{
  "id": 17038760,
  "title": "Philippine island fights rising seas with nature, not concrete",
  "url": "https://urgent.news/2026/10/29/philippine-island-fights-rising-seas-with-nature-not-concrete",
  "topic": "science",
  "section": "Science",
  "published": "2026-10-29T09:23:55.000Z",
  "source": {
    "name": "Phys.org",
    "slug": "phys-org",
    "url": "https://phys.org/news/2026-10-philippine-island-seas-nature-concrete.html"
  },
  "original_language": "en",
  "account": "Flood-prone Pamarawan Island, located north of Manila in the Philippines, is employing nature-based solutions to combat rising seas and storm surges. In response to frequent flooding and the inadequacies of concrete flood-control projects, which have cost the country billions of dollars, local authorities launched a first-of-its-kind initiative to build a barrier using bamboo poles and discarded oyster shells.\n\nInitially met with skepticism from officials and residents, the project began in 2022 when the city government of Malolos, home to the island, partnered with a Dutch engineering consultancy. By May 2023, workers had installed bamboo poles packed with brushwood along the coast, which are designed to slow water flow and trap sediment, gradually raising the seabed and supporting mangrove growth.\n\nRecently, workers have been building an oyster-shell breakwater about 100 meters offshore. This breakwater aims to lessen the impact of waves before they reach the community. Project manager Lyana Galang explained that the oyster-shell barriers work in tandem with the bamboo sediment traps, collectively reducing wave intensity.\n\nFilipino scientist Antonio Contreras emphasized that the Philippines has traditionally relied heavily on concrete dikes and seawalls, often without proper study. He argued that nature-based solutions should be embraced as they work with nature, rather than against it. However, he cautioned that these solutions might not be universally applicable, particularly in cases of catastrophic floods, and should complement conventional infrastructure.\n\nThe installation, which covers approximately 14 hectares (35 acres) along Manila Bay, cost 70 million pesos ($1.1 million), including maintenance. In comparison, a concrete seawall of similar size would have cost around 90 million pesos. The project's long-term effectiveness remains uncertain, with a scientific assessment expected next year to determine if mangrove planting can commence.\n\nResidents, such as fisherman Edgar Javier and 58-year-old Arsenia Cabigao, have already experienced significant relief from the installation. Javier stated that the breakwaters have softened waves and reduced flooding during typhoons and monsoon rains. Cabigao added that the flooding that once disrupted her fish drying business no longer affects her as much.\n\nMayor Christian Natividad hopes that the Pamarawan project can serve as a model for other flood-prone areas, urging local assessment and emphasizing that such measures should complement conventional flood defenses. The ultimate test for residents, however, will be whether their houses remain standing when typhoons and monsoon rains strike.",
  "summary": "For years, residents of a flood-prone Philippine island north of Manila have elevated their homes atop layer upon layer of concrete, only to see floodwaters threaten them again.",
  "key_points": [
    "Pamarawan Island uses bamboo and oyster shells to combat rising seas",
    "Nature-based solutions cost less than concrete flood-control projects",
    "Project aims to reduce wave impact and support mangrove growth"
  ],
  "editors_take": "Prioritizing biological barriers over expensive concrete dikes offers a cheaper, more sustainable alternative for coastal communities seeking to mitigate storm surges while actively restoring local marine ecosystems.",
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}