NORDIWA 2023

Hosseini, H. (Presenter)
Hashemi, H. (Role not specified)
Larsson, R. (Role not specified)
Olsson, J. (Role not specified)
Aspegren, H. (Role not specified)
Berndtsson, R. (Role not specified)

Activity: Participating in or organising an event › Participation in conference

Description

Hasan Hosseini gave an oral presentation of the abstract "Swedish new radar system for enhanced urban stormwater management" on behalf of the listed authors.

Period	2023 Sept 5 → 2023 Sept 7
Event type	Conference
Location	Göteborg, SwedenShow on map
Degree of Recognition	International

Free keywords

X-band weather radar
Micro Rain Radar (MRR)
Atmospheric melting layer

Documents & Links

Abstract title: Swedish new radar system for enhanced urban stormwater management ----------- Abstract text: More frequent torrential downpours and pluvial floods with climate change threaten the liveability of cities globally. Urbanization and densification of cities exacerbate the situation by more contribution and exposure to runoff. It is not only excess runoff but also more polluted water, e.g., from combined sewer overflows, that needs to be dealt with to avoid larger socio-economic and environmental losses than the present. However, spatiotemporal precipitation, especially for extreme events, can be highly variable and challenging to predict. Thus, high-resolution rainfall observations across time and area are becoming essential to managing stormwater flooding. The need is further emphasized for required less uncertainty in the prediction and control of peak flows in heterogenous urban catchments with dominant impervious surfaces. Both historical data and accurate nowcasting of local rainstorms are crucial for the design and real-time operation of many flood protection facilities, from pumping stations to nature-based solutions, or, when, e.g., certain parking lots and sports fields must be evacuated for collecting flood water as a secondary function. Other benefits can also be mentioned such as rainwater harvesting, design and maintenance of green roofs, and creation of innovative blue-green environments such as those in Gothenburg’s plan of becoming the world’s best “rainy city”. In view of the above, sub-km and minute rainfall observations were initiated through two operational ground-based scanning X-band weather radars (WRs) in south Sweden (Figure 1, and Hosseini et al., 2023). Although these resolutions are unique (vs. traditional rain gauges that are tedious and expensive to maintain), the remotely sensed data require extensive verifications and corrections. This study introduces the recent efforts in Sweden in this direction, which, for example, includes merging data from multiple-level scans of two X-band WRs using artificial neural networks. Also, a Micro Rain Radar (MRR) is analyzed for real-time correction of the X-band WRs. MRR more continuously (every 10 sec) monitors the vertical profile of rainfall to detect, among other things, hydrometeors’ melting layer, which can introduce considerable errors in the WRs scanning at certain elevation angles of the antenna. Although the technologies and research are mainly focused on Skåne, the developed methods can be generalized to other areas. The methods building on Artificial Intelligence (AI) solutions, e.g., can be expanded to other regions of Sweden or internationally to advocate consistent strategies towards more reliable flood protection of cities via new radar intelligence.

NORDIWA 2023

Description

Free keywords

Documents & Links

Related content

Research output

Merging dual-polarization X-band radar network intelligence for improved microscale observation of summer rainfall in south Sweden

Evaluation of a new X-band weather radar for operational use in south Sweden