At present, many metropolitan sewer systems do not meet existing and proposed standards on water pollution. Existing systems were designed to overflow at prescribed locations in order to protect the sewage treatment plants whenever severe overload conditions exist (usually during storms). This discharge of untreated overflows into natural receiving waters is of growing concern to water pollutio...

The gradual growth of the use of radionuclides in nuclear medicine, since the decade of 70, and the consequent increase of liquid radioactive discharges for the urban sewer network, brought the necessity of revise the current maximum values for release of radioactive material in sewage systems, and to develop regulation to ensure the protection of man and the environment. According to the IAEAI...

Limnimeter and Rain Gauge FDI in Sewer Networks 1 using an Interval Parity Equations based Detection Approach 2 and an Enhanced Isolation Scheme 3 4 Vicenç Puig, Joaquim Blesa 5  6 Advanced Control Systems Group (SAC), Institute of Robotics and Industrial Informatics (IRI-CSIC) ,Universitat 7 Politècnica de Catalunya (UPC), Pau Gargallo, 5 ,08028 Barcelona, Spain 8 (e-mail: [email protected]...

Suburban areas are subject to strong anthropogenic modifications, which can influence hydrological processes. Sewer systems, ditches, sewer overflow devices and retention basins are introduced and large surface areas are sealed off. The knowledge of accurate flow paths and watershed boundaries in these suburban areas is important for storm water management, hydrological modelling and hydrologic...

In recent years, decision analysis has become an important technique in many disciplines. It provides a methodology for rational decision-making allowing for uncertainties in the outcome of several possible actions to be undertaken. An example in urban drainage is the situation in which an engineer has to decide upon a major reconstruction of a system in order to prevent pollution of receiving ...

abstract   background: the pathophysiology of carpal tunnel syndrome is associated with increased intracarpal canal pressure. recently, palmaris longus has been introduced as an independent risk factor for the development of carpal tunnel syndrome. the purpose of this study was to assess the association of carpal tunnel syndrome with the presence of palmaris longus tendon and functional superfi...

The microbial reduction of sulfate to hydrogen sulfide causes sewer pipe corrosion, one of the major issues in the water infrastructure [1]. Oxygen injection is presently considered as an attractive option for sulfide abatement in sewer systems. Oxygen can both inhibit the activity of sulfate reducing bacteria (SRB) and oxidize the sulfide that has been produced [2]. It is less expensive than m...

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 us...

A novel concept for a systematic design procedure of a distributed controller network for global control of a sewer network is proposed. This concept is based on two simple controller types (local throttle controller, supervisory controller) which are connected systematically based on the structure of the sewer network and the available throttle and storage structures. The controllers are based...

The aim of a sensitivity analysis is the exploration of changes in model output induced by changes in model input. Such analysis was used in a multitude of papers and case studies to improve the understanding of model behaviour. The novelty of this paper is that the pictorial power of the Geo Information System (GIS) technology is used to display sensitive parameters for combined sewer models t...