Flood control in the context of "Brays Bayou"

A floodplain or flood plain or bottomlands is an area of land adjacent to a river. Floodplains stretch from the banks of a river channel to the base of the enclosing valley, and experience flooding during periods of high discharge. The soils usually consist of clays, silts, sands, and gravels deposited during floods.

Because of regular flooding, floodplains frequently have high soil fertility since nutrients are deposited with the flood waters. This can encourage farming; some important agricultural regions, such as the Nile and Mississippi river basins, heavily exploit floodplains. Agricultural and urban regions have developed near or on floodplains to take advantage of the rich soil and freshwater. However, the risk of inundation has led to increasing efforts to control flooding.

Yellow River civilization, Huanghe civilization or Huanghe Valley civilization (Chinese: 黃河文明), Hwan‐huou civilization is an ancient Chinese civilization that prospered in the middle and lower basin of the Yellow River. Agriculture was started in the flood plain of the Yellow River, and before long, through flood control and the irrigation of the Yellow River, cities were developed and political power found reinforcement. One of the "four major civilizations of the ancient world", it is often included in textbooks of East Asian history, but the idea of including only the Yellow River civilization as one of the four biggest ancient civilizations has become outdated as a result of the discovery of other early cultures in China, such as the Yangtze and Liao civilizations. The area saw the Yangshao and Longshan cultures of the Neolithic era and developed into the bronze ware culture of the Shang and Zhou dynasties.

Canals or artificial waterways are waterways or engineered channels built for drainage management (e.g. flood control and irrigation) or for conveyancing water transport vehicles (e.g. water taxi). They carry free, calm surface flow under atmospheric pressure, and can be thought of as artificial rivers.

In most cases, a canal has a series of dams and locks that create reservoirs of low speed current flow. These reservoirs are referred to as slack water levels, often just called levels. A canal can be called a navigation canal when it parallels a natural river and shares part of the latter's discharges and drainage basin, and leverages its resources by building dams and locks to increase and lengthen its stretches of slack water levels while staying in its valley.

A flood is an overflow of water (or rarely other fluids) that submerges land that is usually dry. In the sense of "flowing water", the word may also be applied to the inflow of the tide. Floods are of significant concern in agriculture, civil engineering and public health. Human changes to the environment often increase the intensity and frequency of flooding. Examples for human changes are land use changes such as deforestation and removal of wetlands, changes in waterway course or flood controls such as with levees. Global environmental issues also influence causes of floods, namely climate change which causes an intensification of the water cycle and sea level rise. For example, climate change makes extreme weather events more frequent and stronger. This leads to more intense floods and increased flood risk.

Natural types of floods include river flooding, groundwater flooding coastal flooding and urban flooding sometimes known as flash flooding. Tidal flooding may include elements of both river and coastal flooding processes in estuary areas. There is also the intentional flooding of land that would otherwise remain dry. This may take place for agricultural, military, or river-management purposes. For example, agricultural flooding may occur in preparing paddy fields for the growing of semi-aquatic rice in many countries.

Ecosystem services are the various benefits that humans derive from ecosystems. The interconnected living and non-living components of the natural environment offer benefits such as pollination of crops, clean air and water, decomposition of wastes, and flood control.

Ecosystem services are grouped into categories of services, which was popularized in the early 2000s by the Millennium Ecosystem Assessment (MA) initiative by the United Nations. How these groups are defined varies dependent on classification system. The MA groups the services into four broad categories of services. These are provisioning services, such as the production of food and water; regulating services, such as the control of climate and disease; supporting services, such as nutrient cycles and oxygen production; and cultural services, such as recreation, tourism, and spiritual gratification.

Yu the Great or Yu the Engineer was a legendary king in ancient China who was credited with "the first successful state efforts at flood control", his establishment of the Xia dynasty, which inaugurated dynastic rule in China, and for his upright moral character. He figures prominently in the Chinese legend titled "Great Yu Controls the Waters" (大禹治水; Dà Yǔ zhì shuǐ). Yu and other sage-kings of ancient China were lauded for their virtues and morals by Confucius and other Chinese teachers. He is one of the few Chinese monarchs who is posthumously honored with the epithet "the Great".

There is no contemporary evidence of Yu's existence as traditionally attested in the Shiji. Yu is said to have ruled as sage-king during the late 3rd millennium BC, which predates the oracle bone script used during the late Shang dynasty—the oldest known form of writing in China—by nearly a millennium. Yu's name was not inscribed on any artifacts which were produced during the proposed era in which he lived, nor was it inscribed on the later oracle bones; his name was first inscribed on vessels which date to the Western Zhou period (c. 1045 – 771 BC).

A levee (/ˈlɛvi/ or /ˈlɛveɪ/), dike (American English), dyke (Commonwealth English), embankment, floodbank, or stop bank is an elevated ridge, natural or artificial, alongside the banks of a river, often intended to protect against flooding of the area adjoining the river. It is usually earthen and often runs parallel to the course of a river in its floodplain or along low-lying coastlines.

Naturally occurring levees form on river floodplains following flooding. Sediment and alluvium are deposited on the banks and settle, forming a ridge that increases the river channel's capacity. Alternatively, levees can be artificially constructed from fill, designed to regulate water levels. In some circumstances, artificial levees can be environmentally damaging.