Belton Lk, TX — storage

Storage now, against this reservoir's own record

538.97 Mm³

Stored, January 2004

63rd

Percentile among 50 Jans on record

-0.2%

Change over the 12 months to 2004-01

Storage in January 2004 was around the middle of the Jan record, ranked against 50 other Jans held for this reservoir.

No percentage departure from the Jan average is published here. No long-term average is held for this month, so there is nothing to compare with.

Storage, 1954–2004

Monthly mean storage

599 monthly values, 1954 to 2004

Monthly means of the publisher's daily record. Volume, not percentage of capacity — see below for why.

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

240 of 599 periods, evenly spaced across the record. Every value is in the download and the API; a table of all 599 would be longer than this page and unusable with a screen reader.
Period	Belton Lk Nr Belton, TX (Mm³)
March 1954	0.582
June 1954	16.4
August 1954	12.1
November 1954	14.1
January 1955	16.9
April 1955	47.3
June 1955	164
September 1955	191
November 1955	213
February 1956	211
April 1956	207
July 1956	249
September 1956	234
December 1956	146
February 1957	146
May 1957	822
July 1957	505
October 1957	292
December 1957	259
March 1958	300
May 1958	316
August 1958	255
October 1958	255
January 1959	254
March 1959	259
June 1959	266
August 1959	259
November 1959	317
January 1960	313
April 1960	254
June 1960	255
September 1960	251
November 1960	259
February 1961	411
April 1961	256
July 1961	330
September 1961	257
December 1961	258
February 1962	253
May 1962	257
July 1962	253
October 1962	262
December 1962	258
March 1963	255
May 1963	248
August 1963	242
October 1963	231
January 1964	232
March 1964	259
June 1964	294
August 1964	255
November 1964	269
January 1965	265
April 1965	272
June 1965	724
September 1965	264
November 1965	289
February 1966	263
April 1966	274
July 1966	260
September 1966	279
December 1966	259
February 1967	259
May 1967	229
July 1967	222
October 1967	214
December 1967	220
March 1968	386
May 1968	350
August 1968	256
October 1968	255
January 1969	259
March 1969	259
June 1969	259
August 1969	231
November 1969	244
January 1970	261
April 1970	355
June 1970	274
September 1970	264
November 1970	262
February 1971	257
April 1971	246
July 1971	192
September 1971	295
December 1971	362
February 1972	394
May 1972	403
July 1972	406
October 1972	389
December 1972	403
March 1973	465
May 1973	565
August 1973	548
October 1973	558
January 1974	552
March 1974	552
June 1974	540
August 1974	506
November 1974	754
January 1975	593
April 1975	570
June 1975	591
September 1975	543
November 1975	533
February 1976	516
April 1976	528
July 1976	578
September 1976	546
December 1976	552
February 1977	560
May 1977	712
July 1977	544
October 1977	515
December 1977	503
March 1978	506
May 1978	503
August 1978	412
October 1978	395
January 1979	405
March 1979	452
June 1979	619
August 1979	548
November 1979	524
January 1980	524
April 1980	541
June 1980	549
September 1980	492
November 1980	477
February 1981	473
April 1981	489
July 1981	601
September 1981	549
December 1981	550
February 1982	546
May 1982	553
July 1982	551
October 1982	529
December 1982	522
March 1983	552
May 1983	556
August 1983	536
October 1983	519
January 1984	501
March 1984	499
June 1984	489
August 1984	429
November 1984	424
January 1985	463
April 1985	568
June 1985	565
September 1985	513
November 1985	548
February 1986	579
April 1986	545
July 1986	648
September 1986	592
December 1986	571
February 1987	554
May 1987	558
July 1987	733
October 1987	539
December 1987	538
March 1988	549
May 1988	535
August 1988	502
October 1988	470
January 1989	459
March 1989	498
June 1989	577
August 1989	553
November 1989	534
January 1990	521
April 1990	562
June 1990	637
September 1990	558
November 1990	554
February 1991	548
April 1991	549
July 1991	554
September 1991	550
December 1991	717
February 1992	1,261
May 1992	966
July 1992	793
October 1992	545
December 1992	572
March 1993	721
May 1993	550
August 1993	531
October 1993	521
January 1994	547
March 1994	549
June 1994	553
August 1994	556
November 1994	542
January 1995	552
April 1995	595
June 1995	561
September 1995	552
November 1995	538
February 1996	522
April 1996	515
July 1996	454
September 1996	539
December 1996	543
February 1997	625
May 1997	659
July 1997	594
October 1997	531
December 1997	565
March 1998	607
May 1998	539
August 1998	505
October 1998	519
January 1999	541
March 1999	545
June 1999	543
August 1999	527
November 1999	475
January 2000	462
April 2000	466
June 2000	495
September 2000	455
November 2000	526
February 2001	560
April 2001	548
July 2001	533
September 2001	546
December 2001	551
February 2002	546
May 2002	534
July 2002	557
October 2002	517
December 2002	545
March 2003	550
May 2003	539
August 2003	518
October 2003	547
January 2004	539

Why this page shows a volume and not a percentage

Percentage full is a division, and the denominator is missing

“Percentage full” is the figure a drought is discussed in, and it is stored volume divided by capacity. Capacity is published on several different bases — gross, usable, live, and the figure at a particular spillway or licence condition — and dividing a stored volume by the wrong one produces a percentage confidently wrong by the ratio between them, at exactly the moment the number matters most.

Hydrionis holds storage measurements for this reservoir and does not hold a compatible authoritative capacity figure for it, so percentage full is not calculated. The volume above is what was actually measured. Where you need a percentage, take the publisher’s own capacity on its own stated basis and divide it yourself — the source is linked below, and knowing which basis you used is the whole point.

Rate and persistence

-0.10 Mm³

Mean drawdown per month over 12 months

0 of 24

Recent months below the 20th percentile for their own month

Rates are computed only across an unbroken run of months, so a rate is never divided by a period in which some of the change was not observed. Percentile counts compare each month with the same calendar month in every other year held.

Location

Belton Lk Nr Belton, TX

Gauge location

About this data

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	1954–2004
Completeness	97.9% of the periods in that span are held. Gaps are drawn as breaks and never interpolated.
Known gaps	Storage is a managed quantity. A falling line can be a rule curve, a scheduled release or a transfer to another system rather than a shortage of water, and nothing here distinguishes them. No capacity figure on a stated basis is held for this reservoir, so no percentage of capacity is computed.
Continuity	98% of the months between 1954 and 2004 are held. Monthly means of the publisher's own daily 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

Use this data

Machine-readable JSON /api/v1/observations/by-subject/reservoir-usgs-08102000.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), Belton Lk Nr Belton, TX reservoir records, accessed 2026-10-05, hydrionis.com/reservoirs/reservoir-usgs-08102000/

Cite Hydrionis where you rely on the compilation, the normalisation, the eligibility judgements or a chart. Where you use an unmodified published value, the publisher’s attribution is the one that is required; crediting Hydrionis as well is welcome and is not something Hydrionis can require of you.

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 Belton Lk Nr Belton, TX record 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 this comes from

599 monthly observations 1954–2004 Mm³

Spatially aggregatedHigh confidenceJanuary 2004

Source: USGS — National Water Information System, 08102000. Licence: Open.

Method: Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.

Reservoir storage is managed as well as observed: a drawdown may reflect an operating rule, flood-control rule curve or scheduled release rather than a shortage. Compare a month against the same month in other years, and do not read a fall as a supply signal without knowing the operating regime.

Retrieved 1 October 2026.

Monthly mean of daily reservoir storage published by the USGS in acre-feet and converted to millions of cubic metres. Months with fewer than 20 days of record are not published rather than averaged from a partial month.