Using Kd = 188 , calculate the retardation factor using the equation 1 + P b K d / Q = R where R is termed retardation factor. Assume the aquifer has an effective porosity of 0.25, and a bulk density of a sandy soil of 1.3 g/cm3 . Calculate the retarded velocity of the contaminant, using the retardation factor you calculated and assuming the aquifer has a retardation effect on the contaminant for the velocity calculated from the previous question.

For each of the three cases shown in Figure 3 determine: a). the pressure head, elevation head, total head, and cumulative head loss at the entrance, exit and point A of the soil sample. For each case, set the datum at the tail water elevation. b). the discharge velocity and the seepage velocity if the soil's permeability coefficient is 0.10 cm/s and the porosity is 40%. POTTAWA c). the discharge velocity and the seepage velocity if the soil's permeability coefficient is 0.001 cm/s and the void ratio is 0.600. BAINA LE DROIT 3 m 4m + 2m A. Case I ez ilise ROTÉGÉ PAR 3 m 1m 4m est cadre A. Case II sirez 1 m e mate ificati Figure 2 dood 3 m 5 m TED MATERIA Case III urse are rected by cop not harmission to up nox clarification, ple 1 m

Hydrology..

If dry unis weight equal to 1.74 g/cm3, and the moist unit weight is 2 g/ cm3. find the water content% for this sample

cademic) X = 4 km If aquifer hydraulic gradient, hydraulic conductivity and effective porosity are found to be 0.4, 0.5 m/day and 0.2 respectively, determine how long the contaminants have been in the aquifer (in years)? 1 year = 365 days %3D