The monitoring network within this area

Hydrionis holds 457 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

457

Values held

1905–2026

Record spans

Gauges within the Upper Klamath 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 KLAMATH RIVER AT KENO, OR

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1905–2025.

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	KLAMATH RIVER AT KENO, OR (m³/s)
1905	93.4
1906	112
1907	148
1908	116
1909	97.7
1910	119
1911	104
1912	81.3
1913	104
1930	48.1
1932	69.7
1933	67.4
1934	76.5
1935	127
1936	78.4
1937	75.6
1938	193
1939	65.4
1940	185
1941	103
1942	104
1943	182
1945	64.6
1946	125
1948	76.5
1949	76.2
1950	78.2
1951	133
1952	187
1953	180
1954	165
1956	202
1957	204
1958	212
1960	71.1
1961	81.6
1962	94.9
1963	155
1964	96.6
1965	240
1967	172
1969	223
1970	253
1971	242
1972	286
1974	263
1975	176
1976	120
1978	174
1979	85.8
1980	150
1981	85.5
1982	289
1983	258
1985	191
1986	292
1987	74.2
1988	71.4
1989	224
1990	78.4
1991	24.1
1993	253
1995	223
1996	270
1997	279
1998	221
1999	250
2000	119
2001	52.7
2002	68.8
2003	110
2004	69.4
2005	157
2006	253
2007	89.2
2008	69.4
2009	63.4
2011	119
2012	98.3
2014	46.4
2016	279
2017	221
2018	182
2019	238
2020	173
2021	31.7
2022	133
2023	161
2024	57.5
2025	259

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	1905–2025
Completeness	74.4% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	16 separate periods inside 1905–2025 hold no value. The longest runs from 1914 to 1929 — 16 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1905 and is not continuous from it: 121 years separate the first value from the last, and 74% 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 KLAMATH RIVER AT KENO, OR, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1905–2025.

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	KLAMATH RIVER AT KENO, OR (mm)
1905	180
1906	205
1907	237
1908	159
1909	182
1910	193
1911	180
1912	168
1913	184
1930	84.0
1931	36.0
1932	64.0
1933	62.0
1934	61.0
1935	93.0
1936	115
1937	72.0
1938	182
1939	91.0
1940	125
1941	97.0
1942	124
1943	225
1944	111
1945	101
1946	152
1947	80.0
1948	110
1949	115
1950	114
1951	162
1952	245
1953	237
1954	216
1955	110
1956	338
1957	216
1958	289
1959	126
1960	99.0
1961	115
1962	121
1963	145
1964	123
1965	258
1966	99.0
1967	141
1968	80.0
1969	153
1970	167
1971	221
1972	204
1973	114
1974	204
1975	188
1976	121
1977	78.0
1978	146
1979	87.0
1980	112
1981	82.0
1982	227
1983	268
1984	245
1985	131
1986	178
1987	94.0
1988	80.0
1989	142
1990	85.0
1991	41.0
1992	31.0
1993	138
1994	42.0
1995	107
1996	198
1997	178
1998	224
1999	201
2000	131
2001	85.0
2002	75.0
2003	90.0
2004	66.0
2005	85.0
2006	198
2007	94.0
2008	97.0
2009	80.0
2010	73.0
2011	124
2012	91.0
2013	64.0
2014	64.0
2015	63.0
2016	84.0
2017	139
2018	78.0
2019	94.0
2020	73.0
2021	62.0
2022	65.0
2023	76.0
2024	62.0
2025	125

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	1905–2025
Completeness	86.8% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1905–2025 holds no value: 1914 to 1929, 16 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1905 and is not continuous from it: 121 years separate the first value from the last, and 87% 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 Klamath and what each holds
Gauge	Measures	Values	Record
KLAMATH RIVER AT KENO, OR	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	247	1905–2026
KLAMATH R NR SEIAD VALLEY CA	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	210	1913–2026

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 — 18010206. 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
KLAMATH RIVER AT KENO, OR	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
KLAMATH R NR SEIAD VALLEY CA	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	122	yes, 20 or more
Values held	457	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-11509500.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 Klamath gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-upper-klamath/

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 Klamath 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 confidence2025-02-27

Source: USGS — National Water Information System, USGS site 11509500, 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.