SMALL DAMS PETITS BARRAGES

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[11] DURAND J.M., ROYET P, MERIAUX P (2002) – Technique des Petits Barrages en Afrique Sahélienne et Équatoriale, Cemagref Editions; [12] FELL, R., C.F. WAN, CYGANIEWICZ, J., and FOSTER, M. (2003). “Time for Development of Internal Erosion and Piping in Embankment Dams,” Journal of Geotechnical and Geoenvironmental Engineering, Vol. 129, No. 5, April, pp. 301-315. [13] MCCOOK, D. (2005). “A Comprehensive Discussion of Piping and Internal Erosion Failure Mechanisms,” Proc. Assoc. State Dam Safety Officials, Annual Meeting, Sept 26- 30, Phoenix, Arizona, USA. [14] SMEC (2006) – Draft Guidelines for Managing Small Dams, SMEC Australia Pty Ltd, Guide developed on behalf of The Republic of Uganda; [15] ROYET P.(2006) – La Surveillance et l’Entretien des Petits Barrages. [16] CSN 752410 (1997) – Standards for Small Dams Sesign, Construction, Operation and Reconstruction, in Czech Republic. 110
APPENDIX INSPECTION CHECKLIST FOR <strong>SMALL</strong> <strong>DAMS</strong> DAM NAME: ..................................................................................................... TYPE: ............................................................................................................... FOUNDATION (Geology): ................................................................................ LOCALIZATION: …………………………………………………………………. DATE: …………………………. Water Level: ………………………………….. Weather conditions: ……………………………………………………………… INSPECTED BY: ………………………………………………………………… 1. CREST � Settlements, depressions, sinkholes � Misalignment � Longitudinal/transversal cracking � Animal burrows � Adverse vegetation � Erosion 2. UPSTREAM SLOPE � Loss of rip rap material � Stone weathering/deterioration � Inadequate ground cover � Settlement, depressions, slides, sinkholes � Longitudinal/transversal cracking � Animal burrows � Vegetation (large shrubs, trees) 3. DOWNSTREAM SLOPE � Erosion � Inadequate ground cover � Longitudinal/Transverse cracking � Settlement, slides, depressions, bulges, sinkholes � Superficial drainage clogged � Soft spots or boggy areas � Movement near the toe � Animal burrows � Vegetation (large shrubs, trees) 4. DRAINAGE-SEEPAGE CONTROL � Internal drains flowing � Boils near the toe � Seepage near the toe � There are sediments at the drainage boxes � The water is not clear 111
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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
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small dam impounding a lot of water
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Whenever the Supervising Authority
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emergency management organizations
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c) The decommissioning plan should
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5.1 INTRODUCTION 5. FEATURES OF THE
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5.2 DESIGN FLOODS Inadequate flood
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downstream slope will show seepage
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Fig. 5.2 - Design Freeboard 5.4.3 F
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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 and 92: part (core) lies in the zone (Fig.
Page 93 and 94: 6. GUIDELINES ON SURVEILLANCE OF SM
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: � Earthquakes sensible at the dam
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
Page 143 and 144: Fig. 8.1 - Three small dams in casc
Page 145 and 146: Social Disruption low (rural area)
Page 147 and 148: Fig. 8.4 - Flood water level after
Page 149: 8.9 REFERENCES [1] BURREC (1994) -
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SMALL DAMS PETITS BARRAGES

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