The monitoring network within this area

Hydrionis holds 1,455 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.

2

Gauges

1,455

Values held

1916–2026

Record spans

Gauges within the Little Wood 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 LITTLE WOOD RIVER NR CAREY ID

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1927–2024.

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	LITTLE WOOD RIVER NR CAREY ID (m³/s)
1927	33.4
1928	16.3
1929	8.18
1930	12.9
1931	5.58
1932	27.4
1933	15.6
1934	4.53
1935	19.8
1936	25.3
1937	19.3
1938	170
1939	22.7
1940	17.0
1941	13.3
1942	22.0
1943	48.7
1944	18.7
1945	17.6
1946	30.0
1947	21.7
1948	17.3
1949	18.7
1950	48.7
1951	30.9
1952	75.9
1953	19.4
1954	20.7
1955	12.3
1956	30.3
1957	46.2
1958	56.6
1959	12.0
1960	14.5
1961	8.16
1962	23.1
1963	34.5
1964	15.7
1966	26.2
1967	34.5
1968	15.6
1969	42.5
1970	18.5
1971	38.5
1972	20.8
1973	17.3
1974	36.0
1975	28.9
1976	19.5
1977	7.65
1978	24.6
1979	12.3
1980	31.7
1981	22.0
1982	566
1983	69.9
1984	35.7
1985	27.3
1986	34.5
1987	21.8
1988	9.80
1989	17.6
1990	9.09
1993	24.9
1994	9.71
1996	22.5
1997	29.2
1998	30.3
1999	22.5
2000	14.3
2001	9.20
2010	25.4
2011	23.6
2012	21.2
2013	8.98
2014	12.7
2015	9.85
2016	13.7
2017	37.1
2018	53.0
2019	32.0
2020	11.1
2021	7.62
2022	10.7
2023	34.3
2024	23.5

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	1927–2024
Completeness	87.8% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	4 separate periods inside 1927–2024 hold no value. The longest runs from 2002 to 2009 — 8 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1927 and is not continuous from it: 98 years separate the first value from the last, and 88% 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 LITTLE WOOD RIVER NR CAREY ID, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1927–2024.

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	LITTLE WOOD RIVER NR CAREY ID (mm)
1927	232
1928	120
1929	71.0
1930	110
1931	44.0
1932	174
1933	99.0
1934	47.0
1935	128
1936	120
1937	91.0
1938	329
1939	90.0
1940	131
1941	130
1944	153
1945	146
1946	178
1947	168
1948	132
1949	122
1950	186
1951	187
1952	317
1953	165
1954	116
1955	101
1956	241
1957	189
1958	240
1959	89.0
1960	98.0
1961	73.0
1962	166
1963	163
1964	177
1965	372
1966	150
1967	257
1968	135
1969	373
1970	173
1971	316
1972	175
1973	146
1974	254
1975	230
1976	149
1977	56.0
1978	205
1979	112
1980	225
1981	150
1982	305
1983	429
1984	277
1985	145
1986	303
1987	89.0
1988	75.0
1989	127
1990	91.0
1991	88.0
1992	72.0
1993	193
1994	81.0
1995	308
1996	178
1997	342
1998	235
1999	230
2000	117
2001	76.0
2002	78.0
2003	111
2004	91.0
2005	168
2006	292
2007	88.0
2008	108
2009	134
2010	126
2011	198
2012	163
2013	87.0
2014	70.0
2015	72.0
2016	112
2017	424
2019	288
2020	93.0
2021	61.0
2022	94.0
2023	238
2024	138

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	Derived Computed by Hydrionis
Period held	1927–2024
Completeness	96.9% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1927–2024 hold no value. The longest runs from 1942 to 1943 — 2 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1927 and is not continuous from it: 98 years separate the first value from the last, and 97% 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

The snow standing above this water

2 automated snow stations sit inside this drainage area, weighing the snowpack rather than measuring how deep it is.

491

Fullest snowpack recorded at Garfield R.S., in 1983 (mm of water)

107

Thinnest, in 2014 (mm of water)

March

Month the pack is usually at its fullest

May

Month the pack has gone by, in half of years

Peak snowpack at Garfield R.S.

Water years 1981–2026. Each point is the fullest month of that snow season.

A water year runs October to September and is named for the year it ends, so the snow of one winter stays in one point. The value is the fullest month, not the fullest day: a pack that peaked sharply mid-month reads lower here than a single measurement taken at the right moment would.

View the data behind this chart

Underlying data
Period	Garfield R.S. (mm)
1981	199
1982	380
1983	491
1984	279
1985	243
1986	384
1987	111
1988	129
1989	258
1990	169
1991	111
1992	133
1993	277
1994	150
1995	296
1996	262
1997	344
1998	248
1999	326
2000	214
2001	123
2002	204
2003	228
2004	236
2005	183
2006	330
2007	146
2008	265
2009	232
2010	159
2011	265
2012	186
2013	166
2014	107
2015	131
2016	233
2017	422
2018	161
2019	406
2020	151
2021	168
2022	189
2023	370
2024	248
2025	212
2026	125

Read against the river

Garfield R.S. and LITTLE WOOD RIVER NR CAREY ID both sit in this drainage area, and their records overlap by 43 years. That is the span the two have in common, not a count of years both actually hold — either record may have gaps inside it. The two are shown separately rather than on one axis: millimetres of stored water and cubic metres per second are not commensurable, and a difference between them would mean nothing.

Being in the same drainage area does not put the snowpack upstream of the gauge. A subbasin is an area, and snow on one tributary can join the river below a gauge on another — so a weak relationship here may say more about which tributary was measured than about the snow.

Every gauge Hydrionis holds within this area

Gauges within the Little Wood and what each holds
Gauge	Measures	Values	Record
LITTLE WOOD RIVER NR CAREY ID	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	315	1926–2026
LITTLE WOOD RIVER NR RICHFIELD ID	catchment area, annual maximum river flow	48	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 — 17040221. 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
LITTLE WOOD RIVER NR CAREY ID	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
LITTLE WOOD RIVER NR RICHFIELD ID	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 4 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	111	yes, 20 or more
Values held	1,455	yes, 1000 or more
Distinct measurements	6	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-13148500.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), Little Wood gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-little-wood/

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 Little Wood 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 confidence2024-04-04

Source: USGS — National Water Information System, USGS site 13148500, 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.