The dam slope stability under the transient condition during an extreme flood

Mountain Flood Control Reservoir (MFC Reservoir) is used to reduce the flood level in mountainous area and protect settlements downstream. The special feature of this MFC fast filling during 1-2 days, short storage time at maximum speed falling water level. Simulation operation was carried out on software Midas GTS NX. Two rockfill dam models were developed: with core screen. fluctuation taken as transformed from 1% 10% probability. change MCF creates transient seepage condition flood. During rising Reservoir, upstream slope stability gradually increases because hydrostatic pressure. After begins fall rate 0.7 m/hour, decreases. or screen location significantly affects slope. simulation showed that more stable. Due high hydraulic conductivity, prism berm dampens pore pressure