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<br />-------......................................................................--.... <br /> <br />Artificial Recharge of Ground Water in Colorado <br />A Statewide Assessment <br /> <br />Table IV-I. Comparisons of Artificial Recharge Technologies (Cont'd) <br /> <br /> Active <br /> Technology Description Cotorado Advantages Limitations Aquifer Suitability <br /> Examples <br />Subsurface Infiltration . Can be used where . Higher initial capital . Unconfined aquifers <br />(General comments apply surface layers of low costs . Alluvium <br />to all technologies within penneability preclude . Limited aerial extent . Semi-consolidated <br />this category) surface infiltration . Difficult to sediments at outcrop <br /> . Can co-exist with other cleanJrnaintain . Highly fractured bedrock <br /> surface urban uses such as . Dependent upon near- <br /> parking lots and surface geology <br /> recreation facilities <br /> . Minimize evaporation <br /> losses <br />:- Infiltration Trenches Perforated pipe embedded None . Compatible with urban <br /> in a gravel-filled ditch land uses <br />? Infiltration Galleries Similar to trenches except None . Can cover larger areas <br /> III arrays <br />:- Dry Wells Wells completed above None . Can be used where space <br /> the water table is limited <br />> Infiltration Pits/Shafts Large diameter bore or None <br /> excavation to penetrate <br /> near -surface low <br /> penneabilitv soils <br /> <br />25 <br />