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Riparian Vegetation Vegetation growing on the banks of a stream or other body of surface water. (Rice (1991)) River Basin The area drained by a river and its tributaries. (Rice (1991)) RTi -Riverside Technology, inc. Riverside Technology, inc. Prime contractor for the CRDSS. River Stage The elevation of the water surface at a specified station above some arbitrary zero datum. (Rice (1991)) Running Average A running average is calculated by averaging N neighboring data values at each point in a time series. N is obtained by taking a user defined bracket multiplying by two and then adding one. This insures that there are always an odd number of values to average which, in turn insures that the date in the new time series aligns with an even interval of the old time series. A running average curve is usually calculated for a time series that is noisy (i.e. many fluctuations). Missing data influences the running average by reducing the number of values averaged at a point in the graph. Runoff Precipitation that flows to and in surface streams; renewable water. (Rice (1991)) Salinity The amount of dissolved solids in water, sometimes referred to as Total Dissolved Solids (TDS), as well as Soluble Mineral Content (SMC). 500 ppm is acceptable for drinking water; plan damage occurs at 800-1000 ppm. (Rice (1991)) Salvaged Water Water which is saved to a natural stream by human modification of natural conditions. (Rice (1991)) SCCS -Source Code Control System A revision control system for programs. Source code and revisions are stored in a single file. Revisions are assigned a "delta" and any delta can be retrieved from the file. SCS Soil Conservation Service Seepage Water 1. The slow movement of water through small cracks, pores, interstices of a material into or out of a body of surface or subsurface water. 2. The loss of water by infiltration into the soil from a canal, reservoir, or other body of water, or from a field. Seepage is generally expressed as flow volume per unit time. During the process of priming, the loss is called absorption loss. (Rice (1991)) SGI Silicon Graphics, Inc. Simulation Modeling of actual conditions, with the goal of reproducing natural events as closely as possible. Simulation models must first be calibrated against historical data. Site Maps Site maps have geographical links displayed as icons on corresponding map coordinates to features. When these are selected graphs or spreadsheets can be displayed. Solar Radiation The total electromagnetic radiation emitted by the sun (see insolation). (Rice (1991)) Spatial Data Data that are inherently tied to a coordinate system and which are not suited for storage in a relational database (e.g., basin boundary coordinates). Some data are suitable for both. For example, gaging stations are generally located with a latitude and longitude. However, although these are spatial data, the data could also be stored in a relational database with other station parameters.