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
In systematic four types of relationships are studied and they are: a) Relationships of phylogeny (evolutionary descent) or the degree to which two organisms are thought to be r

Properties and Functions of Synapses There is an interval between depolarisation of the presynaptic terminal and the earliest appearance of a postsynaptic response. This inter

Explain about Regenerative therapy   Is also used to achieve the above objectives but with the ultimate goal of regeneration of lost bone tissue.

PSYCHOPHARMACOLOGY: Psychotropic drugs are drugs used for mentally ill patients for psychotic and neurotic condition.  1)  Antipsychotic or Neuroleptic Drugs and Anti-parki

What are the two divisions of meiosis? What are the main events that happen in those divisions? Meiosis is divided into first meiotic division, or meiosis I, and second meiotic

Nature: Matter and Energy Nature is not just our immediate surrounding or environment, but is the whole Universe of Cosmos. Study of the origin   and topography of cosmos is ca

1. In chickens rose comb ( R ) is dominant over single comb ( r ). A rose-combed male is mated to a rose-combed female. Eighteen chicks are produced, ten of which are rose-combed,

Define Comprehensive Dietary Management Regime of Patient? A comprehensive dietary management regime of the patient should be based on the patient profile as gathered pre and p

Induction of hydrolases - Responses to Infection Plants do respond to attack by pathogens. To restrict their spread the cells synthesise and secrete enzymes to hydrolyse the c

Bomb calorimeter is used to determine the calorific value of solid and liquid fuels. Construction          It consists of following parts 1.      Stainless steel bomb: