mag

Malaysia Water Research Journal
low permeability material. It’s ensuring the minimum seepage through the dam
embankment.
Figure 10. The seepage flow rate and phreatic line in reduce by 2 times.
Figure 11. The seepage flow rate and phreatic line in reduce by 10 times.
6 CONCLUSIONS
In this study, the seepage problem through Putrajaya dam was carried out:
i. A seepage flow rate value is not similar compared with the actual
seepage monitoring value done by Perbadanan Putrajaya. The
simulation value is less than combination of three seepage chamber
values at Hydraulic Conductivity, k value of 1 x 10-2m/sec for rock fill
and 2 x 10-9m/sec for clay core. The seepage simulation value is 3.5620
x 10-8m3/sec.m, where the total seepage is 0.0262 l/s.
ii. The simulation values of total seepage through the Putrajaya Dam
were decreases when the value of Hydraulic Conductivity, k is reducing
2 times, 10 times and 100 times compare with allowable combined
seepage limit of 1.5 l/sec, where the total seepage reduce to 0.0127 l/
sec, 0.0026 l/sec and 0.0003 l/sec.
iii. The seepage amount is reducing when the Hydraulic Conductivity, k is
reduced. It shows that seepage dependent of k.
iv. Finite element method can analyse seepage problem faster and more
accurate than the other method such the flow-net method.
92
Institut Penyelidikan Hidraulik Kebangsaan Malaysia (NAHRIM)
National Hydraulic Institute of Malaysia (NAHRIM)