SMALL DAMS PETITS BARRAGES

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6. REFERENCES Fig.5.18 – Standard cross section of vertical core small dams. [1] CHINCOLD (1979) – Dam Construction by the Chinese People, The Chinese National Committee on Large Dams;. [2] SHERARD, J.L., DUNNIGAN, L.P. (1985) – “Filters and Leakage Control in Embankment Dams”, Proc. Symposium on Seepage and Leakage from Dams, ASCE. [3] Bureau of Reclamation (1987) – Design of Small Dams, United States Department of the Interior, A Water Resources Technical Publication; [4] LEWIS, B. (2002) – Farm Dams – Planning, Construction and Maintenance, National Library of Australia Cataloguing; [5] CEMAGREF (2002) – Small Dams – Guidelines for Design, Construction and Monitoring, French Committee on Large Dams; [6] DURANT JM, ROYET P, MÉRIAUX P (2002) – Technique des Petits Barrages en Afrique Sahélienne et Équatoriale, Cemagref Editions. [7] SMEC (2006) – Draft Guidelines for Managing Small Dams, SMEC Australia Pty Ltd, Guide developed on behalf of The Republic of Uganda. [8] JSIDRE (2006) – The Guidelines for Designing of Agricultural Land Improvement Projects, “Tameike Small Dams”, Japanese Society of Irrigation, Drainage and Reclamation Engineering, February 2006. 92
6. GUIDELINES ON SURVEILLANCE OF <strong>SMALL</strong> <strong>DAMS</strong> 6.1 INTRODUCTION The owners and project engineers, who are responsible for the safe and economic operation of dams need to be adequately informed about the following: � How to detect, measure, evaluate and remedy problems which may adversely affect safe and economic performance of the dam, its appurtenances and equipment? � How to comply with governmental regulations pertaining to dam safety? � How to integrate inspection and Dam Performance Evaluation Program activities, with operation and maintenance of the project? � What type of organization and assignment of responsibility for inspection, data collection and reporting would be practical and effective in promoting safe and economical project operation? � What are the desired qualifications of a dam safety inspector? � What should be the frequency and scope of visual inspections? � When the inspection reports and monitoring data are received, how to evaluate and analyze the data and what follow-up actions to take? � What are the remedial actions which could be taken to alleviate or correct certain problems to restore the structure to an acceptable operating condition? 6.2 SAFETY SURVEILLANCE It is always important to a dam owner to play an important role in the dam safety process. Frequent visits to the dam are needed to enable to observe any problem that may be developing and affecting the dam safety. � If the dam fails, the dam owner are likely to be liable for any loss of life, injury or damage which results from the accident; � Even if a failure does not cause damage outside his property, the cost of remedial work can easily exceed the original construction cost of the dam. A property owner who is planning to build a new dam must minimize the possibility of failure, attached liability and could also contribute to the safety of the dam by: � Having the dam designed, constructed and supervised by a qualified and experienced professional engineer; � Establishing a program of regular inspections (surveillance) and periodic maintenance, including the keeping of appropriate records; � Monitoring conditions that may affect the safety of dams, be able to recognize the signs of potential problems and imminent failure; � Having an experienced dam engineer investigating any unusual conditions which could result in total or particle failure; � Knowing what to do and who to contact when such problem appear. 93
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SMALL DAMS Design, Surveillance and
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FOREWORD The ICOLD - International
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ACKNOWLEDGEMENT The Ad Hoc Committe
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FOREWORD ACKNOWLEDGEMENT SUMMARY TA
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5.5.5 Compaction in confined areas
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7.2.1 Introduction 7.2.2 Spillway c
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1. SMALL DAMS DEFINITION AND CLASSI
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2 Fig. 1.2 - Relationship H . V wit
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1.3 REFERENCES [1] French Committe
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2.3 ZONED EARTHFILL DAMS In arid pa
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sloping core guarantees water impou
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Fig. 2.11 - Hlinky Concrete Gravity
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Fig. 2.13 - Photograph of Neusberg
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The gabion dam as the gabion retain
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Some inflatable dams are operated b
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3.1 INTRODUCTION 3. SAFETY OF SMALL
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Condition Effect on safety 13. Dama
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Fig. 3.2 - Massive dam break overto
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and suffusion or internal instabili
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downstream part of the embankment m
Page 41 and 42: small dam impounding a lot of water
Page 43 and 44: Whenever the Supervising Authority
Page 45 and 46: emergency management organizations
Page 47 and 48: c) The decommissioning plan should
Page 49 and 50: 5.1 INTRODUCTION 5. FEATURES OF THE
Page 51 and 52: 5.2 DESIGN FLOODS Inadequate flood
Page 53 and 54: downstream slope will show seepage
Page 55 and 56: Fig. 5.2 - Design Freeboard 5.4.3 F
Page 57 and 58: 2 U f Fe S 1400 D Where Uf is the d
Page 59 and 60: Maximum compaction is obtained at c
Page 61 and 62: characteristic must be determined.
Page 63 and 64: 5.6.1 Foundation Watertightness The
Page 65 and 66: � A continuous vertical chimney d
Page 67 and 68: Thickness of pervious layer Thick D
Page 69 and 70: t 5.7.1.4 Practical Considerations
Page 71 and 72: It is generally accepted that cohes
Page 73 and 74: � Simple Bishop (1955) � Spence
Page 75 and 76: � The elements for surface draina
Page 77 and 78: The supporting layer for the rip-ra
Page 79 and 80: For very small reservoirs (fetch of
Page 81 and 82: The junction of the downstream slop
Page 83 and 84: Fig. 5.14 - Hongshiyan homogenous d
Page 85 and 86: material has been left in place or
Page 87 and 88: The homogeneous dam is recommended
Page 89 and 90: [3] OL and OH soils are not recomme
Page 91: part (core) lies in the zone (Fig.
Page 95 and 96: cases the owner may retain the serv
Page 97 and 98: Surface displacement on an embankme
Page 99 and 100: Fig. 6.1 - Leakage measurement usin
Page 101 and 102: Water Level Sounder - Details of th
Page 103 and 104: pressure) Left abutment 2 5 Weir ga
Page 105 and 106: Fig. 6.9 - Recommended standpipe pi
Page 107 and 108: the others weir gauges need to be i
Page 109 and 110: � Earthquakes sensible at the dam
Page 111 and 112: APPENDIX INSPECTION CHECKLIST FOR S
Page 113 and 114: Exposed reinforcement � The condu
Page 115 and 116: These spillways can be lined or unl
Page 117 and 118: flowing water. Flowing water with h
Page 119 and 120: Fig. 7.3 - Installation of the arti
Page 121 and 122: Fig. 7.7 - Dam overtopping protecti
Page 123 and 124: complete construction was in 2001,
Page 125 and 126: In some cases, the downstream face
Page 127 and 128: Tube-a-manchettes injection system
Page 129 and 130: 7.3.5 Slope Protection Measures 7.3
Page 131 and 132: Pipe Rehabilitation SLIPLINING MODI
Page 133 and 134: Conditions Pros Cons Comments types
Page 135 and 136: Embankment dams that have properly
Page 137 and 138: and minimize erosion. Design of sui
Page 139 and 140: [20] SMEC- “Draft Guidelines for
Page 141 and 142: present visual information. It must
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Fig. 8.1 - Three small dams in casc
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Social Disruption low (rural area)
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Fig. 8.4 - Flood water level after
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8.9 REFERENCES [1] BURREC (1994) -
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