| Author | He, Qing |
| Call Number | AIT Thesis no. WA-87-12 |
| Subject(s) | Reservoirs|--China--Tianjin
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | The difficulty involved in the solution of the problem of
optimal operation of multi-unit reservoir systems taking into
account the stochastic nature of inflows lies in the dramatical
increase of the model dimensions. This study presents methods
based on single reservoir stochastic dynamic programming concept
to obtain operation policies for a system of three reservoirs,
Panjiakou, Daheiting and Yuqiao. The system includes an
interbasin water transfer from the Luanhe River to meet the water
demand of the metropolitan area of Tianjin. Two mode ls have been
developed to derive optimal operational rules.
First a simple combination of the two serially interlinked
reservoirs Panjiakou and Daheiting are considered as one
composite reservoir. The feasibility of this simplification was
checked by comparing the simulated operation of the reservoirs
with SDP based optimal operation policies which were derived from
one composite reservoir configuration and two separate reservoirs
configurations.
The second model is deriving the optimal operation policies
of the two-reservoir surrogate system according to the 'one-at-a-time' principle by repeatedly using single reservoir's SDP model
on Yuqiao with its local inflows; then the composite reservoir
with the 'expected shortage values ' of Yuqiao reservoir first
optimization as water demand; then the operation of Yuqiao
reservoir was optimized again with the combination of its local
inflow and the transferred releas e from the composite reservoir
together as its 'natural' inflow. The fundamental concept of this
method is the identification of " expected shortage values" as
defined by the mean monthly difference between the water demand
of Tianjin and the release according to the optimal policies of
the first optimization of Yuqiao reservoir. These expected
shortage values are obtained by simulation and used as targets to
be met by the operation of the upstream composite reservoir. In
the process, the effect of three different possible objectives,
namely minimizing reservoir spillage, minimizing quadratic
deviation from downstream water de1nand and maximizing reservoir
releases, are considered a nd compared.
Finally sensitivity analyses concerning the active capacity
of Yuqiao, conveyance capacity of the downstream channel and
water requirement of Tianjin have been carried out.
|
| Year | 1987 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Water Resources Research Engineering (WA) |
| Chairperson(s) | Bogardi, Janos J. |
| Examination Committee(s) | Wang, Tsan-Wen ;Paudyal, Guna N. ;Tawatchai Tingsanchali
|
| Scholarship Donor(s) | New Zealand Government |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology,1987 |