Abstract

_ ________________________ Introduction. _______________________ General features of the study area. Collection of data.____.-_-._____ Acknowledgments. ______________ Environmental analyses._____________ Variations in water temperature. __ Influence of reservoir discharges. _. Monthly water temperatures. _ Daily water temperatures--.-. Frequency analyses._________ Conclusions.._ _____________________ References_ _______________________ Kl 1 2 5 5 6 6 11 11 17 27 27 30 ILLUSTRATIONS Page FIGURK 1. Map showing location of temperature-monitoring sites and streamflow-gaging stations.___-__-__________-_K3 2. Graph showing monthly mean water temperature in the upper Delaware River from Narrowsburg to Barryville and monthly mean air temperature at Deposit and Port Jervis, 1964-67______-__-____-_____--___---__ 7 3. Graph showing relation of monthly mean water and air temperatures from Narrowsburg to Barryville, MaySeptember 1964-67, described by linear-regression analysis.__-_--__-_-___-------_--------__-----_-9 4. Graphs showing monthly mean water temperatures on the main stem Delaware River at Callicoon and Lordville, on the East Branch Delaware River at Hancock, and on the West Branch Delaware River at Hale Eddy and Stilesville, and monthly mean air temperature at Deposit, May-September 1964-67. ____________________ 10 5. Graph showing monthly mean temperature of the West Branch Delaware River at Stilesville and monthly mean air temperature in the upper Delaware River basin, May-September 1963.__________-_----_-----_-_--_ 12 6. Graphs showing monthly mean water temperature, air temperature, and streamflow of the West Branch Delaware River, May-September 1963-67. ---------13 7. Graphs showing monthly mean water temperature, air temperature, and streamflow in the East Branch Delaware River, May-September 1964-67----------14 in IV CONTENTS Page FIGURE 8. Graph showing estimated relation of monthly mean stream and air temperatures at Stilesville, May-September 1964-67, assuming no reservoir effect_______________ K16 9-14. Graphs showing 9. Monthly mean discharge and monthly mean ranges of water temperature at Stilesville and of air temperature at Deposit, May-September 1963-67__-_ ___--_-__--____----___--____-_ 18 10. Monthly mean ranges of water temperature at Hale Eddy and of air temperature at Deposit, May-September 1964-67__________________ 19 11. Water temperature and discharge in the upper Delaware River basin, May-September 1967_ __ 20 12. Double-mass curve cumulative air temperature at Deposit versus cumulative water temperature at Hale Eddy, June 19-30, 1966-_____________ 22 13. Hourly air and water temperatures in the upper Delaware River basin, June 20-26, 1966_ ______ 24 14. Water temperature range and discharge at Stilesville and air temperature range at Deposit, June-August 1966________________________ 25

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