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!
Gigi Hadid and Zayn Malik Dating. Zayn Malik and Gigi Hadid have been dating since Nov 2015. Zayn Malik is a 23 year old English Singer. Born Zayn Javaad Malik on 12th January, 1993 in East Browling, Bradford, England, UK and educated at Tong High School, Bradford, he is famous for One Direction in a career that spans 2010-present. His zodiac sign is Capricorn. Gigi Hadid is a 21 year old American Model.