Hydrogeomorphic indications of the phenomenon of ascents and entrances, west of Tal Afar region

The Outlets and Entrances Phenomenon Consider Unique and Rarity Karstic Phenomenon, Especially in arid and semi arid area. Concluded studies Factors and Processes answerable from growth and Developm- ent this Phenomenon. To Derive from Initially Geologic factors, Climatic Situation and Topographic relief, as well as Studies Signifi- cances Hydrochimical and Geomorphic by Surveying and Laboratory Using Precious Mathematical Methods.The Studying to reach Specifi- cation Underground Stream and Connection Entrances with Outlets each other Distance more (9km), by Using Sawyer as concluded Specification speed activity of Karstic Dissolution which to reach average in Calcite rocks (28.9mm/1000years), While to reach (4336.1mm /1000 years) in Gypsum rocks, There by its to mach Parallel in Typical Karstic area in a world. As to be rise values anions and cations such as Calcium cations to reach(612mg/L) also Sulfer to reach (3000 mg/L).