The Philippine National Hydrological Model is the first national-scale hydrological model of the Philippines. Its primary purpose is to quantify components of the hydrological cycle at the national level, with spatio-temporal patterns of precipitation, evapotranspiration, runoff and groundwater recharge as model outputs.
We have developed an integrated surface water-groundwater model based on the variable infiltration capacity (VIC) macro-scale hydrological model, into which we have added a one-layer, 2D lateral groundwater flow model. Groundwater recharge is derived from the interaction of the groundwater model with the VIC soil hydrology by allowing bi-directional exchange of water between the aquifer and the soil. The model is run at a 2 km grid resolution and is parameterised with and driven by globally available datasets describing the land surface, including soil properties and vegetation properties. The model outputs include:
- evapotranspiration
- runoff
- groundwater recharge
- baseflow
- groundwater levels
- soil moisture
Simulated median groundwater recharge from 1979 to 2018 from the soil to the aquifer aggregated to district levels and mean monthly averaged recharge. BGS © UKRI.
Comparison of simulated and observed streamflow across the Philippines. BGS © UKRI.
More information
More information about the Philippine National Hydrological Model is available in our summary report and model output can be viewed and downloaded via our dashboard. You can also read about the effect of climate change on the hydrological cycle within two regions of the Philippines.
Contact
For further information, please contact Dr Johanna Scheidegger.