The monitoring network within this area

Hydrionis holds 2,785 values from 9 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

2,785

Values held

1897–2026

Record spans

Gauges within the Middle Delaware-Musconetcong huc8 subbasin

9 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 Delaware River at Trenton NJ

The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1897–2023.

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	Delaware River at Trenton NJ (m³/s)
1897	2,061
1899	1,960
1900	2,945
1901	2,197
1902	6,060
1903	3,794
1905	2,506
1906	3,171
1907	0
1909	0
1910	0
1911	0
1912	0
1913	4,531
1914	4,049
1915	2,407
1916	2,656
1917	2,566
1919	1,960
1920	3,426
1921	3,058
1923	2,118
1924	3,738
1925	4,361
1926	1,362
1927	3,285
1929	2,401
1930	1,342
1931	1,506
1932	1,872
1933	4,163
1934	2,265
1935	3,653
1936	6,428
1937	2,101
1938	3,540
1940	4,304
1941	1,608
1942	4,559
1943	3,370
1945	2,328
1946	2,330
1947	2,789
1948	3,568
1949	3,936
1950	2,260
1951	3,766
1952	2,701
1953	1,311
1955	9,316
1957	2,195
1959	2,401
1960	3,511
1961	2,735
1962	1,900
1963	2,472
1964	2,291
1965	1,379
1966	937
1967	1,345
1968	1,934
1969	2,353
1970	2,832
1971	1,880
1972	2,917
1973	3,823
1975	2,679
1976	3,200
1977	3,313
1978	2,534
1979	3,313
1980	2,945
1981	2,263
1982	1,555
1983	3,908
1984	4,304
1985	2,469
1986	3,964
1987	2,568
1988	1,150
1989	2,359
1990	1,838
1992	1,325
1993	3,087
1994	2,141
1995	1,396
1996	5,069
1998	1,968
1999	3,171
2000	1,767
2002	1,229
2003	2,353
2004	5,692
2005	6,853
2006	6,711
2007	3,285
2008	3,058
2010	2,149
2011	5,522
2012	1,744
2014	2,271
2015	1,175
2016	1,985
2017	1,940
2018	1,775
2019	1,875
2020	2,146
2021	4,389
2022	3,313
2023	1,974

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	1897–2023
Completeness	86.6% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	17 separate periods inside 1897–2023 hold no value. They are drawn as breaks in the line and are never interpolated across.
Continuity	The record begins in 1897 and is not continuous from it: 127 years separate the first value from the last, and 87% 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 Delaware River at Trenton NJ, as a depth

The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1913–2024.

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	Delaware River at Trenton NJ (mm)
1913	621
1914	497
1915	587
1916	612
1917	558
1918	518
1919	615
1920	722
1921	523
1922	501
1923	477
1924	573
1925	532
1926	556
1927	822
1928	722
1929	593
1930	387
1931	406
1932	555
1933	668
1934	592
1935	606
1936	681
1937	683
1938	747
1939	525
1940	671
1941	379
1942	716
1943	645
1944	427
1945	874
1946	549
1947	737
1948	636
1949	551
1950	674
1951	771
1952	894
1953	661
1954	469
1955	694
1956	622
1957	441
1958	649
1959	518
1960	632
1961	530
1962	441
1963	361
1964	394
1965	253
1966	336
1967	534
1968	518
1969	502
1970	568
1971	620
1972	863
1973	844
1974	691
1975	806
1976	654
1977	724
1978	646
1979	801
1980	412
1981	404
1982	515
1983	746
1984	695
1985	447
1986	636
1987	589
1988	448
1989	588
1990	694
1991	436
1992	478
1993	662
1994	691
1995	460
1996	985
1997	474
1998	626
1999	465
2000	611
2001	412
2002	502
2003	1,040
2004	808
2005	779
2006	865
2007	659
2008	784
2009	673
2010	654
2011	1,217
2012	508
2013	527
2014	570
2015	454
2016	397
2017	524
2018	1,032
2019	785
2020	614
2021	760
2022	605
2023	701
2024	691

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	1913–2024
Completeness	100.0% of the periods in that span are held.
Continuity	Continuous: every year from 1913 to 2024 is held.
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 Delaware-Musconetcong and what each holds
Gauge	Measures	Values	Record
Musconetcong River near Bloomsbury NJ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	357	1903–2026
Delaware River at Trenton NJ	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	352	1897–2026
Pequest River at Pequest NJ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	349	1921–2026
Paulins Kill at Blairstown NJ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	344	1921–2026
Delaware River at Belvidere NJ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	344	1903–2026
Assunpink Creek at Trenton NJ	catchment area, annual maximum river flow, mean river flow, mean river flow, water year	307	1923–2026
Musconetcong River at outlet of Lake Hopatcong NJ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	263	1928–2026
Beaver Brook near Belvidere NJ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	254	1922–2026
Musconetcong River near Hackettstown NJ	burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year	215	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 — 02040105. 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
Musconetcong River near Bloomsbury NJ	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
Delaware River at Trenton NJ	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
Pequest River at Pequest NJ	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
Paulins Kill at Blairstown NJ	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
Delaware River at Belvidere NJ	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
Assunpink Creek at Trenton NJ	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
Musconetcong River at outlet of Lake Hopatcong NJ	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
Beaver Brook near Belvidere NJ	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
Musconetcong River near Hackettstown NJ	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 5 of them, which makes it a full profile.

Information-gain signals held for this water body
Signal	Held	Counts
Gauges holding a real record	9	yes, 3 or more
Years spanned	130	yes, 20 or more
Values held	2,785	yes, 1000 or more
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-01457000.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 Delaware-Musconetcong gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-middle-delaware-musconetcong/

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 Delaware-Musconetcong 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 confidence2025-05-14

Source: USGS — National Water Information System, USGS site 01457000, 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.