enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Water conservation - Wikipedia

    en.wikipedia.org/wiki/Water_conservation

    United States 1960 postal stamp advocating water conservation. Water conservation aims to sustainably manage the natural resource of fresh water, protect the hydrosphere, and meet current and future human demand. Water conservation makes it possible to avoid water scarcity. It covers all the policies, strategies and activities to reach these aims.

  3. Water balance - Wikipedia

    en.wikipedia.org/wiki/Water_balance

    [2] [3] In hydrology, a water balance equation can be used to describe the flow of water in and out of a system. A system can be one of several hydrological or water domains, such as a column of soil, a drainage basin, an irrigation area or a city. The water balance is also referred to as a water budget. Developing water budgets is a ...

  4. Marginal abatement cost - Wikipedia

    en.wikipedia.org/wiki/Marginal_abatement_cost

    The way that marginal abatement cost curves are usually built has been criticized for lack of transparency and the poor treatment it makes of uncertainty, inter-temporal dynamics, interactions between sectors and ancillary benefits. [3] There is also concern regarding the biased ranking that occurs if some included options have negative costs.

  5. Universal Soil Loss Equation - Wikipedia

    en.wikipedia.org/wiki/Universal_Soil_Loss_Equation

    The Universal Soil Loss Equation (USLE) is a widely used mathematical model that describes soil erosion processes. [1]Erosion models play critical roles in soil and water resource conservation and nonpoint source pollution assessments, including: sediment load assessment and inventory, conservation planning and design for sediment control, and for the advancement of scientific understanding.

  6. Externality - Wikipedia

    en.wikipedia.org/wiki/Externality

    The marginal private benefit of getting the vaccination is less than the marginal social or public benefit by the amount of the external benefit (for example, society as a whole is increasingly protected from smallpox by each vaccination, including those who refuse to participate).

  7. Marginal utility - Wikipedia

    en.wikipedia.org/wiki/Marginal_utility

    Marginal considerations are considerations which concern a slight increase or diminution of the stock of anything which we possess or are considering. [4] Another way to think of the term marginal is the cost or benefit of the next unit used or consumed, for example the benefit that you might get from consuming a piece of chocolate.

  8. Shewhart individuals control chart - Wikipedia

    en.wikipedia.org/wiki/Shewhart_individuals...

    In statistical quality control, the individual/moving-range chart is a type of control chart used to monitor variables data from a business or industrial process for which it is impractical to use rational subgroups. [1] The chart is necessary in the following situations: [2]: 231

  9. Maximum sustainable yield - Wikipedia

    en.wikipedia.org/wiki/Maximum_sustainable_yield

    The equation for figure 2 is the differential of equation 1.1 (Verhulst's 1838 growth model): [12] = (equation 1.2) can be understood as the change in population (N) with respect to a change in time (t). Equation 1.2 is the usual way in which logistic growth is represented mathematically and has several important features.