Surface Coal Mining Effects on Ground Water Recharge (1990) / Chapter Skim
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Appendix A: Glossary
Appendix A: Glossary
Pages 113-117
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From page 113... ...
Aquicludes often form confining layers for aquifers. aquifer A sufficiently permeable formation storing, transmitting, and yielding ground water in useable quantities.
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From page 114... ...
ground water Subsurface water under a pressure greater than atmospheric. hysteretic function The difference between water content and water pressure relations in unsaturated porous media due to antecedent conditions, i.e., wetting or drying.
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From page 115... ...
loess A sediment, commonly nonstratified and commonly unconsolidated, composed dominantly of silt-size particles, ordinarily with accessory clay and sand, deposited primarily by the wind. perched aquifer A localized unconfined aquifer formed above a relatively impermeable layer.
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From page 116... ...
sodic (soils A nonsaline soil containing sufficient exchangeable sodium to adversely affect crop production and soil structure under most soil and plant type conditions. solution channels Channels formed within soluble rocks (such as limestones by the action of water and chemicals in dissolving rock material.
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From page 117... ...
It includes the capillary fringe. water table The surface defining the location where the pressure potential is atmospheric for an unconfined aquifer.
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