For a non-reactive contaminant with a Kd of 1.0, if it takes 30 days for water to move down 50 cm in a soil with a bulk density of 1.35 g/cm3 and a volumetric water content of 0.45, how long will it take for the contaminant to move down 100 cm?

7.19. Wastewater containing 2.01 g/m³ of pesticide percolates through a soil treatment system. Adsorption has been determined to follow a Langmuir isotherm with a = 1.01 and b=0.003 m³/g. Determine the mass of pesticide that will potentially accumulate in the soil if the cross-sectional area is 20 m² and the depth is 4 m. The dry density of the soil is approximately 2400 kg/m³.

Q)In its natural state, a moist soil sample has a volume of 0.0025m3 and mass of (5) kg. After drying in the oven the soil mass reduced to 4.329 kg. If the particle density of the soil solids is 2.70 Mg/m3, calculate the moisture content, wet density, dry density, voids ratio, porosity and degree of saturation of the soil.

When the water table is deep (like 30 to 100 feet deep) and the surface soil is at field capacity, the soil water potential at field capacity for loamy soils will be about: -31 bar ) -1,000 bar O -15 bar -0.01 bar O -1/3 bar