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[1] While erosion is a natural process, human activities have increased by 10–40 times the rate at which soil erosion is occurring globally. [7] At agriculture sites in the Appalachian Mountains, intensive farming practices have caused erosion at up to 100 times the natural rate of erosion in the region. [8]
Dobbingstone Burn, Scotland—This photo illustrates two different types of erosion affecting the same place. Valley erosion is occurring due to the flow of the stream, and the boulders and stones (and much of the soil) that are lying on the edges are glacial till that was left behind as ice age glaciers flowed over the terrain.
The extent and location of haor basin. In a country where one third of all area can be termed as wetlands, [15] the haor basin is an internationally important [citation needed] wetland ecosystem, spread over Sunamganj, Habiganj, Moulvibazar districts and Sylhet Sadar Upazila, as well as Kishoreganj and Netrokona districts outside the core haor area.
There are two primary mechanisms of stream bank erosion: fluvial erosion and mass failure. Fluvial erosion is the direct removal of soil particles by flowing water. The rate of fluvial erosion is determined both by the force of the flowing water (e.g. faster flow equals more force) and the resistance of the bank material to erosion (e.g. clay is generally more resistant to erosion than sand).
The Hjulström curve, named after Filip Hjulström (1902–1982), is a graph used by hydrologists and geologists to determine whether a river will erode, transport, or deposit sediment. It was originally published in his doctoral thesis "Studies of the morphological activity of rivers as illustrated by the river Fyris. [1]" in 1935. The graph ...
Entrance to the National Museum of Science and Technology. The National Museum of Science and Technology (NMST) [1] (Bengali: জাতীয় বিজ্ঞান ও প্রযুক্তি জাদুঘর) in Dhaka, Bangladesh was founded on April 26, 1965, by the Pakistani government and became a part of Bangladesh's Ministry of Science and Technology following the Bangladesh ...
During the rainy season it stretches about 8–13 km (5–8 mi) from bank to bank. Even during the dry season when the waters subside, the breadth is seldom less than 3–5 km (2–3 mi). The Jamuna was a barrier in establishing a direct road link between the capital Dhaka and northern part of Bangladesh, better known as Rajshahi Division ...
Starting in 2010, every year free books are distributed to students between Grade-1 to Grade-10 to eliminate illiteracy. [6] These books comprise most of the curricula of the majority of Bangladeshi schools. There are two versions of the curriculum. One is the Bengali language version and the other one is English language version.