April 30, 2009
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Soil & Groundwater Newsletter April 30, 2009 |
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| This Week´s Featured News Stories |
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Landfill cover soil methane oxidation underestimated
Landfilled waste decomposes in the absence of oxygen and results in the production of methane. Landfills are classified as the second-largest human-made source of CH4 in the U.S. Additionally, landfill gas contains numerous non-methane hydrocarbons that are either volatilized directly from waste materials or produced through biochemical reactions during waste degradation. Microbial methane oxidation reduces the emissions of methane and other volatile hydrocarbons from landfills. Determining the importance of this process is one of the major uncertainties in estimating national or global CH4 emissions ... |
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Scientists develop improved groundwater forecasting model
Scientists in India have developed a more efficient computing model to predict monthly changes in groundwater, which is depleted in many areas of developing countries because of damaged soils and poor irrigation practices. A team of scientists based in India`s four southern states used the concept of an `artificial neural network` (ANN), a computing technique that mimics the way millions of neurons — responsive cells in the nervous system — process and analyse the myriad bits of signals they receive. An ANN contains highly interconnected single units called `neurones` into which data is fed ... |
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