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Published byJudith Runnells Modified over 2 years ago

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WASH Cluster – Emergency Training DR 1 DR4 1 DRAINAGE Session 4 Drainage Solutions

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WASH Cluster – Emergency Training DR 2 Design exercise Task: Calculate the dimensions of a soakaway pit to drain wastewater from a communal shower area. A. In your groups, list the information you need to be able to do the calculation B. Do your assessment (ask the trainer the questions) C. Do the calculation DR4

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WASH Cluster – Emergency Training DR 3 Answer Following …. Session Number here 3

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WASH Cluster – Emergency Training DR 4 Exercise answer Quantity of wastewater: 10 families X 20 l water / family / day = 200 l of water / day Infiltration capacity of soil (loam): 18 l/m 2 /day Infiltration surface area required: 200 divided by 18 = 11 m 2 If the soakaway pit has a rectangular section 1m x 2m, it needs to be this deep: 11m 2 divided by 6m = Approximately 2m. 1 m 2 m DR4

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WASH Cluster – Emergency Training DR 5 SOAKAWAY, what is wrong here? DR4 Photo courtesy of John Adams

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WASH Cluster – Emergency Training DR 6 Group Work In your group each person chooses one drainage option below Champion your drainage solution and debate amongst the group; The pros and cons of the drainage option When would you use this solution? OUTLET TO WATERCOURSESOAKAWAY INFILTRATION TRENCHOPEN CHANNEL EVAPORATION PANSPIPES/SEWERS DR4

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