1. the ogallala aquifer is a major aquifer underlying parts of eight states in the high plains of er level declines. assume the pumping was at the rate of 830 million ft/day, the us. extensive pumping of groundwater from that aquifer during 1960-1980 has led natural discharge from the aquifer was 10 million ft/day, and the recharge (including irrigation return flow) to the aquifer was 510 million ft /day sd a) what was the rate at which the aquifer was depleted (i. e. difference between recharge and discharge)? north omaha b) over a 20-year period, how much groundwater did the aquifer lose? dernver ks ichita co northern high ins plains tx high pfains