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<br />6: 45 Dinner break followed by Jon Altenhofen who presents an overview of <br />the South Platte River System, its alluvial characteristics, and historical return <br />flow patters. <br /> <br />The South Platte River: How the system works, where the water comes from <br />and where it goes: <br />--physical features; key hydraulic components; <br />--central themes: tributary alluvial aquifer; how much of our system depends <br />on return flow <br />--before irrigation: South Platte was an intermittent stream; often dry during <br />year; Powell's comments or Delph Carpenter: this river flowed to Julesberg <br />during spring mnoff, then dry <br />--only after application of irrigation, development of alluvial aquifer <br />--river return flows beyond Kersey: large drops due to diversion; key: river <br />gains after diversion; because South Platte drains aquifer; about 5 cfs per mile; <br />in summer, from mouth ofPoudre west ofFt Collins, .river dries up five <br />times, but recovers because of alluvial <br />--water rights system developed upstream to downstream because of <br />development of deep percolation and aquifer; <br />--Reference to USGS water atlas as excellent resource <br />www.cap.water.lusgs.gov/gwa <br />--Groundwater: South Platte River forms natural drain...l million acre feet <br />seeps into river; fi-om Denver to state line <br /> <br />History of recharge: CSU publication: Recharge as augmentation in the South <br />Plate River Basin <br />www.ids.cdolostate <br /> <br />Hecox: March 21, American Groundwater Association has meeting; <br />Organizers are interested in roundtable meetings thus are offering a discount <br />of $80. Meeting will address use of groundwater resources in overall <br />thinking. <br /> <br />Rick Brown: Statewide Water Supply Initiative Presentation: CWCB <br />Overview of SWSI with a focus on South Platte Basin Supplies demands <br />See: www.cwcb.state.co.us <br />swsi@cdm.com <br />Major findings and resources: Handout and disks <br />--Projected increase in population <br />--Projected increase in water needs <br />--IP&P: identified projects and planning <br />South Platte over appropriated since l880s <br />Focus on proposing projects: per tasks... <br />How do you go about setting what the values of the basin will be; how to <br />come to consensus. <br /> <br />8 <br />