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  2. Environmental impact of concrete - Wikipedia

    en.wikipedia.org/wiki/Environmental_impact_of...

    Concrete is used to create hard surfaces which contribute to surface runoff that may cause soil erosion, water pollution and flooding. Conversely, concrete is one of the most powerful tools for proper flood control, by means of damming, diversion, and deflection of flood waters, mud flows, and the like.

  3. Structural Soil - Wikipedia

    en.wikipedia.org/wiki/Structural_Soil

    In 1999, AMEREQ signed a licensing agreement with Cornell University and currently holds the patent rights to Cornell’s CU-Structural Soil Urban Tree Planting Mix. It is marketed as CU-Structural Soil for quality control and is produced by a network of qualified AMEREQ-licensed companies. CU-Structural Soil on average costs $35–$42 per ton ...

  4. Topsoil - Wikipedia

    en.wikipedia.org/wiki/Topsoil

    The United States loses almost 3 tons of topsoil per acre per year. [16] 1 inch (2.5 cm) of topsoil can take between 500 [17] and 1,000 years [18] to form naturally, making the rate of topsoil erosion a serious ecological concern. Based on 2014 trends, the world has about 60 years of topsoil left.

  5. Soil - Wikipedia

    en.wikipedia.org/wiki/Soil

    CEC is the amount of exchangeable hydrogen cation (H +) that will combine with 100 grams dry weight of soil and whose measure is one milliequivalents per 100 grams of soil (1 meq/100 g). Hydrogen ions have a single charge and one-thousandth of a gram of hydrogen ions per 100 grams dry soil gives a measure of one milliequivalent of hydrogen ion.

  6. Desalination - Wikipedia

    en.wikipedia.org/wiki/Desalination

    The facility would produce 190,000 cubic metres of drinking water per day, enough to supply about 100,000 homes. [169] As of June 2012, the cost for the desalinated water had risen to $2,329 per acre-foot. [170] Each $1,000 per acre-foot works out to $3.06 for 1,000 gallons, or $0.81 per cubic meter. [171]

  7. Water pricing - Wikipedia

    en.wikipedia.org/wiki/Water_pricing

    Prices for piped water supply provided by utilities, be they publicly or privately managed, are determined administratively (see water tariffs). They vary from US$0.01 to almost US$8 per cubic meter (including sewer tariffs). Portland 2.17 gallons cost $0.01 [3]

  8. Physical properties of soil - Wikipedia

    en.wikipedia.org/wiki/Physical_properties_of_soil

    The specific heat of pure water is ~ 1 calorie per gram, the specific heat of dry soil is ~ 0.2 calories per gram, hence, the specific heat of wet soil is ~ 0.2 to 1 calories per gram (0.8 to 4.2 kJ per kilogram). [90] Also, a tremendous energy (~584 cal/g or 2442 kJ/kg at 25 °C) is required to evaporate water (known as the heat of ...

  9. Embankment (earthworks) - Wikipedia

    en.wikipedia.org/wiki/Embankment_(earthworks)

    To reduce the metal cost of the bridge here it is further supported by erecting metal piers. An embankment is a raised wall, bank or mound made of earth or stones, that are used to hold back water or carry a roadway. A road, railway line, or canal is normally raised onto an embankment made of compacted soil (typically clay or rock-based) to ...

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