Evaluation of sewer infiltration/inflow using COD mass flux method: case study in Prague
| Autor: | David Stránský, P. Sýkora, Vojtech Bares |
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| Rok vydání: | 2012 |
| Předmět: |
Time Factors
Environmental Engineering Water flow Sewage Hydrograph Waste Disposal Fluid Water Purification Water Supply Water Movements Computer Simulation Czech Republic Water Science and Technology Biological Oxygen Demand Analysis Hydrology Geography business.industry Chemical oxygen demand Infiltration/Inflow Models Chemical Wastewater Evaluation Studies as Topic Combined sewer business Monte Carlo Method Environmental Monitoring Waste disposal |
| Zdroj: | Water Science and Technology. 66:673-680 |
| ISSN: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2012.229 |
| Popis: | The combined sewer system of the City of Prague, similar to other relevant locations, is strongly affected by infiltrating waters. The knowledge of their volume is one of the important parameters with respect to sewer system operation, maintenance and reconstruction. The methodology is based on the variation of diurnal chemical oxygen demand (COD) load and continuous water quality monitoring using in-line absorption spectrometry. This approach allows the identification of individual components of the diurnal wastewater hydrograph, in particular the contribution of parasitic water flow to wastewater discharge. The statistical relevance was tested using Monte Carlo simulations on a 7-year data series of flow rate. The results show that application of this methodology provides specific relevant information about individual sub-catchments within an entire sewer system, particularly in terms of absolute and relative values of I/I and structural state indicators. Processing of long-term data series gives clear information about the significance of the monitoring period length for the relevance of obtained results. |
| Databáze: | OpenAIRE |
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