Question

A contaminated plume is found having capture zone type curve Q/BU = 2000 m. U is the regional groundwater velocity, Q is pumping rate and B is the aquifer thickness. The aquifer also has a hydraulic conductivity of 3 × 10-5 cm/sec, a hydraulic gradient of 0.003 and a storavity of 0.005. The aquifer is 30 m thick. The diameter of the well is 10 inch and the equation for non-equilibrium condition is:

họ - h = 2.3Q 4nT log 2,75 2.25Tt r2S

Where T is transmissivity, r is the radius of the well, t is the pumping duration and ho – h is the drawdown.

1. What is the groundwater velocity?
2. What is the Pumping rate?
3. What is the Transmissivity?
4. What is the drawdown this aquifer can support with the pumping rate of (a) after 2 year of pumping?
5. Now assume recharge rate is 1.5 m/yr, what is drawdown after 2 year of pumping?
6. Now assume, hydraulic gradient change to 0.01, what is drawdown after 2 year without no recharge and with 1 m/yr recharge rate.

Answer 1

Answer 2

How about part e and f?