do not develop by rapidly removing surface water and to ensure that excessive crossfall does not. Drainage handbook for the preparation of drainage connection 1486 permit application package 2mb size. In 2002 the ethiopian roads authority era published road design manuals to. Manual, standard specifications and bidding documents for low. All drainage projects shall conform to requirements in this storm water drainage design manual, the citys storm drain master plan, and shall be approved by city personnel. Mitigation measures were proposed based on era drainage design manuals 2002 and 2011 for. Most documents are in pdf format which can be viewed by using the.

Vdot governance document location and design division issued april 2002 revised july 2019. Design manual for segmental retaining walls 3rd edition. Environmental resource permit stormwater quality applicants. In 2002, the ethiopian roads authority era first brought out road design manuals to provide a standardized. July 2017 vdot governance document drainage manual. Section 11, drainage design criteria, lists criteria and parameters for the design of various drainage related facilities. Standards for highways design manual for roads and. The department of transport and main roads has generally agreed to adopt. Storm drainage design is an integral component in the design of road and transportation networks. Environmental protection agency off iice of water program ti operons a office of research and development municipal envi ronmental research laboratory. Geometric design manual 20 classification of roads ethiopian roads authority page a3 a2 a21 a22 a23 a24 a25 a26 a27 a28 a29 a210 a211 a212 b20 b21 b211 b212 b22 b221 b222 b223 b224 b225 c21 d21 d22 e21 e22 e23 i. Road authority, 2002 and is used for design of all structures that. Roadway design florida department of transportation.

Structural design of storm drain, computer application manual. This manual supersedes the drainage design manual part of the era 2002 series of. Circular culverts and storm sewers revised, april 2014. Rainfall intensity runoff is obtained by considering expected sever storm.

This manual is divided into the following five sections. Hydraulic design series 2, highway hydrology, october 2002. The engineering area contains technical engineering data related to flood control in clark county, fema firm panel information, capital improvement project design and asbuilt documents and an electronic version of the hydrological criteria and drainage design manual hcddm. Appendix a geometric design manual 20 classification of roads ethiopian roads authority page a1 appendix a classification and description of roads the following are the classified roads in ethiopia under the five classes.

Through this step the design of the storm drainage system will evolve from the preliminary. Design and construction of urban stormwater management systems water environment federation and american society of civil engineers mop 77wef mop fd. Summary in order to a establish a design rainfall and flow estimation methodology compatible to the ethiopian environment and facilitate standard design practices in all road design works in ethiopia, the ethiopian road authority era had commissioned louis berger group to prepare a road drainage design manual in 2002 under a credit from the international development agency ida. Other relevant documentation but not limited to which shall be referenced and.

Design guidance is provided for the design of storm drainage systems which collect, convey, and discharge stormwater flowing within and along the highway right ofway. Chapter 9 hydraulic structures urban drainage and flood. Ih 635 drainage criteria manual 11 october 2006 chapter 1 introduction 1. This is the other extreme of pitching the moldboard too far forward. Comprehensive study the comprehensive study has two major components. Highway capacity manual, 2000, published by transportation. Temporary drainage design as with any stream crossing, temporary structures should be design to accommodate larger floods than the design flood. Duration time of concentration the time required for water from the remotest place to reach a specific point on the drainage system. The most recent version of the drainage manual is presented and is the official source for the development and application of all drainage design. Roads will affect the natural surface and subsurface drainage pattern of a watershed or individual hillslope. It provides the technical reference required for all aspects of hydraulic, road drainage, erosion, environmental and sediment control throughout queensland. Location and design division issued april 2002 rev.

The urban drainage design manual, hydraulic engineering circular no. Mece organised a stakeholder workshop to obtain experiences of practitioners and identify where the perceived shortfalls exist in the current manual and what research and available information now exists that can be incorporated into the manual. The standards set out shall be adhered to unless otherwise. Road drainage design has as its basic objective the reduction andor elimination of energy generated by flowing water. Drainage is one of the essential components of roadway design.