Fig. 4: NDVI vs DTG plots and ZDTG vs ZNDVI plots for groundwater-dependent vegetation across California.
From: Establishing ecological thresholds and targets for groundwater management
a–h NDVI vs DTG plots (left) and ZDTG vs ZNDVI plots (right) for groundwater-dependent vegetation across California (a,b; n = 3,113 polygons with statewide CASGEM monitoring well data in grey/black); n = 26 polygons with Kern River Preserve monitoring well data in blue) and for three major groundwater-dependent vegetation genera: Salix spp. (c,d; n = 569 polygons), Populus spp. (e,f; n = 367 polygons) and Quercus spp. (g,h; n = 532 polygons).
