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IWRM decision support with material flow analysis: consideration of urban system input.
T A Terekhanova1, B Helm, J Traenckner
1Institute for Urban Water Management, Technische Universität Dresden, Dresden, Germany. Tatyana.Terekhanova@mailbox.tu-dresden.de
Summary
Material flow analysis (MFA) tools face challenges in quantifying urban water systems due to data gaps and model limitations. Careful selection of calculation methods can significantly reduce deviations in modeling results.
Area of Science:
- Environmental Science
- Urban Hydrology
- Systems Analysis
Background:
- Material Flow Analysis (MFA) is crucial for understanding urban water systems.
- Existing MFA tools and case studies reveal significant quantification deficits.
- Reliable input quantification for urban water systems remains a challenge.
Purpose of the Study:
- To review and compare approximately 20 Material Flow Analysis tools.
- To identify principal complications in quantifying inputs for urban water systems.
- To provide criteria and suggestions for designing adapted quantification procedures.
Main Methods:
- Review of existing literature on Material Flow Analysis tools.
- Comparison of case studies utilizing MFA.
- Analysis of approximately 20 static and semi-empirical MFA models.
- Evaluation of quantification procedures within these models.
Main Results:
- Identified deficits in current MFA quantification approaches.
- Key complications include insufficient data for model validation (e.g., combined sewer overflow (CSO) discharges).
- Necessity for quantifying diffuse sources to verify basin-scale modeling results.
- Contradictions arise when using static MFA models for dynamic urban systems.
Conclusions:
- A wise selection of calculation procedures, considering system characteristics and data availability, can minimize model deviations.
- Adapted quantification procedures are essential for reliable MFA in urban water systems.
- The study offers criteria and suggestions for developing such procedures.
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