Dynamization of Urban Runoff Pollution and Quantity

Water

Maike Beier¹  Katrin Bauerfeld²  Sören Hornig² 

[1] Institute of Sanitary Engineering and Waste Management (ISAH), Leibniz Universität Hannover, Welfengarten 1, 30167 Hannover, Germany;Institute of Sanitary and Environmental Engineering (ISWW), Technische Universität Braunschweig, Pockelsstr. 2a, 38106 Braunschweig, Germany;

关键词: stormwater;    runoff;    quality;    pollution;    dynamics;    quality-based drainage;   

DOI  :  10.3390/w14030418

来源: DOAJ

【 摘 要 】

At present, the annual loads from long-term series simulations are mostly used for the evaluation of rainwater management and treatment measures although the relevance of the temporal distribution of both pollution and quantity has a recognizable influence on the performance of the treatment. With the idea of dynamizing the simulation output values in relation to (i) single rainfall events, (ii) specific catchment characteristics, and (iii) the duration of the dry period between two rainfall events measurement devices and scenario studies were established in a joint research project in Lower Saxony. First measurement results of surface runoff qualities of an urban sub-catchment in Braunschweig/Germany are presented in a high temporal definition for several pollution parameters. A correlation analysis was performed identifying additional explanatory parameters that have an influence on the first flush effect, such as rainfall characteristics or antecedent dry period. First calculations of the possible reduction in the decentralized storm water treatment by disconnecting the first flush showed values of 42–65%, depending on the pollution parameters. The comparative evaluation of the data with different statistical methods shows that the uncertainties in the calculation of rainwater pollution, or the duration of the first flush, are still very high and do not yet allow researchers to derive a pollution forecast for, e.g., a throttle control solely from the recording of the rain and area characteristics.

【 授权许可】

Unknown