Does not cause negative flood impacts to other areas (both upstream and downstream):

This question is asking how important it is that the flood management option does not cause any adverse hydraulic flood impact to other areas. Some options may cause water to back-up causing flood waters to impact house upstream. While other options have no adverse impacts.

Concrete lined channels for example can potentially cause significant adverse flood impacts to other areas as they are designed to increase both the speed and amount of water flowing down a channel which could damage downstream assets.