Mushrooms Image via Wikipedia The White Desert is located at the northern region of the Farafra Oasis . I had visited it within field trip to western desert. The white desert has been classified by government of Egypt as a natural protected zone in 2002 and covers an area of 3010 square kilometers. It's far 570 km from Cairo. The White desert is a unique geological phenomenon; where wind and water erosion sculptured their way through the soft chalk forming incredible shapes "Mushrooms". Along the road Baharia - Farafra, the main geological observations as many isolated hills and hillocks consisting almost of massive bedded, snow white chalk of Maastrichtian Khoman Formation. There are many fascinating geomorphologic feature accompanied the carbonate rocks of the plateau surface such as cave deposits and onyx,
Our funny crew showing broken carbide bit after a troubles while drilling in a hard dolomite in North Sinai, Egypt in a mission to reach the Nubian aquifer. http://youtu.be/KhTy0UoVa40 Drilling on earth have a lot of problem, I wonder what kind of machines and equipment we need to drill on the Mars in case of exploring for groundwater? :) http://youtu.be/6sk5IuIjr1E
Aquifers Properties: Specific Yield and Specific Retention In an aquifer with a water table (unconfined aquifer), the volume of water released from groundwater storage per unit surface area of aquifer per unit decline in the water table is known as the specific yield, S y . also known as the drainable porosity. Hydrologists divide water in storage in the ground into the part that will drain under the influence of gravity (called specific yield) and the part that is retained as a film on rock surfaces and in very small openings (called specific retention). The physical forces that control specific retention are the same forces involved in the thickness and moisture content of the capillary, fringe. fig.1
Comments
Post a Comment