Assessment and Improvement of the Non-structural Mitigation Flood Preemptive Protocol of Marikina City

摘要

Marikina City has a long history of problems with flooding, being the catch basin of rivers from nearby cities, the river overflows whenever there is excessive rain. From the year 2012 to 2018, a total of 31,978 families has evacuated in 19 typhoons. The city has aNon-structural mitigation flood protocol implemented to address flood risk and damages as well as to mitigate potential life loss through regulations and best management practices. However, the preemptive evacuation program cannot guarantee that all affected families can be evacuated on time. Currently, the evacuation time during pre-emptive evacuation exceeds the working hours of Marikina City by 3.25 hours. For this reason, the study aims to systematically review the flood management actions of Marikina City and its impact on the community through survey and historical data, identify the significant factors affecting the evacuation time, and subsequently improve its flood protocol system. Statistical analyses and transportation model were used to determine the (1) minimum travel time per family per trip, (2) required number of responders and vehicles per pick-up-point, (3) number of monitoring personnel needed per evacuation center, and (4) optimal allocation of the evacuees in the evacuation centers available. Lastly, Job descriptions and job specifications for every personnel involved, including work instruction manuals and standard operating procedures for specific and clear instructions of activities that have to be done during preemptive evacuation were recommended in this study.