SubSurface Dams - Sustainable Sanitation and Water Management ...

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Photo: Construction of the subsurface dam-Construction of the subsurface dam-The subsurface dam was constructed by excavating the aquifer layer up to the basement rock, <strong>and</strong>building a dam body. The pressed part in the photo is the dam body. Parallel to the construction ofthe dam body, the excavated space of both the upstream <strong>and</strong> downstream sides of it was backfilled.Finally, the dam body was completely buried under ground.
Atlantic Océan Atlantique OceanBURKINA FASONamentenga, NareOuagadougouProject locationFigure-1 Plan de situation pour le projet
Page 4 and 5: Subsurface DamSmall-Scale Surface D
Page 6 and 7: ContentsIntroduction1. General desc
Page 8 and 9: 1. General description of the Model
Page 10 and 11: Department of the Environmentand Fr
Page 12 and 13: According to the results of an anal
Page 14 and 15: A large amount of waterevaporates f
Page 16 and 17: y adopting an appropriate dam struc
Page 18 and 19: 2-5 "Fossil valley", a suitable sit
Page 20 and 21: temperature of 30 to 34 degrees and
Page 22 and 23: 3-3 Distribution of fossil valleys
Page 24 and 25: 3-4 Surveys carried out in this pro
Page 26 and 27: Satellite image of the area around
Page 28 and 29: 3-4-2 Field explorationAt the 5 sit
Page 30 and 31: 3-4-3 Geophysical surveyAt the 5 si
Page 32 and 33: Groundwater level assumed from the
Page 34 and 35: 3-5 Detailed field surveys (test dr
Page 36 and 37: Groundwater level isalmost the same
Page 38 and 39: The village is on a peneplain with
Page 40 and 41: In this project at Nare, the "earth
Page 42 and 43: DownstreamFilled back soil3mCoarseg
Page 44 and 45: All the results of the quality test
Page 46 and 47: Photo 4.3: Construction of the subs
Page 48 and 49: 4) Basal stratum of the fossil vall
Page 50 and 51: 6. Observation of the water storage
Page 52 and 53:
Table 6.1: Features of the faciliti
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PerchedwaterImpermeablelayer“Main
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Table 6.3: Annual rainfall in the K
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3) The reserved water level during
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Ground surface level: 275.73mGround
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6-4 Analysis of seasonal fluctuatio
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SandysiltSiltSand(white)Sand(moist)
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(1) Relation between the rainfall w
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4) Subsequently, the cycle in which
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7. Other studiesIn addition to the
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these facilities:- 3 mill stations,
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Photo 7.3: Water-supply station for
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8. Recommendations for future subsu
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advisable to arrange rainfall stati
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AcknowledgementsThe Model Project t
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SubSurface Dams - Sustainable Sanitation and Water Management ...

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