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2. Well drainage - Wikipedia

   en.wikipedia.org/wiki/Well_drainage

   Geometry of a fully penetrating well drainage system in a uniform, isotropic aquifer Geometry of a partially penetrating well drainage system in an anisotropic layered aquifer The basic, steady state , equation for flow to fully penetrating wells (i.e. wells reaching the impermeable base) in a regularly spaced well field in a uniform unconfined ...

3. Drill cuttings - Wikipedia

   en.wikipedia.org/wiki/Drill_cuttings

   Estimated treatment costs, which include transportation, spreading, amendments, and monitoring, are about $4–5 per cubic yard. When the treated material is recycled as backfill, net costs are about $1 per cubic yard. Capital costs (not included in the treatment cost estimates) were recovered within the first eight months of operation (Cole ...

4. Dry well - Wikipedia

   en.wikipedia.org/wiki/Dry_well

   A dry well or drywell is an underground structure that disposes of unwanted water, most commonly surface runoff and stormwater, in some cases greywater or water used in a groundwater heat pump. It is a gravity-fed , vertical underground system that can capture surface water from impervious surfaces , then store and gradually infiltrate the ...

5. Drainage equation - Wikipedia

   en.wikipedia.org/wiki/Drainage_equation

   A drainage equation is an equation describing the relation between depth and spacing of parallel subsurface drains, depth of the watertable, depth and hydraulic conductivity of the soils. It is used in drainage design.

6. Groundwater recharge - Wikipedia

   en.wikipedia.org/wiki/Groundwater_recharge

   Groundwater recharge or deep drainage or deep percolation is a hydrologic process, where water moves downward from surface water to groundwater. Recharge is the primary method through which water enters an aquifer. This process usually occurs in the vadose zone below plant roots and is often expressed as a flux to the water table surface.

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