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http://dx.doi.org/10.17820/eri.2016.3.3.182

Establishment of Resilient Infrastructures for the Mitigation of an Urban Water Problem: 2. Robustness Assessment of Structural Alternatives for the Problems of Water Pollution  

Jung, Jihyeun (Department of Civil and Environmental Engineering, Seoul National University)
Lee, Changmin (Department of Civil and Environmental Engineering, Seoul National University)
An, Jinsung (Department of Civil and Environmental Engineering, Seoul National University)
Kim, Jae Young (Department of Civil and Environmental Engineering, Seoul National University)
Choi, Yongju (Department of Civil and Environmental Engineering, Seoul National University)
Publication Information
Ecology and Resilient Infrastructure / v.3, no.3, 2016 , pp. 182-188 More about this Journal
Abstract
This study evaluated structural alternatives for managing water quality problems by reinterpreting and then applying the robustness-cost index (RCI) for urban flood problems. Cases of endogenous hormone pollution in treated sewage and proliferation of protozoa in intake-water were chosen as representative examples because they have different types of regulation standards for the treatment. Current facilities and structural alternatives with robustness indices (RIs) greater than unity were determined to be robust. The RI was combined with the cost index (CI) to obtain the RCI values. For the endogenous hormone pollution in treated sewage, a human-oriented estrogen $17{\beta}$-estradiol was selected as a target pollutant. The RI and RCI values for a structural alternative, extension of the current sewage treatment facility for advanced treatment, were greater than the values for the current practice of conventional activated sludge process. For the intake-water pollution by protozoa, UV and ozone disinfection facilities were evaluated for inactivation of Cryptosporidium parvum. The RCI values for ozone disinfection were greater than those for UV disinfection. Based on the results and the logics involved in the calculation of RCI for water quality issues we studied, we proposed procedures for establishing and implementing structural alternatives for the restoration from and prevention of outbreaks of water quality problems.
Keywords
Resilience; Robustness-cost index; Structural alternative; Water quality problems;
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