| water erosion (The breakdown of solid rock into smaller particles and its removal by water. As weathering, erosion is a natural geological process, but more rapid soil erosion results from poor land-use practices, leading to the loss of fertile topsoil and to the silting of dams, lakes, rivers and harbours. There are three classes of erosion by water. 1. Splash erosion occurs when raindrops strike bare soil, causing it to splash, as mud, to flow into spaces in the soil and to turn the upper layer of soil into a structureless, compacted mass that dries with a hard, largely impermeable crust. 2. Surface flow occurs when soil is removed with surface run-off during heavy rain. 3. Channelized flow occurs when a flowing mixture of water and soil cuts a channel, which is then deepened by further scouring. A minor erosion channel is called a rill, a larger channel a gully) |
vannerosjon |
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| water extraction (Pumping of water for different purposes (i.e. agriculture, land reclamation, domestic and industrial use, etc.)) |
vannuttak |
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| water flea (Fresh-water branchiopod crustaceans characterized by a transparent bivalve shell) |
vannloppe |
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| water for agricultural use (Water used in agriculture for irrigation and livestock. Livestock watering is only 1 percent of the total water withdrawal for agricultural use. Of all functional water uses, irrigation is the largest agricultural use of water) |
vann til bruk i landbruk |
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| water for consumption (Consumptive water use starts with withdrawal, but in this case without any return, e.g. irrigation, steam escaping into the atmosphere, water contained in final products, i.e. it is no longer available directly for subsequent use) |
forbruksvann |
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| water for industrial use (Water used by industries for purposes such as fabrication, processing, washing and cooling, which is obtained from a public supply or through self-supplied sources) |
industrivann |
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| water hardness (The amount of calcium and magnesium salts dissolved in water) |
hårdhetsgrad av vann |
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| water hyacinth (Floating aquatic plant, Eichornia crassipes of tropical America, having showy bluish-purple flowers and swollen leafstalks: family Pontederiaceae. It forms dense masses in rivers, ponds, etc., and is a serious pest in the southern U.S., Java, Australia, New Zealand, and parts of Africa) |
vannhyasint |
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| water infiltration into the ground (The movement of surface water into soil or rock through cracks and pores) |
vanninfiltrasjon i jorden |
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| water level (The level reached by the surface of a body of water) |
vannstand |
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| water management (Measures taken to ensure an adequate supply of water and a responsible utilization of water resources) |
vannforvaltning |
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| water mill (A mill whose power is provided by a large wheel which is turned by moving water, especially a river) |
vannmølle |
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| water monitoring (Studies conducted to estimate the quantity and the quality of pollutants, nutrients and suspended solids contained in water bodies and to assess sources and factors associated with agricultural practices, industrial activities or other human activities) |
vannovervåking |
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| water pollutant (A chemical or physical agent introduced to any body of water that may detrimentally alter the natural condition of that body of water and other associated bodies of water) |
vannforurensende stoff |
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| water pollution (The manmade or man-induced alteration of the chemical, physical, biological and radiological integrity of water) |
vannforurensning |
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| water pollution prevention (Precautionary measures, actions or installations implemented to avert or hinder human-made or human-induced alteration of the physical, biological, chemical and radiological integrity of water) |
vern mot vannforurensning |
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| water power (Energy obtained from natural or artificial waterfalls, either directly by turning a water wheel or turbine, or indirectly by generating electricity in a dynamo driven by a turbine) |
vannkraft |
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| water pricing (Applying a monetary rate or value at which water can be bought or sold) |
prissetting av vann |
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| water protection (Measures to conserve surface and groundwater; to ensure the continued availability of water for growing domestic, commercial and industrial uses and to ensure sufficient water for natural ecosystems) |
vern av vann |
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| water protection area (Area surrounding a water recovery plant in which certain forms of soil utilization are restricted or prohibited in order to protect the groundwater) |
vernet nedbørfelt |
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