Ecological Overlay for the Trinity River for support of Development of ...

Figure 20. Monthly median, interquartile range (boxes), extended range (1.5 X quartile = line)
and outliers (*) for daily average flows recorded at the USGS Trinity near Rosser (08062500)
gage from 1939 through 2008....................................................................................................... 50
Figure 21. Monthly mean and 95% confidence intervals for daily difference in average daily
flows between successive dates recorded at the USGS Trinity River near Rosser (08062500)
gage from 1939 through 2008....................................................................................................... 50
Figure 22. Average daily flows recorded at the USGS Trinity River near Trinidad (08062700)
gage from 1965 through 2008....................................................................................................... 51
Figure 23. Monthly mean and 95% confidence intervals for daily average flow recorded at the
USGS Trinity River at Trinidad (08062700) gage from 1965 through 2008. .............................. 51
Figure 24. Monthly median, interquartile range (boxes), extended range (1.5 X quartile = line)
and outliers (*) for daily average flows recorded at the USGS Trinity near Rosser (08062500)
gage from 1939 through 2008....................................................................................................... 53
Figure 25. Monthly mean and 95% confidence intervals for daily difference in average daily
flows between successive dates recorded at the USGS Trinity River at Trinidad (08062700) gage
from 1965 through 2008. .............................................................................................................. 53
Figure 26. Average daily flows recorded at the USGS Trinity River near Oakwood (08065000)
gage from 1924 through 2008....................................................................................................... 54
Figure 27. Monthly mean and 95% confidence intervals for daily average flow recorded at the
USGS Trinity River near Oakwood (08065000) gage from 1924 through 2008. ........................ 54
Figure 28. Monthly median, interquartile range (boxes), extended range (1.5 X quartile = line)
and outliers (*) for daily average flows recorded at the USGS Trinity near Oakwood (08065000)
gage from 1924 through 2008....................................................................................................... 55
Figure 29. Monthly mean and 95% confidence intervals for daily difference in average daily
flows between successive dates recorded at the USGS Trinity River at Oakwood (08065000)
gage from 1924 through 2008....................................................................................................... 55
Figure 30. Average daily flows recorded at the USGS Trinity River near Crockett (08065350)
gage from 1964 through 2008....................................................................................................... 56
Figure 31. Monthly mean and 95% confidence intervals for daily average flow recorded at the
USGS Trinity River near Crockett (08065350) gage from 1964 through 2008. .......................... 56
Figure 32. Monthly median, interquartile range (boxes), extended range (1.5 X quartile = line)
and outliers (*) for daily average.................................................................................................. 57
Figure 33. Monthly mean and 95% confidence intervals for daily difference in average daily
flows between successive dates recorded at the USGS Trinity River near Crockett (08065350)
gage from 1964 through 2008....................................................................................................... 57
Figure 34. Average daily flows recorded at the USGS Trinity River at Romayor (08066500)
gage from 1925 through 2008....................................................................................................... 58
Figure 35. Monthly mean and 95% confidence intervals for daily average flow recorded at the
USGS Trinity River at Romayor (08066500) gage from 1925 through 2008. ............................. 58
Figure 36. Monthly median, interquartile range (boxes), extended range (1.5 X quartile = line)
and outliers (*) for daily average.................................................................................................. 59
Figure 37. Monthly mean and 95% confidence intervals for daily difference in average daily
flows between successive dates recorded at the USGS Trinity River at Romayor (08066500)
gage from 1925 through 2008....................................................................................................... 59
Figure 38. Trends in dissolved oxygen measured at the TCEQ monitoring site 10925 located
downstream of SH 34 in segment 0805 of the Trinity River from 1971 through 2008................ 64
Figure 39. Trends in dissolved oxygen measured at the TCEQ monitoring site 10925
downstream of SH 79 in segment 0804 of the Trinity River from 1972 through 2008................ 64
5
Environmental Institute of Houston Trinity River Basin
November 17, 2009
Biological Overlay