Wadi Al Hayilah
Wadi Al Hayilah is a valley or dry river with ephemeral or intermittent flow, flowing mainly during the rainy season, located in the emirate of Ras Al Khaimah, in the eastern United Arab Emirates.
It forms a small sub-basin of belonging to the Wadi Bih drainage basin, which as a whole covers a large drainage area, with a surface area between and, divided between the territory of the UAE and Oman, and whose highest peak is Jabal Al Harim.
This sub-basin is bordered to the north and east by the Wadi Ar Ra'ilah; to the south by the Wadi Qada'ah; and to the west by the main course of Wadi Bih.
Course
Wadi Al Hayilah flows from southeast to northwest and has a total length of approximately.Its main source is located at an altitude of approximately above sea level, on the western slope of Jabal Qada'ah (minor), a secondary summit of the main peak, located away.
In its upper reaches, Wadi Al Hayilah descends with a considerable gradient, forming spectacular dry cascades in some places.
In its middle and lower reaches, there are some small farms and cultivated terraces, and almost at the mouth is the village of Al Hayilah, bordered by formidable cliffs or large rock faces that reach in height and attract the interest of climbers.
Dams and Reservoirs
Like other regions of the UAE, the Wadi Al Hayilah area has occasionally been affected by unusually heavy rainfall and flooding, but so far no dams have been built on its channel.Toponymy
Alternative names: Wadi Al Hayilah, Wadi Hijailah, Wadi Hijaila, Wadi Al Hila, Wadi Hila.The name of Wadi Al Hayilah, its tributaries, mountains and nearby towns was recorded in the documentation and maps produced between 1950 and 1960 by the British Arabist, cartographer, military officer and diplomat Julian F. Walker, during the work carried out to establish the borders between the then called Trucial States, later completed by the UK Ministry of Defence, with 1:100,000 scale maps published from 1971 onwards.
In the National Atlas of the United Arab Emirates it appears as Wādī Al Hayīlah.