OH test

Food data for the River Wey and Wey navigation for Byfleet area 2018.

The simulation is based on a digital elevation model (DEM) with a spatial resolution of 25 x 25 meters. The Weyriver is “burned” into the DEM by adding a border around it. This is done in order to replicate the actual conditions, where surface runoff in the inner city, due to the city’s flood defenses, is prevented from draining directly into the river. Hence drainage to the river can only occur via the urban drainage system. Outside of the city center this may not be so however this is not currently included in the model. The extent of impervious surfaces (IS) is very influential on the runoff in cities. The present analysis of IS for Budapest has been inspired by Kaspersen et al. (2015), where a regression modelling approach has been applied in order to convert Soil Adjusted Vegetation Index (SAVI) values to IS fractions.