Agenda - Council - 07/28/2015 - Laserfiche WebLink

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Baseflow The amount of water in a stream, lake or wetland that is supplied by groundwater. This is also referred to as dry weather flow. Basin Minnesota Administrative Rules 6115.0630 defines a basin as a depression capable of containing water which may be filled or partly filled with waters of the state. It may be a natural, altered, or artificial depression. Benchmark A measurable water resource condition against which historic, current, and projected conditions can be compared to evaluate the sustainability of the region's water supplies. Beneficial Use Use of a [water] resource that includes, but is not limited to, domestic (including public water supply), agricultural, commercial, industrial, water- based recreational uses and the propagation and growth of aquatic life. Best Management Practices A set of recommendations pertaining to the development and maintenance of varied land uses, aimed at limiting the effects of development, such as soil erosion and stormwater runoff, on the natural environment. See the Council's Urban Small Sites Best Management Practices Manual for specific examples of Best Management Practices. Calibration The process of using historical data to estimate parameters in a groundwater model, hydrologic forecast technique, routings, and unit hydrographs. Capita Latin for `person'. Community Public Water Supply Community public water supplies serve at least 25 persons or 15 services connections year-round, which includes municipalities, manufactured mobile home parks, etc. These systems are required to provide a safe and adequate supply of water under the federal Safe Drinking Water Act. Also known as a public water supply system. Cone of Depression A cone-shaped depression of the water table. Confined Aquifer An aquifer with a confining layer at the top, causing the groundwater to be under pressure. Minnesota Administrative Rules 6115.0630 defines artesian aquifer or a confined aquifer as a water body or aquifer overlain by a layer of material of less permeability than the aquifer. The water is under sufficient pressure so that when it is penetrated by a well, the water will rise above the top of the aquifer. A flowing artesian condition exists when the water flow is at or above the land surface. Confining Unit A hydrogeologic unit of impermeable or distinctly less permeable material bounding one or more aquifers and is a general term that replaces aquitard. Conjunctive Use The coordinated management of surface water and groundwater supplies to maximize the yield of the overall water resource. An active form of conjuctive use utilizes artificial recharge, where surface water is intentionally percolated or injected into aquifers for later use. A passive method is to simply rely on surface water in wet years and use groundwater in dry years. WATER SUPPLY MASTER COMMUNITY HIGHLIGHTS PLAN- Draft June 2015