Assessing and controlling leakage in a selected district metering area in Ja-Ela, Sri Lanka | |
| Author | Awyaja, L.D.L. Chinthika |
| Call Number | AIT Thesis no.UWEM-15-07 |
| Subject(s) | Water--Distribution--Sri Lanka--Ja-Ela Water leakage--Sri Lanka--Ja-Ela |
| Note | 86 leaves, [17] : ill. |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. UWEM-15-07 |
| Abstract | Water lossreduction is a common battle that the allthe water utilities in the world takepart,but developing countries suffer morebecause of financial constraints, data unavailability and insufficient expert knowledge. Unfortunately, mostof theseutilities take actions on leakage management, when the condition becomesserious and set their targets with noproper methodology.This study is focused to overcomeaboveissues by achieving three objectives such as developinga hydraulic model to assess the leakageina distribution system in Sri Lanka which is currently experiencing significant rate of raisingthe NRW, derivation of sustainable level of economic leakage level (SELL) and application of hydraulic model with leakage controlmethods on alternatives for leakage reduction.The main spotlight of this study is that this leakage assessment and controlling approach is based on sustainable perspective. Environmental and social costs of leakage and leakage management are included in calculations of economic levelof leakage (ELL) fortarget settings.The ELL is estimated at 40m3/conn./yearwith private costs of utility. Further, it is estimated the short run ELLat 35 m3/conn./year with short runmarginal costs and the long run SELL is at 30 m3/conn./year with long run marginal costs.In addition, the leakage is modelled by using EPANET Emitter hydraulic modelling software. Different alternatives of leakage control areproposed in a combination ofleakagemanagement, asset management and distribution network improvements. According to the current ALCC and MCW, NWSDB has a present economic opportunity ofspending22.05 LKR/m3more to save water by leakage management. Leakage control by proper target setting with SELL is more suitable for the water deficit areas. This method of SELL derivedwould be a useful direction to the utility managers in future calculations of leakage targets. |
| Year | 2015 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. UWEM-15-07 |
| Type | Thesis |
| School | School of Engineering and Technology |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Urban Water Engineering and Management (UWEM) |
| Chairperson(s) | Babel, Mukand Singh |
| Examination Committee(s) | Trifunovic, Nemanja;Visvanathan, C.;Jourdain, Damien |
| Scholarship Donor(s) | Netherlands Fellowships Programme(NFP) |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology - UNESCO-IHE, 2015 |