Tag Archives: USGS

First flush 2018-10-31

Was there rain Wednesday? That might explain the sudden spikes at US 41 on the Withlacoochee River, at GA 133 on the Little River, and at State Line on the Withlacoochee River. We can guess that the rains Thursday and Friday (today) have washed away whatever that very odd spike was at the state line.

Graph, Withlacoochee Basin

Thanks to Valdosta Utilities and Valdosta City Clerk Teresa Bolden for sending this Wednesday’s Valdosta water quality testing data before the end of Friday. For more contact, see http://wwals.net/issues/vww/.

State Line, Withlacoochee River, Withlacoochee Basin

It’s a very odd spike, because Continue reading

Low bacterial counts at State Line Ramp 2018-10-24

Valdosta’s bacterial counts are always low at State Line Ramp (Mozell Spells), where we moved the WWALS Boomerang paddle race from Georgia to Florida and back.

State Line, Withlacoochee River, Withlacoochee Basin

Things were generally better last week in the Withlacoochee Basin, except for the Little River at GA 133, just above Troupville Boat Ramp. Continue reading

Five weeks and fecal coliform down 2018-10-17

Fecal coliform went down last week to 195 at US 41 and 200 at GA 133 on the Withlacoochee River, right at the Georgia limit of 200 cfu/100 ml, while rising slightly at US 41 and at the GA-FL line at the Madison Highway Horn Ferry Bridge, according to Valdosta’s testing.

Graph, Withlacoochee Basin

Wednesday of this week, we still don’t know, because Continue reading

Suwannee tributaries flooding 2018-08-07

Once again, as during Hurricane Irma, recent rains are causing flooding on Suwannee River tributaries.

Suwannee River Basin, Map

The Withlacoochee River at Skipper Bridge and at US 41 (North Valdosta Road) is in Near Flood Stage, as is the Suwannee River at Fargo, and the New River near Lake Butler.

Already in Minor Flooding are Continue reading

Global Croplands, Suwannee River Basin

You can see on these maps that the Suwannee River Basin is massively agricultural, except where it’s forestry or swamp or other wetlands. Thus it’s no wonder that most of the nitrate runoff problem here is due to agriculture, as shown in the Basin Management Action Plans (BMAPs).

Basin Wide, Maps

WWALS Science Committee Chair Tom Potter points to this Global Croplands map to illustrate the BMAP issues. The question remains of whether agricultural best management practices as advocated in the recent BMAP meetings will be sufficient to deal with the problem, considering they haven’t decreased it in the past decade.

Global Croplands About: Continue reading

Rivers Seven Days After Irma 2017-09-17

Looks like we may finally see Action stage tomorrow on the Withlacoochee River above Valdosta @ Skipper Bridge Road. This is upstream from Valdosta’s Withlacoochee Wastewater Treatment Plant, so it’s a good thing that didn’t spill during Irma. The Alapaha River at Statenville peaked Tuesday and probably would be a fine ride (what shoals?) today. The New and The Santa Fe Rivers are still flooding, and that’s still raising the Suwannee River all the way to the Gulf, and there’s minor flooding all the way up at Fargo, so another surge of high levels may follow on the Suwannee. The I-75 Santa Fe River bridge never did close.

2017-09-17 Withlacoochee River above Valdosta @ Skipper Bridge Road
2017-09-17 Withlacoochee River above Valdosta @ Skipper Bridge Road

The Suwannee River at White Springs peaked Continue reading

River Gage Projections after Hurricane Irma 2017-09-14

Update 2017-09-15: On the seventh day.

Update 2017-09-15: Added Suwannee River at Wilcox @ US 19, plus another image for the Gage Map.

Hurricane Irma flooded the Suwannee River at White Springs, the Santa Fe River especially at Fort White, with a new record for the New River new Lake Butler. It did not flood the Withlacoochee or Alapaha Rivers.

N2017-09-14 Suwannee River at White Springs
2017-09-14 Suwannee River at White Springs

FDOT says the I-75 bridge over the Santa Fe River Continue reading

River Gage Projections for Hurricane Irma 2017-09-10

Update 2017-09-15: On the seventh day.

Hurricane Irma is bringing flood levels on on most of the rivers in the Suwannee River Basin. Here are the gages with projections from downstream to upstream, since Irma is coming from the south. The images here are static to show this moment, but click on any image to go through to the live gage.

Suwannee River

Suwannee River at Fowlers Bluff

Suwannee River at Fowlers Bluff

Suwannee River at Branford @ US 27

Continue reading

Revised Hydrogeologic Framework of the Floridan Aquifer System 2016-03

Salt water intrusion inland is worse than you think, including the “Apalachicola salinity feature” up to the GA-FL line and east through Lowndes County, with a special additional brackish Valdosta feature. Central north Florida is an island of fresh groundwater surrounded by entire saline Florida coast around from Alabama plus across to Brunswick, GA, then again from Savannah up past Charleston. South of Lakeland, FL the map is all red for saline.

Figure 53. Estimated altitude of the 10,000-milligrams-per-liter (mg/L) total dissolved solids boundary, southeastern United States.
Figure 53. Estimated altitude of the 10,000-milligrams-per-liter (mg/L) total dissolved solids boundary, southeastern United States.

Apparently using the data preliminarily mapped earlier in the Florida Well Salinity Study, geologists from three states connected the dots in Revised Hydrogeologic Framework of the Floridan Aquifer System in Florida and Parts of Georgia, Alabama, and South Carolina, By Continue reading

Videos, Valdosta Wastewater and Flood Prevention 2016-10-27

The crowd was very attentive to every word about wastewater and flood prevention, with officials from the City of Valdosta presenting in the first of a new quarterly WWALS speaker series. If you didn’t come, you can see and hear in these videos Henry Hicks about wastewater, Emily Davenport about flood prevention, Tim Carroll about solar power, and Sementha Mathews about how to get more information from Valdosta. WWALS Treasurer and acting Executive Director Gretchen Quarterman opened and closed the meeting.

Each talk had many small but important stories, so we will probably blog more posts about those. Meanwhile, here are the videos: see for yourself! Continue reading