The monitoring network within this area

Hydrionis holds 480 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

480

Values held

1914–2026

Record spans

Gauges within the Upper Salt 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 SALT RIVER NEAR ROOSEVELT, AZ

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1916–2022.

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	SALT RIVER NEAR ROOSEVELT, AZ (m³/s)
1916	2,832
1923	1,218
1925	255
1926	595
1927	1,133
1928	73.6
1929	425
1930	235
1931	623
1932	1,614
1933	119
1934	156
1935	430
1936	391
1937	2,492
1938	682
1939	256
1940	131
1941	3,313
1942	146
1943	467
1944	129
1945	154
1946	428
1947	175
1948	169
1949	439
1950	168
1951	782
1952	3,143
1953	122
1954	1,155
1955	245
1956	41.3
1957	190
1958	680
1959	343
1961	73.3
1962	242
1963	886
1964	103
1965	578
1967	159
1969	173
1970	490
1971	362
1972	1,982
1974	42.5
1976	453
1977	289
1978	2,532
1980	2,803
1981	72.2
1982	430
1983	498
1984	1,320
1986	377
1987	214
1988	311
1989	57.8
1990	190
1991	2,019
1992	697
1993	4,049
1994	225
1995	1,076
1996	187
1997	103
1998	180
1999	136
2000	105
2002	263
2003	583
2004	71.9
2005	1,317
2006	510
2007	388
2008	2,302
2010	2,500
2011	42.8
2012	47.6
2013	151
2014	121
2015	233
2018	36.5
2019	861
2020	575
2021	294
2022	243

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	1916–2022
Completeness	83.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	12 separate periods inside 1916–2022 hold no value. The longest runs from 1917 to 1922 — 6 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1916 and is not continuous from it: 107 years separate the first value from the last, and 83% 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 SALT RIVER NEAR ROOSEVELT, 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. 1914–2024.

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	SALT RIVER NEAR ROOSEVELT, AZ (mm)
1914	70.0
1915	158
1916	269
1917	68.0
1918	39.0
1919	141
1920	138
1921	55.0
1922	59.0
1923	80.0
1924	58.0
1925	35.0
1926	69.0
1927	86.0
1928	32.0
1929	46.0
1930	51.0
1931	75.0
1932	115
1933	49.0
1934	23.0
1935	83.0
1936	72.0
1937	96.0
1938	39.0
1939	39.0
1940	55.0
1941	199
1942	54.0
1943	57.0
1944	37.0
1945	54.0
1946	37.0
1947	31.0
1948	48.0
1949	78.0
1950	20.0
1951	28.0
1952	127
1953	25.0
1954	39.0
1955	25.0
1956	22.0
1957	42.0
1958	82.0
1959	49.0
1960	69.0
1961	21.0
1962	78.0
1963	43.0
1964	30.0
1965	124
1966	77.0
1967	36.0
1968	95.0
1969	59.0
1970	32.0
1971	48.0
1972	67.0
1973	162
1974	26.0
1975	63.0
1976	37.0
1977	22.0
1978	173
1979	160
1980	150
1981	34.0
1982	77.0
1983	177
1984	78.0
1985	127
1986	70.0
1987	73.0
1988	69.0
1989	27.0
1990	31.0
1991	114
1992	106
1993	243
1994	51.0
1995	104
1996	20.0
1997	43.0
1998	74.0
1999	27.0
2000	25.0
2001	39.0
2002	17.0
2003	50.0
2004	32.0
2005	103
2006	36.0
2007	40.0
2008	105
2009	39.0
2010	96.0
2011	18.0
2012	20.0
2013	40.0
2014	22.0
2015	36.0
2016	36.0
2017	64.0
2018	13.0
2019	80.0
2020	54.0
2021	23.0
2022	41.0
2023	103
2024	37.0

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	1914–2024
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1914 to 2024 is held.
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 Salt and what each holds
Gauge	Measures	Values	Record
SALT RIVER NEAR ROOSEVELT, AZ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	246	1914–2026
SALT RIVER NEAR CHRYSOTILE, AZ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow	234	1916–2026

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 — 15060103. 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
SALT RIVER NEAR ROOSEVELT, 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
SALT RIVER NEAR CHRYSOTILE, 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

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	113	yes, 20 or more
Values held	480	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-09498500.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 Salt gauge records, accessed 2026-09-02, hydrionis.com/waters/united-states-upper-salt/

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 Salt 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 confidence2022-08-20

Source: USGS — National Water Information System, USGS site 09498500, 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.