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