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!
Things appear to be getting really serious between Gigi Hadid and Zayn Malik. On Friday, the 22-year-old model's mom, Yolanda Hadid took to Instagram to share a photo of herself with her daughter, Zayn and Zayn's mom, Trisha Malik, who appeared to have been visiting from the UK.