Circulation of water among various ecological systems, in various states, on, above, and below the surface of the earth.
Interactional process combining investigation, discussion, and agreement by a number of people in the preparation and carrying out of a program to ameliorate conditions of need or social pathology in the community. It usually involves the action of a formal political, legal, or recognized voluntary body.
Conservation of Natural Resources
The routing of water to open or closed areas where it is used for agricultural purposes.
A rating of a body of water based on measurable physical, chemical, and biological characteristics.
Water Pollutants, Chemical
The science, art or practice of cultivating soil, producing crops, and raising livestock.
Any significant change in measures of climate (such as temperature, precipitation, or wind) lasting for an extended period (decades or longer). It may result from natural factors such as changes in the sun's intensity, natural processes within the climate system such as changes in ocean circulation, or human activities.
The presence of bacteria, viruses, and fungi in water. This term is not restricted to pathogenic organisms.
Fluids composed mainly of water found within the body.
Any of several processes in which undesirable impurities in water are removed or neutralized; for example, chlorination, filtration, primary treatment, ion exchange, and distillation. It includes treatment of WASTE WATER to provide potable and hygienic water in a controlled or closed environment as well as provision of public drinking water supplies.
The withholding of water in a structured experimental situation.
Health Care Rationing
Planning for the equitable allocation, apportionment, or distribution of available health resources.
A class of porins that allow the passage of WATER and other small molecules across CELL MEMBRANES.
Information Storage and Retrieval
The salinated water of OCEANS AND SEAS that provides habitat for marine organisms.
Constructions built to access underground water.
A field of biology concerned with the development of techniques for the collection and manipulation of biological data, and the use of such data to make biological discoveries or predictions. This field encompasses all computational methods and theories for solving biological problems including manipulation of models and datasets.
The property of objects that determines the direction of heat flow when they are placed in direct thermal contact. The temperature is the energy of microscopic motions (vibrational and translational) of the particles of atoms.
Polyploidy with three sets of chromosomes. Triploidy in humans are 69XXX, 69XXY, and 69XYY. It is associated with HOLOPROSENCEPHALY; ABNORMALITIES, MULTIPLE; PARTIAL HYDATIDIFORM MOLE; and MISCARRAGES.
Science dealing with the properties, distribution, and circulation of water on and below the earth's surface, and atmosphere.
Multicellular marine macroalgae including some members of red (RHODOPHYTA), green (CHLOROPHYTA), and brown (PHAEOPHYTA) algae. They are widely distributed in the ocean, occurring from the tide level to considerable depths, free-floating (planktonic) or anchored to the substratum (benthic). They lack a specialized vascular system but take up fluids, nutrients, and gases directly from the water. They contain CHLOROPHYLL and are photosynthetic, but some also contain other light-absorbing pigments. Many are of economic importance as FOOD, fertilizer, AGAR, potash, or source of IODINE.