Problem 1. A laboratory column of 10cm2 cross-sectional area is 1m long. Porosity is 0.25 and influent flow rate is 8 liter/day. You previously used a salt tracer test to estimate dispersivity to be 0.5mm. At time t=0, you initiate injection of a nonsorbing contaminant into the influent at a constant concentration, Co. Hints: For this problem, you will use an analytical solution to the ADE, which is given in the lecture notes. Note that the term mav in the solution in the table =Co=Cin. a. Calculate the average linear groundwater velocity [cm/ day\} 1b. Calculate the Dispersion coefficient [cm2/day]. 4. Advection (Review): Average Linear Ground Water Velocity v=AQ=AQ==8ocqDv>qD Analytical Solution C=4DtMe4Dt(xxvt)2 Transpor model