Dilution of sewage in Flanders mapped with mathematical and tracer methods

Dirckx, Geert; Bixio, D.; Thoeye, C.; Gueldre, G. De; Steene, B. Van De

doi:10.1080/15730620802541615

Cited by 22 publications

(19 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…water concentrations leads to a lower pollutant removal efficiency and additional cost for the 372 wastewater treatment plants. A quantitative assessment reveals that in 108 of the 194 investigated catchments in Belgium, more than 50% of the dry-weather sewer flow is due to groundwater infiltration 374 or 'parasitic water' (Dirckx et al, 2009). Similarly in Germany, Weiß et al (2002) state that on average 375 70% of treated water is originally non-polluted.…”

Section: Depression Storage Overland Flow and Runoff 238mentioning

confidence: 99%

Hydrological modelling of urbanized catchments: A review and future directions

Salvadore

Bronders

Batelaan

2015

Journal of Hydrology

377

248

View full text Add to dashboard Cite

Section: Depression Storage Overland Flow and Runoff 238mentioning

confidence: 99%

Hydrological modelling of urbanized catchments: A review and future directions

Salvadore

Bronders

Batelaan

2015

Journal of Hydrology

377

248

View full text Add to dashboard Cite

“…Locating and quantifying infiltration to sewer systems is a field of research in itself, and several authors have studied several physical techniques, e.g. flow and water level measurements, isotope information (Kracht et al ., ; Dirckx et al ., ), pollutant loads (Kracht and Gujer, ), and closed circuit television (Harris and Dobson, ) to quantify groundwater infiltration; other authors use different statistical or water‐balance approaches combined with simple empirical/physical models to estimate the fractions of extraneous water (Franz and Krebs, ; Wittenberg and Aksoy, ; Karpf and Krebs, ; Staufer et al ., ). De Benedittis and Krajewski () have provided careful review of different techniques for estimating infiltration.…”

Section: Introductionmentioning

confidence: 99%

Analysis and integrated modelling of groundwater infiltration to sewer networks

Thorndahl

Balling

Larsen³

2016

Hydrological Processes

View full text Add to dashboard Cite

Infiltration of groundwater to sewer systems is a problem for the capacity of the system as well as for treatment processes at waste water treatment plants. This paper quantifies the infiltration of groundwater to a sewer system in Frederikshavn Municipality, Denmark, by measurements of sewer flow and novel model set‐up, which simulates the interaction between groundwater and sewer flow. The study area has a separate waste water sewer system, but the discharged volumes from the system are approximately twice the volumes from a tight system without infiltration. The model set‐up makes use of two commercial models: mike she for simulation of groundwater transport and mike urban (mouse) [DHI, Hørsholm, Denmark] for simulation of sewer flow. By simulating the groundwater level and calibrating infiltration coefficients against sewer flow measurements, it has been possible to estimate the average infiltration to the sewer system with satisfying results. The infiltration processes are indeed complicated and to a large degree heterogeneous throughout the sewer system. The paper shows contribution from both saturated and unsaturated groundwater zones, which makes the modelling process complex. Copyright © 2016 John Wiley & Sons, Ltd.

show abstract

“…Hence, it was anticipated that the calculation of CW roughness using dry-weather flow measurements would not be an overestimation in this particular case. Dirckx et al (2009) reported a threshold of the 70th percentile to identify the number of rain days through a standardized cumulative curve of daily inflow. The rain days were described as the days with a surface runoff contribution.…”

Section: Colebrook-white Roughness (K S )mentioning

confidence: 99%

Quantifying Uncertainty in Simulation of Sewer Overflow Volume

et al. 2018

View full text Add to dashboard Cite

Environmental regulators frequently stipulate the modeling approaches required for water utilities managing sewer networks to demonstrate regulatory compliance. The performance of drainage systems with regard to combined sewer overflow (CSO) discharges is required to be assessed using urban drainage models to prove compliance before large investments can be authorized. However, as far as the authors are aware, the modeling approaches to demonstrate regulatory compliance currently provide no opportunity for considering model uncertainty. This paper therefore addresses a knowledge gap in the role of model uncertainty in environmental compliance studies by describing an objective uncertainty quantification process that enables the water utilities to evaluate and report the uncertainty in their modeling predictions and that is also transparent enough to satisfy regulators. The sewer network was modeled in InfoWorks CS software using a design storm defined by the regulator to test the performance of CSOs. Uncertainty in the model and input parameters was propagated using Monte Carlo simulations with Latin hypercube sampling, and the results were presented to show the trade-off between the infrastructure investment and the risk of spilling.

show abstract

Dilution of sewage in Flanders mapped with mathematical and tracer methods

Cited by 22 publications

References 2 publications

Hydrological modelling of urbanized catchments: A review and future directions

Hydrological modelling of urbanized catchments: A review and future directions

Analysis and integrated modelling of groundwater infiltration to sewer networks

Quantifying Uncertainty in Simulation of Sewer Overflow Volume

Contact Info

Product

Resources

About