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The Iquitos várzea (NT0128) is an ecoregion of flooded forest along rivers in Brazil, Peru and Bolivia in the west of the Amazon biome. The forest is seasonally flooded up to 7 metres (23 ft) by whitewater rivers carrying nutrient-rich sediment from the Andes. The meandering rivers often shift course, creating a complex landscape of oxbow ...
Freshwater swamp forests are a relatively understudied forest type in Southeast Asia, primarily because they are difficult to access and can harbor diseases spread by insects, such as mosquitoes. [35] In the Amazon Basin of Brazil, a seasonally flooded forest is known as a várzea, and refers to a whitewater-inundated forest.
The controlled flooding of underground mines usually follows these guidelines: [citation needed] Removal of potential water hazards; Fill the surfaces that might collapse during or after the flooding process; Install water diversion systems; Install, at both the surface and underground, a system to monitor hydrogeological and geotechnical aspects
In 1828 the Commissioners for Sewers ordered a series of maps of the Caldicot and Wentloog Levels from Thomas Morris, a surveyor based in Newport. [8] In 1884, the Caldicot and Wentlooge Level Act established a new body, the Monmouthshire Commissioners of Sewers, with responsibility for maintaining sea walls and roads in the Levels.
Half of the ecoregion is in use for agriculture. About 20% is forested, mostly in deciduous trees due to the seasonal flooding. Two types of forests are associated with the Tonle Sap floodplains: a stunted swamp forest around the lake (about 10% of the area), and a short tree shrubland for the larger outlying areas. [1]
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A várzea forest is a seasonal floodplain forest inundated by whitewater rivers that occurs in the Amazon biome. [ 1 ] [ 2 ] Until the late 1970s, the definition was less clear and várzea was often used for all periodically flooded Amazonian forests.
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