Harwich site history
History summary
| Station name | Harwich |
|---|---|
| Country | UK |
| Latitude of measuring point |
2004 onwards: 51° 56' 52.8" N
01/08/1975 14:00 to 1976: 51° 56' 54" N Prior to 01/08/1975 14:00: 51° 56' 51" N |
| Longitude of measuring point |
2004 onwards: 01° 17' 31.6" E
01/08/1975 14:00 to 1976:: 01° 17' 29" E Prior to 01/08/1975 14:00: 01° 17' 04" E |
| OS grid ref. of measuring point |
2004 onwards: TM 2634 3284
01/08/1975 14:00 to 1976:: TM 2629 3289 Prior to 01/08/1975 14:00: TM 2582 3275 |
| Datum reference |
All data refer to Admiralty Chart Datum (ACD)
ACD = ODN -2.02m |
| Time reference | GMT (hours 00-23) |
| Contributor |
Environment Agency Anglian Regional Office,
Kingfisher House, Goldhay Way, Orton Goldhay, Peterborough, Cambridgeshire, PE2 5ZR |
| Instrument type |
A Cary-Porter gauge was installed in 1917 and was handed over to the Harwich Harbour Board on 24 Oct 1929.
The gauge was resited three times (1936, 1939 and 1948) and was raised in 1950. During the period 1951-53 records were lost in a flood, but fortunately the log of high and low waters was preserved. The gauge records were retained at Harwich. A Lege gauge was installed in 1953, together with a new recorder (July 1966). In addition to this, another new Lege gauge with a Munro well-head mechanism (No. 1861/3945/11) was installed in February 1975. The tide gauge well was enlarged in July 1966. Dataring installed in 2004. |
| Site of measuring point | Attached to pier under cabinet. |
| Position of tide gauge building | TM 2634 3284 - GRP cabinet on pier. |
| Observational period | 1917-1976, 2004-2026 |
Benchmark descriptions
| Benchmark | OS grid ref. | Description | Height above ODN (m) |
|---|---|---|---|
| TGBM | N/A | N/A | N/A |
ODN = Ordnance Datum Newlyn
Parameters
PLEASE NOTE: All parameters listed below are sea level measured in metres. Different parameter codes represent different gauges. For an explanation of the codes, please see the BODC parameter dictionary.
| Period | Parameters | Completeness index (%) | Sample interval |
|---|---|---|---|
| 1954 | ASLVZZ01 | 100 | 60 minutes |
| 1955 | ASLVZZ01 | 100 | 60 minutes |
| 1956 | ASLVZZ01 | 100 | 60 minutes |
| 1957 | ASLVZZ01 | 100 | 60 minutes |
| 1958 | ASLVZZ01 | 100 | 60 minutes |
| 1959 | ASLVZZ01 | 78 | 60 minutes |
| 1960 | ASLVZZ01 | 100 | 60 minutes |
| 1967 | ASLVZZ01 | 95 | 60 minutes |
| 1968 | ASLVZZ01 | 99 | 60 minutes |
| 1969 | ASLVZZ01 | 99 | 60 minutes |
| 1970 | ASLVZZ01 | 87 | 60 minutes |
| 1971 | ASLVZZ01 | 99 | 60 minutes |
| 1972 | ASLVZZ01 | 96 | 60 minutes |
| 1973 | ASLVZZ01 | 83 | 60 minutes |
| 1974 | ASLVZZ01 | 100 | 60 minutes |
| 1975 | ASLVZZ01 | 87 | 60 minutes |
| 1976 | ASLVZZ01 | 32 | 60 minutes |
| 2004 | ASLVBG02 | 31 (Installed in April) | 15 minutes |
| 2005 | ASLVBG02 | 98 | 15 minutes |
| 2006 | ASLVBG02 | 97 | 15 minutes |
| 2007 | ASLVBG02 | 100 | 15 minutes |
| 2008 | ASLVBG02 | 91 | 15 minutes |
| 2009 | ASLVBG02 | 100 | 15 minutes |
| 2010 | ASLVBG02 | 99 | 15 minutes |
| 2011 | ASLVBG02 | 100 | 15 minutes |
| 2012 | ASLVBG02 | 98 | 15 minutes |
| 2013 | ASLVBG02 | 100 | 15 minutes |
| 2014 | ASLVBG02 | 100 | 15 minutes |
| 2015 | ASLVBG02 | 100 | 15 minutes |
| 2016 | ASLVBG02 | 100 | 15 minutes |
| 2017 | ASLVBG02 | 100 | 15 minutes |
| 2018 | ASLVBG02 | 98 | 15 minutes |
| 2019 | ASLVBG02 | 100 | 15 minutes |
| 2020 | ASLVBG02 | 99 | 15 minutes |
| 2021 | ASLVBG02 | 100 | 15 minutes |
| 2022 | ASLVBG02 | 100 | 15 minutes |
| 2023 | ASLVBG02 | 99 | 15 minutes |
| 2024 | ASLVBG02 | January - December | 15 minutes |
| 2025 |
ASLVBG02
ASLVRADR |
January - August
September - December |
15 minutes |
| 2026 | ASLVRADR | January | 15 minutes |
| 2026 | ASLVRADR | January - May | 15 minutes |
Quality assessment
All data have been compared with the current Harmonic Constants library, and residuals checked. Records have been visually inspected for spikes, datum shifts and timing errors.
Where there are problems with the primary channel, data may be available from the backup channel. Please contact enquiries@bodc.ac.uk for more information.
On 10/02/2012 a new data logger was installed. Tests were carried out to ensure the logger was functioning correctly, resulting in some data being lost.
November 2012 - The file output has been altered to reflect the Contributor name change from Proudman Oceanographic Laboratory to National Oceanography Centre, Liverpool. Also, the Parameter
code has been improved and now uses a controlled vocabulary.
Missing and suspect data have been reported on the following day numbers:-
| Period | Parameter(s) | Missing data | Suspect data |
|---|---|---|---|
| 1954 | ASLVZZ01 | None | 001-002,015-016,052,066,196,266,283,303,324,332,342-343,365 |
| 1955 | ASLVZZ01 | None | 029,044-045,141,194,272,340,342,349-350 |
| 1956 | ASLVZZ01 | None | 012,017,101,251,331-332,336,343 |
| 1957 | ASLVZZ01 | None | 065,221 |
| 1958 | ASLVZZ01 | None | 048,268 |
| 1959 | ASLVZZ01 | 001-005,097-110,180-243 | 291,300 |
| 1960 | ASLVZZ01 | None | 047 |
| 1967 | ASLVZZ01 | 001-003,022,042,069-075,126-129,143-145,195 | 161 |
| 1968 | ASLVZZ01 | 243-244 | None |
| 1969 | ASLVZZ01 | 266-267,294-295 | None |
| 1970 | ASLVZZ01 | 038-041,052-055,076-090,104-110,115,210-217,231-232,266-269,282-284,344-345 | 252-253 |
| 1971 | ASLVZZ01 | 017-018,187-188 | 230,307 |
| 1972 | ASLVZZ01 | 045-060 | 317-318 |
| 1973 | ASLVZZ01 | 094-095,265-267,281,310-365 | 043-044,087-088,092-093 |
| 1974 | ASLVZZ01 | 001-063,119-154,161-165,210-217,299,308-315,332-365 | 266 |
| 1975 | ASLVZZ01 | 001-038,046-048,050-051,215-216,224-227 | 268-270,331-332,335-336,346-347 |
| 1976 | ASLVZZ01 | 111-117,124-366 | 010-011 |
| 2004 | ASLVBG02 | 001-114 | None |
| 2005 | ASLVBG02 | 292-294,355-357 | None |
| 2006 | ASLVBG02 | 032-036,054-059,095-096 | None |
| 2007 | ASLVBG02 | None | 041-066,075-085,088-104,111,142,288-289,296-344 |
| 2008 | ASLVBG02 | 072-105 | 053-055,060-072,328,333-366 |
| 2009 | ASLVBG02 | None | 001-081,092-094,120-121,126,128-129,131-187,200-201 |
| 2010 | ASLVBG02 | 006,055 | 055 |
| 2011 | ASLVBG02 | None | 125 |
| 2012 | ASLVBG02 | 040-045,065 | 057,099-100,114-116,156,168,257-266,268-269,271 |
| 2013 | ASLVBG02 | None | 314-319,321-330,333-353 |
| 2014 | ASLVBG02 | None | 006-031,070-074,077-084,122-126,136-138,180-185,186,191-194,197,202,207-220,226-234,237-268,271-272,276-280,320-322,339-365 |
| 2015 | ASLVBG02 | None | 001-014,076,080-102,134,169 |
| 2016 | ASLVBG02 | None | 192-195,230,234,243,252-256,259-264,272-276,291,296-304,307-318,322,360 |
| 2017 | ASLVBG02 | None | 028-058,061-062,066-076,078-092,094-098,104,106,109,111-120,138-142,150,166-167,210,215-228,230,235-284,311-365 |
| 2018 | ASLVBG02 | 227,229,230,231-234 | 001-009,011-013,021-023,028-206,224-227,227-229,229-230,230-231,234-365 |
| 2019 | ASLVBG02 | None | 001-063,130,135-142,144-145,149,151,191-192,195-208,210-222,230-234,239,242-244,250,254-365 |
| 2020 | ASLVBG02 | 313 | 001-066,115,204-205 |
| 2021 | ASLVBG02 | None | 089,111-117,127,170-171,185,194,253-256,270,295,298,307-309,311,321,323,325,329-331,334-336,338-341,354,356 |
| 2022 | ASLVBG02 | None | 005,007,009,020,027,029-039,047-048,050,052,055,061,137-140,148-149,167,352-365 |
| 2023 | ASLVBG02 | 018 | 001-018,018-030,176-177,180-209,215-217,235,325 |
| 2024 | ASLVBG02 | 362-366 | 180,339,347-353,357-366 |
| 2026 |
ASLVBG02 (001-243)
ASLVRADR (244-) |
001-003,054,129,202-203,211-212,220,226-227,227-229,229-233,238
|
001,016-025,047-055,213-227,229,233,238-243
244-365 |
| 2026 | ASLVRADR | 068,090-098,100,117,121,130,142 | 001-090,098-100,100-117,117-121,121-130,130-142,142-151 |
