HydrionisGlobal Water Intelligence
HUC8 subbasin

Lower Broad

2 monitoring stations within this area in United States, holding 263 values between 1897 and 2026. A United States federal hydrologic unit at the eight-digit subbasin level — a drainage area, not a river. Many subbasins take the name of the largest river within them, and the gauges below are anywhere inside the area, including on tributaries.

United StatesHUC8 subbasin

The monitoring network within this area

Hydrionis holds 263 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
263
Values held
1897–2026
Record spans
Gauges within the Lower Broad huc8 subbasin
2 monitoring points, positioned as the publisher records them.
Gauges within the Lower Broad huc8 subbasinBROAD RIVER AT RICHTEX, S. C., BROAD RIVER AT ALSTON, SCBROAD RIVER AT RICHTEX, S. C.BROAD RIVER AT ALSTON, SC

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 BROAD RIVER AT RICHTEX, S. C.
The highest instantaneous discharge the publisher recorded in each year — a flood peak as measured, not a daily average of one. 1926–1983.
Largest measured flow of each year at BROAD RIVER AT RICHTEX, S. C.Largest measured flow of each year at BROAD RIVER AT RICHTEX, S. C.: BROAD RIVER AT RICHTEX, S. C. in m³/s, from 1926 to 1983.02,0004,0006,0008,000m³/s1926193619441952195919681975BROAD RIVER AT RICHTEX, S. C. 1926: 1,141 m³/sBROAD RIVER AT RICHTEX, S. C. 1927: 804 m³/sBROAD RIVER AT RICHTEX, S. C. 1928: 6,286 m³/sBROAD RIVER AT RICHTEX, S. C. 1929: 2,498 m³/sBROAD RIVER AT RICHTEX, S. C. 1929: 6,456 m³/sBROAD RIVER AT RICHTEX, S. C. 1930: 651 m³/sBROAD RIVER AT RICHTEX, S. C. 1932: 1,450 m³/sBROAD RIVER AT RICHTEX, S. C. 1932: 2,860 m³/sBROAD RIVER AT RICHTEX, S. C. 1934: 974 m³/sBROAD RIVER AT RICHTEX, S. C. 1934: 2,396 m³/sBROAD RIVER AT RICHTEX, S. C. 1936: 4,446 m³/sBROAD RIVER AT RICHTEX, S. C. 1936: 2,050 m³/sBROAD RIVER AT RICHTEX, S. C. 1937: 1,580 m³/sBROAD RIVER AT RICHTEX, S. C. 1939: 1,512 m³/sBROAD RIVER AT RICHTEX, S. C. 1940: 3,398 m³/sBROAD RIVER AT RICHTEX, S. C. 1941: 1,399 m³/sBROAD RIVER AT RICHTEX, S. C. 1942: 1,509 m³/sBROAD RIVER AT RICHTEX, S. C. 1943: 1,620 m³/sBROAD RIVER AT RICHTEX, S. C. 1944: 2,398 m³/sBROAD RIVER AT RICHTEX, S. C. 1945: 2,735 m³/sBROAD RIVER AT RICHTEX, S. C. 1946: 1,676 m³/sBROAD RIVER AT RICHTEX, S. C. 1947: 1,637 m³/sBROAD RIVER AT RICHTEX, S. C. 1948: 1,399 m³/sBROAD RIVER AT RICHTEX, S. C. 1948: 2,710 m³/sBROAD RIVER AT RICHTEX, S. C. 1949: 1,472 m³/sBROAD RIVER AT RICHTEX, S. C. 1950: 866 m³/sBROAD RIVER AT RICHTEX, S. C. 1952: 2,398 m³/sBROAD RIVER AT RICHTEX, S. C. 1953: 1,189 m³/sBROAD RIVER AT RICHTEX, S. C. 1954: 1,832 m³/sBROAD RIVER AT RICHTEX, S. C. 1955: 1,223 m³/sBROAD RIVER AT RICHTEX, S. C. 1956: 1,189 m³/sBROAD RIVER AT RICHTEX, S. C. 1957: 900 m³/sBROAD RIVER AT RICHTEX, S. C. 1957: 1,583 m³/sBROAD RIVER AT RICHTEX, S. C. 1958: 883 m³/sBROAD RIVER AT RICHTEX, S. C. 1959: 1,583 m³/sBROAD RIVER AT RICHTEX, S. C. 1961: 1,603 m³/sBROAD RIVER AT RICHTEX, S. C. 1962: 1,583 m³/sBROAD RIVER AT RICHTEX, S. C. 1963: 2,132 m³/sBROAD RIVER AT RICHTEX, S. C. 1964: 2,818 m³/sBROAD RIVER AT RICHTEX, S. C. 1964: 2,888 m³/sBROAD RIVER AT RICHTEX, S. C. 1966: 1,849 m³/sBROAD RIVER AT RICHTEX, S. C. 1967: 2,110 m³/sBROAD RIVER AT RICHTEX, S. C. 1968: 1,308 m³/sBROAD RIVER AT RICHTEX, S. C. 1969: 1,492 m³/sBROAD RIVER AT RICHTEX, S. C. 1970: 1,150 m³/sBROAD RIVER AT RICHTEX, S. C. 1971: 1,642 m³/sBROAD RIVER AT RICHTEX, S. C. 1972: 1,744 m³/sBROAD RIVER AT RICHTEX, S. C. 1973: 2,098 m³/sBROAD RIVER AT RICHTEX, S. C. 1974: 1,345 m³/sBROAD RIVER AT RICHTEX, S. C. 1975: 2,687 m³/sBROAD RIVER AT RICHTEX, S. C. 1975: 997 m³/sBROAD RIVER AT RICHTEX, S. C. 1976: 4,134 m³/sBROAD RIVER AT RICHTEX, S. C. 1978: 1,826 m³/sBROAD RIVER AT RICHTEX, S. C. 1979: 2,047 m³/sBROAD RIVER AT RICHTEX, S. C. 1980: 1,818 m³/sBROAD RIVER AT RICHTEX, S. C. 1980: 1,322 m³/sBROAD RIVER AT RICHTEX, S. C. 1982: 1,758 m³/sBROAD RIVER AT RICHTEX, S. C. 1983: 1,371 m³/s

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 (0 events)

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
PeriodBROAD RIVER AT RICHTEX, S. C. (m³/s)
19261,141
1927804
19286,286
19292,498
1930651
19321,450
1934974
19364,446
19371,580
19391,512
19403,398
19411,399
19421,509
19431,620
19442,398
19452,735
19461,676
19471,637
19481,399
19491,472
1950866
19522,398
19531,189
19541,832
19551,223
19561,189
1957900
1958883
19591,583
19611,603
19621,583
19632,132
19642,818
19661,849
19672,110
19681,308
19691,492
19701,150
19711,642
19721,744
19732,098
19741,345
19752,687
19764,134
19781,826
19792,047
19801,818
19821,758
19831,371

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 existMeasured
Period held1926–1983
Completeness84.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps
  • 9 separate periods inside 1926–1983 hold no value. They are drawn as breaks in the line and are never interpolated across.
ContinuityThe record begins in 1926 and is not continuous from it: 58 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 publisher2026-10-01
RedistributionPermitted by the upstream licences
Commercial reusePermitted by the upstream licences. No Hydrionis access tier can widen this.
MethodologyHow 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 BROAD RIVER AT RICHTEX, S. C., as a depth
The year's flow spread over the land draining to this gauge, in millimetres — the same unit rainfall is measured in. 1926–1982.
Water leaving the catchment above BROAD RIVER AT RICHTEX, S. C., as a depthWater leaving the catchment above BROAD RIVER AT RICHTEX, S. C., as a depth: BROAD RIVER AT RICHTEX, S. C. in mm, from 1926 to 1982.200400600800mm19261935194219491956196319701977BROAD RIVER AT RICHTEX, S. C. 1926: 328 mmBROAD RIVER AT RICHTEX, S. C. 1927: 292 mmBROAD RIVER AT RICHTEX, S. C. 1930: 334 mmBROAD RIVER AT RICHTEX, S. C. 1931: 333 mmBROAD RIVER AT RICHTEX, S. C. 1932: 529 mmBROAD RIVER AT RICHTEX, S. C. 1933: 348 mmBROAD RIVER AT RICHTEX, S. C. 1934: 418 mmBROAD RIVER AT RICHTEX, S. C. 1935: 363 mmBROAD RIVER AT RICHTEX, S. C. 1936: 737 mmBROAD RIVER AT RICHTEX, S. C. 1937: 568 mmBROAD RIVER AT RICHTEX, S. C. 1938: 313 mmBROAD RIVER AT RICHTEX, S. C. 1939: 380 mmBROAD RIVER AT RICHTEX, S. C. 1940: 291 mmBROAD RIVER AT RICHTEX, S. C. 1941: 282 mmBROAD RIVER AT RICHTEX, S. C. 1942: 363 mmBROAD RIVER AT RICHTEX, S. C. 1943: 423 mmBROAD RIVER AT RICHTEX, S. C. 1944: 469 mmBROAD RIVER AT RICHTEX, S. C. 1945: 430 mmBROAD RIVER AT RICHTEX, S. C. 1946: 460 mmBROAD RIVER AT RICHTEX, S. C. 1947: 434 mmBROAD RIVER AT RICHTEX, S. C. 1948: 550 mmBROAD RIVER AT RICHTEX, S. C. 1949: 565 mmBROAD RIVER AT RICHTEX, S. C. 1950: 326 mmBROAD RIVER AT RICHTEX, S. C. 1951: 285 mmBROAD RIVER AT RICHTEX, S. C. 1952: 418 mmBROAD RIVER AT RICHTEX, S. C. 1953: 349 mmBROAD RIVER AT RICHTEX, S. C. 1954: 298 mmBROAD RIVER AT RICHTEX, S. C. 1955: 250 mmBROAD RIVER AT RICHTEX, S. C. 1956: 312 mmBROAD RIVER AT RICHTEX, S. C. 1957: 417 mmBROAD RIVER AT RICHTEX, S. C. 1958: 474 mmBROAD RIVER AT RICHTEX, S. C. 1959: 511 mmBROAD RIVER AT RICHTEX, S. C. 1960: 575 mmBROAD RIVER AT RICHTEX, S. C. 1961: 513 mmBROAD RIVER AT RICHTEX, S. C. 1962: 492 mmBROAD RIVER AT RICHTEX, S. C. 1963: 406 mmBROAD RIVER AT RICHTEX, S. C. 1964: 717 mmBROAD RIVER AT RICHTEX, S. C. 1965: 496 mmBROAD RIVER AT RICHTEX, S. C. 1966: 377 mmBROAD RIVER AT RICHTEX, S. C. 1967: 397 mmBROAD RIVER AT RICHTEX, S. C. 1968: 371 mmBROAD RIVER AT RICHTEX, S. C. 1969: 463 mmBROAD RIVER AT RICHTEX, S. C. 1970: 319 mmBROAD RIVER AT RICHTEX, S. C. 1971: 532 mmBROAD RIVER AT RICHTEX, S. C. 1972: 511 mmBROAD RIVER AT RICHTEX, S. C. 1973: 615 mmBROAD RIVER AT RICHTEX, S. C. 1974: 460 mmBROAD RIVER AT RICHTEX, S. C. 1975: 666 mmBROAD RIVER AT RICHTEX, S. C. 1976: 536 mmBROAD RIVER AT RICHTEX, S. C. 1977: 413 mmBROAD RIVER AT RICHTEX, S. C. 1978: 392 mmBROAD RIVER AT RICHTEX, S. C. 1979: 546 mmBROAD RIVER AT RICHTEX, S. C. 1980: 514 mmBROAD RIVER AT RICHTEX, S. C. 1981: 262 mmBROAD RIVER AT RICHTEX, S. C. 1982: 458 mm

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 (0 events)

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
PeriodBROAD RIVER AT RICHTEX, S. C. (mm)
1926328
1927292
1930334
1931333
1932529
1933348
1934418
1935363
1936737
1937568
1938313
1939380
1940291
1941282
1942363
1943423
1944469
1945430
1946460
1947434
1948550
1949565
1950326
1951285
1952418
1953349
1954298
1955250
1956312
1957417
1958474
1959511
1960575
1961513
1962492
1963406
1964717
1965496
1966377
1967397
1968371
1969463
1970319
1971532
1972511
1973615
1974460
1975666
1976536
1977413
1978392
1979546
1980514
1981262
1982458

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 existDerived Computed by Hydrionis
Period held1926–1982
Completeness96.5% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps
  • One period inside 1926–1982 holds no value: 1928 to 1929, 2 years with no reading. It is drawn as a break in the line and is never interpolated across.
ContinuityThe record begins in 1926 and is not continuous from it: 57 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 read2026-10-01 · when the records this was computed from were last read from their publishers
Calculation date2026-08-24 · when the calculation method was last versioned, not a reading of any publisher
RedistributionPermitted by the upstream licences
Commercial reusePermitted by the upstream licences. No Hydrionis access tier can widen this.
MethodologyHow this was produced

Every gauge Hydrionis holds within this area

GaugeMeasuresValuesRecord
BROAD RIVER AT RICHTEX, S. C.burned area within 50 km, catchment area, annual maximum river flow, mean river flow, mean river flow, water year2061925–2026
BROAD RIVER AT ALSTON, SCcatchment area, annual maximum river flow571897–2026

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 — 03050106. 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.

GaugeEvidenceEstablished
BROAD RIVER AT RICHTEX, S. C.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/42026-10-02
BROAD RIVER AT ALSTON, SCStated 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/42026-10-02

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.

SignalHeldCounts
Gauges holding a real record2no
Years spanned130yes, 20 or more
Values held263no
Distinct measurements5yes, 2 or more
Publishers measuring it2yes, 2 or more
Official identifiers1recorded, not counted

Use this data

Use this data

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), Lower Broad gauge records, accessed 2026-10-05, hydrionis.com/waters/united-states-lower-broad/

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 Lower Broad 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 confidence1983-03-19

Source: USGS — National Water Information System, USGS site 02161500, 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.

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