We developed and parameterized a near-‐real time flood extent monitoring model for Marikina River, Philippines using the Hydrologic Engineering Center – River Analysis System (HEC RAS). The development consisted of three major steps: flood model setup, flood model automation, and online visualization. The HEC RAS model was configured to accept real time 10-‐minute water level data from the Enhanced Flood Control and Operation Warning System (EFCOS) monitoring stations along the Marikina River as model boundary conditions. Automation scripts were used to convert the time series of water level data from the stations to a format that could be readily used by the HEC RAS model. An automation script was also developed for running the HEC RAS modeling workflow without human intervention such as assigning of model initial and boundary conditions, setting o
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