“…For the western third of the state, where there is very little surface water, there has been great variability in access to water resources, particularly the Ogallala-High Plains aquifer system. Although irrigation has helped mitigate agricultural sensitivity to climate variability (Bloomquist, et al, 2002, following on Bell, 1942, it may actually increase vulnerability in the long term (Dregne, 1980). As the groundwater resource upon which the region has become reliant is depleted, agriculture will be forced to change again in response to this stress .…”