Aquifers Properties: Porosity (n) The porosity of a soil or rock is that fraction of a given volume of material that is occupied by void space, or interstices. Porosity, indicated by the symbol ( n ), is usually expressed as the ratio of the volume of voids. Most rocks naturally contain a certain percentage of voids that can be occupied by water. Fig. 1 Porosity (n)
A loner is a person who avoids or does not actively seek human interaction or prefers to be alone, (wikipedia). What if the loner become a scientist? I think understanding loner scientists reaction with live and their communications to people near them is so hard, but if we realized that there are a kind of scientist need to be more lonely to think better, they're need extraordinary live style. Could that be better to give those kind of scientist a space/good place to invent and make the earth a better place? I listed the following movies to give a nice example about Loner scientist because I believe in the impact of movies on the public. 1- Into the Wild After graduating from Emory University, top student and athlete Christopher McCandless abandons his possessions, gives his entire $24,000 savings account to charity and hitchhikes to Alaska to live in the wilderness... more http://youtu.be/2LAuzT_x8Ek 2- A Beautiful Mind After a brilliant but asocial mathemat...
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