The monitoring network within this area

Hydrionis holds 598 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

598

Values held

1875–2026

Record spans

Gauges within the Lower Wabash 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 WABASH RIVER AT MT. CARMEL, IL

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1875–2025.

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	WABASH RIVER AT MT. CARMEL, IL (m³/s)
1875	9,061
1876	5,947
1877	2,039
1878	2,265
1885	5,239
1886	2,605
1887	3,398
1888	2,945
1889	3,115
1890	5,663
1891	3,398
1892	3,171
1893	5,154
1894	1,614
1895	708
1896	1,614
1897	7,136
1898	7,702
1899	2,549
1900	2,435
1901	2,124
1902	1,614
1903	3,511
1904	7,929
1905	1,897
1906	4,361
1907	5,154
1908	5,522
1909	2,605
1910	3,398
1911	2,605
1912	4,134
1913	12,120
1914	2,492
1915	2,379
1916	7,391
1917	3,710
1918	3,002
1919	4,644
1920	4,417
1921	3,455
1922	6,570
1923	3,625
1924	3,285
1925	2,860
1926	3,936
1927	5,437
1929	4,389
1930	7,900
1931	864
1932	4,446
1933	6,570
1934	1,229
1935	3,455
1936	3,483
1937	8,070
1938	4,587
1939	5,578
1940	2,832
1941	1,107
1942	3,058
1943	8,637
1944	4,729
1945	4,587
1946	2,608
1947	3,115
1948	4,587
1949	6,683
1950	8,155
1951	4,644
1952	3,596
1953	2,101
1954	782
1955	2,098
1956	2,591
1957	3,908
1958	5,267
1959	4,927
1960	3,030
1961	7,079
1962	3,483
1963	4,361
1964	4,276
1965	2,305
1966	1,756
1968	4,361
1969	5,578
1970	3,653
1971	3,455
1972	3,794
1973	3,256
1974	4,248
1975	3,794
1976	3,002
1977	2,186
1978	5,069
1979	4,786
1980	2,486
1981	3,455
1982	4,361
1983	4,870
1984	3,738
1985	5,578
1987	1,444
1988	2,744
1989	3,625
1990	5,635
1991	6,371
1992	2,404
1993	3,511
1995	4,219
1996	5,777
1997	4,078
1998	4,955
1999	4,984
2000	1,722
2001	2,010
2002	6,711
2003	3,313
2004	4,502
2005	7,617
2006	4,899
2007	5,069
2008	7,221
2009	3,936
2010	2,888
2011	7,646
2013	5,550
2014	4,078
2015	3,596
2016	4,984
2017	5,692
2018	5,324
2019	4,644
2020	4,389
2021	2,656
2022	3,794
2023	3,455
2024	2,642
2025	6,003

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	1875–2025
Completeness	92.7% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	6 separate periods inside 1875–2025 hold no value. The longest runs from 1879 to 1884 — 6 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1875 and is not continuous from it: 151 years separate the first value from the last, and 93% 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 WABASH RIVER AT MT. CARMEL, IL, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1928–2025.

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	WABASH RIVER AT MT. CARMEL, IL (mm)
1928	288
1929	447
1930	307
1931	144
1932	306
1933	464
1934	101
1935	268
1936	207
1937	475
1938	387
1939	349
1940	148
1941	96.0
1942	300
1943	356
1944	227
1945	418
1946	290
1947	311
1948	322
1949	464
1950	725
1951	432
1952	388
1953	211
1954	87.0
1955	270
1956	262
1957	472
1958	434
1959	359
1960	263
1961	371
1962	319
1963	199
1964	222
1965	232
1966	222
1967	312
1968	378
1969	410
1970	299
1971	246
1972	378
1973	454
1974	522
1975	417
1976	239
1977	271
1978	375
1979	520
1980	312
1981	305
1982	500
1983	389
1984	381
1985	521
1986	325
1987	186
1988	227
1989	405
1990	514
1991	380
1992	311
1993	603
1994	292
1995	280
1996	465
1997	390
1998	448
1999	323
2000	248
2001	358
2002	457
2003	416
2004	401
2005	403
2006	480
2007	397
2008	585
2009	490
2010	337
2011	578
2012	227
2013	435
2014	410
2015	458
2016	411
2017	431
2018	479
2019	569
2020	425
2021	386
2022	370
2023	252
2024	260
2025	319

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	1928–2025
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1928 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 Lower Wabash and what each holds
Gauge	Measures	Values	Record
WABASH RIVER AT MT. CARMEL, IL	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	342	1875–2026
BONPAS CREEK AT BROWNS, IL	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	256	1940–2026

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 — 05120113. 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
WABASH RIVER AT MT. CARMEL, IL	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
BONPAS CREEK AT BROWNS, IL	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	152	yes, 20 or more
Values held	598	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-03377500.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), Lower Wabash gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-lower-wabash/

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 Lower Wabash 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 confidence2025-04-13

Source: USGS — National Water Information System, USGS site 03377500, 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.