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LECA is usually produced in different sizes and densities from 0.1 millimetres (0.004 in) up to 25 millimetres (1.0 in), commonly 0–4 mm, 4–10 mm, 10–25 mm and densities of 250, 280, 330, and 510 kg/m 3. LECA boulder is the biggest size of LECA with 100–500 mm size and 500 kg/m 3 density.
Bangladesh's largest opposition party, the Bangladesh Nationalist Party, denounced the Chhatra League attacks on the protesters. [398] The Left Democratic Alliance also denounced the suppressions saying, "the government is delivering provocative speeches instead of recognizing logical changes in the quota system." [399]
A simplified version of the Emerson soil dispersion test [3] can be completed in the field on a 20-minute to two-hour timescale. Laboratory tests used to diagnose a soil as dispersive focus on the cation exchange capacity of a soil sample and its cation breakdown. Soil cations are dominated by Ca 2+, Mg 2+, K +, and Na +, as well as H + in ...
The coastal region of Bangladesh is especially prone to cyclones. [28] Between 1793 and 1996, there has been one cyclone about every 4.5 years. This has a detrimental effect on the local environment, as well as on families and their property. For instance, a cyclone that hit in 1970 caused 300,000 deaths and US$86.4 million of property damage. [28]
Bangladesh map of Köppen climate classification zones. Heavy rainfall is characteristic of Bangladesh, causing it to flood every year. Except for the relatively dry western region of Rajshahi, where the annual rainfall is about 1,600 mm (63.0 in), most parts of the country receive at least 2,300 mm (90.6 in) of rainfall per year. Because of ...
Of all his work his best known is the small volume published in 1985 Political Economy of Soil Erosion in Developing Countries. [2] In this book, and elsewhere, he argues that soil erosion should not only, or even mainly, be thought of as being the result of mismanagement, overpopulation or for environmental reasons but can often be due to the effects of political economy on poor farmers.
The jet erosion test (JET), or jet index test, is a method used in geotechnical engineering to quantify the resistance of a soil to erosion. The test can be applied in-situ after preparing a field site, or it can be applied in a laboratory on either an intact or a remolded soil sample .
M Amirul Islam (1918-2001) was a Bangladesh academic, researcher, and scientist. He developed the Seven Soil Tracts system, a classification of the soil of Bangladesh, which is the foundation of agriculture and soil management in Bangladesh.