Why are reservoirs kept full at times of flood?

Cause or Solution?: 
Causes of flooding
Question: 
I have a query about the Water Authorities reluctance to lower the level of the reservoirs before predicted storms. Supposedly because of the fear of drought in summer, is it also the case that there is too much peat in the run off from uplands during times of heavy rainfall? Keeping reservoirs full and diverting some peat-laden water along channels to the side may retain cleaner water and avoid a problematic cleansing process.
Name of Watercourse Referred To: 
Calder and tributaries
Location of Cause or Solution: 

Add new comment

CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.
Question Reference: 
78
Category: 
Reservoirs
Asked By: 
Kate
Mellor