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In geology, degradation refers to the lowering of a fluvial surface, such as a stream bed or floodplain, through erosional processes. [ 1 ] [ 2 ] Degradation is the opposite of aggradation . Degradation is characteristic of channel networks in which either bedrock erosion is taking place, or in systems that are sediment -starved and are ...
This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...
sewage- water and raw effluent disposed through toilets, kitchens and bathrooms. Includes water-borne wastes from domestic uses of water from households, or similar uses in trade or industry. sewer - a pipe conveying sewage. sewerage - a system of pipes and mechanical appliances for the collection and transportation of domestic and industrial ...
Water moves perpetually through each of these regions in the water cycle consisting of the following transfer processes: evaporation from oceans and other water bodies into the air and transpiration from land plants and animals into the air. precipitation, from water vapor condensing from the air and falling to the earth or ocean.
Types of nonpoint source water pollution include sediment, nutrients, toxic contaminants and chemicals and pathogens. Principal sources of nonpoint source water pollution include: urban and suburban areas, agricultural operations, atmospheric inputs, highway runoff, forestry and mining operations, marinas and boating activities.
One can differentiate abiotic decomposition from biotic decomposition (biodegradation); the former means "the degradation of a substance by chemical or physical processes", e.g., hydrolysis; the latter means "the metabolic breakdown of materials into simpler components by living organisms", typically by microorganisms.
Water management is the process of planning, developing, and managing water resources across all water applications, in terms of both quantity and quality." Water management is supported and guided by institutions, infrastructure, incentives, and information systems
An aquatic ecosystem is an ecosystem found in and around a body of water, in contrast to land-based terrestrial ecosystems.Aquatic ecosystems contain communities of organisms—aquatic life—that are dependent on each other and on their environment.