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Grassed waterway in Velm, Belgium, during a sunny day. A grassed waterway is a 2-metre (6.6 ft) to 48-metre-wide (157 ft) native grassland strip of green belt.It is generally installed in the thalweg, the deepest continuous line along a valley or watercourse, of a cultivated dry valley in order to control erosion.
Grassed waterway through a field in Missouri. A grassed waterway reduces soil erosion and captures most nutrients and pesticides that would normally wash out of crop fields and into major waters. These waterways help to carry surface water at a non-erosive velocity to an area where it will have a stable outlet. [1]
In the 1980s and 1990s, this marshland was drained by upstream dams and water control structures, down to 10% of the original area. [27] The marshland is located on the intercontinental flyway of migratory birds and is used by two-thirds of West Asia's water fowl. [27] The marsh is currently dominated by an invasive grass, Phragmites australis ...
Vernal pools are a type of marsh found only seasonally in shallow depressions in the land. They can be covered in shallow water, but in the summer and fall, they can be completely dry. In western North America, vernal pools tend to form in open grasslands, [11] whereas in the east, they often occur in forested landscapes. [12]
This archetypal form of swale is a dug-out, sloped, often grassed or reeded "ditch" or "lull" in the landform. One option involves piling the soil onto a new bank on the still lower slope, in which case a bund or berm is formed, mitigating the natural (and often hardscape-increased ) risks to slopes below and to any linked watercourse from ...
Hint: The first one can be found in the top-half of the board. Here are the first two letters for each word: BR. CA. ON. SO. EL. RA. AN (SPANGRAM) NYT Strands Spangram Answer Today.
A man in Germany thatching a roof using reeds. Phragmites australis, the common reed, is used in many areas for thatching roofs. In the United Kingdom, common reed used for this purpose is known as "Norfolk reed" or "water reed".
Researchers have found breaching is successful in around half of attempts, but great whites don’t use the technique very often. An adult great white shark can grow to around 20 feet long and ...