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Modern Geomatics Technologies and Applications

370.16 m during the time of sixth and seventh stages, respectively. Therefore, the
reservoir level couldn't be an significant factor in subsidence of dam (although in 2005,
a growth around 70 cm occurred in average reservoir levels). As seen from Fig. 2c,

there are not significantly changes in reservoir level of the Masjed-Soleyman dam after
the filling of reservoir was completed.

Figure 13: Subsidence of dam crest from 2003 up to 2014

4. Conclusion

After 15 years of construction and water impoundment of Masjed-Soleyman Dam,
according to the results of precise leveling observations and recording data of
instrumentation, the subsidence of dam is continued and thus, it seems that dam hasn't

received to its stable conditions, although the settlement of dam has mitigated.
However, it's seen numerous cross and longitudinal cracks on the dam crest that would
be expanded during the time. On the other hand, slip motion of

downstream embankment reveal that deformation of the dam has not stopped up to
date. One reason for this subject is that the reduction of pore water pressure in the core