Ground water, Biology

Ground Water

Ground water represents a major subterranean reservoir of fresh water. In general. it is not tapped by plants as it is too deep and does not suffer from loss due to evaporation. It slowly flows through the underground porous substratum from one place to another under the influence of gravity. Its flow may vary from a few millimetres to as much as a metre or so per day. At some places ground water reappears at the surface in the form of a spring. The zone of sub-surface formation that provides water to wells is called an aquifer. Some aquifers exhibit an unusually high hydrostatic pressure to force water upto the soil surface when a well is dug. Such a well from which water is pushed automatically to the soil surface is called an artesian well. In areas devoid of lakes and rivers ground water is the most important source of water.

A close examination of the global distribution of water resources reveals three important features. First, much of the water is stored on more or less permanent basis. The largest quantity of water is in the oceans. The Arctic and Antarctic ice masses, glaciers and lakes are also major water reservoirs not available to man. Second, some of the Earth's water is in constant flux represented by snow, rainfall, cloud drift and river flow towards the sea. Third, the water on land is very unevenly distributed.

Posted Date: 12/11/2012 12:06:07 AM | Location : United States

Related Discussions:- Ground water, Assignment Help, Ask Question on Ground water, Get Answer, Expert's Help, Ground water Discussions

Write discussion on Ground water
Your posts are moderated
Related Questions
Q. Which are the glands present in the epidermis of birds, reptiles and mammals? In the epidermis of reptiles and birds there are practically no glands. In mammals there are se

Define the Classification of Carbohydrates? If you go back and read up your theory, you will recall that there are four main classes of carbohydrates based on the number of mon

State the term - Neuropsychological Examination For a neuropsychological examination a battery of tests administered should include, at a minimum: Intelligence Tests

Tuberculosis Tuberculosis is a chronic infectious disease which is caused by a bacterium - Mycobacterium tuberculosis.  It affects the lungs most commonly but call gel localize

When constructing phylogenies using maximum likelihood methods, you assume?

The pH of a solution of 1 M HCl is: Select one: a. 0 b. 0.1 c. 1 d. 10 e. negative 1

How do mineral salts participate in enzymatic activity? Many mineral salts are cofactors of enzymes. i.e., they are substances without which enzymes do not work.

Structural classification of bone Macroscopically, bone tissue can be classified into two types, compact and trabecular bone. Compact bone is dense, corticated and makes up the

Q. What are the cells produced in the first stage of the embryonic development called? The cells that result from the cleavage (the first stage of the embryonic development) ar

define inflorescence and explain in detail about it''s types