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

114 New Conception and Decision Support Model for IUWS
Appendix 2 Case study
For demonstrating how to use the IUWS-DSM, a case study is performed. It is based on
one Chinese city. The unavailable and inaccessible information that is essential for
calculation is made up in order to execute the model. Therefore, the calculated values may
deviate from the actuality.
Appendix 2.1 Basic information
Appendix 2.1.1 introduction to the city
Taizhou is a fast-developing city located in the southern part of the Yangtze River Delta
on the east coast of China. Taizhou City consists of three large independent urban areas i.e.
Jiaojiang, Huangyan and Luqiao, which were two independent cities and one town in earlier
time. Being transferred from a town, Luqiao has the large requirements of development and
grows quickly now. Meantime, its water infrastructure is insufficient. Hence, Luqiao area is
selected for this case study.
Luqiao has a large administrative area with 274 km 2 , where mostly are farms and small
villages. The total current population is 0,33 million. The land is flat in general. There are hills
on the north-west and south-west sides of the area. The networks of natural waterways cover
the whole area very well. So far the central urbanised area is around 9,5 km 2 with the
population of 100 thousand.
Luqiao has the typical subtropical monsoon climate with evident four seasons. The
precipitation is abundant, with the average value of 1.530 mm/a. But it is uneven distributed,
where 60% occurs in three rain seasons within a year.
According to the statistical data, local water sources are insufficient at the level of 634
m 3 /capita. 85% of total water sources are the surface water. Most surface water is heavily
polluted that cannot be as the source of drinking water. Abstraction of groundwater is strictly
limited due to the risk of seawater intrusion. Therefore, Reservoir Changtan is the water
source for the total Taizhou City. Reservoir Changtan is located 30 km in the west of the city.
Currently, Luqiao has a waterworks with the maximum capacity of 40x10 3 m 3 /d. The
source water is diverted from a pump station located in Huangyan. Luqiao has a wastewater
treatment plant with the maximum capacity of 40x10 3 m 3 /d, which is located in the south-east
corner of Luqiao next to the urbanised area.
Appendix 2.1.2 study area
There is a long-range city master planning for the whole Luqioa area (Appendix.Figure 6).
Due to the master planning, the urban population will reach 0,32 million and daily average
water demand will hit 287x10 3 m 3 /d over the whole planned area. A new transmission
pipeline is planned, which directly diverts the raw water from Reservoir Changtan to Luqiao.
In this case study, only the kernel area of Luqiao is chosen as the study area. First of all,
neither detailed information nor detailed plans of suburbs and new area is available. Second
of all, this case study focuses on demonstrating the way to use the model, so the narrowed