Dog River at Mouth of Robinson Bayou
Mobile, Alabama, United States
This site normally has a 36"-24" high tide rise above the low tide every day. River Depth can run 3'-12' within 300' of site. Water velocity is about 2 mph when the tide is running. This site is a brackish transition zone (fresh and salt water), depending upon the daily rainfall, wind, storms, and tides. The water is very salty in drought conditions. It is fresh when there is a lot or rainfall. There are a lot of species (red fish, speckled trout, crabs, manatee, catfish, bait fish,alligator gars, alligators, brown pelicans, osprey, bald eagles, migratory birds) which inhabit or migrate through this area. Porpoise were seen from this site in early summer 2017. Flora and fauna may be changing from fresh to salt due to salt water intrusion due to the ocean rise. The marsh around cypress trees is eroding due to boat traffic. Cypress trees in marshes are slowly dying (5-7 trees in 4-5 years). Flora and fauna may be changing from fresh to salt due to salt water intrusion due to the ocean rise. Bacteria (e-coli) warnings occur during heavy rainfalls due to sanitary sewers overflowing upstream.
Location created by
David Strain
- Group: Dog River : Dog River Clearwater Revival
- Lat: 30.6108979
- Lng: -88.0880356
- Waterbody Type: River
- Timezone: America/Chicago
Latest photos
0.1" rain the last 24 hrs. 1.3" rain the last 7 days (rain off and on the last 7 days).
Wind 4mph NE. Foggy. 1.6m deep.
Salinity at surface, 18", and 6" above bottom was consistent at 1PPT.
Low rising tide.
No rain the last 48 hrs. 1.2" of rain the last 7 days.
Temps 44-66. Clear, sunny, 1-4 mph NNW wind.
Rising tide.
Small scattered oil slick about 1' x 10'.
Similar, but larger oil slick was visible at site two weeks ago.
Salinity at surface 0.5 PPT, 18" from surface 0.5 PPT, and 6" from bottom 1.0 PPT.
Rising low tide. Salinity at surface and 6" from bottom 2.5 PPT using remote sampler.
Cold front passing through. Clear skies/no clouds. North wind 4-5 mph with 15 mph gusts. No rain for past 48 hours. 0.8 inches of rain the past 7 days. No debris/plants floating in water around monitor site. 2 fishing boats about 200' to north.
2 flocks (6-8) of Canadian geese flew by during monitoring.
No animal activity noted in water.
Salinity at 18" below Surface and 6" from Bottom using remote sampler:
Surface: 6PPT at Surface
18" from Surface: 6PPT
6" from Bottom: 6PPT
Sunny w cumulus clouds, brisk 5-8 NW wind
0.45" rain last 24 hours
falling tide (medium level)
No vegitation floating on surface
redfish noted in area
No rain for the last 72 hours. Sunny with cumulus clouds. NE wind 3-5. Beautiful day. Eel grass floating on surface and female eel grass n adjacent areas are starting to send out spirals with seeds. Eel grass appears to have started growing in front of bulkhead at site in 24"-30" of water at low tide.
Salt content:
at surface- 0 PPT
18" below surface - 1PPT
6" from bottom - 1 PPT
Alligator gars and redfish were observed at site during the night under light.
Numerous aquatic plants are blooming on marsh islands within 500' of monitoring site.
Mosquito dragonflies are often seen at site.
Numerous birds frequent the immediate area: brown pelicans, terns, seagulls, black birds, osprey, blue heron, heron, and various other water birds.
Tropical storm Gordon is 60 miles off shore. Cloudy. 5-10mph SSE wind. Falling tide. Pieces of eel grass on water surface. Large ripples on water surface, but no waves or white caps.
Falling tide. Water green in color. Sunny with cumulus clouds. Hot & humid. SE Wind 3-5mph. Scattered eel grass floating on surface. Sago Pondweed wads almost disappeared. 0.3" rain in last 24 hrs. 0.93" of rain the last 7 days.
Using a remote sampler for salinity samples:
At surface - 2 ppt
18" below surface - 2 ppt
6" above bottom - 4 ppt.
Salinity at 2 PPT at surface, 18" below surface, and 6" above the bottom.
Hot with cumulus clouds. S wind 5-10 mph. Sago river weed in smaller, thinner groups than a weed ago. Duckweed on top. Saw some hya
Pelicans roosting in cypress trees on adjacent island. Thousand of 1" fish in river grass about 300' downstream. Numerous dragon flies around monitor site.
No rain the last 3-4 days. 1.7" of rain the last 7 days.
Numerous river grasses blooming in marsh areas.
Sample taken at low tide...ride rising. Fewer wads of sago pond weed in river as only a little rain the last several day. Green scum on top of some sago pondweed.
Hot and muggy the last several days. South wind 2-5mph.
Dragon flies are in the area.
Blue birds have hatched and left area. Cardinals have hatched and hanging around the area. Wrens in the wharf house room have hatched and moved out.
Added note for 6 July 2018 observation:
Jelly blob on the tree branch taken out of the water is a Bryozoan Pectinatella magnifica...tiny colonial animals that can form jelly-like masses, which are often found attached to sticks or docks. Bryozoan colonies can be as much as a foot in diameter. Freshwater bryozoans improve water quality. For more info check
http://www.wright.edu/~tim.wood/bryozoan-s.html