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<br />Page <br /> <br /> <br />002457 <br /> <br />CONTENTS <br /> <br />Abstract---------------------------------------------------------------- <br />Introduction------------------------------------------------------------ <br />The model--------------------------------------------------------------- <br />Available data---------------------------------------------------------- <br />Data estimation--------------------------------------------------------- <br />Surface water------------------------------------------------------ <br />Water quality------------------------------------------------------ <br />Model calibration------------------------------------------------------- <br />Analysis of anticipated mining activity--------------------------------- <br />Calculation for Dry Creek------------------------------------------ <br />Discharge----------------------------------------------------- <br />Dissolved-solids concentration-------------------------------- <br />Existing conditions-------------------------------------~----- <br />Anticipated mining-------------------------------------------- <br />Summary----------------------------------------------------------------- <br />References-------------------------------------------------------------- <br /> <br />Page <br />1 <br />1 <br />3 <br />8 <br />10 <br />10 <br />12 <br />15 <br />29 <br />44 <br />44 <br />58 <br />58 <br />59 <br />63 <br />66 <br /> <br />ILLUSTRATIONS <br /> <br />Figure 1. Location map showing the model node system, streamflow-gaging <br />stations, and miscellaneous measuring sites---------------- 4 <br />2. Diagram of a simple stream network with nodes and node <br />numbers for the model-------------------------------------- 5 <br />3-5. Graphs showing a comparison at node 15, Middle Creek at <br />mouth, of calibrated model output and observed: <br />3. Mean monthly discharge------------------------------ 16 <br />4. Mean monthly dissolved-solids concentration--------- 17 <br />5. Total monthly load---------------------------------- 18 <br />6-8. Graphs showing a comparison at node 19, Fish Creek at mouth, <br />near llilner, of calibrated model output and observed: <br />6. Mean monthly discharge------------------------------ 19 <br />7. Mean monthly dissolved-solids concentration--------- 20 <br />8. Total monthly load---------------------------------- 21 <br />9-11. Graphs showing a comparison at node 20, Trout Creek above <br />Milner, of calibrated model output and observed: <br />9. Mean monthly discharge------------------------------ 22 <br />10. Mean monthly dissolved-solids concentration--------- 23 <br />11. Total monthly load---------------------------------- 24 <br />12-14. Graphs showing a comparison at node 27, Yampa River below <br />diversion, near Hayden, of calibrated model output and <br />observed: <br />12. Mean monthly discharge------------------------------ 25 <br />13. Mean monthly dissolved-solids concentration--------- 26 <br />14. Total monthly load---------------------------------- 27 <br /> <br />iii <br />