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

Figure 133. Boxplot depicting historical median and quartiles of TSS levels in the Trinity River
Basin (source: TCEQ SWQM database, Map of segments = Figure 2). .................................... 118
Figure 134. Location of water quality studies historically conducted within the Trinity River
basin. ........................................................................................................................................... 119
Figure 135. Discharge and difference in nitrogen, phosphorus and sediment loads for sites above
and below Livingston Reservoir, 1974-88 (Load differences were calculated by subtracting the
loads below Livingston Reservoir from the loads above Livingston Reservoir.) Reprinted from:
(Van Metre and Reutter 1995). ................................................................................................... 124
Figure 136. Historical Estimates of nitrogen loads. Source: (Jensen et al. 1991). ................... 126
Figure 137. Total nitrogen loads estimated presented and cited by (Jensen et al. 2003). Original
source: (Clingenpeel 2002)......................................................................................................... 126
Figure 138. Average Daily Loads of total nitrogen and total phosphorus to and from Lake
Livingston. From: (Jensen et al. 2003). ...................................................................................... 127
Figure 139. Comparisons between total nitrogen and phosphorus removal. Sources:
(Clingenpeel 2002; Jensen et al. 2003)....................................................................................... 128
Figure 140. Estimated loads of total suspended solids into Galveston Bay from the Trinity River
at Romayor and from the San Jacinto River from 1969 through 1988. Source: (Armstrong and
Ward Jr. 1993) ............................................................................................................................ 128
Figure 141. Estimated loads of total nitrogen into Galveston Bay from the Trinity River at
Romayor and from the San Jacinto River from 1969 through 1988. Source: (Armstrong and
Ward Jr. 1993) ............................................................................................................................ 129
Figure 142. Estimated loads of total phosphorus into Galveston Bay from the Trinity River at
Romayor and from the San Jacinto River from 1969 through 1988. Source: (Armstrong and
Ward Jr. 1993) ............................................................................................................................ 129
Figure 143. Location of geomorphology study sites based on recent Trinity River literature
review.......................................................................................................................................... 130
Figure 144. Location of major geomorphic zones within the Trinity River. Source: (Phillips
2008). Map taken from Phillips 2008. ........................................................................................ 131
Figure 145. Location of published and unpublished fish studies archived in the EIH Trinity
River database that were used to document the historical distribution of fish species in the Trinity
River basin. ................................................................................................................................. 140
Figure 146. Fish collections by Ecoregion. ............................................................................... 141
Figure 147. Numbers of fish taxa reported during each study within the Trinity River basin. . 142
Figure 148. Major land use categories present in the Trinity River basin................................. 143
Figure 149. Location of fish collections obtained from literature review. Waterbody code is the
TCEQ segment number (see Table 2). Code 0000 denotes collections from uncertain locations
or tributaries without a TCEQ segment number. Data includes collections from fish kills and
reservoirs..................................................................................................................................... 144
Figure 150. Location of fish collections obtained from literature review. Data from reservoirs
and fish kills included. ................................................................................................................ 144
Figure 151. Original fish guilds identified from cluster analysis of life history characteristics
including trophic level, water quality tolerance and reproductive behavior. (Balon level 1)..... 147
Figure 152. Fish guilds identified from cluster analysis based on life history characteristics
including trophic level, water quality tolerance and reproductive behavior. (Balon level 1).
Species list based on abbreviated list using some of the recommendations of TPWD (Mosier per.
comm.) ........................................................................................................................................ 152
Figure 153 . Occurrence of focal fish species and associated flow measurements. Excludes fish
kill and reeservoir data. Period of record 1989 to 2007. (jitter added to data display).............. 158
11
Environmental Institute of Houston Trinity River Basin
November 17, 2009
Biological Overlay