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Infiltration drainage - manual of good practice

Series/doc. No Report Report R 156
Year 1996
Abstract Provides a guide to good practice for those involved in the approval, funding, design, construction and maintenance of infiltration drainage systems. The report also discusses the advantages and disadvantages of such systems, and covers: feasibility studies, field tests, design types and the incorporation of suitable pollution prevention measures.
ISBN 9780860174578
Subject(s) Civil engineering, infrastructure and public utilities
Public health/water engineering
Sewerage/drainage
Storm drains
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Publisher CIRIA
Publisher History CIRIA was formerly known as the Construction Industry Research and Information Association. They are a member-based research and information organisation who publish reports and technical papers covering building and civil engineering as well as transport and utilities infrastructure.
Table Of Contents
Figures 14
Tables 13
Notation 12
Guide to use 11
1 Introduction 17
1.1 What is infiltration drainage 17
1.2 The role of infiltration in stormwater drainage practice 17
1.3 Background to project 17
1.4 Purpose of manual 18
1.5 Scope of manual 18
1.6 Sources of information 18
1.7 CIRIA's project on Highway Drainage Systems 18
1.8 Associated publications 19
2 Infiltration drainage systems 20
2.1 Infiltration drainage in the context of stormwater drainage 20
2.2 Principles of infiltration drainage 23
2.3 Main types of infiltration system 23
2.4 Usage of infiltration systems 30
2.5 Advantages and disadvantages of infiltration 32
3 Guide to the design and approval procedure 33
3.1 Introduction 33
3.2 Overall design and approval process 33
3.3 Feasibility of using an infiltration system 33
3.4 Outline approval 35
3.5 Site investigations 37
3.6 Selection of infiltration system 37
3.7 Design of infiltration system 38
3.8 Approval from appropriate authorities 49
4 General design considerations 52
4.1 Introduction 52
4.2 Appraisal of costs 52
4.3 Hydrological and hydrogeological principles of infiltration 59
4.4 Hydraulic design 63
4.5 Geotechnics 77
4.6 Pollution control requirements and methods of mitigation 80
4.7 Maintenance responsibilities 88
5 Design considerations for particular systems 90
5.1 Introduction 90
5.2 Infiltration basins and swales 90
5.3 Infiltration trenches with surface inflow 98
5.4 Infiltration pavements 101
5.5 Infiltration blankets 104
5.6 Soakaways including circular, trench and linked soakaways 107
6 Legal and administrative aspects of infiltration drainage 111
6.1 Summary 111
6.2 Legal aspects 111
6.3 Administrative aspects 114
7 Further issues 117
7.1 Legislation 117
7.2 Adoption 117
7.3 Long-term performance and maintenance 117
7.4 Maintenance procedures 117
7.5 Water quality 118
7.6 Analysis of the risk of groundwater pollution 118
7.7 Cost data 118
8 Conclusions 119
References 120
Appendix 122


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