What aspect of water management does detention facilities address?

Detention facilities are specifically designed to manage stormwater runoff, primarily focusing on flood control. These structures temporarily hold water during and after a rainfall event, allowing it to be released slowly into the drainage system or natural water bodies. This controlled release helps to prevent sudden surges of water that can lead to flooding downstream.

While detention facilities also contribute to other water management aspects, such as surface runoff management by regulating the flow rates, their primary purpose is to mitigate the risk of flooding caused by intense precipitation events. They achieve this by balancing the volume and timing of stormwater runoff, ultimately protecting properties and infrastructure from flood damage.

The other mentioned aspects, like contamination control or storage of toxic wastes, are not the main functions of detention facilities. These structures do not inherently address water quality issues related to contamination but rather focus on hydraulic performance and the timing of stormwater release.