Port Louis-C (Mauritius) Site History

History Summary

Station Port Louis-C
Country Mauritius
Latitude 20° 09.3' S
Longitude 057° 29.7' E
GLOSS No 018
Time Reference GMT (hours 00-23)
Contributor UH Sea Level Center in collaboration with Meteorological Services, Vacoas, Mauritius
Instrument Type 1) Leupold and Stevens (LS), model A-71,
2) Handar 436-A, Encoder (ENC),
3) Handar 436-B (ENB); all float gauges
Primary Gauge LS (1986-92)
ENC (1993-)
Site of Gauge The gauge is located at Granary Quay.
Observational periods 1986 - present

Reference Level

The sea level heights are referred to the zero point assigned to the tide gauge.

Tide Gauge Benchmark (TGBM) Description

Benchmark Description
(1) 3 metre mark on tide staff.
(2) One brass bolt at the edge of wharf of tide gauge.
(3) A bolt on the gauge.

Auxiliary Benchmarks

One bolt flush with wall located about 7.5m west of station.

Benchmark Relationships

There is a 3 metre mark tied to the National Primary Levelling Network and Fundamental benchmark TTP30. The 3 metre mark is 1.6788 metres above Admiralty Chart Datum. The bolt on the gauge is 3.0488 metres above Admiralty Chart Datum (February 1987 onwards).

Quality Assessment by the UH Sea Level Center

Comment

The daily or monthly means do not reveal any obvious reference level changes or trends.

Timing errors are evident in the hourly data prior to 1992.

Year CI (%) Missing Data Replaced Gaps or Bad Data Questionable Fluctuations
1986 39 266-275 none 341
1987 99 43-45,289-291 none 309,323
1988 97 253-255,259-261,355-359 none 33-34,75,226,317
1989 96 34-36,37-40,42-44,45-46,129-138 none 201-204,288,291-293,317-318,343-344
1990 97 62-64,138-148 (00)181-(23)181 27,29-30,41,86,201-202,228-229,349,363
1991 99 242-245,287-288 none 1,103,105,163-164,277-278
1992 100 none none none
1993 100 none none none
1994 100 none none none
1995 100 none (14)012-(04)013 none
1996 99 363-365 none none
1997 100 none none none
1998 100 none none none