water distribution data Articles

Multivariate statistical analysis for water demand modelling: implementation, performance analysis, and comparison with the PRP model

Water demand is the driving force behind hydraulic dynamics in water distribution systems. Consequently, it is crucial to accurately estimate the actual water use to develop reliable simulation models. In this study, copula-based multivariate analysis was proposed and used for demand prediction for a given return period. The analysis was applied to water consumption data collected in the ...

Nov. 17, 2015

By IWA Publishing
Data reconstruction of flow time series in water distribution systems – a new method that accommodates multiple seasonality

The purpose of this paper is to present a simple yet highly effective method to reconstruct missing data in flow time series. The presence of missing values in network flow data severely restricts their use for an adequate management of billing systems and for network operation. Despite significant technology improvements, missing values are frequent due to metering, data acquisition and ...

Dec. 17, 2016

By IWA Publishing
Novelty detection for time series data analysis in water distribution systems using support vector machines

The sampling frequency and quantity of time series data collected from water distribution systems has been increasing in recent years, giving rise to the potential for improving system knowledge if suitable automated techniques can be applied, in particular, machine learning. Novelty (or anomaly) detection refers to the automatic identification of novel or abnormal patterns embedded in large ...

Oct. 1, 2011

By IWA Publishing
Progress on water data integration and distribution: a summary of select US Geological Survey data systems

Critical water-resources issues ranging from flood response to water scarcity make access to integrated water information, services, tools, and models essential. Since 1995 when the first water data web pages went online, the US Geological Survey has been at the forefront of water data distribution and integration. Today, real-time and historical streamflow observations are available via web ...

Jul. 31, 2015

By IWA Publishing
A simple forecast technique for estimating the statistical characteristics of water consumption

The forecast water consumption values are the most critical input data in the pump schedule optimization of water distribution systems. The aim of this paper is to present a simple technique which is able to estimate the mean consumption and its distribution for a given demand zone with an hourly resolution. Simplicity (low computational cost) is advantageous since the forecast model needs to ...

Aug. 6, 2014

By IWA Publishing
Impact of incomplete mixing in the prediction of chlorine residuals in municipal water distribution systems

This paper investigates the mixing phenomena in pipe junctions in water distribution systems. Network simulation models frequently assume that mixing at pipe junctions is complete and instantaneous. In the present study, a series of experiments using tee and cross junctions with varying inflows and free chlorine concentrations were carried out in the Hydraulic Laboratory of the Institute of ...

Jul. 10, 2015

By IWA Publishing
Hydrologic data as a human right? Equitable access to information as a resource for disaster risk reduction in transboundary river basins

Principles of equitable and reasonable use underpin international water agreements. Despite the potential for hydrologic information to enhance resilience to extreme events, comparable application of just principles to the distribution of hydrometeorological data is poorly established. Within the Ganges–Brahmaputra–Meghna (GBM) river basin, we find that water allocation agreements ...

Nov. 6, 2014

By IWA Publishing
Public participation: contributing to better water management

In the context of the EU Water Framework Directive (WFD), public participation (PP) is viewed as a means of improving water management through better planning and more informed decision-making. The active involvement of all interested parties and influencers in the deliberation and decision‑making process is generally expected to foster an environment of accessibility, receptiveness and ...

Oct. 24, 2014

By European Environment Agency (EEA)
Hydraulic characterization and transient response of pressure reducing valves: laboratory experiments

A pressure reducing valve (PRV) regulates the outlet pressure regardless of the fluctuating flow and varying inlet pressure, thereby reducing leakage and mitigating the stress on the downstream water distribution network (WDN). Notwithstanding the crucial importance of PRVs, few experimental data are available in the literature. The aim of this paper is to overcome this gap by means of the ...

Aug. 24, 2017

By IWA Publishing
A method for quantitative discrimination in flow pattern evolution of water distribution supply areas with interpretation in terms of demand and leakage

A method, the comparison of flow pattern distributions (CFPD), is described in which the specific representation of flow measurements for two different time periods allows a direct, quantitative interpretation of changes in the pattern. Two types of changes can be distinguished. The first is changes from one period to the next in demand consistent with the existing pattern, e.g. due to changing ...

Nov. 27, 2012

By IWA Publishing
Investigation of water consumption patterns among Irish adults for waterborne quantitative microbial risk assessment (QMRA)

Microbial and chemical contamination of drinking water supplies can cause human health problems. Microbial pathogens are of primary concern and quantitative microbial risk assessment (QMRA) is employed to assess and manage the risks they pose. Estimates of drinking water consumption, or distributions, are required to assess levels of waterborne pathogen exposure. To establish distributions for ...

Sep. 10, 2012

By IWA Publishing
Human pharmaceuticals in the marine environment: Focus on exposure and biological effects in animal species

Marine waters have been poorly investigated for the occurrence of pharmaceutical contamination. Recent data confirm that pharmaceuticals widely occur in marine and coastal environments; therefore assessment of potential risk to marine species needs further efforts. The present paper represents the first extensive review of pharmaceutical contamination in marine environments addressing the ...

Jun. 26, 2015

By John Wiley & Sons, Ltd.
Observation of isotopes in the water cycle—the Swiss National Network (NISOT)

The Swiss National Network for the Observation of Isotopes in the Water Cycle (NISOT) includes eleven precipitation, seven surface water (river) and three groundwater stations, where tritium, deuterium and oxygen-18 are monthly measured in composite samples. The network provides a good overview of the characteristic isotope signatures in recharge waters in Switzerland and of the relations between ...

Dec. 1, 2003

By Springer-Verlag GmbH
Water distribution model for decision-making with updatable data links

From February 2011 to December 2012, the Tallinn Water Company, AS Tallinna Vesi (ASTV), aimed at improving the previous hydraulic model creation procedures so that the model can be operatively updated through the available geographic information system, client information system (Navision), supervisory control and data acquisition system (SCADA). The goal of the project was to analyse various ...

Aug. 6, 2015

By IWA Publishing
Unaccounted for water and the performance of water utilities: an empirical analysis from India

Conventional benchmarking measures focus mainly on water produced whilst ignoring water produced but not reaching consumers, unaccounted for water (UFW). Benchmarking must credit utilities for a reduction in UFW and improvements in service delivery. This study measures the performance of 20 urban water utilities using data from an Asian Development Bank survey of Indian water utilities in 2005. ...

Oct. 1, 2010

By IWA Publishing
Evaluating the snow component of a flood forecasting model

The objective of this study is to evaluate the snow routine of a semi-distributed conceptual water balance model calibrated to streamflow data alone. The model is used for operational flood forecasting in 57 catchments in Austria and southern Germany with elevations ranging 200–3,800 m a.s.l. We compared snow water equivalents (SWE) simulated by the hydrologic model with snow covered ...

Oct. 5, 2012

By IWA Publishing
Cost-effective sensors placement and leak localization – the Neptun pilot of the ICeWater project

This paper extends previous research to analytically identify leaks within a water distribution network (WDN), by combining hydraulic simulation and network science based data analysis techniques. The WDN model is used to run several ‘leakage scenarios’, by varying leak location (pipe) and severity, and to build a dataset with corresponding variations in pressure and flow, induced ...

Aug. 6, 2015

By IWA Publishing
Modeling the effect of weather conditions on urban water demand in multiple network areas: a practical approach to improve monthly and seasonal operation

The current paper is aimed at studying the influence of weather conditions on urban water consumption using available continuous flow measurements from existing district metered areas (DMA), belonging to different Portuguese water distribution systems. A three-step methodology was followed: Data processing; DMA segmentation in terms of billed consumption and socio-demographic characteristics; ...

Nov. 24, 2016

By IWA Publishing
Development and identification of a multi-species water quality model for reclaimed water distribution systems

With the rapid development of a centralized wastewater reuse scheme in China, water quality concerns arise considering the long-distance transport of reclaimed water in distribution systems from wastewater treatment plants to points of use. To this end, a multi-species water quality model for reclaimed water distribution systems (RWDSs) was developed and validated against the data from part ...

Mar. 18, 2015

By IWA Publishing
Detecting anomalies in water distribution networks using EPR modelling paradigm

Sustainable management of water distribution networks (WDNs) requires effective exploitation of available data from pressure/flow devices. Water companies collect a large amount of such data, which need to be managed correctly and analysed effectively using appropriate techniques. Furthermore, water companies need to balance the data gathering and handling costs with the benefits of ...

Dec. 12, 2015

By IWA Publishing

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