Course: Science Subtest I
Lesson: Earth's Resources
Topic: California's Fresh Water      Page 22 of 39  

Modifications to California's freshwater sources

Centuries-old irrigation ditches built by Native Americans are known in some areas, such as those built by ancestors of the Agua Caliente Cahuilla Indians near Palm Springs.

In the 18th century, Spanish settlers, in conjunction with building California's missions, built larger scale irrigation systems that supplied river water for drinking and bathing, for irrigating orchards, vineyards and vegetable crops, and for driving mills to grind wheat.


Washbasin at Mission Santa Barbara, built about 1806.
Source: Wikipedia