Maintenance management and leakage control in water distribution systems | |
| Author | Huynh Trung Luong |
| Call Number | AIT Diss. no. ISE-00-01 |
| Subject(s) | Water--Distribution Water leakage |
| Note | A dissertation submitted in partial fulfilment of the requirements for the degree of Doctor of Engineering, School of Advanced Technologies |
| Publisher | Asian Institute of Technology |
| Series Statement | Dissertation ;|vno. ISE-00-01 |
| Abstract | The overall theme of this dissertation is maintenance of water distribution networks and related issues. Three major targets related to maintenance management and operation of water distribution networks will be tackled. These are the leakage control and detection problem, the allocation of repair funds, and the optimal maintenance policy for water distribution networks. In the first part of this dissertation, a mathematical model based on the inverse technique is developed to help detect leaks. The model supports the district metering method to detect leaking links in an existing distribution network. The proposed model allocates the total leak quantity to various links of the network by maximizing the L2-norm of the leakage vector. In the second part of the dissertation, two mathematical models are developed which aim at finding the optimal allocation of limited repair funds to different pipe sections of a water distribution network in a short-run operation. The first model and its extensions are cost¬-based minimization programs, which are developed based on basic periodic-review stochastic demand inventory models. The second model is a net benefit maximization program, in which the stochastic nature of leak occurrence times and leak duration are explicitly considered. In the last part of the dissertation, the optimal repair/replacement policy in the long-run operation of the water distribution network is investigated. A mathematical model is first developed to support a decision to repair or replace a pipe in failure states. The objective of the model is to maximize the long-run availability of the pipe under budget constraints. A semi-Markov process is used to depict the deterioration behavior of the pipe and replacement ages at failure of the pipe are considered as decision variables in the proposed model. It is proved that the original nonlinear program resulting from the model formulation can be converted to an equivalent linear program for easier solutions. The model for a single pipe is then extended so that it can help find the optimal replacement policy for the whole water distribution network. |
| Year | 2000 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. ISE-00-01 |
| Type | Dissertation |
| School | School of Advanced Technologies (SAT) |
| Department | Department of Industrial Systems Engineering (DISE) |
| Academic Program/FoS | Industrial Systems Engineering (ISE) |
| Chairperson(s) | Nagarur, Nagendra N.; |
| Examination Committee(s) | Huynh N. Phien;Do B. Khang;Voratas Kachitvichyanukul;Jardine, Andrew K. S; |
| Scholarship Donor(s) | The Government of Japan; |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 2000 |