The monitoring network within this area

Hydrionis holds 596 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

596

Values held

1902–2026

Record spans

Gauges within the Middle Arkansas-Lake McKinney 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 R AT SYRACUSE, KS

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1903–2025.

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	ARKANSAS R AT SYRACUSE, KS (m³/s)
1903	1,161
1904	957
1906	272
1908	2,464
1921	1,756
1922	19.8
1923	493
1925	436
1926	45.3
1927	354
1928	294
1929	1,048
1930	114
1932	351
1933	396
1934	385
1935	518
1936	549
1937	490
1938	453
1939	32.8
1940	63.1
1941	215
1942	1,005
1944	150
1945	49.8
1946	53.5
1947	141
1948	68.0
1949	1,076
1950	125
1951	1,538
1952	99.4
1953	89.5
1954	232
1955	253
1956	218
1957	391
1958	148
1959	121
1960	30.9
1961	135
1962	135
1963	173
1964	351
1965	4,927
1966	82.1
1967	103
1968	29.7
1969	124
1970	68.2
1971	42.2
1972	108
1973	129
1974	15.1
1975	90.9
1976	61.2
1977	37.1
1978	75.6
1979	11.8
1980	19.3
1981	13.3
1982	17.5
1983	25.7
1984	75.3
1985	48.1
1986	51.5
1987	94.3
1988	53.0
1989	28.1
1990	12.1
1991	14.3
1992	46.7
1993	15.5
1994	24.1
1995	62.6
1996	89.5
1997	61.2
1998	58.3
1999	81.0
2000	31.1
2001	28.9
2002	27.1
2003	6.34
2004	24.5
2005	17.4
2006	15.9
2007	18.3
2008	15.1
2009	17.4
2010	20.9
2011	11.2
2012	2.89
2013	8.83
2014	28.3
2015	50.1
2016	39.1
2017	25.7
2018	39.6
2019	18.2
2020	16.3
2021	14.0
2022	6.60
2023	23.8
2024	10.4
2025	9.46

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	1903–2025
Completeness	86.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	6 separate periods inside 1903–2025 hold no value. The longest runs from 1909 to 1920 — 12 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1903 and is not continuous from it: 123 years separate the first value from the last, and 86% 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 ARKANSAS R AT SYRACUSE, KS, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1903–2025.

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	ARKANSAS R AT SYRACUSE, KS (mm)
1903	7.00
1904	12.0
1905	18.0
1923	17.0
1924	6.00
1925	6.00
1926	2.00
1927	7.00
1928	6.00
1929	5.00
1930	4.00
1931	2.00
1932	1.00
1933	3.00
1934	1.00
1935	5.00
1936	7.00
1937	2.00
1938	4.00
1939	1.00
1940	1.00
1941	8.00
1942	27.0
1943	3.00
1944	6.00
1945	3.00
1946	3.00
1947	8.00
1948	4.00
1949	6.00
1950	4.00
1951	7.00
1952	2.00
1953	2.00
1954	2.00
1955	3.00
1956	2.00
1957	4.00
1958	3.00
1959	4.00
1960	2.00
1961	2.00
1962	2.00
1963	1.00
1964	1.00
1965	15.0
1966	5.00
1967	4.00
1968	2.00
1969	3.00
1970	3.00
1971	2.00
1972	2.00
1973	2.00
1974	1.00
1975	1.00
1976	0
1977	0
1978	1.00
1979	0
1980	2.00
1981	1.00
1982	1.00
1983	3.00
1984	4.00
1985	5.00
1986	5.00
1987	10.0
1988	4.00
1989	2.00
1990	2.00
1991	1.00
1992	1.00
1993	2.00
1994	2.00
1995	6.00
1996	5.00
1997	6.00
1998	8.00
1999	10.0
2000	5.00
2001	3.00
2002	1.00
2003	0
2004	1.00
2005	2.00
2006	1.00
2007	2.00
2008	2.00
2009	2.00
2010	2.00
2011	1.00
2012	0
2013	0
2014	1.00
2015	3.00
2016	3.00
2017	3.00
2018	3.00
2019	3.00
2020	1.00
2021	1.00
2022	0
2023	2.00
2024	1.00
2025	1.00

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	1903–2025
Completeness	86.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1903–2025 holds no value: 1906 to 1922, 17 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1903 and is not continuous from it: 123 years separate the first value from the last, and 86% of the years between them are held. The span is not the record.
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 Arkansas-Lake McKinney and what each holds
Gauge	Measures	Values	Record
ARKANSAS R AT SYRACUSE, KS	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	323	1902–2026
ARKANSAS R AT GARDEN CITY, KS	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	273	1922–2026

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 — 11030001. 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 R AT SYRACUSE, KS	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
ARKANSAS R AT GARDEN CITY, KS	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	125	yes, 20 or more
Values held	596	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-07138000.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 Arkansas-Lake McKinney gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-middle-arkansas-lake-mckinney/

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 Arkansas-Lake McKinney 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 confidence2025-04-26

Source: USGS — National Water Information System, USGS site 07138000, 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.