MARC 主機 00000nam  2200325   4500 
001    AAINQ94265 
005    20051208095322.5 
008    051208s2004                        eng d 
020    0612942651 
035    (UnM)AAINQ94265 
040    UnM|cUnM 
100 1  Colombo, Andrew Francesco 
245 10 Energy use and leaks in water distribution systems 
300    220 p 
500    Source: Dissertation Abstracts International, Volume: 65-
       10, Section: B, page: 5280 
500    Adviser:  Bryan Karney 
502    Thesis (Ph.D.)--University of Toronto (Canada), 2004 
520    Contemporary interest surrounding leaks is well documented
       by the proliferation of water loss assessment and leak 
       detection models. The financial penalty caused by the loss
       of billable water has traditionally served as the 
       motivation for this interest. Recently, water quality 
       concerns such as transient intrusion have added a new 
       dimension to the stimulus for leak related research. 
       Despite a growing recognition of the multifarious nature 
       of leakage, its influence on energy use, while implicitly 
       understood, has remained predominantly in the background. 
       This thesis introduces the notion of leaks and energy 
       consumption within a broader planning and modelling 
       context and endeavours to reveal the key physical 
       relationships that govern leaks and energy costs in a 
       system 
520    In order to place the research in a wider context, a map 
       or Labyrinth outlining key aspects of water distribution 
       system design, modelling and operation and their 
       relationship to one another is presented and explained. 
       The term Labyrinth is employed to convey the involuted 
       nature of the web that connects these various interrelated
       processes. Specific focus centres on resource scarcity and
       the existence of a water-energy nexus. Assessment of the 
       physical relationships governing water loss and energy use
       in leaky systems is realized via the analytical 
       investigation of single pipes and the simulation of 
       representative networks using the steady state analysis 
       software EPANET 2. The size and spatial distribution of 
       leaks, demand, storage, pumping strategy and resource 
       prices are several of the factors influencing the energy 
       and water loss response of systems to leakage. Because 
       leaks share certain attributes with legitimate system 
       demand, the possibility that leakage modelling may have 
       wider application as a surrogate or analogy for demand 
       representation is briefly explored 
520    As part of a comprehensive strategy to make infrastructure
       more efficient in the face of resource scarcity, mounting 
       financial cost and environmental degradation, the 
       possibility that leak repair can act as a hedge against 
       future growth in water demand is introduced. Specifically,
       the connection between climate change and the possible 
       synergistic concurrence of peak water and energy demand is
       considered in light of the water-energy nexus 
590    School code: 0779 
590    DDC 
650  4 Engineering, Civil 
690    0543 
710 20 University of Toronto (Canada) 
773 0  |tDissertation Abstracts International|g65-10B 
856 40 |uhttp://pqdd.sinica.edu.tw/twdaoapp/servlet/
       advanced?query=NQ94265