18.11.2012 Views

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

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

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

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

<strong>Chapter</strong> 3 · <strong>Decision</strong> <strong>Support</strong> <strong>Model</strong> (<strong>IUWS</strong>-<strong>DSM</strong>) 87<br />

Very importantly, the user friendly Graphical User Interface (GUI) must be developed, so<br />

that the software can be easily controlled by water engineers and city planners. Moreover,<br />

the function of guidance, prompts, and instant help should be embedded, too. For example,<br />

the compulsory and optional items of input can be labelled with different backgrounds and<br />

likewise, the user input values and default values can be displayed in different colours.<br />

As two main modules, <strong>Model</strong> Engine and Database are explained a bit more as follows.<br />

3.6.2 <strong>Model</strong> engine<br />

Most functions and tasks are achieved by the model engine. Based on the planning<br />

procedure established in § 3.2, the calculation and comparison that are introduce in § 3.4<br />

and § 3.5 are realised by the model engine. Though the decision making polices developed<br />

in § 3.3 are stored in the database, the model engine has the right to control and call them to<br />

infer the solutions. The model engine is in charge of the communication between model<br />

users and the <strong>IUWS</strong>-<strong>DSM</strong>, other software and the <strong>IUWS</strong>-<strong>DSM</strong>, as well as between modules<br />

inside the <strong>IUWS</strong>-<strong>DSM</strong>.<br />

3.6.3 Database<br />

Based on the structure of the <strong>IUWS</strong>-<strong>DSM</strong>, eight subsets are built up in the database, i.e.<br />

1. System Planning, 2. Water Sources, 3. Treatment Facilities, 4. Conveying Systems, 5.<br />

Water Usage Profiles, 6. Quality Standards, 7. Evaluation Tools, 8. Expert Knowledge<br />

(Figure 40). As categorised above, the subsets 1 and 2 contain the project information, and<br />

the subsets 3 to 6 contain the general information, where the subsets 7 and 8 are the<br />

knowledge base. The corresponding tables in database are established as the examples and<br />

displayed in Appendix 1.<br />

Structure of Database in the Software<br />

Database of<br />

<strong>IUWS</strong>-<strong>DSM</strong><br />

System<br />

Planning<br />

water entity:<br />

type ZONE<br />

water entity:<br />

type GROUP<br />

Water<br />

Sources<br />

local<br />

external<br />

Project Information<br />

Treatment<br />

Facilities<br />

on-site<br />

construction<br />

package<br />

plant<br />

Conveying<br />

Systems<br />

pipes<br />

& canals<br />

ancillary<br />

works<br />

vehicles<br />

Water Usage<br />

Profiles<br />

social &<br />

commercial<br />

communal<br />

& ecological<br />

industrial<br />

& special<br />

General Information<br />

Quality<br />

Standards<br />

raw water<br />

desired<br />

water<br />

used water<br />

Figure 40: Structure of Database in the Software<br />

Evaluation<br />

Tools<br />

cost<br />

estimation<br />

energy<br />

assessment<br />

Expert<br />

Knowledge<br />

Knowledge Base<br />

decision<br />

making rules

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!