Application of HEC-HMS for flood forecasting in hazara catchment Pakistan, south Asia

Floods have become more severe and frequent as a result of climate change around the world, posing hazard to public safety economic development. This study investigates use distributed hydrological models in flash flood risk management small watershed Hazara, Pakistan, with goal improving Pakistan's early warning lead time. First, HEC-HMS model was built using geographic data river network's structure, then calibrated verified eight high rainfall events from 2013. demonstrating that could simulate floods research area Second, given happened, this paper proposes an analysis approach for forecasting system, well criteria sending urban-stream alerts based on rainfall, order provide sufficient The DEMs (digital elevation models) regions were processed HEC-Geo HMS, ArcView GIS tool catchment delineation, terrain pre-processing, basin processing. previously observed data. proposed prediction reduction methodology is nonstructural. Hydrologic Modeling System (HEC-HMS), which provides time forecast computes runoff/stage threshold conditions, at heart application. For assessment, Pakistan Meteorological Department (PMD) entered into hydro-meteorological database HEC-HMS. A server-client application utilised visualise real-time scenario send out message. outcomes will be used develop validation measures Hazara stream deal potential floods.