Optimizing Sensor Placement in Urban Storm Sewers: A Data-Driven Sparse Sensing Approach

• URL: http://arxiv.org/abs/2511.04556v1
• Date: Thu, 06 Nov 2025 17:08:19 GMT
• Title: Optimizing Sensor Placement in Urban Storm Sewers: A Data-Driven Sparse Sensing Approach
• Authors: Zihang Ding, Kun Zhang,
• Abstract summary: This study presents a data-driven sparse sensing framework, integrated with EPA-SWMM, to optimize sensor placement and reconstruct peak flowrates in a stormwater system.<n>The framework balances computational efficiency and physical interpretability, enabling high-accuracy flow reconstruction with minimal sensors.
• Score: 7.621053603127609
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Urban surface water flooding, triggered by intense rainfall overwhelming drainage systems, is increasingly frequent and widespread. While flood prediction and monitoring in high spatial-temporal resolution are desired, practical constraints in time, budget, and technology hinder its full implementation. How to monitor urban drainage networks and predict flow conditions under constrained resource is a major challenge. This study presents a data-driven sparse sensing (DSS) framework, integrated with EPA-SWMM, to optimize sensor placement and reconstruct peak flowrates in a stormwater system, using the Woodland Avenue catchment in Duluth, Minnesota, as a case study. We utilized a SWMM model to generate a training dataset of peak flowrate profiles across the stormwater network. Furthermore, we applied DSS - leveraging singular value decomposition for dimensionality reduction and QR factorization for sensor allocation - to identify the optimal monitoring nodes based on the simulated training dataset. We then validated the representativeness of these identified monitoring nodes by comparing the DSS-reconstructed peak flowrate profiles with those obtained from SWMM. Three optimally placed sensors among 77 nodes achieved satisfactory reconstruction performance with Nash-Sutcliffe Efficiency (NSE) values of 0.92-0.95 (25th to 75th percentiles). In addition, the model showed good robustness to uncertainty in measurements. Its robustness to sensor failures is location-dependent and improves with the number of sensors deployed. The framework balances computational efficiency and physical interpretability, enabling high-accuracy flow reconstruction with minimal sensors. This DSS framework can be further integrated with predictive models to realize flood early warning and real-time control under limited sensing and monitoring resource.

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