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Artificial Recharge of Ground Water in Colorado <br />A Statewide Assessment <br />Table IV -1. Comparisons of Artificial Recharge Technologies <br />24 <br />Active <br />Aquifer <br />Technology <br />Description <br />Colorado <br />Advantages <br />Limitations <br />Suitability <br />Examples <br />Surface Infiltration <br />Initial low capital cost <br />• Require near - surface aquifer <br />• Unconfined <br />(General comments apply <br />Maintenance can be <br />0 Require permeable soil <br />aquifers with <br />to all technologies within <br />simple and low cost <br />profile/high vertical <br />surface exposure <br />this category) <br />Low O &M costs <br />permeability <br />• Alluvium <br />• Can use untreated <br />Require frequent maintenance <br />• Semi - <br />surface water <br />to prevent clogging <br />consolidated <br />• Can co -exist with <br />0 Evaporation losses can be high <br />sediments at <br />recreation use or wildlife <br />• Vulnerable to surface <br />outcrop <br />habitat <br />contamination <br />• Highly fractured <br />• May be incompatible with <br />bedrock <br />nearby land uses <br />➢ Infiltration Ponds and <br />Engineered off - channel <br />San Luis Valley <br />. Can adapt former gravel <br />• Can require large tracts of land <br />Basins, <br />structures (rectilinear) <br />pits /quarries <br />➢ Spreading Basins <br />➢ Leaky Ponds and <br />Allow existing structure to <br />Olds Reservoir <br />0 Take advantage of <br />• Very site specific <br />Reservoirs <br />leak <br />existing structure <br />➢ Infiltration Ditches <br />Engineered off - channel <br />None <br />• Adapt to irregular <br />• Very site specific <br />➢ Ditch/Furrow <br />structures (linear) <br />topography <br />➢ Leaky Ditches <br />Allow existing structure to <br />South Platte <br />0 Take advantage of <br />• Very site specific <br />leak <br />River Basin <br />existing structure <br />➢ Dry Stream Channels <br />Divert flow into the natural <br />Bijou Creek <br />• Take advantage of <br />0 Very site specific <br />channel of an ephemeral <br />natural topographic <br />0 Environmental concerns <br />stream <br />feature <br />➢ Playa Lakes <br />Use natural depressions that <br />Akron playa <br />0 Take advantage of <br />• Very site specific <br />catch water in wet cycles <br />experiment <br />natural topographic <br />• Require soil modification to <br />feature <br />break -up /remove native low <br />permeability soils. <br />➢ Land Application <br />Surface irrigation at rates <br />None <br />• Combine with <br />• Require large tracts of land <br />that exceed crop <br />agricultural or <br />consumptive use <br />recreational land use <br />• Generate revenue from <br />crops or recreational fees <br />24 <br />