Estimate of pipe deterioration and optimal scheduling of rehabilitation

2005 ◽  
Vol 5 (2) ◽  
pp. 39-46 ◽  
Author(s):  
E.S. Kim ◽  
C.W. Baek ◽  
J.H. Kim
Keyword(s):  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Optimal Scheduling ◽  
Survey Method ◽  
Probabilistic Neural Networks ◽  
Scheduling Model ◽  
Rehabilitation Model ◽  
Optimal Rehabilitation ◽  
Residual Service

This study proposes an optimal scheduling model for rehabilitation based on the deterioration prediction of existing pipes by using the deterioration survey method for a water distribution system. The deterioration prediction model divides the deterioration degree of each pipe into 5 degrees by using the Probabilistic Neural Networks (PNN). Furthermore, the maximum residual service time is estimated by the calculated deterioration degree for each pipe and pipe diameter. The optimal rehabilitation model by integer programming (IP), based on the shortest path, can calculate the time and cost of maintenance, rehabilitation, and replacement. Consequently, the model proposed by the study can be utilized as a quantitative method for the management of a water distribution system.

scholarly journals Near-optimal scheduling of device activation in water distribution systems to reduce the impact of a contamination event

2011 ◽  
Vol 14 (2) ◽  
pp. 345-365 ◽  
Author(s):  
S. Alvisi ◽  
M. Franchini ◽  
M. Gavanelli ◽  
M. Nonato
Keyword(s):  
Distribution System ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution System ◽  
Optimal Scheduling ◽  
Mixed Integer ◽  
Maximum Speed ◽  
Contaminated Water ◽  
Flow Control Devices ◽  
The Impact

This paper proposes an innovative procedure for identifying, in the event of accidental or intentional contamination of a water distribution system, the optimal scheduling of activation of a pre-selected set of flow control devices which will serve to minimise the volume of contaminated water consumed by users after the detection of the contaminant in the system. The constraints are represented by the number of available response teams and the maximum speed at which these teams can travel along the roadway. The optimal scheduling of device activation is sought by means of an optimisation process based on a genetic algorithm (GA) which interacts with a mixed integer linear programming (MILP) solver in order to ensure the feasibility of the scheduling identified. The optimisation procedure is coupled to a hydraulic and quality simulator, which enables a calculation of the volumes of contaminated water consumed by users, and a dynamic cache memory, which, by storing information on the system's behaviour as the optimisation process progresses, serves to limit the computational times. The application of the procedure to a highly complex real water distribution system shows that the optimisation process is robust and efficacious and produces a smaller volume of contaminated water consumed by the users than when the activation of all the devices was completed in the shortest amount of time.

scholarly journals Efisiensi Pemberian Air Pada Jaringan Irigasi Way Bini Kecamatan Waeapo Kabupaten Buru Provinsi Maluku

Agrologia ◽  
2018 ◽  
Vol 5 (2) ◽  
Author(s):  
Said Ar Assagaf ◽  
Charles Silahooy ◽  
Pieter J Kunu ◽  
Silwanus Talakua ◽  
Rudi Soplanit
Keyword(s):  
Water Availability ◽  
Irrigation Water ◽  
Distribution System ◽  
Water Distribution ◽  
Water Distribution System ◽  
Irrigation System ◽  
Water Requirement ◽  
Rice Cultivation ◽  
Survey Method ◽  
Irrigation Water Requirement

Dams irrigation system is important facility to ensure the water availability during rice cultivation. The aim of this study was to verify the condition of Way Bini irrigation system in providing irrigation water and water distribution system to meet the needs of rice cultivation in Savana Jaya Village, Waeapo Subdistrict, Buru District. The research used survey method. The results showed that the irrigation water debit required for appropriate rice cultivtion was 677.16 L/sec (0.68 m3/sec) which was smaller than that of the Way Bini dam; 750 L / s (0.75 m3 / s), while the efficiency of the irrigation water requirement was 70% which was categorized as good to excellent.

scholarly journals The Water Tariff in a WDS Rehabilitation

10.29007/nqjt ◽  
2018 ◽  
Author(s):  
Simone Santopietro ◽  
Carla Tricarico ◽  
Mark Morley ◽  
Dragan Savic ◽  
Zoran Kapelan ◽  
...  
Keyword(s):  
Distribution System ◽  
Aging Process ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution System ◽  
National Level ◽  
Water Industry ◽  
Optimal Rehabilitation ◽  
Water Companies ◽  
Rehabilitation Strategy

The aging process in water distribution system is one of the main drivers for the reduction of performances in water distribution systems. Furthermore, this conditions usually imply an increase in the maintenance costs that the water utilities have to sustain. In this situation it is required to undertake programmatic strategies in order to guarantee the highest benefit for both the final users and the water companies. An optimal rehabilitation strategy has been proposed in order to take into account the regulatory schemes that have to be abided at the national level, in the water industry.

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