Detention ponds help control the rate of flow by using a control device that maintains the pre-development rate of flow. The volume of the detention pond is calculated by comparing the pre- and post- development runoff volumes. The difference is the detention volume.
Zayn Malik & Gigi Hadid: Why He Loves Dating Her Even More Than Perrie Edwards. Poor Perrie Edwards. Not only is Zayn Malik happy with his new girlfriend, Gigi Hadid, but he loves her even more than the Little Mix singer, HollywoodLife.com has EXCLUSIVELY learned. Find out why!
Although Perrie and Zayn were on different seasons of the UK's hit show, they hit it off immediately after they met. After dating for about two years, they announced their engagement in August 2013 while at the premiere of his This Is Us film, but have since made no wedding plans and are enjoying a long engagement.