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<br />r <br /> <br />r <br /> <br />w <br />..~ <br />to <br /><.0 <br /> <br />~0272 -1m . <br />REPORT DOCUMENTATION I" REPORT NO. 2. 3. Recipient's Acc,sslon No. <br /> PAGE BLM/YA/TR-80/0l <br />4. Title and Subtitle Control of Salinity From Point Sources Yielding 5. Report Date <br /> Groundwater Discharge and From Diffuse Surface Februarv 1980 <br /> .. <br /> Runo ff in the Upper Colorado River Basin <br />7. Author(s) R. Gordon Bentley, Jr. , Keith O. Eggleston, and 8. Performing Ora:anlzatlon Rept. No. <br /> Eric B. Janes <br />9. Performing Organization Name and Address 10. Project/Task/Work Unit No. <br />USDI, Bureau of Land Management <br /> --"---- <br />Denver Service Center, Division of Special Studies 11. Contract(C) or Grant(G) No. <br />Bldg 50, Denver Federal Center (e) <br />Denver, Colorado 80225 <br /> (G) <br />12. Sponsorlns Orlanizatlon Name and Address 13. Type of Report & Period Covered <br />USDI, Bureau of Land Management <br />Denver Service Center, Division of Special Studies Oct. 1977 to Sept. 1979 <br />Bldg 50, Federal - <br />Denver Center 14. <br />Denver, Colorado 80225 <br /> . <br />15. Supplementary- Notes <br /> .- -- --~- -------- <br />16. Abstract (limit: 200 words) <br />The Bureau of Land Management has expanded its study of sources of salt yielded <br />from public lands to include salinity from groundwater discharge. The Bureau has <br />also continued to investigate the effects on salinity in surface runoff of grazing <br />of livestock and other uses of the land having a po"tential to cause soil disturbance. <br />Grazing by livestock can be an important means of controlling salinity in runoff, <br />when grazing follows a schedule designed to provide systematic rest for vegetation <br />and soils during critical periods. In some cases, removal of livestock or off-road <br />vehicles may be required. Progress is being made toward developing technically <br />feasible methods for controlling highly saline groundwater point discharges. Further <br />study is needed and could be accomplished through demonstration projects. The <br />cost-effectiveness of controlling saline groundwater is examined through several <br />case studies. <br /> .._~._~-- <br />17. Document Analysis 8. Descriptors <br />Salinity, Grazing, Runoff, Infiltration, Groundwater Discharge, Springs and Seeps, <br />Flowing Wells, Evaporation Ponds <br />b. Identifiers/Open-Ended Terms <br />Grazing Management Systems, Erosion and Salinity Control, Range Condit ion, <br />Technical Feasibility and Cost-Effectiveness Analysis <br />c. COSATI Field/Group <br />1----.----.----.. ._"~------------'""~._- <br />18. Availability statement 19. Security Class (This Report) 21. No. of Pages <br /> Unclassified ___31 <br />Release Unlimited ---- --------_.__.~--------- ------ <br /> 20. Security Class (This Page) 22. Price <br /> Unclassified <br /> <br />(See ANSr-Z39.18) <br /> <br />See Instructions on Reverse <br /> <br />OPTIONAL fORM 272 (4-77) <br />(Formerly NTIS-35) <br />Department of Commerce <br /> <br />! <br />