Which Sonoran Desert subdivision in southeastern California is named for the Colorado River?

The Sonoran Desert subdivision in southeastern California named for the Colorado River is the Colorado Desert.

The Colorado Desert occupies southeastern California and extends into northern Baja California, Mexico. It includes the Imperial, Coachella, and Mexicali valleys, as well as landscapes around the Salton Sea and the lower Colorado River. Its name reflects the river that forms a major geographic and ecological feature of the region.

Although it is often discussed as a California desert, the Colorado Desert is not generally treated as a completely separate major desert system. It is a lower, drier subregion of the larger Sonoran Desert. That distinction helps prevent a common mix-up with the Mojave Desert, which lies farther north and has different climate and plant communities.

The region is unusually diverse for such an arid environment. Colorado Desert habitats include desert washes, palm oases, sand dunes, wetlands, and riparian corridors. Irrigation and flood-control projects along the Colorado River have also reshaped its water systems, agriculture, and wildlife habitat.