The monitoring network within this area

Hydrionis holds 332 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

332

Values held

1924–2026

Record spans

Gauges within the Middle Brazos-Palo Pinto 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 Brazos Rv nr Palo Pinto, TX

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1924–2025.

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	Brazos Rv nr Palo Pinto, TX (m³/s)
1924	484
1925	1,328
1926	1,328
1928	801
1929	1,875
1930	2,707
1932	1,671
1933	1,107
1934	264
1935	1,337
1936	1,093
1937	742
1938	954
1939	719
1940	1,195
1941	1,090
1942	1,320
1944	162
1945	303
1946	331
1947	597
1949	334
1950	532
1951	85.5
1952	76.2
1953	109
1954	728
1955	1,467
1957	2,418
1958	892
1959	262
1960	614
1962	1,085
1963	360
1964	81.3
1965	433
1966	1,223
1967	456
1968	394
1969	980
1971	405
1972	396
1973	152
1974	680
1976	248
1977	272
1978	1,543
1979	351
1980	87.2
1981	1,962
1983	233
1985	402
1986	416
1987	85.0
1989	413
1990	1,254
1991	722
1993	88.6
1994	222
1995	382
1996	660
1997	1,096
1998	306
1999	191
2000	126
2001	402
2002	343
2004	396
2005	631
2006	97.1
2007	1,274
2008	351
2010	977
2011	105
2012	314
2014	13.1
2015	926
2016	991
2017	283
2018	281
2019	790
2020	994
2021	997
2023	297
2024	283
2025	566

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	1924–2025
Completeness	84.3% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	16 separate periods inside 1924–2025 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1924 and is not continuous from it: 102 years separate the first value from the last, and 84% 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 Brazos Rv nr Palo Pinto, TX, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1941–2025.

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	Brazos Rv nr Palo Pinto, TX (mm)
1941	95.0
1942	43.0
1943	15.0
1944	6.00
1945	12.0
1946	21.0
1947	24.0
1948	11.0
1949	21.0
1950	21.0
1951	13.0
1952	6.00
1953	9.00
1954	22.0
1955	40.0
1956	12.0
1957	108
1958	23.0
1959	16.0
1960	21.0
1961	26.0
1962	30.0
1963	16.0
1964	6.00
1965	13.0
1966	31.0
1967	12.0
1968	24.0
1969	33.0
1970	10.0
1971	11.0
1972	20.0
1973	13.0
1974	15.0
1975	17.0
1976	10.0
1977	10.0
1978	19.0
1979	9.00
1980	19.0
1981	37.0
1982	45.0
1983	8.00
1984	4.00
1985	19.0
1986	28.0
1987	34.0
1988	2.00
1989	15.0
1990	54.0
1991	49.0
1992	61.0
1993	11.0
1994	11.0
1995	13.0
1996	14.0
1997	29.0
1998	8.00
1999	5.00
2002	7.00
2003	5.00
2004	16.0
2005	19.0
2006	5.00
2007	42.0
2008	8.00
2009	3.00
2010	23.0
2011	4.00
2012	3.00
2013	2.00
2014	1.00
2015	29.0
2016	39.0
2017	8.00
2018	38.0
2019	49.0
2020	18.0
2021	30.0
2022	3.00
2023	4.00
2024	12.0
2025	25.0

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	1941–2025
Completeness	97.6% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1941–2025 holds no value: 2000 to 2001, 2 years with no reading. It is drawn as a break in the line and is never interpolated across.
Continuity	The record begins in 1941 and is not continuous from it: 85 years separate the first value from the last, and 98% 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 Brazos-Palo Pinto and what each holds
Gauge	Measures	Values	Record
Brazos Rv nr Palo Pinto, TX	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	304	1924–2026
Palo Pinto Ck nr Santo, TX	catchment area, annual maximum river flow	28	1925–2026

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 — 12060201. 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
Brazos Rv nr Palo Pinto, TX	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
Palo Pinto Ck nr Santo, TX	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 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	1	no
Years spanned	103	yes, 20 or more
Values held	332	no
Distinct measurements	5	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-08089000.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 Brazos-Palo Pinto gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-middle-brazos-palo-pinto/

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 Brazos-Palo Pinto 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 confidence2025-04-21

Source: USGS — National Water Information System, USGS site 08089000, 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.