Modelling of different measures for improving removal in a stormwater pond
Paper i proceeding, 2004

The effect on removal efficiency and hydraulic performance of retrofitting an existing pond was modelled using the commercial software Mike21 and compartmental modelling. The Mike21 model had previously been calibrated on the studied pond. Installation of baffles, the addition of culverts under a causeway and removal of an existing island were all studied as possible improvement measures in the pond. The subsequent effect on hydraulic performance and removal of suspended solids was then evaluated. Copper, cadmium, BOD, nitrogen and phosphorous removal were also investigated for the improvement measure showing the best results. Outcomes of this study reveal that all measures increase the removal efficiency of suspended solids. The hydraulic efficiency is improved for all cases, except for the case where the island is removed. Compartmental modelling was also used to evaluate hydraulic performance and facilitated a better understanding of the way each of the different measures affected the flow pattern and performance. It was concluded that the installation of baffles is the best of the studied measures resulting in a reduction in the annual load on the receiving lake by approximately 8,000 kg of suspended solids, 2 kg of copper and 600 kg of BOD.

retrofitting

compartmental modelling

removal efficiency

stormwater pond

numerical model

Författare

Jonas German

Chalmers, Institutionen för Vatten Miljö Transport, Urban Water Engineering

Ketah Jansons

Gilbert Svensson

Chalmers, Institutionen för Vatten Miljö Transport, Urban Water Engineering

Dick Karlsson

Lars-Göran Gustafsson

Proceedings of the 6th international conference on Urban Drainage Modelling

477-484

Ämneskategorier

Samhällsbyggnadsteknik