Dhaid, or Al Dhaid, is the capital of the central district of the Emirate of Sharjah in the United Arab Emirates. An oasis town, it has extensive irrigated date palm plantations with water channeled from the nearby Hajar mountains at least in part through ancient tunnels dug for that purpose, known as aflaj in Arabic (falaj in the singular).Dhaid has long occupied a strategic location in the mouth of the important Wadi Siji.