Water stagnation
Water stagnation occurs when
water stops flowing. Stagnant water can be a majorenvironmental hazard .Dangers
Malaria anddengue are among the main dangers of stagnant water, which can become a breeding ground for themosquitoes that 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 otherparasite s.Causes and prevention
Stagnant water may be classified into the following basic, although overlapping, types:
*
Water body stagnation: stagnation inlake s,lagoon s,river s, etc.
*Surface andground water stagnation
*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 sheath s, etc.To avoid ground and surface water stagnation,
drainage of surface andsubsoil is advised. Areas with a shallowwater table are 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.
Bacteria
Various anaerobic
bacteria are commonly found in stagnant water.
*Denitrifying bacteria
*Purple bacteria (both sulfur and non-sulfur)
*Leptospira Fish
*
Northern snakehead fish
*Siamese fighting fish
*Pygmy gourami
*Spotted barb
*Lepisosteidae (gar)
*Walking catfish Insects
Stagnant water is the favorite breeding ground for a number of
insect s.
*Mosquito larvae
*Fly maggots
*Dragonfly nymphs
*Nepidae (water scorpions)Other
*A number of species of
frog s prefer stagnant water.
*Algae
*Biofilm
*Some species ofturtle s
**Mata mata Miscellanea
Pools of stagnant water have historically been used in the processing of
hemp and some otherfiber crops , as well as oflinden bark used for makingbast shoe s. Several weeks of soaking makesbast fiber s easily separable due to bacterial and fermentative processes known asretting .ee also
*
Water pollution
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