A puddle is a small accumulation of liquid, usually water, on a surface. It can form either by pooling in a depression on the surface, or by

surface tension Surface tension is the tendency of liquid surfaces at rest to shrink into the minimum surface area possible. Surface tension is what allows objects with a higher density than water such as razor blades and insects (e.g. water striders) to f ...

upon a flat surface. A puddle is generally shallow enough to walk through, and too small to traverse with a boat or raft. Small wildlife may be attracted to puddles.

Natural puddles and wildlife

Puddles in

natural landscape A natural landscape is the original landscape that exists before it is acted upon by human culture Culture () is an umbrella term which encompasses the social behavior, institutions, and norms found in human societies, as well as the kn ...

s and habitats, when not resulting from precipitation, can indicate the presence of a seep or spring. Small seasonal riparian plants, grasses, and wildflowers can germinate with the ephemeral "head start" of moisture provided by a puddle. Small wildlife, such as birds and insects, can use puddles as a source of essential moisture or for bathing. Raised constructed puddles, bird baths, are a part of domestic and wildlife gardens as a garden ornament and "micro-habitat" restoration. Swallows use the damp

loam Loam (in geology and soil science) is soil composed mostly of sand (particle size > ), silt (particle size > ), and a smaller amount of clay (particle size < ). By weight, its mineral composition is about 40–40–20% concentration of sand–sil ...

which gathers in puddles as a form of cement to help to build their nests. Many butterfly species and some other insects, but particularly male butterflies, need puddles for

nutrient A nutrient is a substance used by an organism to survive, grow, and reproduce. The requirement for dietary nutrient intake applies to animals, plants, fungi, and protists. Nutrients can be incorporated into cells for metabolic purposes or excret ...

s they can contain, such as salts and amino acids. In a behaviour known as

puddling A puddle is a small accumulation of liquid on a surface. Puddle or Puddles may also refer to: * Puddle, Cornwall, hamlet in England * ''Puddle'' (video game) * Puddle (M. C. Escher), a woodcut by M. C. Escher * Weld puddle, a crucial part of the ...

they seek out the damp mud that can be found around the edge of the puddles. For some smaller forms of life, such as tadpoles or mosquito larvae, a puddle can form an entire habitat. Puddles that do not evaporate quickly can become standing water, which can become polluted by decaying organisms and are often home to breeding mosquitos, which can act as vectors for diseases such as malaria and, of more recent concern in certain areas of the world, West Nile virus.

Puddles on roads

Puddles commonly form during rain, and can cause problems for transport. Due to the angle of the road, puddles tend to be forced by gravity to gather on the edges of the road. This can cause splashing as cars drive through the puddles, which causes water to be sprayed onto

pedestrian A pedestrian is a person traveling on foot, whether walking or running. In modern times, the term usually refers to someone walking on a road or pavement, but this was not the case historically. The meaning of pedestrian is displayed with ...

s on the pavement. Irresponsible drivers may do this deliberately, which, in some countries, can lead to prosecution for careless driving. Puddles commonly form in potholes in a dirt road, or in any other space with a shallow depression and dirt. In such cases, these are sometimes referred to as ''mud puddles'', because mud tends to form in the bottoms, resulting in dirtied wheels or boots when disturbed. In order to deal with puddles, roads and pavements are often built with a camber (technically called 'crowning'), being slightly convex in nature, to force puddles to drain into the gutter, which has

storm drain A storm drain, storm sewer (United Kingdom, United States, U.S. and Canada), surface water drain/sewer (United Kingdom), or stormwater drain (Australia and New Zealand) is infrastructure designed to Drainage, drain excess rain and ground water ...

grates to allow the water to drain into the sewers. In addition, some surfaces are made to be porous, allowing the water to drain through the surface to the aquifer below.

Physics

Due to the action of

, small puddles can also form if a liquid is spilt on a level surface. Puddles like this are common on kitchen floors. Puddles tend to

evaporate Evaporation is a type of vaporization that occurs on the surface of a liquid as it changes into the gas phase. High concentration of the evaporating substance in the surrounding gas significantly slows down evaporation, such as when humidi ...

quickly due to the high surface-area-to-volume ratio. In cold conditions puddles can form patches of ice which are slippery and difficult to see and can be a hazard to road vehicles and pedestrians.

Children

Puddles are a source of recreation for children, who often like jumping in puddles as an "up-side" to rain. A children's

nursery rhyme A nursery rhyme is a traditional poem or song for children in Britain and many other countries, but usage of the term dates only from the late 18th/early 19th century. The term Mother Goose rhymes is interchangeable with nursery rhymes. From t ...

records the story of

Doctor Foster Doctor Foster may refer to: * " Doctor Foster", an English nursery rhyme * ''Doctor Foster'' (TV series), a British television drama * Dr Foster Intelligence Dr Foster Intelligence is a provider of healthcare information in the United Kingdom, mo ...

and his encounter with a puddle in Gloucester. Muddy puddles, and the pleasures of splashing mud in them, are a repeated theme in the children's animation Peppa Pig, to the extent of selling character-branded wellington boots.

Puddle thinking

It has been fashionable for millennia, and continues to be fashionable in some circles, to believe the Universe is designed for humans. Some critics of this view reject it as

hubris Hubris (; ), or less frequently hybris (), describes a personality quality of extreme or excessive pride or dangerous overconfidence, often in combination with (or synonymous with) arrogance. The term ''arrogance'' comes from the Latin ', mean ...

anthropocentrism Anthropocentrism (; ) is the belief that human beings are the central or most important entity in the universe. The term can be used interchangeably with humanocentrism, and some refer to the concept as human supremacy or human exceptionalism. F ...

and argue instead that through the process of evolution it is humans that have adapted to or been shaped by the Universe. In his book '' The Salmon of Doubt'', Douglas Adams satirizes the belief that the universe is designed for humans:

Imagine a puddle waking up one morning and thinking, 'This is an interesting world I find myself in, an interesting hole I find myself in, fits me rather neatly, doesn't it? In fact, it fits me staggeringly well, must have been made to have me in it!' This is such a powerful idea that as the sun rises in the sky and the air heats up and as, gradually, the puddle gets smaller and smaller, it's still frantically hanging on to the notion that everything's going to be all right, because this World was meant to have him in it, was built to have him in it; so the moment he disappears catches him rather by surprise.

History

Medieval legend spoke of one man who was desperate to find building materials for his house, so he stole

cobblestone Cobblestone is a natural building material based on cobble-sized stones, and is used for pavement roads, streets, and buildings. Setts, also called Belgian blocks, are often casually referred to as "cobbles", although a sett is distinct fro ...

s from the road surface. The remaining hole filled with water and a horseman who later walked through the 'puddle' found himself drowning. A similar legend, of a young boy drowning in a puddle that formed in a

pothole A pothole is a depression in a road surface, usually asphalt pavement, where traffic has removed broken pieces of the pavement. It is usually the result of water in the underlying soil structure and traffic passing over the affected area. Water ...

in a major street in the early years of Seattle, Washington, is told as part of the

Seattle Underground Tour The Seattle Underground is a network of underground passageways and basements in the Pioneer Square neighborhood of Seattle, Washington, United States. They were located at ground level when the city was built in the mid-19th century but fell ...

Natural puddles and wildlife

Puddles on roads

Physics

Children

Puddle thinking

History

See also

References

Further reading