The monitoring network within this area

Hydrionis holds 297 values from 3 gauges within it. Discharge is a property of a gauge and its reach, not of this drainage area, so this page reports the network and its records rather than a single figure.

Gauges

297

Values held

1841–2026

Record spans

Gauges within the Middle Chattahoochee-Walter F huc8 subbasin

3 monitoring points, positioned as the publisher records them.

Flood peaks, as measured

This gauge's flood record, as measured. Unlike a daily mean it is the discharge at the moment the river was highest, which is the figure flood frequency analysis is built on.

Largest measured flow of each year at CHATTAHOOCHEE RIVER AT COLUMBUS, GA

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1841–2001.

Published by the gauge's own operator from its sub-daily record; Hydrionis stores the figure rather than recomputing it. A year the gauge did not cover produces no value rather than a low one, and the gaps are stated below the chart. A peak is a property of this gauge and its reach: a larger flood upstream or downstream of it is not in this series.

What the shaded periods are (0 events)

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	CHATTAHOOCHEE RIVER AT COLUMBUS, GA (m³/s)
1841	3,200
1886	4,361
1913	3,030
1919	4,870
1925	3,766
1929	5,607
1930	1,303
1932	1,019
1934	1,393
1935	1,022
1936	2,398
1937	1,557
1938	2,313
1939	1,671
1940	1,158
1941	473
1942	2,336
1943	2,888
1944	2,050
1945	1,948
1946	1,773
1947	1,532
1948	2,319
1950	459
1951	682
1952	1,637
1953	1,257
1955	858
1956	1,464
1957	2,112
1958	1,175
1959	1,005
1960	1,674
1961	4,106
1963	1,158
1964	3,964
1965	1,566
1966	2,203
1968	1,303
1969	1,892
1970	2,469
1971	3,115
1972	2,005
1974	1,085
1975	2,546
1976	1,478
1977	1,640
1978	2,124
1979	2,064
1980	1,710
1981	2,087
1982	1,529
1983	1,606
1985	1,266
1986	493
1987	1,096
1988	694
1989	1,274
1990	2,798
1991	1,144
1992	895
1994	1,954
1995	1,337
1996	1,951
1997	1,572
1998	2,129
1999	558
2000	668
2001	1,730

About this series

Everything below is a property of the data rather than a rating of it. There is deliberately no single confidence score: how much a gap matters depends on what you are about to do with the series, and only you know that.

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Measured
Period held	1841–2001
Completeness	42.9% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	14 separate periods inside 1841–2001 hold no value. The longest runs from 1842 to 1885 — 44 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1841 and is not continuous from it: 161 years separate the first value from the last, and 43% of the years between them are held. The span is not the record.
Last read from the publisher	2026-10-01
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

How much of the rain came back out

A discharge in cubic metres per second cannot be compared with anything: the larger number may only mean the larger catchment. Divided by the area draining to the gauge it becomes a depth of water over that land, which answers a question a reader already has — of the rain that fell here, how much came back out as river?

Water leaving the catchment above CHATTAHOOCHEE RIVER AT 14TH ST, AT COLUMBUS, GA, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1930–2025.

Show relevant events (1 event)Shading marks when something was recorded, not what caused the line.

Computed by Hydrionis from the published annual mean flow and the catchment area the station's own publisher states. It is not a water balance: the difference between rainfall and runoff is not evaporation alone but also change in groundwater storage, water abstracted and taken elsewhere, and water imported by transfer schemes — which is why a catchment can yield more runoff than the rain that fell on it without anything being measured wrongly. A different area figure rescales every value here by the ratio between them.

What the shaded periods are (1 event)

A shaded period marks when something was recorded, not what caused the shape of the line. Where the two coincide, they coincided.

Documented record — A documented event, compiled from cited sources after it happened. The dates are as good as the record, which for older events can mean the month rather than the day.

Event	Type	Period	Standing	Authority
Hurricane Katrina water and sanitation collapse	Flood	2005-08-29 – 2005-09-30	Documented record	Compiled record

Not shown on this chart

The 1976 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
The 2022 drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Yorkshire drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cantareira water crisis, São Paulo — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
Cape Town Day Zero — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.
European drought — This event’s area does not contain this chart’s subject. Sharing a country is not sharing an event, so it is not drawn.

View the data behind this chart

Underlying data
Period	CHATTAHOOCHEE RIVER AT 14TH ST, AT COLUMBUS, GA (mm)
1930	468
1931	298
1932	591
1933	466
1934	395
1935	360
1936	756
1937	619
1938	409
1939	452
1940	389
1941	280
1942	443
1943	551
1944	559
1945	480
1946	616
1947	510
1948	744
1949	655
1950	371
1951	356
1952	475
1953	553
1954	301
1955	295
1956	323
1957	373
1958	405
1959	396
1960	508
1961	652
1962	560
1963	487
1964	870
1965	499
1966	581
1967	586
1968	483
1969	448
1970	380
1971	557
1972	563
1973	663
1974	496
1975	757
1976	620
1977	512
1978	490
1979	598
1980	631
1981	321
1982	552
1983	655
1984	578
1985	382
1986	268
1987	427
1988	272
1989	551
1990	695
1991	568
1992	616
1993	571
1994	562
1995	555
1996	629
1997	589
1998	658
1999	272
2000	231
2001	343
2002	300
2003	737
2004	483
2005	647
2006	339
2007	241
2008	235
2009	612
2010	493
2011	323
2012	239
2013	537
2014	396
2015	464
2016	398
2017	321
2018	564
2019	588
2020	786
2021	557
2022	491
2023	461
2024	494
2025	385

About this series

Source	United States Geological Survey — National Water Information System · US Government work — public domain
How the values came to exist	Derived Computed by Hydrionis
Period held	1930–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1930 to 2025 is held.
Inputs last read	2026-10-01 · when the records this was computed from were last read from their publishers
Calculation date	2026-08-24 · when the calculation method was last versioned, not a reading of any publisher
Redistribution	Permitted by the upstream licences
Commercial reuse	Permitted by the upstream licences. No Hydrionis access tier can widen this.
Methodology	How this was produced

Every gauge Hydrionis holds within this area

Gauges within the Middle Chattahoochee-Walter F and what each holds
Gauge	Measures	Values	Record
CHATTAHOOCHEE RIVER AT 14TH ST, AT COLUMBUS, GA	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	205	1929–2026
CHATTAHOOCHEE RIVER AT COLUMBUS, GA	catchment area, annual maximum river flow	78	1841–2026
CHATTAHOOCHEE RIVER AT US 280, NEAR COLUMBUS, GA	catchment area, annual maximum river flow	14	2002–2026

How these gauges were attached to this water

Assigned by the publisher to a numbered basin Every gauge here is assigned to this drainage area by its own publisher, which issues the area an official code — 03130003. A drainage area is not a river: it contains the tributaries as well as the main channel, and a gauge in it may be on any of them.

What each gauge’s link to this water rests on
Gauge	Evidence	Established
CHATTAHOOCHEE RIVER AT 14TH ST, AT COLUMBUS, GA	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
CHATTAHOOCHEE RIVER AT COLUMBUS, GA	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02
CHATTAHOOCHEE RIVER AT US 280, NEAR COLUMBUS, GA	Stated by the publisher — USGS site service, huc_cd field — https://waterservices.usgs.gov/nwis/site/ ; named from the USGS Watershed Boundary Dataset 8-digit HU (Subbasin) layer — https://hydro.nationalmap.gov/arcgis/rest/services/wbd/MapServer/4	2026-10-02

What this record holds

Hydrionis decides which waters get a page, and which of those are offered to search, from what is actually held rather than from how the page reads. Five signals are counted; this record has 2 of them, which makes it a profile, not indexed.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	2	no
Years spanned	186	yes, 20 or more
Values held	297	no
Distinct measurements	4	yes, 2 or more
Publishers measuring it	1	no
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-02341460.json
How to cite this, and who you must credit
How these figures were produced
Request this at a different scale, format or geography

No bulk download is offered here, which is a licence position rather than a product one: at least one contributing publisher does not permit redistribution. The values can be read on the page, cited, and pointed to at source.

Attribution and citation

Suggested citation for Hydrionis

Hydrionis (2026), Middle Chattahoochee-Walter F gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-middle-chattahoochee-walter-f/

Cite Hydrionis where you rely on values Hydrionis computed, on the method that produced them, or on the compilation itself. The underlying measurements remain the publishers’ and their attribution requirements apply to you directly.

Recommended, not required. Hydrionis does not claim rights over unmodified public data it relayed, and doing arithmetic on somebody else’s measurements does not make them Hydrionis’s. Cite the version and the access date: the Middle Chattahoochee-Walter F gauge records changes as publishers release and as methods are revised, and a citation without both cannot be checked later. Full guidance is on cite and reuse.

None of the contributing licences requires attribution. Crediting the publishers is still good practice and they are listed above.

Where these figures come from

MeasuredHigh confidence2025-02-16

Source: USGS — National Water Information System, USGS site 02341460, annual peak streamflow. Licence: Open.

Method: The instantaneous maximum discharge of each water year as published by USGS, dated to the day it occurred. One value per October-to-September water year; where the publisher lists both a systematic and a historic peak for a year, the larger is the annual maximum. Values the publisher marks as maximum daily averages are not held here, because they are not instantaneous peaks. Values marked as bounded rather than measured are held as censored observations carrying the bound. Cubic feet per second are converted to cubic metres per second and the publisher unit is recorded alongside.

Rating curves are extrapolated at extreme discharges, so the largest values in a peak series carry the largest measurement uncertainty. Data from the U.S. Geological Survey National Water Information System, a work of the United States government and therefore in the public domain.

Retrieved 1 October 2026.