Prehistoric Irrigation Canals

This image is a 1922 map of prehistoric irrigation systems throughout the Salt River Valley. The map indicated where the Salt River meets the Gila River. The map labels and indicates the location of both the prehistoric irrigation canals and prehistoric settlements. Further, the map shows locations of petroglyph sites. The image also includes a short pamphlet outlining the history of the Hohokam existence and important time lines.

本图像为1922年绘制的盐河谷（Salt River Valley）全域史前灌溉系统分布图。该地图标注了盐河与希拉河（Gila River）的交汇处，同时标明了史前灌溉渠与史前定居点的位置。此外，该地图还标注了岩画遗址（petroglyph sites）的分布点位。本图像还附带一份简短小册子，概述了霍霍坎文明（Hohokam）的存续历史与重要时间线。