antecedent moisture

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• Antecedent moisture — is a term from the fields of Hydrology and sewage collection and disposal that describes the relative wetness or dryness of a watershed or sanitary sewershed. Antecedent moisture conditions change continuously and can have a very significant… …   Wikipedia

• Antecedent — An antecedent is a preceding event, condition, cause, phrase, or word. *Antecedent moisture is a hydrologic term describing the relative wetness condition of a sewershed. *In logic, an antecedent is the first half of a hypothetical proposition.… …   Wikipedia

• Antecedent soil moisture — is a term used in surface water hydrology in reference to runoff prediction and in process geomorphology in reference to fluvial patterns in drainage basins. Soil retains a degree of moisture after a rainfall event. This residual water moisture… …   Wikipedia

• antecedent-soil moisture —    The degree of water saturation in the soil prior to a precipitation event [16] …   Lexicon of Cave and Karst Terminology

• Runoff curve number — The runoff curve number (also called a curve number or simply CN) is an empirical parameter used in hydrology for predicting direct runoff or infiltration from rainfall excess.[1] The curve number method was developed by the USDA Natural… …   Wikipedia

• Hydrology — Water covers 70% of the Earth s surface. Hydrology is the study of the movement, distribution, and quality of water on Earth and other planets, including the hydrologic cycle, water resources and environmental watershed sustainability. A… …   Wikipedia

• Sewage collection and disposal — Urban areas require some methods for collection and disposal of sewage.CollectionA sewage system may convey the wastewater by gravity to a sewage treatment plant. Where pipeline excavation is difficult because of rock or there is limited… …   Wikipedia

• Hydrological transport model — An hydrological transport model is a mathematical model used to simulate river or stream flow and calculate water quality parameters. These models generally came into use in the 1960s and 1970s when demand for numerical forecasting of water… …   Wikipedia

• river — river1 riverless, adj. riverlike, adj. /riv euhr/, n. 1. a natural stream of water of fairly large size flowing in a definite course or channel or series of diverging and converging channels. 2. a similar stream of something other than water: a… …   Universalium

• Surface runoff — Runoff flowing into a stormwater drain Surface runoff is the water flow that occurs when soil is infiltrated to full capacity and excess water from rain, meltwater, or other sources flows over the land. This is a major component of the water… …   Wikipedia

• Blizzard of 1977 — Snow drifts made travel difficult in parts of New York (February 7, 1977), shown is the city of Buffalo …   Wikipedia