WASH Cluster – Emergency Training DR 1 DR3 1 DRAINAGE Session 3 Site Conditions

WASH Cluster – Emergency Training DR 2 Disposal methods Into the ground: soakaways and infiltration trenches (check the infiltration capacity of soil) ‏ Into the air: evaporation pans and gardens (check evaporation rates) ‏ Into a less critical area: (make sure you know where the water goes) ‏ DR3

WASH Cluster – Emergency Training DR 3 SOIL CONDITIONS Determine soil type Clay soils are more impermeable than sandy soils make trial pit for soakage test, check water table depth DR3

WASH Cluster – Emergency Training DR 4 Soakaway pit Commonly between 2-5 m deep and 1 to 2.5 m diameter. Commonly not lined and filled with stones and blocks At least 30 m horizontal distance from any groundwater source (e.g. well or borehole). The base at least 1.5 m above the water table. DR3

WASH Cluster – Emergency Training DR 5 Grease trap Piped drains Open Channel Infiltration Trenches DR3 Other Drainage solutions