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...

Various methods have been used to economically design wastewater and stormwater collection systems. In this article, Discrete Differential Dynamic Programming (DDDP) which is a subsection of dynamic programming (DP) was used. For each pipe network, various alternatives such as depth and slope of pipe laying and various diameters could be considered to satisfy hydraulic and engineering constrain...

Visual inspection by a human operator has been mostly used up till now to detect cracks in sewer pipes. In this paper, we address the problem of automated detection of such cracks. We propose a model which detects crack fractures that may occur in weak areas of a network of pipes. The model also predicts the level of dangerousness of the detected cracks among five crack levels. We evaluate our ...

If all parameters influencing sewer performance were known (or deterministic) then the decision making process associated to the planning of sewer replacement should be relatively straightforward. However, when trying to forecast service life, uncertainties arise considering the deterioration process, the variability of sewer pipe properties, environmental conditions or the used information res...

This paper focuses on the multi-objective optimization of a sewer network that serves medium-sized Romanian city, with population 250,000 residents. The is modeled using BSMSewer software package. obtained results are based numerical simulations algorithm considering two performance criteria: volume overflow and quality overflowed wastewater. For optimization, approaches use controlled elitist ...

The role of sewer lines as preferential pathways for vapor intrusion is poorly understood. Although the importance of sewer lines for volatile organic compound (VOC) transport has been documented at a small number of sites with vapor intrusion, sewer lines are not routinely sampled during most vapor intrusion investigations. We have used a tracer study and VOC concentration measurements to eval...