The ogallala aquifer is a major aquifer underlying parts of eight states in the high plains of us. extensive pumping of groundwater from that aquifer during 1960-1980 has led groundwater level declines. assume the pumping was at the rate of 830 million ft iday the natural discharge from the aquifer was 10 million ft /day, and the recharge (including irrigation return flow) to the aquifer was 510 million ft3/day. 3o-10+ 5t0 a) what was the rate at which the aquifer was depleted (i. e. difference between recharge and sd wy 30ー、kim tmda omcha b) over a 20-year period, how much groundwater did the aquifer lose? ne 133 34 420 ks chita co nm northern hgh plains ok ral plal tx