Fig. 1: Colorado River Basin map, hydrologic parameters, and representative geologic cross-sections. | Communications Earth & Environment

Fig. 1: Colorado River Basin map, hydrologic parameters, and representative geologic cross-sections.

From: Multidecadal drought impacts on the Lower Colorado Basin with implications for future management

Fig. 1

This map illustrates the Upper and Lower Colorado River Basin, along with naturalized flow at Lees Ferry (km3/yr, 2002–2024, Supplemental Table 6), mean annual precipitation (P, km3/yr; 2002–2024; Supplementary Table 3b), runoff (Roff, km3/yr 2002–2024; Supplementary Table 5b), surface water (SW) and groundwater (GW) water withdrawals (WW) (km3/yr, 2000–2020, Supplementary Table 11). The Active Management Areas that receive CAP water (Phoenix, Pinal, and Tucson) are indicated, highlighting key groundwater management regions. Two cross sections are presented: A–A’ in the upper right and B–B’ in the lower right illustrate topographic and geological variations across the Plateau and alluvial basin physiographic provinces of the Lower Basin57.

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