Malakal (Belau) Site History

History Summary

Station name Malakal
Country Palau (Republic of Belau)
Latitude 07° 19.8' N
Longitude 134° 27.8' E
GLOSS No. 120
Time Reference GMT (hours 00-23)
Contributor UH Sea Level Center (1971-)
Scripps Institute of Oceanography (1969-70)
Instrument Type Unconfirmed (1969-70)
Bristol bubbler (1971-7/1974)
Fischer and Porter Analog-to-Digital Recorder (ADR) (8/1974-)
Handar Encoder (ENC), (1990-) (*used as primary gauge beginning May 1991)
Site of Gauge  
Observational Period 1969 - present

Reference Level

All heights have been referred to the station tide staff zero which is linked to fixed benchmarks.

Tide Gauge Benchmark (TGBM) Description

BM Control

USGS1 standard brass disc, stamped 'No 1 1969', set in concrete slab at entrance to tide house, a south end of Fisheries Development Wharf (established 13 May 1969).

Auxiliary Benchmarks

USGS2: standard brass disc, stamped 'No 2 1969', set in concrete step platform at E entrance to Fish. Dev. Reefer Plant, about 2.5ft above ground level (USGS2 & 3 established 13 May 1969).

USGS3: standard brass disc, stamped 'No 3 1969', set in concrete 2ftx3ft and projecting 1.5ft above ground level located at NE end of 11ft x70ft concrete cooling tank just N of Fish. Dev. Plant.

Other Benchmarks

USGS4: standard brass disc, stamped 'NO 4 1969' set in concrete at S end of sliding door entrance to Malakal Supply Warehouse.

USGS5: standard brass disc, stamped 'NO 5 1969' set in concrete foundation supporting marine railway at Palau shipyard.

AGS3: standard US Navy Hydrographic brass disc stamped 'BM #3 USS TANNER' located on top of sea wall 41ft W of tide house (established November 1984).

Quality Assessment by the UH Sea Level Center

Comment

The daily and monthly means reveal no apparent changes in the reference level and agree with Yap. Spike on 17 February 1996 associated with tsunami.

Year CI (%) Missing Data Replaced Gaps or Bad Data Questionable Fluctuations
1970 85 239-292,365 none none
1971 92 1-31 none 124-125
1972 73 244-250,275-366 none 134-136,258-259
1973 85 1-56 none 75-77,94,121-123,182-183,238,312-316,327,346-348,359-360
1974 83 32-38,164-169,186-239 (11)008-(03)009,(16)058-(05)059,(21)183-(12)184 13,63-65,83
1975 76 9-87,150-151,189-190,261-263 none 252-254
1976 100 none none none
1977 98 189-195 none 226-228
1978 92 121-123,267-283,318-325 none 317-318
1979 99 202-204 none 29-30
1980 97 54-55,155-165 none none
1981 99 284-287 none none
1982 100 none none none
1983 100 none none none
1984 100 none none none
1985 99 187-189 none none
1986 100 none none none
1987 92 245-275 none 355
1988 100 none none 20-22,48-51,294-297
1989 100 none none 134-135,161-164,215-219,230-232
1990 100 none none none
1991 98 123-126,215-219,230-233 none none
1992 100 none none none
1993 100 none none none
1994 97 128-136,145-147 (21)118-(12)119,(06)144-(02)145 none
1995 100 none none none
1996 100 none none none
1997 100 none none none
1998 100 none none none