In a newspaper story on March 7 the marine geologist Kelvin Rodolfo noted that the project's design was "grossly inadequate" and "dangerous."He
said the estimate of land subsidence (sinking of land) was based on a 1990 document that presumed that the use of ground water would end in 1990 and that the consultants expected the additional subsidence to occur at a rate of only about one-half centimeter a year, causing only 15 centimeters of land subsidence by the year 2030.
said the consultants "totally ignored" in the design the effects of powerful winds, surge and waves that come with storms in Manila Bay, an assertion that Kin disputed.
alleged that the project designers ignored their own analyses that indicate the need to base their polder dikes with piles driven deeply through at least 15 meters of soft bay sediment.
1995 book Pinatubo and the Politics of Lahar, Rodolfo
, also a consultant of the National Institute of Geological Sciences (NIGS) at UP Diliman, cited documents and historical facts as the bases for his
group warned the Department of Public Works
and Highways publicly and privately against containing lahar with flood-control technology because the volcanic deposit is so much more powerful than water floods, and it behaves differently.
On Feb. 12 the group asked Rodolfo
to have an informal discussion with them about the seminar.The meeting took place at the NIGS office in Diliman.According to a source, the dialogue dealt with land subsidence and other information about it, but not the design or the land subsidence used in the CAMANAVA project.Rodolfo
even asked for a final copy of the main design of CAMANAVA for future reference.
On March 7 Rodolfo
noted in a newspaper story that the design of the CAMANAVA project was "grossly inadequate" and "dangerous."He
alleged that the consultants used obsolete and erroneous data in determining the height of the 8-km polder dike, based on the old subsidence rates, or how fast the four cities are sinking into the water.