Intergovernmental oceanographic commission (of unesco) information on eastern african sea level



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Table 2-2. Benchmarks of the operational tide gauges in Mozambique, including the GLOSS station of Inhambane. (IHP) Portuguese

Hydrographic Institute

Tide gauge station

Station code

Benchmarks de tails







Reference

Year of installation

Responsible

height

(m)

Description

Maputo

1

MN1

MN2

MNF

MN23

1941

1941

1998

1995

IHP

IHP

INAHINA

INAHINA

6.026

5.66



- Bronze mark fixed in the tide gauge door

- Bronze plate fixed at the entrance of the dry dock

- Bronze plate with a galvanised steel ring


Inhambane

2

NP124AT2

SH-MN1


1980


INAHINA

8.187

7.286

- Small circular bronze plate fixed at the entrance of the old Catholic Church

- Brass plate fixed near the entrance of the Administração Marítima building

Beira

3

MN1
SUNP11
NP19

MN4

MN5

1968
1997

1968

1997

IHP
INAHINA

IHP

INAHINA

9.018
8.789
8.014

7.943

7.978

- Bronze plate fixed in the wall of the W building of CFM, at the right side of the entrance to the lifts

- Brass mark fixed at the top of the stairs of the court building, facing the Manica building.

- Bronze mark …


Quelimane

5

MN1

MN2

MN2

1971

1963

1963

IHP

IHP

IHP

6.249

6.466

4.726

- Brass plate in the pavement over the bridge which gives access to the harbour

- Plate located on the car gate door in the former residence of the harbour master

- Mark located near the extreme end of the fixed tub

Nancala

12

MN1
MNP

1971
1974

IHP
IHP

6.57
17.237

- Plate fixed near the gate of the store house of the customers police, at the entrance of the harbour

- Plate fixed in a cemented mark, protected with a cemented seal, near the house of Eng. Silva

Pemba

9

MN1

MN4

MN2

1964

1970

1964

IHP

IHP

IHP

5.71

4.096

6.500

- Plate fixed on the pavement, in the SW end of the harbour

- Plated cemented in the stairs, in the W side of the harbour



The Inhambane station, as mentioned above, is a GLOSS station. The tide gauge was installed the harbour in the Inhambane City. The city is located in a long north-south oriented lagoon, at approximately 23º 40’S and 35º 19’E. The lagoon is long, narrow and shallow, with several sandbanks. The length is about 20 nautical miles, and 3 nautical miles average width. The harbour is located at about 13 miles from the open sea. There is a small river discharging into the lagoon. The water temperature in the bay varies from 20ºC to 31 ºC over the year (Meisfjord, 1997). There is a large tide phase lag between the tides in the sea and in the harbour, due to the long extension and the shallowness of the lagoon.


The station worked well for one year, from October 1948 to September 1949. The data obtained were of good quality. The station was interrupted for such long period, and it was rehabilitated in 1993 as a GLOSS station. It worked intermittently for two years, from October 1993 to May 1995. The data obtained were of poor quality.
(other information related to these stations, including the costs for maintenance of the station will follow later)





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