Surface water sources and charactersitics, Biology

Most of the surface water originates directly from precipitation in the form of rainfall or snow. Ground water from springs also contributes to the flow of most of the streams. The various surface water sources along with their characteristics are discussed below:

Natural lakes and ponds:

Lakes are inland depression that holds standing fresh water throughout the year eg-lake superior, Caspian Sea, etc. Ponds are small temporary or permanent shallow water bodies. Their water is much more accessible than ground water or glaciers and uniform in quality than water received from rivers and streams.

Artificial reservoir:

These are formed by constructing hydraulic structures (like dams) across river valleys. The deeper and narrower the valley is. The easier it is to construct the dam. The water quality is similar to that of natural lakes and ponds.

Rivers and streams:

Water that does not evaporate runs off the surface towards the sea in the forms of streams and rivers. Water from these sources is generally more variable in quality as well as less satisfactory than the water from lakes and impounded reservoirs. The quality of river water and that of streams depends on various factors like the character and area of the watershed, its geology and topography, seasonal variations and weather conditions disposal of sewage and industrial effluents.

Sea water:

Though oceans contain about 97% of the total water in the world, but the high concentration of salts in sea water (about 3.5%) makes  it unfit for human consumption . the places where sea water is the  only source available, potable water is obtained from sea water by carrying out desalting or demineralizing . for eg. In Persian Gulf and in ships on the high seas.

Characteristics of surface water:

The quality of surface water changes with climate and weather conditions. It also varies with regions. It contains lot of sand due to the streaming action of water which erodes rocky surface producing sand. It also contains oxygen, inorganic nutrients and various forms of life like algae, fungi, bacteria, small insects and fishes.

Posted Date: 7/11/2012 8:22:55 AM | Location : United States







Related Discussions:- Surface water sources and charactersitics, Assignment Help, Ask Question on Surface water sources and charactersitics, Get Answer, Expert's Help, Surface water sources and charactersitics Discussions

Write discussion on Surface water sources and charactersitics
Your posts are moderated
Related Questions
Q How does water move in sponges? What is the function of the pores in these animals? Sponges are filtering beings they make water enter their bodies by their lateral pores. Wa

Explain which is better to grow plants in Rock sand or soil? Ans) When we grew plants inside, with no wind, and the plants in the rocks grew superior to the plants that were gr

Regulation of Respiration Whenever the need for oxygen in the body increases, ventilation of the respiratory organs also increases. In the same way whenever the level of oxyge

Habits: Any abnormal habits needs to be identified. Following habits may have detrimental effect on the implant: 1. Parafunction -  Bruxism/ Clenching 2. Tongue Thrusting

Q. What is Atrial Extrasystoles? Atrial premature beats often occur at lower workloads and have little significance. As exercise increases, they usually subside and may then re

indicator for testing for the presence of sugar

What is the significance of the -R group (variable radical) in an amino acid molecule? The -R group, also known as a lateral chain, is the variable part of the amino acid molec

adaptation of the phylum protozoa to its function

A few statements about the mechanism of evolution are made. Mark the correct statements.   (i)  Evolution happens at the individual level as well as population level. (ii

Find the initial osmotic pressure at room temperature for a cell if the only ions present are KCl and NaCl on either side of the membrane. Assume the concentrations for K+ and Na+