The monitoring network within this area

Hydrionis holds 2,650 values from 15 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

2,650

Values held

1910–2026

Record spans

Gauges within the Kauai huc8 subbasin

15 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 EB of NF Wailua River nr Lihue, Kauai, HI

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1916–2025.

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	EB of NF Wailua River nr Lihue, Kauai, HI (m³/s)
1916	131
1918	70.2
1920	117
1921	118
1922	106
1923	123
1924	63.1
1925	72.8
1926	42.5
1927	84.7
1929	146
1930	44.2
1932	137
1933	63.1
1934	35.1
1936	51.8
1937	40.5
1939	58.3
1940	49.0
1942	45.9
1943	87.5
1944	79.0
1945	86.6
1946	63.1
1948	111
1949	103
1951	76.2
1952	90.3
1953	19.0
1954	55.5
1955	81.6
1957	84.7
1959	204
1960	103
1961	91.5
1963	185
1964	78.4
1965	172
1967	102
1968	154
1969	73.1
1971	135
1972	43.0
1974	99.4
1975	214
1976	59.2
1977	61.7
1978	27.3
1980	102
1981	20.4
1982	137
1984	12.8
1985	73.3
1987	68.8
1989	142
1990	88.1
1991	257
1992	134
1994	348
1995	217
1997	85.5
1999	51.8
2000	48.7
2002	132
2003	135
2004	71.9
2005	197
2007	149
2008	123
2009	275
2011	155
2012	96.8
2013	117
2015	117
2016	134
2017	73.3
2018	314
2019	92.9
2020	348
2021	200
2023	68.5
2024	200
2025	59.2

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	1916–2025
Completeness	75.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	27 separate periods inside 1916–2025 hold no value. 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: 110 years separate the first value from the last, and 75% 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 EB of NF Wailua River nr Lihue, Kauai, HI, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1913–2025.

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	EB of NF Wailua River nr Lihue, Kauai, HI (mm)
1913	2,194
1916	3,901
1917	2,691
1920	2,914
1921	3,978
1922	2,917
1923	3,116
1924	2,266
1925	2,265
1926	1,437
1927	4,216
1928	2,576
1929	2,426
1930	3,138
1931	2,149
1932	2,970
1933	2,464
1934	2,238
1935	2,111
1936	2,632
1937	3,161
1938	2,536
1939	2,420
1940	2,044
1941	1,846
1942	2,696
1943	2,464
1944	1,906
1945	2,138
1946	2,459
1947	2,133
1948	3,480
1949	2,746
1950	2,221
1951	3,011
1952	2,715
1953	1,398
1954	2,735
1955	3,227
1956	3,535
1957	2,912
1958	2,138
1959	2,067
1960	2,604
1961	2,669
1962	2,299
1963	2,696
1964	3,552
1965	4,067
1966	2,061
1967	4,398
1968	2,975
1969	2,138
1970	2,072
1971	3,205
1972	2,732
1973	2,415
1974	3,216
1975	2,310
1976	2,294
1977	1,917
1978	2,520
1979	2,188
1980	2,931
1981	2,663
1982	5,139
1983	1,602
1984	1,596
1985	2,006
1986	2,663
1987	3,116
1988	2,737
1989	3,658
1990	3,387
1991	2,790
1992	2,194
1993	1,857
1994	3,365
1995	2,470
1996	2,881
1997	2,868
1998	1,912
1999	2,216
2000	1,917
2001	2,011
2002	2,398
2003	2,017
2004	3,103
2005	2,453
2006	3,249
2007	1,928
2008	2,466
2009	2,746
2010	1,718
2011	2,923
2012	2,499
2013	2,321
2014	2,321
2015	2,553
2016	2,338
2017	2,172
2018	4,139
2019	2,730
2020	3,291
2021	3,155
2022	1,575
2023	2,702
2024	1,762
2025	1,647

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	1913–2025
Completeness	96.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	2 separate periods inside 1913–2025 hold no value. The longest runs from 1914 to 1915 — 2 years with no reading. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1913 and is not continuous from it: 113 years separate the first value from the last, and 96% 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 Kauai and what each holds
Gauge	Measures	Values	Record
EB of NF Wailua River nr Lihue, Kauai, HI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	330	1912–2026
Kawaikoi Stream nr Waimea, Kauai, HI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	325	1911–2026
SF Wailua River nr Lihue, Kauai, HI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	316	1912–2026
Hanapepe Riv blw Manuahi Str nr Eleele, Kauai, HI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	305	1917–2026
Waialae Str at alt 3,820 ft nr Waimea, Kauai, HI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	247	1920–2026
NF Wailua River nr alt 650 ft, Kauai, HI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	203	1914–2026
Waimea River near Waimea, Kauai, HI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	192	1910–2026
Kapahi Ditch nr Kealia, Kauai, HI	mean river flow, mean river flow, water year	166	1917–2001
Anahola Ditch abv Kaneha Res nr Kealia, Kauai, HI	mean river flow, mean river flow, water year	153	1922–2001
KOKEE DITCH NR WAIMEA,KAUAI, HI	mean river flow, mean river flow, water year	112	1926–1982
KEKAHA DITCH AT CAMP 1, NEAR WAIMEA,KAUAI,HI	mean river flow, mean river flow, water year	106	1910–1967
Hanalei River nr Hanalei, Kauai, HI	catchment area, annual maximum river flow	61	1962–2026
Huleia Str nr Lihue, Kauai, HI	catchment area, annual maximum river flow	49	1962–2026
Waimea River US of Kekaha-Waiahulu Int., Kauai, HI	catchment area, annual maximum river flow	44	1916–2026
MOHIHI STREAM AT ALT 3420 FT NR WAIMEA,KAUAI,HI	catchment area, annual maximum river flow	41	1921–2026

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 — 20070000. 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
EB of NF Wailua River nr Lihue, Kauai, HI	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
Kawaikoi Stream nr Waimea, Kauai, HI	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
SF Wailua River nr Lihue, Kauai, HI	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
Hanapepe Riv blw Manuahi Str nr Eleele, Kauai, HI	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
Waialae Str at alt 3,820 ft nr Waimea, Kauai, HI	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
NF Wailua River nr alt 650 ft, Kauai, HI	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
Waimea River near Waimea, Kauai, HI	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
Kapahi Ditch nr Kealia, Kauai, HI	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
Anahola Ditch abv Kaneha Res nr Kealia, Kauai, HI	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
KOKEE DITCH NR WAIMEA,KAUAI, HI	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
KEKAHA DITCH AT CAMP 1, NEAR WAIMEA,KAUAI,HI	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
Hanalei River nr Hanalei, Kauai, HI	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
Huleia Str nr Lihue, Kauai, HI	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
Waimea River US of Kekaha-Waiahulu Int., Kauai, HI	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
MOHIHI STREAM AT ALT 3420 FT NR WAIMEA,KAUAI,HI	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	12	yes, 3 or more
Years spanned	117	yes, 20 or more
Values held	2,650	yes, 1000 or more
Distinct measurements	4	yes, 2 or more
Publishers measuring it	1	no
Official identifiers	1	recorded, not counted

Use this data

Machine-readable JSON /api/v1/observations/by-subject/gauge-usgs-16068000.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), Kauai gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-kauai/

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 Kauai 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 confidence2025-07-20

Source: USGS — National Water Information System, USGS site 16068000, 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.