Traditionally, urban hydrology (and hydraulics) has often focused on very short (≤1 h) intensive rain and central city centers with a very large proportion of hard-cast surfaces. However, recently studies have shown that severe floods require longer rain (eg 2-4 h) and contribution to drainage also from permeable (but water-saturated) surfaces. There is an increased need for R & D in the border between traditional urban and traditional rural (ie in pure natural land) hydrology. This R & D includes, for example, analysis of precipitation processes on different scales, and its connection to various urban hydrological risks, as well as the development of tools and results for urban hydrological risk assessment with both maps (forecasts for the next days) and long (climate projections) time horizons.
Research and Development questions
- How are precipitation processes on different scales connected to urban hydrological risk and adaptation?
- How can high hydrological simulation and forecasting be developed to better support urban hydrological risk assessment?
- How will urban hydrological risks be affected by climate change?