14 Apr. 99. Benthic samples. Stations A & B water up, .35m depth, salimty 13.78%o. Station C, salinity 4.84%o 

 from diversion channel. Station D, water very turbid, 15.78%o, some large fish swirls probably reds, drum and 

 mullet. Stations E & F water .27 & .35 m, large school of redfish at Station F, tails out of water (see slide). 

 Station G, tresde, 21.86%o slight out-going tide. 



15 Apr 99. Primary production. Conditions similar to 14 Apr. 99 except wind much stronger, NW-20 MPH. 

 Water flowing over dam at Nueces River. Station H=68, 0.44%o. 



24 May 99. Primary production. Stations A & B, dense beds of Bjtppia, salinity, 16-18%o. Stations C & D, 

 water muddy, lot of fish activity at both sites, redfish at Station D, caught some brown shrimp with push-net at 

 Station C. Station E & F, lot of small fish, shrimp and redfish activity. Station H=68, river 2.02%o, water 

 seeping over dam, no flow. 



9 June 99. Primary production. Stations A & B, dense beds of Ruppia up to surface, low ox}'gen 1 .95 to 1 .49 

 ppm (mg/1), salinity 24-25%o. Stations C & D, 20 to 35%o. Station E, 39%o, at least 1 redfish and lot of bait- 

 fish. A little water in algal flat was 1 10%o, dead Cyprinodon and brown shrimp 8 to 9.5 cm long in algal flat 

 area. Probably trapped in evaporating pools left by low tides. Station F, lot of mullet and small bait swirls and 

 a few redfish. 



7 July. 99. Benthic samples. Stations A & B, salinity down to 8.3%o, oxygen low 1.59 to 1.7 ppm. (mg/1), 

 Ruppia present but not as thick as it was in May and June. Freshwater inflow event, salinity down at Stations C- 

 F, to 1.3 to 6.3%o. Rattiesnake at road right before Station D. Strong flow of freshwater from Station D to E 

 & F. Station E, algal flat 10%o, algal mat green near shallow edges, gray and floating in deeper areas, no mats 

 visible at Station E. 



21 July 99. Primary productions. Stations A & B, oxygen low 1.6 ppm (mg/1) depth .21 to .27 m. Stations C 

 to F, salinity still low 4.2 to 13.6%o. Station C oxygen 3.2 ppm. Station H=68, river, 0.6%o. 



19 Aug, 99. Primary production. Stations A & B, water diytng up, dead blue crabs in standing water, few live 

 crabs along edges of bank out of water to get air, lot of shore birds in what litde water left. No water where we 

 normally sample, water taken by culvert for A & B. Stations C & D, water low, salinity 26 to 45%o, lot of 

 wading birds, ~ 6 dead black drum carcasses on shore. Station E, no water ("I told you so!") says Ms, Tinnin. 

 Station F, .05 m, 39%o. Station H=68 river, 0.48%o, barely flowing over dam. 



16 Sept. 99. Primary production. Stations A & B, water back as result of rain and tides from hurricane Bret. 

 Ruppia starting to grow along shorelines. Station C to F salinity 0.93 to 8.51%o. Station D current coming in 

 from the bay, blue -green algal floating on surface, lot of fish activity, water turbid. Stations E and F, lot of fish 

 and mullet, reds, shrimp. Algal flat at Station E, 2%o. Blue green algal floating at Stations E & F. Station 

 H=68, river 0.43%o, flow over dam. 



28 Oct. 99. Benthic and primary production samples. Stations A & B, Ruppia growing along shoreline. Station 

 C, lot of white shrimp, white pelicans and avocets. Station D, water real low, ponding between C & D, white 

 shrimp jumping by culvert. Stations E & F, 16 & 15%o, Station H=68, river 1.22%o, no flow over dam. 



17 Nov. 99. Primary production. Stations A & B water soupy green, 15 to 14%o, Ruppia along shoreline. 

 Stations C & D, water clear 1 1 to 1 9%o, numerous bird tracks, no shrimp. Station E, water clear 25%o, Station 

 F, SE wind began blowing and quickly stirred up sediment, now very turbid. Station H=68, river 0.85%o, no 

 flow over dam. 



8 Dec. 99. Primary production. YSI instrument not working. Only refractometer for salinity. Station A & B, 

 15 to 14%o. Station C, D, E and F, 10, 12 and 25%o. Station H=68 0%o, scattered showers. 



Nueces River Diversion Channel Water Exchange 



At the February, 1 999 Rincon Bayou Demonstration Project team meeting there was some concern in the 

 accuracy of the exchange rates of water moving through the diversion channel into and out of upper Rincon 

 Bayou. During at least six sampling trips to Rincon Bayou we checked the hydrographic conditions, the flow 



G-4 ^ Field Notes and Observations from Benthic Sampling Trips 



