17.3 Environmental Flow Assessment and Water Resources…
387
Zhuxi Reservoir
Changtan Reservoir
Zhu Creek
Yong'an Creek
Shifeng Creek
Ling River
Jiao River
Yongning River
L1
L2
L3
L4
L5
L6
Fig. 17.6 Schematic of IQQM model flow reporting nodes. Source WET (2007). Permission
granted by WET project subject to proper citation
volume of 30.64 million m
3 and for urban water supply: 100 m—a volume of 5.14
million m
3 . Minimum environmental demand is 0.14 m
3 /s to be released from Zhuxi
Reservoir.
The pipeline from the Zhuxi Reservoir to Changtan Reservoir will deliver 270,000
m
3 /d in 2011 and 680,000 m
3 /d in 2020—this includes the diversion of 410,000 m
3 /d
from Shisandu Reservoir.
The basic parameters for Changtan Reservoir are that the full storage volume is
357 million m
3 and the inactive storage volume is 1 million m
3 . Notably, the model
assumes a change to the infrastructure design of Changtan Reservoir. The low-level
outlet capacity for Changtan Reservoir as per the design report is too small to supply
the 2020 demands. To remove this constraint from supplying the required demands,
the model assumes increases to the capacity for the lower storage volumes. The
discharge characteristics adopted in the model and the original design values are
compared in Table 17.10.
Table 17.10 Changes to the Changtan Reservoir low-level outlet discharge characteristics
Stored volume (million m 3 ) Outlet capacity in design report
(1,000 m 3 /d)
Modeled outlet capacity (1,000
m 3 /d)
1
0
72
1,296
1,500
95
1,296
3,700
104
1,296
3,700
114
2,419
3,750
124
2,419
3,800
134
4,579
4,579
Source WET (2007)
Permission granted by WET project subject to proper citation
387
Zhuxi Reservoir
Changtan Reservoir
Zhu Creek
Yong'an Creek
Shifeng Creek
Ling River
Jiao River
Yongning River
L1
L2
L3
L4
L5
L6
Fig. 17.6 Schematic of IQQM model flow reporting nodes. Source WET (2007). Permission
granted by WET project subject to proper citation
volume of 30.64 million m
3 and for urban water supply: 100 m—a volume of 5.14
million m
3 . Minimum environmental demand is 0.14 m
3 /s to be released from Zhuxi
Reservoir.
The pipeline from the Zhuxi Reservoir to Changtan Reservoir will deliver 270,000
m
3 /d in 2011 and 680,000 m
3 /d in 2020—this includes the diversion of 410,000 m
3 /d
from Shisandu Reservoir.
The basic parameters for Changtan Reservoir are that the full storage volume is
357 million m
3 and the inactive storage volume is 1 million m
3 . Notably, the model
assumes a change to the infrastructure design of Changtan Reservoir. The low-level
outlet capacity for Changtan Reservoir as per the design report is too small to supply
the 2020 demands. To remove this constraint from supplying the required demands,
the model assumes increases to the capacity for the lower storage volumes. The
discharge characteristics adopted in the model and the original design values are
compared in Table 17.10.
Table 17.10 Changes to the Changtan Reservoir low-level outlet discharge characteristics
Stored volume (million m 3 ) Outlet capacity in design report
(1,000 m 3 /d)
Modeled outlet capacity (1,000
m 3 /d)
1
0
72
1,296
1,500
95
1,296
3,700
104
1,296
3,700
114
2,419
3,750
124
2,419
3,800
134
4,579
4,579
Source WET (2007)
Permission granted by WET project subject to proper citation