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

3.2.1 General procedure
General Planning Procedure for Water Entities
Chapter 3 · Decision Support Model (IUWS-DSM) 51
Following the conception given in § 2.3.2, the planning procedure falls into two stages
with eight designing steps (Figure 25). This general procedure is the base for planning all
four types of water entities.
step main work and aims
Stage One: water usage management
1 request basic planning information
2 ascertain possible EUWUP,
assess the water usage scenarios
3 evaluate available and possible water sources
4 determine the planning principles of water system
Stage Two: design of WIS
5 appraise the system sizes
6 estimate systems costs
7
evaluate system energy consumption
8 compare the different system options,
generate the advisable system options
Figure 25: General planning procedure for water entities
Stage One. Water demand, sewage generation and water sources are determined and
matched. The optimised water usage is thereby found out, which acts as the footstone of the
next stage. Corresponding to Figure 25, each step is explained as follows.
Step 1. First of all, basic information of water entity is requested, such as the area sizes,
the planned or existent population. If it is WUU or WUC, its type needs to be confirmed so
that its EUWUP can be determined (see Figure 12). Other information, like green area, road
area, water bodies (rivers or ponds) should also be given but not compulsory. The suggested
data-acquiring forms (i.e. tables) are built up and shown in Appendix 1.1.
Step 2. Afterwards, the water usage of water entity is measured. As discussed in previous
chapter, the EUWUP is set up for grouped end-users, which is pre-defined and stored in
database. Therefore, the water usage of WUC and WUU is simply obtained based on their
types and sizes and the corresponding EUWUP, where the water usage of UD and CA are
calculated based on their affiliated water entities. Each water entity can use several EUWUP,
which represent different scenarios.
Step 3. Subsequently, the water sources of the planned water entity are inspected and
matched to the water demands. The water quantity and quality of each possible water source
are measured. If several water sources are available, the priorities of water sources need to