Date of this Version
Poster presentation, UCARE Research Fair, Spring 2020, University of Nebraska-Lincoln.
The High Plains Aquifer comprises eight states of Nebraska, Oklahoma, Texas, New Mexico, Wyoming, Colorado, South Dakota with an area of 175,000 square miles. High Plains Aquifer (HPA) has been the primary source of water supply for irrigation in this region. Groundwater depletion varies across the region of the aquifer due to differences in surface water interaction with groundwater, water recharge, precipitation temperature and hydrological characteristics of the aquifer. With the uncertainty in the future of climate, we expect extreme climatic events such as drought. The drought is associated with dry and hot weather in which irrigation plays a vital role to mitigate its effects on crop yield. In this paper, we develop a county-level regression that allows us to estimate the effect of saturated thickness to sustain crop yields during severe drought for the entire HPA and highlight the role of irrigation in response to climate change. The model provides inferences on how drought affects saturated thickness effects on yield.