The bed of a lake consists of a deposit of silty sand with a wet unit weight of 19 (kN/m3) and a ...
The bed of a lake consists of a deposit of silty sand with a wet unit weight of 19 (kN/m3) and a coefficient of permeability of 103 (m/sec). The depth of water in the lake is 6 m. It is known that water is seeping vertically upwards through the silty sand from an underlying aquifer. a) At what rate, in per square meter of the lake bed, must water flow upwards to cause a quick condition in the silty sand? b) If it is known that water is seeping upward at the rate of 2 x 10-4 (m3/sec) per square meter, what is the vertical effective stress at a point 1m below the lake bed?
The bed of a lake consists of a deposit of silty sand with a wet unit weight of 19 (kN/m3) and a coefficient of permeability of 103 (m/sec). The depth of water in the lake is 6 m. It is known that water is seeping vertically upwards through the silty sand from an underlying aquifer. a) At what rate, in per square meter of the lake bed, must water flow upwards to cause a quick condition in the silty sand? b) If it is known that water is seeping upward at the rate of 2 x 10-4 (m3/sec) per square meter, what is the vertical effective stress at a point 1m below the lake bed?