Water stagnation occurs when
waterstops flowing. Stagnant water can be a major environmental hazard.
Malariaand dengueare among the main dangers of stagnant water, which can become a breeding ground for the mosquitoesthat transmit these diseases.
Stagnant water can be dangerous for drinking because it provides a better incubator (than running water) for many kinds of
bacteria, and other parasites.
Causes and prevention
Stagnant water may be classified into the following basic, although overlapping, types:
Water bodystagnation: stagnation in lakes, lagoons, rivers, etc.
*Trapped water stagnation. The water may be trapped in human artifacts (discarded cans, plant pots, tires, dug-outs, roofs, etc.), as well as in natural containers, such as hollow tree trunks,
leaf sheaths, etc.
To avoid ground and surface water stagnation,
drainageof surface and subsoilis advised. Areas with a shallow water tableare more susceptible to ground water stagnation due to the lower availability of natural soil drainage.
Excessive watering may cause ground or surface water stagnation.
Life that may thrive in stagnant water
Some plants prefer flowing water, while others, such as lotuses, prefer stagnant water.
bacteriaare commonly found in stagnant water.
Purple bacteria(both sulfur and non-sulfur)
Siamese fighting fish
Stagnant water is the favorite breeding ground for a number of
*A number of species of
frogs prefer stagnant water.
*Some species of
Pools of stagnant water have historically been used in the processing of
hempand some other fiber crops, as well as of linden barkused for making bast shoes. Several weeks of soaking makes bast fibers easily separable due to bacterial and fermentative processes known as retting.
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