Active Storage CapacityIn hydrologic terms, the total amount of reservoir capacity normally available for release from a reservoir below the maximum storage level. It is total or reservoir capacity minus inactive storage capacity. More specifically, it is the volume of water between the outlet works and the spillway crest. Area-Capacity CurveIn hydrologic terms, a graph showing the relation between the surface area of the water in a reservoir, the corresponding volume, and elevation. Exclusive Flood Control Storage CapacityIn hydrologic terms, the space in a reservoir reserved for the sole purpose of regulating flood inflows to abate flood damageField (Moisture) CapacityThe amount of water held in soil against the pull of gravityInactive Storage CapacityIn hydrologic terms, the portion of capacity below which the reservoir is not normally drawn, and which is provided for
sedimentation, recreation, fish and wildlife, aesthetic reasons, or for the creation of a minimum controlled operational or power head in
compliance with operating agreements or restrictions.Infiltration CapacityIn hydrologic terms, the maximum rate at which water can enter the soil at a particular point under a given set of conditions.Live CapacityIn hydrologic terms, the total amount of storage capacity available in a reservoir for all purposes, from the dead storage level to the normal water or
normal pool level surface level. Does not include surcharge, or dead storage, but does include inactive storage, active conservation
storage and exclusive flood control storage.North Pacific HighA semi-permanent, subtropical area of high pressure in the North Pacific Ocean. It is strongest in the Northern Hemispheric summer and is displaced towards the equator during the winter when the Aleutian Low becomes more dominate. Comparable systems are the Azores High and the Bermuda High.PACPacificPacific Decadal Oscillation(Abbrev. PDO) - a recently described pattern of climate variation similar to ENSO though on a timescale of decades and not seasons. It is characterized by SST anomalies of one sign in the north-central Pacific and SST anomalies of another sign to the north and east near the Aleutians and the Gulf of Alaska. It primarily affects weather patterns and sea surface temperatures in the Pacific Northwest, Alaska, and northern Pacific Islands.Sediment Storage CapacityIn hydrologic terms, the volume of a reservoir planned for the deposition of sediment.Snow PackSame as Snowcover; the combined layers of snow and ice on the ground at any one time.SnowpackThe total snow and ice on the ground, including both the new snow and the previous snow and ice which has not melted.Space Environment Center(SEC) - This center provides real-time monitoring and forecasting of solar and geophysical events, conducts research in solar-terrestrial physics, and develops techniques for forecasting solar and geophysical disturbances. SEC's parent organization is the National Oceanic and Atmospheric Administration (NOAA). SEC is one of NOAA's 12 Environmental Research Laboratories (ERL) and one of NOAA's 9 National Centers for Environmental Prediction (NCEP). SEC's Space Weather Operations is jointly operated by NOAA and the U.S. Air Force and is the national and world warning center for disturbances that can affect people and equipment working in the space environment.Surcharge CapacityIn hydrologic terms, the volume of a reservoir between the maximum water surface elevation for which the dam is designed and the crest of an
uncontrolled spillway, or the normal full-pool elevation of the reservoir with the crest gates in the normal closed position.Variable Infiltration Capacity (VIC)A large-scale, semi-distributed hydrologic model that solves full water and energy balances. As such, it shares several basic features with other land surface models that are commonly coupled to global circulation models.
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