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 |
