WRIR 02-4030 Streamflow and Water-Quality Data for Selected Watersheds in the Lake Tahoe Basin, California and Nevada, through September 1998	Table of Contents
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FIGURES

1-7. Maps showing:

1.  Lake Tahoe Basin and selected monitored watersheds

2.  Incline Village area, Nev., and LTIMP sampling stations

3.  Glenbrook area, Nev., and LTIMP sampling stations

4.  Stateline area, Nev., and LTIMP sampling stations

5.  South Lake Tahoe area, Calif., and LTIMP sampling stations

6.  Tahoe City to Meeks Bay area, Calif., and LTIMP sampling stations

7.  Geology of selected monitored watersheds in Lake Tahoe Basin

 

8.  Graphs of: (A) total annual precipitation water years 1915-98, Tahoe City, Calif., and (B) Median monthly precipitation water years 1915-98 and 1988-98 at a national weather station at Tahoe City, Calif.

9.  Map showing average annual runoff for 10 primary LTIMP stations for water years 1989-98

10.  Map showing unit runoff and unit-runoff rank for 10 primary LTIMP stations for water years 1988-98

11.  Plots for Incline Creek near Crystal Bay, a representative LTIMP gage station, for water years 1988-98: (A) Annual discharge, and (B) Median monthly and seasonal runoff

12.  Plots for Upper Truckee River at South Lake Tahoe, a representative LTIMP gage station: (A) Annual discharge for water years 1984-98, and (B) Median monthly and seasonal runoff for water years 1988-98

13.  Time-series plots of nutrient and suspended-sediment concentrations for Incline Creek near Crystal Bay

14.  Time-series plots of nutrient and suspended-sediment concentrations for Upper Truckee River at South Lake Tahoe

15.  Plots of nutrient and suspended-sediment concentrations versus streamflow for Incline Creek near Crystal Bay

16.  Plots of nutrient and suspended-sediment concentrations versus streamflow for Upper Truckee River at South Lake Tahoe

 

17-19.  Plots for Incline Creek near Crystal Bay, a representative LTIMP station: (A) monthly loads, and (B) loads by month and season with seasonal medians:

17.  Nitrogen nutrients, water years 1988-98

18.  Phosphorus nutrients, water years 1988-98

19.  Biologically reactive iron and suspended-sediment concentrations, water years 1991-98 and 1988-98, respectively

 

20-22.  Plots for Upper Truckee River at South Lake Tahoe, a representative LTIMP station: (A) Monthly loads, and (B) loads by month and season with seasonal medians:

20.  Nitrogen nutrients, water years 1984-98 and 1989-98

21.  Phosphorus nutrients, water years 1984-98

22.  Biologically reactive iron and suspended-sediment concentrations, water years 1984-98

 

23-29. Maps showing median monthly loads for 10 primary LTIMP stations for period of comparison, water years 1988-98:

23.  Dissolved nitrite plus nitrate nitrogen

24.  Dissolved ammonia

25.  Total nitrogen

26.  Soluble reactive phosphorus

27.  Total phosphorus

28.  Biologically reactive iron

29.  Suspended sediment

 

30-31.  Graphs showing within-watershed comparison of streamflow and nutrients and suspended-sediment concentrations at selected stations:

30.  Three Incline Creek watershed stations, water years 1991-98

31.  Three Upper Truckee River watershed stations, water years 1991-98

 

32-38. Maps showing median monthly yields and yield ranks for 10 primary LTIMP stations for period of comparison, water years 1988-98:

32.  Dissolved nitrite plus nitrate nitrogen

33.  Dissolved ammonia

34.  Total nitrogen

35.  Soluble reactive phosphorus

36.  Total phosphorus

37.  Biologically reactive iron

38.  Suspended sediment

 

39.  Map showing overall yield ranks for 10 primary LTIMP stations for period of comparison, water years 1988-98

 

40-46.  Maps showing trends in nutrient and suspended-sediment concentrations for 10 primary LTIMP stations for period of records:

40.  Dissolved nitrite plus nitrate nitrogen

41.  Dissolved ammonia

42.  Total nitrogen

43.  Soluble reactive phosphorus

44.  Total phosphorus

45.  Biologically reactive iron

46.  Suspended sediment