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
No rain for 24 hours. 1.0" rain in the last 7 days. 5-10 mph SE wind. Sunny with cumulus clouds. Outgoing tide with eelgrass and sago river grass floating on water surface.
A manatee was spotted 200' downstream 2 days before the water test. 2-19" redfish caught this week.
Blue heron nesting in dead cypress tree across the river on the marsh inland adjacent Point Legere.
No salt content was noted at surface water, 18" below surface, or 6" above bottom of river.
Cyanobacteria(?) colonies (small dots) noted in water.
Bryozoan Pectinatella magnifica found under pier at sample site.
Water is warming up due to reduced rainfall this week and high temperatures (90 degrees F).
0.01" rain last 7 days.
Wads of sago pond grass floating with outgoing tide.
No salt (0 ppt) detected at surface or 18" below surface water with refractometer.
Small numerous dots (algae?) in water.
2.3" rain in last 7 days at sample site. 3.68" of rain in last 18 days. Humidity at 90% at sampling time. 3 to 5 mph SE wind. Hazy with cumulus clouds. Outgoing tide.
Thousands of water striders (Gerridae) on water surface. Long thin river grass strands floating on top of water. Lots of thin 3-d web like river grass has grown in shallow waters and is being flushed out by rain waters into the main river channel.
Some rain almost every day appears to be keeping the salt water out of the river at test site.
North wind 5-10 mph. Subtropical depression about 100 miles to the east. Samples taken at surface, 18" from surface, and 6" from bottom all had 0 PPT salt content.
Very little rain the last three weeks. 0.15" rain in previous 24 hrs.
Salinity using refractometer at depths:
Surface - 1 ppt
18" below surface - 1 ppt
6" from bottom - 1.5 ppt
Sunny. Cumulus clouds. 5-6 mph NNE wind
Salinity at surface 0 ppt
Using a remote sampler:
18" from surface 1 ppt
6" from bottom 1 ppt
0.1" rain in past 10 days. Sunny, no clouds today. Nigh pressure. Rising tide. Small shad schools are in river. Red fish and speckled trout are being caught at the test site at night (sometimes). Fishing success varies significantly. Long nose gar fish are commonly seen at night under the light. Bald eagle was seen downstream this week. Seagulls and brown pelicans are in area frequently. Blue birds have flown through and nested. Humming birds are frequenting bird feeders.
Salinity using refractometer:
at surface 0.0 ppt
using a remote sampler:
18" below surface 1 ppt
6" from bottom 1 ppt
No rain for past 7 days. High tide. Stratus clouds. Very sunny. 4-8 mph SE wind.
No rain for the past 7 days. Observation at high tide. Very sunny. Stratus clouds up high. 3-8 mph SE wind. A few pelicans "fishing" out front.
Salinity at immediate water surface was zero (0) using the refractometer.
Using a remote sampler to obtain sample :
18" below surface 1 PPT.
6" above bottom 1 PPT
Beautiful day. Sunny w/clouds. West Wind 1-5mph. Tide medium low.
0.5" of rain two days prior to observation.
Birds: Eastern blue birds are passing through and nesting in bird houses near river. Humming birds have arrived. Seagulls and terns are on river along with Canadian geese and brown pelicans after bait fish. Saw several Rose-Breasted Grosbeak migrating through area back up north.
Storm front approaching from NW. Wind out of South 22 mph. Will rain in 2-3 hours. (Rainfall was about 0.8" in the drainage area involved).