Effective drainage is important in emergencies when there is a risk of flooding or there is a risk of poor environmental health conditions developing from standing water, muddy conditions, or erosion. It would not usually be the first priority in the initial stages of an emergency, but should be considered after the immediate water, sanitation and hygiene needs have been met. Sites which have natural slopes and drainage may not require additional work except in localised areas, such as providing cut off drains to prevent water from flowing into latrines or shelters.


Oxfam Technical Brief: Low cost drainage for emergencies

Surface Water Management in Humanitarian Contexts