The monitoring network within this area

Hydrionis holds 485 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

485

Values held

1890–2026

Record spans

Gauges within the Upper Arkansas 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 ARKANSAS RIVER AT CANON CITY, CO.

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1890–2018.

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	ARKANSAS RIVER AT CANON CITY, CO. (m³/s)
1890	99.1
1895	84.1
1896	84.1
1898	93.4
1899	127
1900	130
1901	170
1902	65.1
1903	147
1904	102
1905	190
1906	149
1907	150
1908	106
1909	348
1910	116
1911	98.8
1912	142
1913	85.0
1914	184
1915	102
1916	114
1917	151
1918	173
1919	103
1920	133
1921	538
1922	90.0
1923	204
1924	158
1925	221
1926	183
1927	225
1928	119
1929	136
1930	281
1931	48.4
1932	109
1933	362
1934	67.4
1935	170
1936	173
1937	279
1938	136
1939	63.7
1940	110
1941	334
1942	247
1943	94.6
1944	255
1945	199
1946	97.4
1947	144
1948	140
1949	153
1950	219
1951	75.3
1952	151
1953	129
1954	86.4
1955	76.5
1956	112
1957	292
1958	143
1959	82.7
1960	134
1961	124
1962	114
1963	200
1964	123
1965	225
1966	141
1967	83.8
1968	120
1969	111
1970	166
1971	97.4
1972	90.6
1973	145
1974	70.8
1975	140
1976	93.7
1977	43.6
1978	127
1979	144
1980	206
1981	47.6
1982	82.1
1983	189
1984	173
1985	215
1986	140
1987	161
1988	72.2
1989	58.3
1990	108
1991	72.5
1992	57.5
1993	111
1994	108
1995	195
1996	123
1997	135
1998	103
1999	103
2000	88.3
2001	76.7
2002	14.0
2003	104
2004	67.4
2005	74.8
2006	73.6
2007	75.6
2008	128
2009	99.7
2010	148
2011	116
2012	23.7
2013	85.8
2014	133
2015	187
2016	115
2017	122
2018	86.4

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	1890–2018
Completeness	96.1% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1890–2018 hold no value. The longest runs from 1891 to 1894 — 4 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1890 and is not continuous from it: 129 years separate the first value from the last, and 96% 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 ARKANSAS RIVER AT CANON CITY, CO., as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1890–2016.

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	ARKANSAS RIVER AT CANON CITY, CO. (mm)
1890	97.0
1891	109
1892	99.0
1893	95.0
1894	94.0
1896	60.0
1897	79.0
1898	71.0
1899	102
1900	90.0
1901	71.0
1902	39.0
1903	75.0
1904	63.0
1905	93.0
1906	92.0
1907	105
1908	52.0
1909	101
1910	76.0
1911	98.0
1912	95.0
1913	65.0
1914	101
1915	75.0
1916	96.0
1917	94.0
1918	90.0
1919	89.0
1920	96.0
1921	101
1922	78.0
1923	99.0
1924	92.0
1925	56.0
1926	76.0
1927	84.0
1928	78.0
1929	89.0
1930	70.0
1931	41.0
1932	69.0
1933	59.0
1934	38.0
1935	72.0
1936	90.0
1937	58.0
1938	82.0
1939	58.0
1940	39.0
1941	82.0
1942	109
1943	89.0
1944	75.0
1945	71.0
1946	67.0
1947	97.0
1948	98.0
1949	100
1950	59.0
1951	71.0
1952	96.0
1953	72.0
1954	41.0
1955	51.0
1956	63.0
1957	146
1958	86.0
1959	65.0
1960	74.0
1961	77.0
1962	98.0
1963	47.0
1964	59.0
1965	126
1966	64.0
1967	62.0
1968	82.0
1969	84.0
1970	116
1971	80.0
1972	68.0
1973	88.0
1974	68.0
1975	91.0
1976	67.0
1977	28.0
1978	67.0
1979	95.0
1980	109
1981	45.0
1982	88.0
1983	115
1984	147
1985	119
1986	108
1987	99.0
1988	57.0
1989	66.0
1990	60.0
1991	65.0
1992	65.0
1993	97.0
1994	77.0
1995	143
1996	87.0
1997	112
1998	73.0
1999	90.0
2000	68.0
2001	64.0
2002	27.0
2003	51.0
2004	51.0
2005	58.0
2006	67.0
2007	84.0
2008	105
2009	88.0
2010	73.0
2011	95.0
2012	33.0
2013	47.0
2014	97.0
2015	111
2016	78.0

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	1890–2016
Completeness	99.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1890–2016 holds no value: 1895. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1890 and is not continuous from it: 127 years separate the first value from the last, and 99% of the years between them are held. The span is not the record.
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 Upper Arkansas and what each holds
Gauge	Measures	Values	Record
ARKANSAS RIVER AT CANON CITY, CO.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	287	1890–2026
ARKANSAS RIVER NEAR PUEBLO, CO.	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	198	1895–2026

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 — 11020002. 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
ARKANSAS RIVER AT CANON CITY, CO.	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
ARKANSAS RIVER NEAR PUEBLO, CO.	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	137	yes, 20 or more
Values held	485	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-07096000.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), Upper Arkansas gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-upper-arkansas/

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 Upper Arkansas 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 confidence2018-07-23

Source: USGS — National Water Information System, USGS site 07096000, 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.