Definitions for "Dissolved Oxygen"
Related Terms:
Biological oxygen demand, Chemical oxygen demand, Biochemical oxygen demand, Anoxic, Bod, Cod, Total dissolved solids, Deoxygenation, Saline water, Bioventing, Tds, Nitrites, Nitrate, Purified water, Nitrates, Fresh water, Water quality, Orp, Eutrophication, Distilled water, Osmoregulation, Oxygen bleaching, Bod5, Water, Reverse osmosis, Salinity, Leach, Carbon filtration, Dissolved solids, Desalination, Total suspended solids, Leaching, Anaerobic bacteria, Anaërobic, Freshwater, Reaeration, Conventional pollutants, Denitrification, Total solids, Aerobic bacteria, Hydrophilic, Nitrogen cycle, Nitrite, Nitrification, Activated carbon, Hydrophobic, Water, Water activity, Water solubility, Concentration
Oxygen is essential for all forms of aquatic life and many organisms obtain this oxygen directly from the water in the dissolved form. The level of dissolved oxygen in natural waters varies with temperature, turbulence, photosynthetic activity and atmospheric pressure. Dissolved oxygen varies over 24 hour periods as well as seasonally and can range from as high as 15 mg/L to levels approaching 0 mg/L. Levels below 5 mg/L will begin to place stress on aquatic biota and below 2 mg/L will cause death of fish.
Gaseous form of oxygen in solution with water, abbreviated as DO and measured as mg/L (milligrams per liter) or ppm (parts per million).
the amount of free oxygen dissolved in water. DO is required by organisms for respiration in water. DO levels in estuaries fluctuate widely from both natural and manmade influences.
oxygen dissolved in water and available for living organisms to use for respiration
Shows the presence of Oxygen in water. Oxygen in water is a positive sign, and allows organisms to live. Some like trout need high levels to survive.
molecular oxygen that is in solution in a liquid
DO. The amount of oxygen dissolved in a solvent (usually water). Dissolved oxygen levels are used as a general indicator of water quality.
The amount of oxygen freely available in water and necessary for aquatic life and the oxidation of organic materials.
pH trout
a measure of the amount of oxygen available for biochemical activity in a body of water. The amount of dissolved oxygen can serve as an indicator for water quality.
Oxygen gas molecules (02) dissolved in water. Fish and other aquatic organisms depend on dissolved oxygen for respiration. Therefore, concentration of dissolved oxygen is a measure of water quality.
the amount of oxygen measured in the water.
Biological decomposition of organic matter uses dissolved oxygen. Since fish and most aquatic life are stifled by lack of oxygen, dissolved oxygen determination is a principal measurement in pollution surveys. The DO analysis is part of the BOD test procedure.
the amount of oxygen that is dissolved in a solution. Dissolved Oxygen (D.O.) can cause armoring on limestone by oxidizing iron compounds in AMD to form iron hydroxide. D.O. is usually measured in parts per million (milligrams per liter).
Oxygen (from the atmosphere or from a bi-product of metabolic processes) dissolved in the water and available for animal and plant uptake
Oxygen found in dissolved form in water.
oxygen dissolved in water and available to aquatic organisms. Concentrations below 5 mg/l are stressful and may be lethal to many fish and other species.
Microscopic bubbles of oxygen that are mixed in the water and occur between water molecules. Dissolved oxygen is necessary for healthy lakes, rivers, and estuaries. Most aquatic plants and animals need oxygen to survive. Fish will drown in water when the dissolved oxygen levels get too low. The absence of dissolved oxygen in water is a sign of possible pollution.
Oxygen that is dissolved in the water. Certain amounts are necessary for life processes of aquatic animals. The oxygen is supplied by the photosynthesis of plants, including algae, and by aeration. Oxygen is consumed by animals and plants at night, and bacterial decomposition of dead organic matter (plant matter and animal waste).
DO is the concentration of oxygen dissolved in water, measured in milligrams per liter (mg/L).
Oxygen dissolved in water and therefore freely available to aquatic organisms
oxygen molecules (O2) dissolved in water.
The concentration of oxygen dissolved in Bay waters; this is often measured in units of milligrams per liter, or as percent saturation (the measured concentration divided by the concentration that would occur if dissolved oxgyen was determined only by exchanges with the atmosphere -- i.e., in the absence of biological processes of oxygen consumption and production)
the oxygen gas carried in solution by the seawater and required for respiration (breathing) by marine organisms
oxygen that is dissolved in water and which is respired by aquatic organisms.
The amount of oxygen, O2, in solution under existing atmospheric pressure and temperature.
A measure of oxygen contained in the water. Adequate dissolved oxygen is critical to most aquatic organisms and is one of the more important indicators of environmental health.
Oxygen found in water and required by organisms for survival. As the amount of sewage increases in water, bacteria multiply to feed on the sewage and consume more oxygen, thereby decreasing the amount in the water available for use by other animals living there.
The amount of oxygen available to fish and other aquatic organisms. Fish begin to show negative effects when DO falls below 2 milligrams per liter (mg/l) for an extended time. Aquatic plants and algae are important contributors of dissolved oxygen.
The amount of oxygen in solution (in a water body)
The oxygen, vital to fish and other aquatic life, freely available in water. Traditionally, the level of dissolved oxygen has been accepted as the single most important indicator of a water body's ability to support beneficial aquatic life.
The amount of free (not chemically combined) oxygen in water. Usually expressed in milligrams per liter.
The amount of oxygen in the water, measured in parts per million, or ppm. Although most fish can survive low dissolved oxygen for short periods of time, most fish need at least 5 ppm to be healthy and grow.
The amount of oxygen present in the water column. More than 5 parts oxygen per million parts water is considered healthy; below 3 parts oxygen per million is generally stressful to aquatic organisms.
Perhaps the most commonly employed measure of water quality. Low DO levels adversely affect fish and other aquatic life. The total absence of DO leads to the development of an anaerobic condition with the eventual development of odor and aesthetic problems.
Oxygen in water that is produced by aquatic plants and is mixed from the air. Used by fish and other organisms to live, dissolved oxygen (DO) is measured either as a weight concentration per volume of water (milligrams per liter) or as parts per million (ppm). Ice and snow cover blocks sunlight and air contact with waterbodies during many Eagan winters, lowering DO in shallow lakes and ponds. When DO concentrations fall below 5 ppm, sensitive aquatic organisms are at an increased risk of mortality.
a gaseous state of oxygen found in water
The oxygen dissolved in water that is necessary to sustain aquatic life. It is usually measured in milligrams per liter (mg/L) or parts per million (ppm).
(DO)- free oxygen (O2) held in solution in water and needed as source of oxygen by fish and other aquatic vertebrates; measured in mg/L, with less than 5 mg/L being cause for water pollution alert.
The amount of free oxygen available in water or other liquid solution for use by bacteria. Measured in ppm (parts per million) or mg/l (milligrams per liter).
Microscopic bubbles of oxygen that are mixed in water. Dissolved oxygen is necessary for healthy lakes, rivers, and estuaries. Fish will drown in water if the dissolved oxygen levels get too low (hypoxia - see below).
The molecular oxygen dissolved in water, wastewater, or other liquid; generally expressed in milligrams per liter, parts per million, or percent of saturation.
Oxygen that is available in water.
The amount of oxygen dissolved in water. This term also refers to a measure of the amount of oxygen available for biochemical activity in a waterbody, an indicator of the quality of that water.
The oxygen dissolved inwater, wastewater, or other liquid, usually expressedin milligrams per liter (mg/L), parts per million(ppm), or percent of saturation.
The oxygen dissolved in water, wastewater, or other liquid. DO is measured in milligrams per liter. If the DO of a sample of water is 2 mg/L, it means that there are 2lbs of oxygen in 1 mil lb of water.
Oxygen released into the water by photosynthesis and by air-water interactions; it is essential for respiration of aquatic animals.
The concentration of oxygen (normally aged gas) dissolved in water. It is a function of temperature and pressure. The colder the water, the more oxygen it will hold. In general, fish require 5.0 mg/l in a stream.
The amount of oxygen that is dissolved in water.
A measure of the amount of oxygen available for biochemical activity in a given amount of water. Low DO levels are generally due to inadequate waste treatment.
oxygen dissolved in water which is readily available to plants and animals.
The amount of oxygen gas (O2) dissolved in a given volume of water at a particular temperature and pressure. Usually expressed in concentrations in parts per million (ppm) or milligrams per liter (mg/L).
A measure of the amount of oxygen gas dissolved in water and available for use by microorganisms and fish.
Oxygen dissolved in water and readily available to fish and other aquatic organisms.
The amount of free oxygen dissolved in water and readily available to aquatic organisms.
(DO) - The amount of oxygen dissolved in water. Measured in mg/L or ppm. Low DO can be harmful to aquatic organisms. See state standards for rules on this.
the volume of oxygen dissolved in water.
The oxygen in water that is available to support aquatic life.
State of oxygen that is available to fish and other aquatic life. Produced by aquatic vascular plants and algae.
The concentration of oxygen dissolved in water. Usually expressed in milligrams per liter or parts per million.
the amount of oxygen dissolved in water; varies with water temperature and pressure; measured in milligrams of oxygen per liter of water, parts per million, or percent saturation.
Oxygen gas molecules dissolved in water that are available for living organisms to use. Abbreviated DO. Measured in parts per million (ppm). DO solubility varies with water temperature and pressure.
the amount of oxygen contained in water, reflecting an equilibrium between oxygen-producing processes ( e.g. photosynthesis) and oxygen-consuming processes ( e.g. aerobic respiration) and the rates at which DO is added to and removed from the system by atmospheric exchange and hydrodynamic processes
DO, The amount of oxygen dissolved in water; introduced through aeration, photosynthesis from plants, or as part of a treatment process to remove certain contaminants.
pure oxygen found in a body of water that may safely be used by marine organisms; the concentration of dissolved oxygen is largely determined by water temperature, salinity level and the amount of oxygen-consuming pollutants in the water
this term refers to the quantity of oxygen in the water. In surface water, levels of more than 10 mg/l (oversaturation) signal an excessive development of microalgae. Average values should be between 6-8 mg/l but are subject to variation and in deep water, values of less than 3 mg/l are normal.
in the aquatic environment , the life supporting gas – oxygen – is present dissolved in solution with the water and must be extracted from the water by living organisms using specialized respiratory structures, such as gills. If the level of dissolved oxygen drops too low, then respiratory distress leading to death may occur.
Oxygen in the water (which may be used by aquatic animals).
Aquatic life depends on oxygen to breathe, as does all life. But for oxygen to be available in water, it must be dissolved first. Oxygen becomes dissolved in water when tiny air bubbles are trapped by churning river rapids or waterfalls and also as a byproduct of photosynthesis by aquatic plants. Those rivers that have excess amounts of nutrients can become low in dissolved oxygen from overuse by microorganisms.
A water quality parameter describing the amount of oxygen present.
the amount of free oxygen absorbed by the water and available to aquatic organisms for respiration; amount of oxygen dissolved in a certain amount of water at a particular temperature and pressure, often expressed as a concentration in parts of oxygen per million parts of water.
the amount of oxygen dissolved in water. The amount is usually expressed in parts per million (ppm) or milligrams per liter (mg/L).
Liuonnut happi Upplöst syre Amount of gaseous oxygen (O2) actually present in water expressed in terms either of its presence in the volume of water (milligrams of O2 per litre) or of its share in saturated water (percentage).
oxygen dissolved in water; it is essential for plant and animal growth
(DO): the oxygen dissolved in sewage, water, or other liquid, usually expressed in milligrams per liter or percent of saturation. It is the test used in BOD determination.
(DO)--Amount of oxygen gas dissolved in a given quantity of water at a given temperature and atmospheric pressure. It is usually expressed as a concentration in parts per million or as a percentage of saturation.
The oxygen freely available in water, vital to fish and other aquatic life and for the prevention of odors. DO levels are considered a most important indicator of a water body's ability to support desirable aquatic life. Secondary and advanced waste treatment are generally designed to ensure adequate DO in waste-receiving waters. Entropy: a thermodynamic state or property that measures the degree of disorder or randomness of a system .
Measure of water quality indicating free oxygen dissolved in water.
refers to oxygen from the air dissolved in water.
A component of water that is essential to the survival of aquatic life. Low concentrations of dissolved oxygen are generally caused by oxygen use during the decomposition of organic matter.
concentration of oxygen in the water; produced by plants during photosynthesis and necessary for animal respiration; levels consistently below 3 to 5 milligrams per liter (mg/L) stress the survival of fish and many marine organisms.
The oxygen freely available in water, vital to fish and other aquatic life and necessary for the prevention of odors in water. DO levels are a critical indicator of a waterbody’s ability to support desirable aquatic life. Secondary and advanced wastewater treatments are generally designed to ensure adequate DO in waste-receiving waters by removing, digesting, or oxidizing oxygen-demanding wastes (see biological oxygen demand).