The monitoring network within this area

Hydrionis holds 524 values from 2 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

524

Values held

1896–2026

Record spans

Gauges within the Greenbrier huc8 subbasin

2 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 GREENBRIER RIVER AT ALDERSON, WV

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1896–2025.

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

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 (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	GREENBRIER RIVER AT ALDERSON, WV (m³/s)
1896	816
1897	1,529
1898	1,487
1899	1,385
1902	1,240
1903	1,385
1904	728
1905	1,065
1906	736
1907	1,487
1908	1,487
1909	566
1910	1,300
1911	1,240
1912	1,005
1913	1,812
1914	464
1915	1,155
1917	1,218
1918	2,195
1919	1,388
1920	326
1922	629
1923	552
1924	1,025
1925	428
1926	586
1928	510
1929	926
1931	411
1932	1,297
1933	748
1934	915
1935	1,286
1936	1,504
1937	971
1939	1,093
1940	847
1941	326
1942	1,000
1943	963
1944	714
1945	538
1946	1,130
1947	691
1948	1,141
1950	892
1951	830
1952	782
1953	1,334
1954	841
1955	1,257
1956	515
1957	818
1958	756
1959	677
1960	1,005
1961	889
1962	1,005
1963	1,410
1964	1,121
1965	804
1966	748
1967	1,716
1968	779
1969	1,263
1971	793
1972	1,337
1973	742
1975	725
1976	898
1977	1,696
1978	1,331
1979	932
1980	799
1981	835
1982	991
1984	1,096
1985	586
1987	957
1988	733
1989	1,090
1990	912
1991	997
1992	762
1993	1,025
1994	1,260
1995	1,130
1996	2,662
1998	917
1999	532
2000	923
2001	850
2002	895
2003	1,305
2005	671
2006	685
2007	1,280
2008	1,014
2009	566
2010	1,526
2011	841
2012	844
2013	1,136
2014	858
2015	1,031
2016	2,285
2017	988
2018	1,257
2019	699
2020	776
2021	1,489
2022	872
2023	1,113
2024	739
2025	1,192

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	1896–2025
Completeness	89.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	13 separate periods inside 1896–2025 hold no value. The longest runs from 1900 to 1901 — 2 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1896 and is not continuous from it: 130 years separate the first value from the last, and 89% of the years between them are held. The span is not the record.
Last read from the publisher	2026-08-31
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 GREENBRIER RIVER AT ALDERSON, WV, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1896–2025.

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	GREENBRIER RIVER AT ALDERSON, WV (mm)
1896	488
1897	517
1898	641
1899	509
1900	448
1901	631
1902	499
1903	526
1904	328
1905	479
1906	691
1907	785
1908	722
1909	510
1910	452
1911	644
1912	518
1913	642
1914	501
1915	499
1916	486
1917	535
1918	832
1919	711
1920	559
1921	415
1922	571
1923	480
1924	629
1925	390
1926	595
1927	596
1928	526
1929	628
1930	178
1931	327
1932	552
1933	486
1934	397
1935	697
1936	601
1937	560
1938	393
1939	445
1940	501
1941	251
1942	529
1943	434
1944	436
1945	470
1946	378
1947	368
1948	669
1949	587
1950	561
1951	534
1952	470
1953	411
1954	528
1955	441
1956	500
1957	552
1958	533
1959	455
1960	428
1961	658
1962	446
1963	428
1964	421
1965	414
1966	412
1967	618
1968	398
1969	362
1970	433
1971	535
1972	865
1973	667
1974	550
1975	648
1976	449
1977	437
1978	504
1979	758
1980	473
1981	401
1982	637
1983	552
1984	720
1985	544
1986	392
1987	522
1988	260
1989	665
1990	579
1991	502
1992	458
1993	503
1994	619
1995	454
1996	879
1997	402
1998	568
1999	318
2000	416
2001	377
2002	549
2003	956
2004	668
2005	435
2006	432
2007	481
2008	457
2009	564
2010	448
2011	543
2012	401
2013	589
2014	432
2015	628
2016	574
2017	466
2018	871
2019	509
2020	715
2021	422
2022	500
2023	363
2024	406
2025	504

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	1896–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1896 to 2025 is held.
Last read from the publisher	2026-08-24
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 Greenbrier and what each holds
Gauge	Measures	Values	Record
GREENBRIER RIVER AT ALDERSON, WV	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	295	1896–2026
GREENBRIER RIVER AT BUCKEYE, WV	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	229	1929–2026

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 — 05050003. 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
GREENBRIER RIVER AT ALDERSON, WV	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	2026-08-26
GREENBRIER RIVER AT BUCKEYE, WV	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	2026-08-26

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 3 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	2	no
Years spanned	131	yes, 20 or more
Values held	524	no
Distinct measurements	4	yes, 2 or more
Publishers measuring it	2	yes, 2 or more
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-03183500.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), Greenbrier gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-greenbrier/

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 Greenbrier 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 confidence2025-02-07

Source: USGS — National Water Information System, USGS site 03183500, 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 31 August 2026.