==Suitable conditions==
{{Climate_change
|heading1=Drought effects on cement
|text1='''Effects of drought''': Badly made concrete or cracked linings (e.g. in tanks, dams, waterways, wells, and other structures). <br>'''Underlying causes of effects''': Less water used for curing; Impure water used for mixing. <br>'''To increase resiliency of WASH system''': Ensure adequate mixing, ratios, purity of ingredients; Minimize water content in mixture; Ensure adequate curing.
}}
On the banks of rivers and lakes.
Problems can arise if the river bed is unstable (for example, gravel), or the river is very shallow at low flows. It can be difficult to set the intake level to be safe from silting up during floods, but still able to abstract water at low flows. A [[Tyrolean weir]] can assist with this or a floating intake can be used.
==Resilience to changes in the environment==
====Drought effects on cement====
'''Effects of drought''': Badly made concrete or cracked linings (e.g. in tanks, dams, waterways, wells, and other structures). <br>
'''Underlying causes of effects''': Less water used for curing; Impure water used for mixing. <br>
'''To increase resiliency of WASH system''': Ensure adequate mixing, ratios, purity of ingredients; Minimize water content in mixture; Ensure adequate curing.
==Construction, operations and maintenance==
Operation is usually carried out by a caretaker. The sump must be checked daily for sufficient water inflow; any debris obstructing it must be removed, and any damage repaired. Most of the maintenance will be to the pump. The intake itself needs some cleaning and de-silting. If it caves in, or if the river or lake bank erodes, repairs have to be made. A sump inlet does not require special organizational arrangements.
[[File:SumpIntakeOM.jpg|thumb|center|600px|Chart: WHO.]]
====Potential problems====
