Author(s): Diana Beltran-Huertas; Nestor Mancipe-Munoz; John Sandoval-Barrera; Maria Fernanda Riano-Neira

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Keywords: Sensors, monitoring, management strategies in urban water and wastewater systems

Abstract: The increase of impermeable surfaces on urban areas generates issues related to urban runoff quality and quantity. Over the last decade, the use of sustainable urban drainage systems (SUDS) has been proposed to mitigate these issues by the water utility and the environmental authority in Bogotá-Colombia. Since 2017, several universities and the local government have been developing strategies to implement SUDS throughout the public space of the city and have regulated their design. However, there is not a rigorous assessment related to selecting location of SUDS in private area, their impact on the sewer system and the monitoring of runoff quantity and quality from SUDS. The Bogota campus of Universidad Nacional de Colombia is selected as a representative area of Bogota given its similarities in land uses and coverages to assess the hydrological and environmental impact of SUDS using urban runoff models and monitoring data. The methodology is divided in four stages [1] Identify SUDS typologies that could be implemented in the campus by their physical characteristics (e.g. available space for the structures, soil type, runoff quality). A land use and coverage assessment is done using ArcGIS to identify the surfaces where SUDS may be implemented. A water quality analysis of runoff is done by monitoring parameters such as turbidity, pH, Al, Cl, Cu, Cd, NH₄⁺, alkalinity, acidity, conductivity for different rain events [2] An automated monitoring system is designed to measure hydro-meteorological parameters on real-time basis using internet of things (IoT). The automated system has two pluviometers and two flow sensors connected to an embedded system for measuring precipitation and flowrate. [3] An urban rainfall-runoff model is used to identify the best location for implementing SUDS. The information utilized as input for the model is acquired through remote sensors and the monitoring system of the second stage. [4] Finally, the hydrological and environmental impacts of the implementing SUDS is estimated creating different SUDS scenarios on the campus through the urban runoff model. Three main results are expected from this investigation: [1] A methodology of selection and location of different SUDS typologies to manage runoff based on GIS tools, remote sensors products and the physical characterization of the campus, [2] A calibrated and validated urban rainfall-runoff model for the campus as a tool to assess SUDS designs performance for decision-making in future infrastructure development plans and [3] Implement an automated hydro-meteorological monitoring system on the campus using IoT technologies.

DOI: https://doi.org/10.3850/IAHR-39WC252171192022SS1033

Year: 2022