Chapter 3 Decision Support Model (IUWS-DSM) - Tubdok

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Chapter 3 · Decision Support Model (IUWS-DSM) 49 Chapter 3 Decision Support Model (IUWS-DSM) Based on the conception introduced in the last chapter, a decision support model for IUWS, namely IUWS-DSM, is conceived and constructed. The system structure and executable planning procedure are established, the decision making mechanisms and rules are developed, and the methods of calculation and comparison are introduced regarding system costs and energy consumption. Consequently, the concept to realise the IUWS-DSM in the software is proposed. 3.1 Architecture of IUWS-DSM The basic idea is to build up a simple but functional DSM. The model should have a simple framework, as well as be easily realised in software. Moreover, the model should have the potential to be further developed in the future. Figure 24 lays out the architecture of the decision support model (IUWS-DSM). The thick hollow arrows indicate the model procedure that is situated on the left side in Figure 24. The blocks on the right side represent the software components for managing the information and processing the data. Following the model procedure, first the project information is requested, which needs to be input by model users. Then the calculation is performed, which consists of two parts that are water usage management and WIS. The related information, such as EUWUP and water standards, etc., is acquired from the database that is set up independently. Then the system options are compared. For both calculation and comparison the necessary decision making policies are used. It can step back to calculation as the revision to water system may be needed after comparison. Finally, the optimised system options and suggestion are feedback to the model users. In the steps of calculation and comparison, the interaction between model users and the model can be necessary, which is indicated by dashed lines in Figure 24. The components on the right side in Figure 24 are for constructing the software. The database is used to store the information and data. Three types of data containers are identified, i.e. for project information, for general information, and for knowledge base. Project information is the private information belonging to each project, where general information is the sharable public information, e.g. EUWUP and water standards, etc. By definition, Knowledge base is the database containing the knowledge with which the inference engine draws conclusions (Giarratano and Riley 2005). Those conclusions are the expertise that the model users query. In the IUWS-DSM, it is used to manage the information
50 New Conception and Decision Support Model for IUWS of evaluation tools and decision making policies. All these components can be intervened in by model users. Architecture of the Decision Support Model (IUWS-DSM) USER Abbreviation: EUWUP – End-User抯 Water Usage Profile Input requested planning information Water usage management System calculation Options comparison Water infrastructure systems (WIS) Output optimised system options and suggestion Legend: model procedure, double arrows represent the iteration Project Information 1. system planning 2. water sources General Information 1. treatment facilities 2. conveying systems 3. EUWUP 4. water standards Knowledge Base 1. evaluation tools 2. decision making policies communication and manipulation of data, double arrows represent the interaction Figure 24: Architecture of the decision support model (IUWS-DSM) Based on the above concepts, the planning procedure, the decision making policies, and the methods for system calculation and comparison are developed. 3.2 Planning procedure for water entities In principle, the water system is planned based on the annually average daily water consumption, as the flow rate m 3 /d. Because the model is for planning IUWS in the early project phase, the monthly, daily and hourly fluctuations of water demand are not taken into account at present. In the same way, water sources are calculated as daily water amount based on the annually available water volume, where the seasonal or monthly fluctuations of both quantity and quality are skipped. Such fluctuations can be involved in the future development of the model. Being the independent water entities, the CA, UD, WUU and WUC, are planned individually. Meanwhile, since the water entities are hierarchically embedded, the interrelations must be properly described and managed. Based on these concepts, the general planning procedure is developed, and then the particular procedures or steps are set up according to each type of water entities.
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New Conception and Decision Support
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Acknowledgements By this chance, I
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Contents Indices I TABLES .........
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Indices III 3.6 Realisation Method
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Indices V Table 32: Sheet of averag
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Indices VII Figure 31: Cost estimat
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LuQi.02 LuQi.01 Source: http://www.
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Appendix.Figure 8: 3-D map of the c
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WUU WUC type area [ha] popul. [capi
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Appendix.Table 14: Water demands an
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unit: m 3 /d demand : current deman
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Appendix.Table 16: Used water amoun
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Chapter 3 Decision Support Model (IUWS-DSM) - Tubdok

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