Davao (Philippines) Site History
|Contributor||1984-present TOGA Sea Level Center|
|Instrument Type||Float and stilling well gauge, A.OTT, gravity gauge|
|Site of Gauge|
|Observational periods||1948 - present|
Tide gauge benchmark (TGBM) description
BM-11 - Davao City, intersection of Leon Garcia St. and zn Ave., the brass rod is on the concrete foundation of a lamppost on the NW corner of Magsaysay Park.
BH-1A, 8, 14 and 7H
All data are referred to a historic fixed benchmark (1951).
BM-11 was established June 1985
A suspicious signature exists in 1986. It appears from the daily averages to be a reference level shift of about 20 cm on 30 November. A similar feature of less magnitude exists at the same time for Jolo and Legaspi; thus the possibility of the suspicious signature being real exists. The originators have confirmed that no errors were obvious in the analog chart or processing.
The data contain numerous questionable fluctuations which may be a result of inaccurate timing of the gauge and/or from the tidal analysis not being able to resolve certain harmonics. Typhoon activity did not pass near.
|Year||CI(%)||QI(%)||Missing Data||Replaced Gaps or Bad Data||Questionable Fluctuations|
|1984||100||97||none||none||See comment above|
|1985||100||86||none||none||See comment above|
|1986||100||72||none||(00)125-(11)125 (22)277-(13)278||See comment above|
|1987||50||38||none||none||See comment above|
|1988||100||85||none||none||See comment above|
|1989||100||94||none||none||See comment above|
|1990||48||46||87-90,132-136||none||See comment above|