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

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Chapter 5 Summary Chapter 5 · Summary 95 Conventionally, three water systems in urban area, i.e. drinking water supply, wastewater disposal and rainwater elimination, are planned, designed, and managed individually. Very often water supply and wastewater disposal systems are centralized systems, where rainwater is eliminated from cities as soon as possible. It has been realised that such kind of urban water systems is neither sustainable nor optimised. Today, the water scarcity is becoming the global problem due to many man-made reasons, such as population explosion, water pollution, industrialisation and urbanisation. Hence, the better solutions of our urban water systems are desiderated. The cycle makes the world endless. The appropriate cycle makes the nature balanced. Thus, the water cycle in urban area needs to be properly closed, too. As two sides of urban water systems, water usage and water infrastructure need to be properly matched. Based on these ideas, the new conception for integrated urban water system (IUWS) is conceived. The conception is further developed into the decision support model IUWS-DSM that is a tool for planning IUWSs in the early project phase. For having the clear overview of the dissertation, the systematic structure of the dissertation is sketched in Figure 41. Following the arrows, the ideas and systems can be easily discerned. First of all, the urban water system is structured in the hierarchy, where the entire water system is divided into four levels including two types of water entities, i.e. ZONE type and GROUP type. The water entities of ZONE type cover the first two levels in the hierarchy, and the water entities of GROUP type form the third and the fourth levels. From top to bottom, four levels are: a. City Area (CA), b. Urban District (UD), c. Water Utilisation Unit (WUU) and d. Water Utilisation Cell (WUC). CA represents the whole water system or one absolute independent water system in urban area, which is going to be the IUWS. UD is the divided urban area that is contained by CA. It can either coincide with administrative canton or be the natural division. WUU is the certain functional unit or group in cities and subsequently, its water system can be managed and coordinated as one entity, e.g. a university or a hospital or two adjacent residential quarters. WUC has the same structure as WUU but on the small scale that mostly focuses on the single large buildings or mono- water end-users. The hierarchy is the base of the IUWS. (§ 2.1.3, p. 11) For constructing the IUWSs, the essential components in urban water systems are reidentified. First, the new terms are defined: Desired water has the quality that satisfies the requirements of end uses. Used water is substituted for the conventional term “wastewater” and includes different types of urban sewage. Desired water quality is further categorised. Besides drinking water quality (represented by Quality A), other two categories (represented by Quality B and Quality C) are set up in order to adapt to the variety of required water quality in cities. Based on the characteristics of used water, the source separated collection
96 New Conception and Decision Support Model for IUWS system (SSCS) is introduce and adopted, which means that different streams of used water coming from domestic activities should be collected separately. (§ 2.1.4.1, p. 13) Systematic Structure of the Dissertation Chapter 1 General Introduction 1.1 Urban water systems 1.2 Decision support systems 1.3 Scope of the research Chapter 2 New Conception components § 2.1.4 water cycle § 2.1.1 System composition water usage side water infrastructure side Evaluation criteria cost estimation energy consumption assessment Fundamentals § 2.1 composition § 2.1.2 Subsystem § 2.2 water usage § 2.2.1 sources § 2.2.2 desired water § 2.2.3 used water § 2.2.4 rainwater § 2.2.5 IUWS § 2.3 Abbreviations: IUWS – Integrated Urban Water System WIS – Water Infrastructure System DSM – Decision Support Model hierarchy 2.1.3 end-user § 2.2.1.1/2 estimation § 2.2.1.3 options § 2.2.2.1 plan process § 2.2.2.2 options § 2.2.3.1 plan process § 2.2.3.2 options § 2.2.4.1 plan process § 2.2.4.2 options § 2.2.5.1 options § 2.3.1 plan process § 3.3.2 plan process § 2.2.5.2 Chapter 3 Decision Support Model GROUP § 3.2.2 Decision policy § 3.3 sources § 3.3.1 supply § 3.3.2 collection § 3.3.3 used water § 3.3.4 rainwater § 3.3.5 water usage § 3.5.1 WIS § 3.5.2 Architecture § 3.1 Plan procedure § 3.2 general § 3.2.1 Software § 3.6 ZONE § 3.2.3 size § 3.4.1 cost § 3.4.2 energy § 3.4.3 Comparison § 3.5 Chapter 4 4.1 New conception 4.2 IUWS-DSM 4.3 Uncertainty 4.4 Improvement 4.5 Prospect Figure 41: Systematic structure of the Dissertation Evaluation § 3.4 The water infrastructure system (WIS) is redefined that consists of two parts: the intake and treatment facilities, and the conveying system. The treatment processes of raw water and used water are classified into certain steps. Meantime, the construction methods of treatment facilities are emphasised, i.e. on-site constructed or package plant, where the later
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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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Definitions term definition & expla
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Abstract Indices XI Traditionally,
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2 New Conception and Decision Suppo
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Chapter 2 New Conception Chapter 2
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Composition of Modern Urban Water S
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2.1.4.1 water quality Chapter 2 ·
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Chapter 2 · New Conception 15 Aust
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Chapter 2 · New Conception 17 sepa
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Classifcation of Urban Water Treatm
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Chapter 2 · New Conception 21 Thre
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2.1.4.3 conveying system Chapter 2
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Chapter 2 · New Conception 25 of r
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Chapter 2 · New Conception 27 syst
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Chapter 2 · New Conception 29 betw
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General Priority of Water Sources C
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Chapter 2 · New Conception 33 Sing
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Chapter 2 · New Conception 35 irri
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Table 10: System options of used wa
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Chapter 2 · New Conception 39 flus
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2.3 Integrated Urban Water System (
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Table 16: Matrix for calculating co
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Chapter 3 Decision Support Model (IUWS-DSM) - Tubdok

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