Youth Help Map Flood Adaptation Strategies in Vulnerable River Basin

Flooding is becoming a more complex threat across Southeast Asia as climate change alters not only the amount of rain that falls, but also the intensity and timing of extreme rainfall. In Malaysia’s Tiram River Basin, Johor, researchers have tested an unconventional response: inviting high school students to help map flood risks and design adaptation strategies. The study, published in Environmental Management, suggests that young people can contribute meaningfully to technical discussions normally dominated by engineers, planners and government agencies. Through workshops combining climate education, questionnaires and collaborative mapping, the students transformed abstract flood science into locally grounded proposals for safer infrastructure, ecosystem restoration and smarter warning systems.

The Tiram River Basin, or TRB, is a vulnerable catchment where low-lying settlements and urban development intersect with river channels and drainage networks. In such environments, flooding is shaped by several interacting processes. Heavy rainfall can rapidly increase runoff, while paved surfaces prevent water from infiltrating into the soil. When drainage systems are overwhelmed, water accumulates in streets and built-up areas. River-adjacent communities face additional danger when rising channel levels restrict the ability of urban drains to discharge. The researchers placed these physical processes within the wider context of long-term rainfall observations, which indicate a shift toward more moderate and heavy rainfall events in the region. That trend raises the importance of adaptation strategies that combine engineering with land-use planning, ecological protection and community preparedness.

Rather than treating students as passive recipients of disaster information, the research team positioned them as participants in a co-adaptation process. Co-adaptation refers to the development of responses through interaction between environmental conditions and human decision-making. In flood management, this can mean bringing scientific information together with local observations, social priorities and practical knowledge about how communities move, shelter and respond during emergencies. The students took part in structured group activities that included presentations on resilience, pre- and post-questionnaires, discussions of flood concepts and spatial mapping exercises. The approach was designed to measure both what participants learned individually and how effectively they worked together to solve a shared problem.

The educational intervention produced a striking change in the students’ understanding of flooding. Before the activities, only 24.6 percent of responses showed what the researchers considered correct conceptual alignment with flood risk. Some participants appeared to interpret flooding primarily as an urban problem, focusing on city streets and built structures while overlooking the influence of river systems, elevation, land cover and catchment-wide water movement. After the intervention, correct conceptual alignment rose to 100 percent, while the urban-only misconception fell to zero. The change was statistically significant, with a reported probability value below 0.001, indicating that the improvement was unlikely to be explained by random variation alone within the study’s assessment framework.

The mapping sessions also revealed how quickly technical ideas can become more useful when participants are asked to apply them to recognizable places. Student groups identified public infrastructure as comparatively safe zones, while marking low-lying areas close to the river as high-risk regions. These judgments reflect basic principles of flood-hazard mapping. Areas at lower elevation generally have less gravitational capacity to drain water, and locations beside rivers are more exposed when channels overtop their banks or when intense rainfall produces rapid upstream flows. Public buildings may offer stronger construction, elevated floors, wider access routes or designated emergency functions, although their actual safety would still need to be verified through formal hazard modelling, structural assessment and emergency planning.

The students’ priorities extended beyond conventional concrete barriers and drainage expansion. Their proposals included green and social adaptation measures alongside technological systems. Green strategies can include wetlands, vegetated drainage corridors, rain gardens, permeable surfaces and the preservation or restoration of floodplain areas. These interventions slow runoff, increase infiltration and create temporary storage for excess water. They do not eliminate flood risk, especially during exceptionally intense storms, but they can reduce the speed and volume of water entering drainage networks. Social strategies include public education, evacuation planning, community coordination and clearer communication before and during an event. Together, these measures represent a shift from relying exclusively on hard infrastructure toward a layered resilience model.

Technology formed another important part of the students’ proposed solutions. Internet of Things, or IoT, sensors could measure water levels, rainfall, flow velocity or drainage conditions in real time. Such devices can transmit readings to a central platform, allowing authorities to detect rapidly changing conditions and issue warnings before floodwaters reach critical levels. Geographic Information Systems, known as GIS, can combine sensor data with maps of elevation, roads, buildings, land use, population and evacuation facilities. When updated continuously, a GIS platform can help identify which routes may become inaccessible, which neighbourhoods are most exposed and where emergency resources should be positioned. The students’ suggestions therefore connected classroom learning with technologies already being developed for modern flood monitoring and early-warning systems.

The researchers found that the quality of group interaction was closely associated with participation. Group performance showed a strong positive correlation between participation and collaboration, reported as r = 0.85 with p < 0.001. In practical terms, the finding suggests that students who engaged more actively were also more likely to contribute to collective problem-solving. Collaboration matters in flood adaptation because no single person or discipline possesses all the information needed to manage a basin. Hydrologists may understand rainfall-runoff processes, planners may know development patterns, emergency officials may understand evacuation constraints, and residents may recognize local flooding pathways that do not appear in official maps. Participatory exercises can help these different forms of knowledge meet, provided that the process is carefully facilitated and technical conclusions are subsequently validated.

The study’s wider significance lies in its argument that youth engagement should be treated as a component of climate governance rather than merely an educational supplement. Young people will live longest with the consequences of today’s infrastructure and land-use decisions, yet they are often excluded from formal planning processes. Involving them can strengthen spatial literacy, critical thinking and confidence in interpreting climate information. It can also create links between schools, families and local authorities, allowing flood knowledge to move beyond the classroom. The authors describe the TRB project as a scalable template for inclusive, bottom-up adaptation planning. Its findings do not prove that student maps can replace hydrological models or official risk assessments. Instead, they show that participatory mapping can help communities understand those assessments, question assumptions and identify priorities that technical analyses alone may overlook.

For the Tiram River Basin, the next challenge is converting the students’ ideas into tested and funded action. Sensors require maintenance, communications networks and clear responsibility for interpreting alerts. Green infrastructure needs suitable land, long-term management and protection from competing development pressures. Safe-zone designations must be checked against detailed flood-depth and evacuation-time calculations, while public awareness campaigns must account for language, accessibility and the needs of vulnerable groups. The research provides an encouraging demonstration that young citizens can participate in this process with measurable gains in knowledge and collaboration. As extreme rainfall becomes more consequential, flood resilience may depend not only on larger drains or higher walls, but also on whether communities can combine scientific evidence, digital tools, ecological solutions and shared decision-making before the next storm arrives.