Substance is floodwater, purpose is drainage. 

If the land floods, naturally from runoff  or by heavy rain, its still flooded.

The stations I'm tagging are for putting water over the levee when the river is 
high during a typhoon, so they can not open the normal outflow gate, as it is 
below the rivers current level. 

Weather the purpose is standard drainage of a low lying area  or storm 
drainage, the "substance" still is "floodwater" right? 

Javbw  

Sent from my iPhone

> On Jul 19, 2015, at 4:50 PM, Volker Schmidt <[email protected]> wrote:
> 
> No, "floodwater" is not correct here. It's regular drainage we are talking 
> about, as the territory around here is artificially kept dry. Without the 
> pumping stations we would be living in swamps. Obviously the pumps would also 
> try to deal with floodwater in case of heavy precipitations upstream, but the 
> main purpose is drainage.
> I agree "drainage" would be better than "drain"
> 
> 
>> On 19 July 2015 at 02:49, John Willis <[email protected]> wrote:
>> Shouldn't be "drainage"? Perhaps flood_water would be a good choice
>> 
>> Javbw
>> 
>> Sent from my iPhone
>> 
>> > On Jul 19, 2015, at 7:48 AM, Volker Schmidt <[email protected]> wrote:
>> >
>> > "Drain" is missing
>> 
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