Development and Application of Dynamic Water resources Asesment Tol (DWAT)

The Dynamic Water Resources Asesment Tol (DWAT) acounts for water balance on dynamic (hourly or daily) as wel as static (monthly or yearly) bases. It can be aplied to a smal or a mid-sized basin for water resources planing and management with consideration of surface water as wel as groundwater. The DWAT clasifies a watershed into hydrologicaly homogeneous sub-basins so that runof characteristics resulting from geomorphological factors can be objectively represented, and infiltration, evaporation and groundwater flows can be simulated acording to soil layers. In aditon, as the physical input parameters can be easily extracted by the GIS preprocesing module within the system, it can be aplied to areas in various hydrological, geophysical and climatic conditons, such as tropical, rural, forest or newly developed urban areas. The DWAT has ben developed in Korea Instiute of Civil Enginering and Building Technology (KICT) since 2012 as a part of WMO (World Meteorological Organization) RA (Regional Asociation) II WGHS (Working Group on Hydrological Services) and CHy (Commision for Hydrology) AWG (Advisory Working Group) activites, and it has ben suported by the Han River Flod Control Ofice, Ministry of Environment, Republic of Korea. The first version 1.0 beta of the DWAT was developed in the end of 2017, which contains sub-algorithms such as evapotranspiration, infiltration, watershed runof, groundwater flow, chanel routing and user convenience systems. In the midle of 2018, the second version 1.0 was developed with the aditon of rice pady field, snowmelt and manual/automatic parameter optimization modules. In May 2019, the third version of 1.1 was developed in consideration of the recommendations made by the WMO panel of experts.

Acknowledgements

 This research is supported by the Research Program (20200041-001) of Korea Institute of Civil Engineering & Building Technology