BRT	boosted regression tree
CART	classification and regression trees
DEM	digital elevation model
FO	Follow-on
GAM	Generalized Additive Model
GRACE	Gravity Recovery and Climate Experiment
GWL	Groundwater Level
GWLA	Groundwater Level Anomalies
LMRAA	lower Mississippi River alluvial aquifer
LST	land surface temperature
MAP	Mississippi Alluvial Plain
MASCON	mass concentration pixel
MERAS	Mississippi Embayment Regional Aquifer System
MODIS	Moderate Resolution Imaging Spectroradiometer
NDVI	Normalized difference vegetation index
NLCD	National Land Cover Database
NRCS	Natural Resources Conservation Service
NSE	Nash-Sutcliffe efficiency
PRISM	Parameter-elevation Regressions on Independent Slopes Model
RFM	Random Forest Model
RMSE	Root-mean Square Error
R2	correlation coefficient squared
TWS	Total Water Storage
TWSA	Total Water Storage Anomalies
USDA	United States Department of Agriculture
VIMP	Variable Importance Measures Predictive
VI	Variables of Importance
YMD	Yazoo Mississippi Delta Join Water Management District