(Last of two parts)
Revisiting the day of the flash flood, there is a sense that all the elements that could make a disaster happen happened that day.
In the morning of November 5, 1991, Typhoon Uring (international name:Thelma) dumped heavy rains as it moved slowly over Leyte, including the Ormoc watershed. The intense rainfall, which had been going on for several days, triggered a massive volume of water to rampage downstream with debris and land sediments.
The flood lasted just over three hours and inundated a square kilometer of commercial and residential areas of Ormoc City proper.
Floodwater surfaces rose by seven feet in 15 minutes just before noontime, witnesses said. An estimated 22,835,000 cubic meters of water flooded the city.
“The sedimentation that took place doubled the volume of fluid that flooded Ormoc,” according to the Manila Observatory Research (ERD, 1992).
Eleuterio Lugas — a 61-year-old broom maker who was a resident of Biliboy village near the current site of the Anilao slit dam — recalled there was heavy rain with little wind for three days. Then the skies darkened and heavier rain pounded the city.
At first he was happy to gather some coconuts that floated with the onrush of water in the river, but the water rose so quickly that he had run to higher ground. A neighbor and her 11-year-old daughter got swept by the flash flood.
When he walked through the river on his way to Barangay Alegria after the flooding, at first he thought he was stepping on banana stalks, but they turned out to be bodies of children and adults buried in the muddy silt and debris.
Dead bodies are loaded onto a truck. AP photo by Boy Cabrido.
Today, his house made of bamboo overlooks the Anilao slit dam, one of the flood mitigating structures built with the Japanese government’s assistance. He feels confident that if a similar flood comes, the slit dam will stop the debris, logs and silt.
His son-in-law Avelino Aguirre, who worked in the Japan International Cooperation Agency project, said the slit dam structure is made of thick steel with cement poured inside.
Effective Flood Mitigation Measures
The JICA, through a grant, built four bridges and three slit dams between 1997 and 2001 to mitigate floods and landslides in Ormoc.
It likewise facilitated the widening of the city’s main rivers of Anilao and Malbasag, and the relocation of residents from the riverbanks.
Engr. Milany L. Bernal of the City Engineers Office, explained that JICA’s flood mitigation project widened the Anilao and Malbasag Rivers after a measurement of the water volume, flow and pressure found that these were major factors in the flooding.
There are “hydraulic drops” to make the water flow gradually and three slit dams (Anilao, Biliboy and Malbasag) to stop or control the debris and logs carried by the rampaging waters, Bernal explained.
The effectiveness of the JICA structures, she said, were tested during typhoon Gilas in 2003, and typhoon Yolanda in 2013.
She noted, however, that there are problems of “encroachment” near the dam structures despite a fence placed there by the City Engineers Office.
The JICA Committee includes the Mayor’s Office, the DPWH and the City Engineers Office whose task is to maintain and monitor the flood mitigation facilities: the three slit dams, the hydraulic drops and the three bridges, said Yvonne de los Santos, also from the City Engineer’s Office.
Part of their task, Bernal said, is to control vegetation on the river, clean canals and river channels, and ensure there are no “encroachers” near the structures.
Both Bernal and de los Santos said the flood control measures succeeded in preventing a flash flood when Typhoon Gilas came in 2003, bringing the same volume and level of water as Typhoon Uring did in 1991.
“The volume of water became manageable with the widened rivers, and the debris got stopped from being swept by the silt and water,” de los Santos noted.
City Planning and Development Office head Raoul E. Cam said his office intends to transform the riverbanks into urban green spaces that people can enjoy as a park and help protect. He said he will push for barangays to be involved in the monitoring and maintenance of the flood mitigating structures.
Recovering forest in watershed
Early morning in mid-March, some 150 student volunteers from Ormoc Senior City High School hiked to Sitio Quarry to plant seedlings of local tree species on a steep watershed area there.
They were guided by some teachers and forest guard Anthony Dionaldo to ensure the seedlings are planted on critical parts of the watershed.
One of the tasks of the city’s Environment and Natural Resources Office (ENRO) is to ensure the recovery of the forest in Ormoc’s watershed, like the one in Milagro, in a step-by-step process, ENRO head Rafael Dumalan told Vera Files.
While there is P5 million allotted for reforestation, he clarified that there is no big project for planting trees. He said they cater to people who belong to organized groups like students in schools, non-government organizations and private entities.
At the time of the flash flood in 1991, of the total land area of the Ormoc watershed, only “3.3% was classified as timberland—confined to the peaks,” a 1992 study of the Environment and Research Division of Manila Observatory said.
The same study noted that “even the residual forest was absent.” At that time, 96.7% of Ormoc watershed was classified as alienable and disposable land, open for private acquisition.
There were more than 700 lot claimants within the watershed, cadastral records show, but “land ownership was held and controlled by just a few big families.” (MO Study 1992).
Rafael Dumalan, head of Ormoc city’s Environment and Natural Resources Office. Photo by Liza Macalandag
Dumalan emphasized the need to plant the appropriate endemic tree species, like bitangkol, lawaan and talisay in watershed areas for the recovery of denuded forests in Ormoc. His office supports a seedling nursery in Milagro village and partners with teachers and students, as well as those under the government’s drug rehabilitation program.
Since 1991, he said municipal government units have facilitated the planting of trees in their watershed areas. His next project involves riparian vegetation, like planting mangroves and bamboos beside rivers.
The idea, he said, is to save the rivers, to make them flow naturally, and continuously ensure the river is not blocked by informal settlers as what happened in 1991.
Forest guard Dionaldo said he and three colleagues work in sitio Quarry watershed, and part of their job is to maintain the reforested areas, water the seedlings if necessary, and report encroachers and tree cutters.
Mark Gerald Talle, 17, a grade 10 student who planted a talisay seedling, said he sees the value of planting trees in the watershed for the future.
The activity is part of requirement for graduating students, teacher Jemo de Asis said. The first batch of student volunteers numbered 300, she added.
The reforestation efforts include awareness campaigns on the importance of protecting the ecosystem, given the undeniable changing climate pattern, Dumalan said.
Many believe the denudation of the forest on the watershed hastened the flooding in 1991 since deep root anchors were absent to hold the water flow.
There is no doubt that the Anilao-Malbasag watershed was the major drainage basin that directly influenced the flooding of the city. The watershed is drained mainly by the Anilao and Malbasag Rivers.
Protecting the watershed ecosystem
DENR 8 Regional Executive Director Crizaldy Barcelo, in a statement released on International Day of Forest, underscored the importance of raising awareness on how sustainably managed forests contribute to the environment.
“Forests secure our soil and water resources, mitigate climate change, and provide habitat for animals and livelihood for human. Its importance cannot be underestimated,” Barcelo stressed.
To intensify the effort, DENR is also implementing a biodiversity protection system using advanced technology called the LAWIN Protection System. Using a mobile application called cybertracker, users and patrollers from the DENR report real-time environmental abuses from the site.
Making proactive moves in disaster preparedness
Ciriaco Solibao III, the head of the city’s Disaster Risk Reduction Management Office, said his office had been organizing the barangays to be prepared for disasters, including leading information and education drives on disaster management for 42 most flood-prone villages.
He said his plans include strengthening the early warning and weather monitoring systems, as well as installing a water level system.
The focus of Ormoc’s disaster management office is not so much evacuations, but pre-emptive action. The rule is to be “pro-active, not just reactive,” Solibao added.
Barangay covered courts are targeted as primary evacuation centers, while schools are last priority, he said. Barangays are encouraged to have two-story halls, and covered courts must be equipped with toilets, bathrooms and cooking areas.
Solibao’s office is also identifying people who may be ready to receive evacuees.
At the 25th commemoration of the Ormoc flood disaster, JICA Chief Representative Susumu Ito observed that Ormoc’s experiences in disaster risk reduction management “show that we can get things done together by raising our understanding of disasters, harnessing available resources, and strengthening community preparedness.”
(This story is produced by VERA Files under a project supported by the Internews’ Earth Journalism Network, which aims to empower journalists from developing countries to cover the environment more effectively.)