The monitoring network within this area

Hydrionis holds 408 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

408

Values held

1895–2026

Record spans

Gauges within the Upper Marais Des Cygnes 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 MARAIS DES CYGNES R NR OTTAWA, KS

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1895–2025.

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	MARAIS DES CYGNES R NR OTTAWA, KS (m³/s)
1895	459
1897	385
1898	589
1902	206
1903	379
1904	1,608
1905	464
1909	1,914
1912	236
1913	256
1915	881
1919	269
1920	328
1921	340
1922	773
1923	504
1925	151
1926	105
1927	552
1928	2,475
1930	102
1931	47.9
1933	199
1934	203
1935	1,223
1937	240
1938	501
1939	75.9
1940	183
1941	320
1943	391
1944	2,067
1945	1,985
1946	354
1947	532
1948	433
1949	371
1950	419
1951	4,021
1952	340
1953	76.2
1954	160
1955	148
1957	317
1958	259
1960	345
1961	759
1963	126
1964	153
1965	498
1966	112
1967	530
1968	232
1969	688
1970	331
1971	219
1972	405
1973	439
1975	464
1976	162
1977	413
1979	184
1980	442
1981	711
1982	345
1983	379
1984	521
1985	405
1987	388
1988	289
1989	78.4
1990	476
1991	59.2
1992	225
1993	484
1994	439
1995	501
1996	450
1997	343
1998	228
1999	130
2001	184
2002	195
2003	223
2004	340
2005	521
2006	191
2007	1,546
2008	365
2009	394
2010	374
2011	249
2012	98.8
2013	63.4
2014	123
2015	476
2016	544
2017	425
2019	561
2020	225
2021	515
2022	182
2023	213
2024	264
2025	408

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	1895–2025
Completeness	80.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	19 separate periods inside 1895–2025 hold no value. The longest runs from 1899 to 1901 — 3 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1895 and is not continuous from it: 131 years separate the first value from the last, and 80% 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 MARAIS DES CYGNES R NR OTTAWA, 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	MARAIS DES CYGNES R NR OTTAWA, KS (mm)
1903	335
1904	461
1919	88.0
1920	71.0
1921	127
1922	171
1923	108
1924	39.0
1925	34.0
1926	74.0
1927	282
1928	275
1929	194
1930	37.0
1931	88.0
1932	105
1933	32.0
1934	30.0
1935	244
1936	17.0
1937	67.0
1938	137
1939	12.0
1940	32.0
1941	385
1942	217
1943	210
1944	415
1945	482
1946	184
1947	249
1948	147
1949	233
1950	212
1951	613
1952	113
1953	10.0
1954	22.0
1955	21.0
1956	5.00
1957	135
1958	230
1959	101
1960	140
1961	480
1962	213
1963	39.0
1964	39.0
1965	227
1966	37.0
1967	192
1968	188
1969	355
1970	197
1971	122
1972	108
1973	576
1974	197
1975	215
1976	33.0
1977	251
1978	161
1979	132
1980	101
1981	201
1982	324
1983	334
1984	295
1985	508
1986	305
1987	293
1988	76.0
1989	42.0
1990	239
1991	22.0
1992	231
1993	529
1994	121
1995	291
1996	196
1997	187
1998	462
1999	345
2000	67.0
2001	126
2002	92.0
2003	66.0
2004	210
2005	364
2006	57.0
2007	368
2008	304
2009	353
2010	335
2011	100
2012	38.0
2013	33.0
2014	41.0
2015	246
2016	245
2017	168
2018	111
2019	653
2020	213
2021	354
2022	182
2023	78.0
2024	229
2025	142

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	88.6% 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: 1905 to 1918, 14 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 89% 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 Marais Des Cygnes and what each holds
Gauge	Measures	Values	Record
MARAIS DES CYGNES R NR OTTAWA, KS	catchment area, annual maximum river flow, mean river flow	228	1895–2026
MARAIS DES CYGNES R NR POMONA, KS	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	180	1923–2026

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 — 10290101. 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
MARAIS DES CYGNES R NR OTTAWA, 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	2026-08-26
MARAIS DES CYGNES R NR POMONA, 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	2026-08-26

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	132	yes, 20 or more
Values held	408	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-06913500.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 Marais Des Cygnes gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-upper-marais-des-cygnes/

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 Marais Des Cygnes 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 confidence2025-06-04

Source: USGS — National Water Information System, USGS site 06913500, 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.