The Science of Instream Flows A Review of the Texas Instream Flow Program (2005) / Chapter Skim
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Appendix A Glossary
Appendix A Glossary
Pages 137-142
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From page 137... ...
Appropriation -- A specified amount of water set aside by Congress, other legislative body or state or provincial water regulatory authority to be used for a specified purpose at a specified place, if available. Aquatic life -- All organisms living in or on the water.
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From page 138... ...
May also apply to longitudinal succession of biological communities. Groundwater -- In general, all subsurface water that is distinct from surface water; specifically, that part which is in the saturated zone of a de fined aquifer.
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From page 139... ...
; and ecosystem main tenance, which includes recruitment of fresh water to the estuaries, riparian vegetation, floodplain wetlands, and maintenance of chan nel geomorphology. Instream flow requirements are typically rec ognized and administered under the authority of some type of legal means such as a water right, permit or operating agreement.
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From page 140... ...
Open channel hydraulics -- The analysis of water flow and associated ma terials in an open channel with a free water surface, as opposed to a tunnel or pipeline. Overbank flow -- An infrequent, high flow event that overtops the river banks, physically shapes the channel and floodplain, recharges ground water tables, delivers nutrients to riparian vegetation, and
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From page 141... ...
Streambed -- The bottom of the stream channel; may be wet or dry. Subsistence flow -- The minimum streamflow needed during critical drought periods to maintain tolerable water quality conditions and provide minimal aquatic habitat space for the survival of aquatic organisms.
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From page 142... ...
These events may be dis charge, habitat areas, stream temperature, population factors, eco nomic indicators, power generation, and so forth. Tributary -- A stream feeding, joining, or flowing into a larger stream (at any point along its course or into a lake)
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Key Terms
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