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Headwater : The point of origin of a river. Mouth : The term used to describe the end point of a river where it empties into a lake or ocean. Delta : The formation that results at the mouth of a rier where sediments carried by the river have been deposited. Slope : An inclined surface that is at a particular angle to a horizon. Watershed :The total land area that is drained by a particular river system also known as a drainage basin. Drainage Basin: The total land area that contributes water to a river sytem, pond, or lake; also known as a watershed. Velocity : Meandering : The reoccuring S-Shape in a river system. Erosdion : The movement of rock particles or soil by wind, water, and the force of gravity. Cutbanks : A specific physical feature of a flowing body of water caused by the eroision of material away from the outside curve of a meander, resulting in a steep drop off. Riffle : The particular point in a flowing body of water that is relativley straight and shallow, where sediments are deposited, forming turbulent water. Point bar : The point in a stream or river, located on the inside curve of a meander, where sediments are deposited. // Aquifer // : Large amounts of water stroed in porous or fragmented rock underground. // groundwater // : Naturally occuring freshwater that flows or is stored underground in rock or sediments. // Porosity // : // Permeability // : // Spring // : // Runoff // : The rapid loss of soils, sediments, or other substances as a result of being wasted away by rain or melting snow. // Unconfined aquifer // : // Confined Aquifer // : Groundwater that is located below the impermeabel rock layer. // Water Table // : The uppermost level of the soil where the pore spaces are completley saturated by ground water. // Zone of Saturation // : The area of soil where all the pores in the soil are filled with water. // Zone of Aeration // : The area of the soil where all the pores are not filled with water.
 * Vocabulary Words**