The monitoring network within this area

Hydrionis holds 1,296 values from 5 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

1,296

Values held

1903–2026

Record spans

Gauges within the Lake Dubay huc8 subbasin

5 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 WISCONSIN RIVER AT MERRILL, WI

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1903–2025.

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	WISCONSIN RIVER AT MERRILL, WI (m³/s)
1903	617
1904	552
1905	651
1906	459
1907	368
1908	396
1909	328
1911	230
1912	1,274
1913	357
1914	311
1915	231
1916	663
1917	303
1918	379
1919	365
1920	580
1921	436
1922	521
1923	586
1924	377
1925	209
1926	493
1927	493
1928	501
1929	620
1930	303
1931	239
1932	311
1933	311
1934	286
1935	481
1936	408
1937	326
1938	493
1939	470
1940	467
1941	1,399
1942	765
1943	422
1944	331
1945	236
1946	513
1947	239
1948	156
1949	225
1950	513
1951	493
1952	413
1953	345
1954	382
1955	300
1956	244
1957	146
1958	206
1959	555
1960	481
1961	303
1962	351
1963	219
1964	185
1965	348
1966	343
1967	674
1968	442
1969	425
1970	150
1971	521
1972	462
1973	623
1974	259
1975	428
1976	538
1977	171
1978	267
1979	566
1980	600
1981	549
1982	473
1983	487
1985	396
1986	620
1988	211
1989	231
1990	521
1991	498
1993	583
1994	558
1995	340
1996	663
1997	603
1998	382
1999	267
2000	314
2001	507
2002	586
2003	504
2004	283
2005	261
2006	331
2007	220
2008	402
2009	212
2010	535
2011	623
2012	225
2013	343
2014	365
2015	236
2016	484
2017	535
2018	402
2019	547
2020	394
2021	261
2022	518
2023	643
2024	345
2025	331

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	1903–2025
Completeness	96.7% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	4 separate periods inside 1903–2025 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1903 and is not continuous from it: 123 years separate the first value from the last, and 97% 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 WISCONSIN RIVER AT MERRILL, WI, 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	WISCONSIN RIVER AT MERRILL, WI (mm)
1913	417
1914	360
1915	341
1916	475
1917	314
1918	318
1919	370
1920	336
1921	292
1922	311
1923	287
1924	292
1925	195
1926	375
1927	368
1928	445
1929	418
1930	242
1931	231
1932	254
1933	222
1934	267
1935	369
1936	305
1937	265
1938	459
1939	418
1940	332
1941	414
1942	426
1943	399
1944	274
1945	315
1946	351
1947	275
1948	173
1949	222
1950	309
1951	466
1952	366
1953	329
1954	331
1955	293
1956	280
1957	212
1958	235
1959	343
1960	415
1961	310
1962	300
1963	206
1964	195
1965	346
1966	305
1967	373
1968	423
1969	336
1970	263
1971	348
1972	395
1973	439
1974	270
1975	302
1976	274
1977	222
1978	348
1979	387
1980	326
1981	349
1982	380
1983	396
1984	311
1985	435
1986	412
1987	182
1988	196
1989	184
1992	334
1993	365
1994	296
1995	329
1996	412
1997	384
1998	228
1999	255
2000	258
2001	289
2002	419
2003	291
2004	284
2005	217
2006	215
2007	200
2008	224
2009	162
2010	270
2011	321
2012	194
2013	318
2014	447
2015	327
2016	422
2017	507
2018	396
2019	503
2020	469
2021	312
2022	339
2023	340
2024	290
2025	304

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	98.2% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	One period inside 1913–2025 holds no value: 1990 to 1991, 2 years with no reading. It is drawn as a break in the line and is 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 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 Lake Dubay and what each holds
Gauge	Measures	Values	Record
WISCONSIN RIVER AT MERRILL, WI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	347	1903–2026
PRAIRIE RIVER NEAR MERRILL, WI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	310	1914–2026
BIG EAU PLEINE RIVER AT STRATFORD, WI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	298	1914–2026
EAU CLAIRE RIVER AT KELLY, WI	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	291	1914–2026
BIG RIB RIVER AT RIB FALLS, WI	catchment area, annual maximum river flow	50	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 — 07070002. 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
WISCONSIN RIVER AT MERRILL, WI	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
PRAIRIE RIVER NEAR MERRILL, WI	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
BIG EAU PLEINE RIVER AT STRATFORD, WI	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
EAU CLAIRE RIVER AT KELLY, WI	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
BIG RIB RIVER AT RIB FALLS, WI	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	5	yes, 3 or more
Years spanned	124	yes, 20 or more
Values held	1,296	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-05395000.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), Lake Dubay gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-lake-dubay/

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 Lake Dubay 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 confidence2025-04-29

Source: USGS — National Water Information System, USGS site 05395000, 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.