The monitoring network within this area

Hydrionis holds 459 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

459

Values held

1911–2026

Record spans

Gauges within the Upper Gila-Mangas 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 GILA RIVER NEAR CLIFTON, AZ

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1911–2025.

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	GILA RIVER NEAR CLIFTON, AZ (m³/s)
1911	453
1912	595
1913	34.0
1914	161
1916	215
1928	81.3
1929	374
1930	178
1931	195
1932	127
1933	113
1934	481
1935	87.8
1936	122
1937	211
1938	168
1939	246
1941	799
1942	92.9
1943	192
1944	73.9
1945	129
1948	30.9
1949	394
1950	47.6
1951	130
1952	121
1953	105
1954	170
1955	268
1957	229
1958	113
1959	159
1960	113
1961	68.0
1962	254
1963	101
1964	144
1965	93.7
1967	314
1968	124
1969	102
1970	119
1972	174
1974	98.0
1975	132
1976	67.7
1977	79.9
1978	238
1980	241
1981	232
1983	141
1984	1,382
1985	178
1987	85.5
1988	190
1989	17.6
1991	276
1993	1,005
1994	19.8
1995	702
1996	135
1997	479
1998	94.3
1999	95.4
2000	22.2
2002	114
2004	83.5
2005	869
2006	228
2008	267
2009	25.3
2010	182
2011	27.9
2012	77.0
2013	239
2014	292
2015	94.6
2016	98.0
2018	167
2020	55.8
2021	56.1
2022	521
2024	15.5
2025	48.1

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	1911–2025
Completeness	73.9% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	19 separate periods inside 1911–2025 hold no value. The longest runs from 1917 to 1927 — 11 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1911 and is not continuous from it: 115 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 GILA RIVER NEAR CLIFTON, AZ, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1911–2025.

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	GILA RIVER NEAR CLIFTON, AZ (mm)
1911	21.0
1912	23.0
1913	15.0
1914	46.0
1915	57.0
1916	50.0
1917	20.0
1929	14.0
1930	15.0
1931	19.0
1932	19.0
1936	9.00
1937	21.0
1938	9.00
1939	10.0
1940	16.0
1941	48.0
1942	12.0
1943	8.00
1944	9.00
1945	12.0
1946	6.00
1949	32.0
1950	5.00
1951	4.00
1952	12.0
1953	4.00
1954	9.00
1955	10.0
1956	2.00
1957	11.0
1958	22.0
1959	8.00
1960	13.0
1961	6.00
1962	21.0
1963	13.0
1964	6.00
1965	16.0
1966	23.0
1967	13.0
1968	33.0
1969	6.00
1970	5.00
1971	9.00
1972	29.0
1973	35.0
1974	7.00
1975	20.0
1976	8.00
1977	6.00
1978	35.0
1979	35.0
1980	14.0
1981	8.00
1982	13.0
1983	42.0
1984	24.0
1985	41.0
1986	18.0
1987	14.0
1988	26.0
1996	14.0
1997	23.0
1998	22.0
1999	11.0
2000	13.0
2001	8.00
2002	6.00
2003	5.00
2004	13.0
2005	35.0
2006	28.0
2007	14.0
2008	17.0
2009	6.00
2010	25.0
2011	5.00
2012	6.00
2013	18.0
2014	13.0
2015	18.0
2016	15.0
2017	25.0
2018	7.00
2019	14.0
2020	14.0
2021	6.00
2022	31.0
2023	19.0
2024	7.00
2025	3.00

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	1911–2025
Completeness	80.0% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	4 separate periods inside 1911–2025 hold no value. The longest runs from 1918 to 1928 — 11 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1911 and is not continuous from it: 115 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	2026-08-24
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 Gila-Mangas and what each holds
Gauge	Measures	Values	Record
GILA RIVER NEAR CLIFTON, AZ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	233	1911–2026
GILA RIVER BELOW BLUE CREEK, NEAR VIRDEN, NM	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	226	1927–2026

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 — 15040002. 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
GILA RIVER NEAR CLIFTON, AZ	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
GILA RIVER BELOW BLUE CREEK, NEAR VIRDEN, NM	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	116	yes, 20 or more
Values held	459	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-09442000.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 Gila-Mangas gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-upper-gila-mangas/

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 Gila-Mangas 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 confidence2025-09-26

Source: USGS — National Water Information System, USGS site 09442000, 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.