O.E. (1927) and Robinson, T.W. (1958) on vascular plants in the arid western U.S., set up certain general types of indicator species, according to level of minimum depth of the water table at which water was at the maximum suction RO.
The objectives of the ambitious restoration project are to control exotic plants, particularly the phreatophyte Saltcedar - Tamarix (primarily Tamarix ramosissima and T. parviflora), and restoring critical desert California native plant community "structural elements" for a functioning flora and fauna habitat.