Sediment and pollutant load modelling using an integrated urban drainage modelling toolbox: an application of City Drain

2010 ◽  
Vol 61 (9) ◽  
pp. 2273-2282 ◽  
Author(s):  
J. P. Rodríguez ◽  
S. Achleitner ◽  
M. Möderl ◽  
W. Rauch ◽  
Č. Maksimović ◽  
...  
Keyword(s):  
Computational Modelling ◽  
Integrated Modelling ◽  
Research Centre ◽  
Urban Drainage ◽  
Rainfall Events ◽  
Drainage Systems ◽  
Engineering Research ◽  
Planning And Design ◽  
Urban Drainage Systems ◽  
Accumulation Of Pollutants

Numerical and computational modelling of flow and pollutant dynamics in urban drainage systems is becoming more and more integral to planning and design. The main aim of integrated flow and pollutant models is to quantify the efficiency of different measures at reducing the amount of pollutants discharged into receiving water bodies and minimise the consequent negative water quality impact. The open source toolbox CITY DRAIN developed in the Matlab/Simulink© environment, which was designed for integrated modelling of urban drainage systems, is used in this work. The goal in this study was to implement and test computational routines for representing sediment and pollutant loads in order to evaluate catchment surface pollution. Tested models estimate the accumulation, erosion and transport of pollutants—aggregately—on urban surfaces and in sewers. The toolbox now includes mathematical formulations for accumulation of pollutants during dry weather period and their wash-off during rainfall events. The experimental data acquired in a previous research project carried out by the Environmental Engineering Research Centre (CIIA) at the Universidad de los Andes in Bogotá (Colombia) was used for the calibration of the models. Different numerical approaches were tested for their ability to calibrate to the sediment transport conditions. Initial results indicate, when there is more than one peak during the rainfall event duration, wash-off processes probably can be better represented using a model based on the flow instead of the rainfall intensity. Additionally, it was observed that using more detailed models (compared with an instantaneous approach) for representing pollutant accumulation do not necessarily lead to better results.

Assessment of urban flooding by dual drainage simulation model RisUrSim

2005 ◽  
Vol 52 (5) ◽  
pp. 257-264 ◽  
Author(s):  
T.G. Schmitt ◽  
M. Thomas ◽  
N. Ettrich
Keyword(s):  
Simulation Model ◽  
Surface Flow ◽  
Water Levels ◽  
Model Verification ◽  
Urban Drainage ◽  
Urban Flooding ◽  
Insurance Company ◽  
Drainage Systems ◽  
Engineering Research ◽  
Urban Drainage Systems

The European research project in the EUREKA framework, RisUrSim is presented with its overall objective to develop an integrated planning tool to allow cost effective management for urban drainage systems. The project consortium consisted of industrial mathematics and water engineering research institutes, municipal drainage works as well as an insurance company. The paper relates to the regulatory background of European Standard EN 752 and the need of a more detailed methodology to simulate urban flooding. The analysis of urban flooding caused by surcharged sewers in urban drainage systems leads to the necessity of a dual drainage modeling. A detailed dual drainage simulation model is described based upon hydraulic flow routing procedures for surface flow and pipe flow. Special consideration is given to the interaction between surface and sewer flow during surcharge conditions in order to most accurately compute water levels above ground as a basis for further assessments of possible damage costs. The model application is presented for a small case study in terms of data needs, model verification and first simulation results.

Accounting for sensor calibration, concentration heterogeneity, measurement and sampling uncertainties in monitoring urban drainage systems

2003 ◽  
Vol 47 (2) ◽  
pp. 95-102 ◽  
Author(s):  
J.-L. Bertrand-Krajewski ◽  
J.-P. Bardin ◽  
M. Mourad ◽  
Y. Béranger
Keyword(s):  
Performance Indicator ◽  
Sensor Calibration ◽  
Urban Drainage ◽  
Experimental Conditions ◽  
Flow Rates ◽  
Rainfall Events ◽  
Drainage Systems ◽  
Methods And Techniques ◽  
Urban Drainage Systems ◽  
Online Measurements

Assessing the functioning and the performance of urban drainage systems on both rainfall event and yearly time scales is usually based on online measurements of flow rates and on samples of influent and effluent for some rainfall events per year. In order to draw pertinent scientific and operational conclusions from the measurement results, it is absolutely necessary to use appropriate methods and techniques in order to i) calibrate sensors and analytical methods, ii) validate raw data, iii) evaluate measurement uncertainties, iv) evaluate the number of rainfall events to sample per year in order to determine performance indicator with a given uncertainty. Based on previous work, the paper gives a synthetic review of required methods and techniques, and illustrates their application to storage and settling tanks. Experiments show that, despite controlled and careful experimental conditions, relative uncertainties are about 20% for flow rates in sewer pipes, 6-10% for volumes, 25-35% for TSS concentrations and loads, and 18-276% for TSS removal rates. In order to evaluate the annual pollutant interception efficiency of storage and settling tanks with a given uncertainty, efforts should first be devoted to decrease the sampling uncertainty by increasing the number of sampled events.

A planning framework for sustainable urban drainage systems

Water Policy ◽  
2012 ◽  
Vol 14 (5) ◽  
pp. 865-886 ◽  
Author(s):  
Ole Fryd ◽  
Torben Dam ◽  
Marina Bergen Jensen
Keyword(s):  
Urban Drainage ◽  
Integrated Planning ◽  
Drainage Systems ◽  
Spatial Strategies ◽  
Planning And Design ◽  
Time Space ◽  
Planning Framework ◽  
The Social ◽  
Biophysical Processes ◽  
Urban Drainage Systems

Sustainable urban drainage systems (SUDS) call for collaborative and interdisciplinary practices. The problem with this is the social and technical complexities involved, and the absence of a shared understanding of the challenge and the scope of integrated solutions. It is necessary to clarify the contributions and interactions between disciplines in order to achieve integrated planning and design of SUDS. This paper reviews the literature across disciplinary fields and outlines key messages and uncertainties within each discipline. The outcome is a framework comprising time, space and human values, as well as biophysical processes (e.g. engineering), spatial strategies (e.g. urban design) and adaptive strategies (e.g. management). It identifies the planning of SUDS as a collective learning process with continuous iterations between disciplines, while also reflecting the past, present and future of a specific site.

Urban Drainage Systems: Design and Operation

1993 ◽  
Vol 27 (12) ◽  
pp. 31-70 ◽  
Author(s):  
J. Marsalek ◽  
T. O. Barnwell ◽  
W. Geiger ◽  
M. Grottker ◽  
W. C. Huber ◽  
...  
Keyword(s):  
Sewage Treatment ◽  
Systems Design ◽  
Urban Drainage ◽  
Sewer System ◽  
Drainage Systems ◽  
Planning And Design ◽  
Sewer Systems ◽  
Combined Sewer ◽  
Urban Drainage Systems ◽  
Receiving Waters

Design and operation of urban drainage systems are addressed in the context of the urban water system comprising drainage, sewage treatment plants and receiving waters. The planning and design of storm sewers are reviewed with reference to planning objectives, design objectives, flows and pollutant loads, sewer system structures and urban runoff control and treatment. The discussion of combined sewers focuses on hydraulic design of combined sewer systems, including combined sewer overflow (CSO) structures, and the use of CSO structures and storage in control of CSOs. The section on operation of sewer systems focuses on real time control, its feasibility, planning, design, operation and applications. Sewer system planning and design are generally conducted using computer modelling tools and procedures which are reviewed in the last section. A brief listing of selected models focuses on internationally used models. Finally, it was concluded that further improvements in environmental and ecological protection of urban waters is feasible only by consideration of urban drainage systems in conjunctions with sewage treatment and water quality in the receiving waters.

Urban drainage system planning and design – challenges with climate change and urbanization: a review

2015 ◽  
Vol 72 (2) ◽  
pp. 165-179 ◽  
Author(s):  
Zeinab Yazdanfar ◽  
Ashok Sharma
Keyword(s):  
Climate Change ◽  
Drainage System ◽  
Cost Effective ◽  
Local Area ◽  
Urban Drainage ◽  
Rapid Urbanization ◽  
Drainage Systems ◽  
Planning And Design ◽  
Urban Drainage Systems ◽  
Fit For Purpose

Urban drainage systems are in general failing in their functions mainly due to non-stationary climate and rapid urbanization. As these systems are becoming less efficient, issues such as sewer overflows and increase in urban flooding leading to surge in pollutant loads to receiving water bodies are becoming pervasive rapidly. A comprehensive investigation is required to understand these factors impacting the functioning of urban drainage, which vary spatially and temporally and are more complex when weaving together. It is necessary to establish a cost-effective, integrated planning and design framework for every local area by incorporating fit for purpose alternatives. Carefully selected adaptive measures are required for the provision of sustainable drainage systems to meet combined challenges of climate change and urbanization. This paper reviews challenges associated with urban drainage systems and explores limitations and potentials of different adaptation alternatives. It is hoped that the paper would provide drainage engineers, water planners, and decision makers with the state of the art information and technologies regarding adaptation options to increase drainage systems efficiency under changing climate and urbanization.

scholarly journals Urban Flood Risk and Economic Viability Analyses of a Smart Sustainable Drainage System

2021 ◽  
Vol 13 (24) ◽  
pp. 13889
Author(s):  
Helena M. Ramos ◽  
Mohsen Besharat
Keyword(s):  
Flood Risk ◽  
Computational Modelling ◽  
Economic Viability ◽  
Urban Drainage ◽  
Accurate Analysis ◽  
Rapid Urbanization ◽  
Protection Measures ◽  
Urban Flood ◽  
Drainage Systems ◽  
Urban Drainage Systems

Urban drainage systems are in transition from functioning simply as a transport system to becoming an important element of urban flood protection measures providing considerable influence on urban infrastructure sustainability. Rapid urbanization combined with the implications of climate change is one of the major emerging challenges. The increased concerns with water security and the ageing of existing drainage infrastructure are new challenges in improving urban water management. This study carried out in the Seixal area in Portugal examines flood risk analyses and mitigation techniques performed by computational modelling using MIKE SHE from the Danish Hydraulic Institute (DHI). Several scenarios were compared regarding flood risk and sustainable urban drainage systems (SuDS) efficiency. To obtain a more accurate analysis, the economic viability of each technique was analyzed as well through (i) life cost analysis and (ii) taking into account the damages caused by a certain type of flood. The results present that the best scenario is the one that will minimize the effects of great urbanization and consequently the flood risk, which combines two different measures: permeable pavement and detention basin. This alternative allows us to fully explore the mitigation capacity of each viable technique, demonstrating a very important improvement in the flood mitigation system in Seixal.

scholarly journals Probabilistic Modelling of Sustainable Urban Drainage Systems

2022 ◽  
Author(s):  
Anita Raimondi ◽  
Maria Gloria Di Chiano ◽  
Mariana Marchioni ◽  
Umberto Sanfilippo ◽  
Gianfranco Becciu
Keyword(s):  
Control Systems ◽  
Probabilistic Approach ◽  
Urban Drainage ◽  
Rainfall Events ◽  
Drainage Systems ◽  
Effective Strategies ◽  
Urban Drainage Systems ◽  
Rainwater Management ◽  
A Chain ◽  
And Control

Abstract Sustainable Urban Drainage Systems (SuDS) gatherer effective strategies and control systems for stormwater management especially in highly urbanized areas characterized by large impervious surfaces that increase runoff peak flow and volume. The main goal is to restore the natural water balance by increasing infiltration, evapotranspiration and promoting rainwater reuse. This paper proposes an analytical probabilistic approach for the modelling SuDS applicable to different structures and goals. Developed equations allow to estimate the probability of overflow and the probability of pre-filling at the end of dry periods, to evaluate the efficiency of the storage in rainwater management and its ability to empty between consecutive events. A great advantage of the proposed method is that it allows to consider a chain of rainfall events; this aspect is particularly important for control systems SuDS characterized by low outflow rates which storage capacity is often not completely available at the end of a dry period because pre-filled by previous events. Suggested formulas were tested to two cases studies in Milan and Genoa, Italy.

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