Team # XXXXXXX Page 5 of 21
• By using AHP and TOPSIS in series, the fair coefficient of general water and power gener-
ation water is obtained, which can solve the competition problem between them.
• On the basis of the previous results, we define the loss function, establish a new model, and
put forward the allocation strategy of water resources under different drought conditions.
• The sensitivity analysis of the model was carried out in two aspects (six conditions), to
verify the applicability of the model.
2 Preparation of the Models
2.1 Assumptions
We make some assumptions to simplify our model. These assumptions and corresponding
justification are listed below:
• Both dams are standard arch dams, and the level-volume relationship satisfies the quadratic
function. We consulted many arch dam calculations, and fitted dam water level-volume data
for nearly 60 years by the Ordinary Least Squares, resulting in the following graph Figure
3.
Figure 3: Stage-capacity curve for GC and Hoo dam
It can be found that the resulting expression does not fit the origin, because the data is lim-
ited by scope. However, the Lake Water Database records minimum safe water levels clearly
(marked by the green line), which must be reached to meet the requirements for power gen-
eration. So our discussion followed will be conducted at levels higher than the safe water
level, not involve lower water levels that may be incorrectly predicted.
• All Colorado River water is used by five states and Mexico. Following the guidance to
give all the surplus water to Mexico, we do not consider the amount of water set aside for
other areas or flowing into the sea.