mag

Malaysia Water Research Journal
Figure 8. Contour and phreatic line (q = 3.5620 x 10-8 m3/sec)
Figure 9. Phreatic line at 14.0m water head level (q = 3.5620 x 10-8 m3/sec)
Table 4. Seepage rate base on varies value
Scenario Hydraulic Conductivity Seepage rate
Rock fills (m/s) Clay core
(m/s)
Reduce by
(m3/s.m)
1 5 x 10-3 1 x 10-9 2 times 1.73 x 10-8
2 1 x 10-3 2 x 10-10 10 times 3.53 x 10-9
3 1 x 10-4 2 x 10-11 100 times 3.56 x 10-10
Based on the analysis carried out on the parameters and data of seepage
flow on Putrajaya dam provided, it is found that the quantity is theoretically lower
than the value set by the seepage of the International Committee of Large
Dam (ICOLD) of 3.5620 x 10-8 m3/sec. Based on the analysis and simulation
of seepage on Putrajaya dam found the seepage rate decreases with the
reduction of hydraulic conductivity, k. Based on the analysis done by simulate
three different values of hydraulic conductivity, seepage flow rate is found
decreases with decreases of hydraulic conductivity (Mohamed, T.A., 2006). All
simulation of these analysis as shown in Figure 10, 11, and 12. The lower rate of
seepage is must better for stability of the dam (Ahmad A. A., 2009; Hasan, M.K.,
1999). It’s important for selecting material for filling the dam embankment with
Institut Penyelidikan Hidraulik Kebangsaan Malaysia (NAHRIM)
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National Hydraulic Institute of Malaysia (NAHRIM)