Excerpt from Historical Flow Regimes and Canyon Bottom Vegetation Dynamics at Walnut Canyon National Monument, ArizonaThe Water Rights Branch of the Water Resources Division, National Park Service, contracted with the Cooperative Park Studies Unit1 to determine the historical ¿ow regimes and canyon bottom vegetation dynamics at Walnut Canyon National Monument (w aca), Arizona. The prehistoric and historic ¿ow regimes for Walnut Canyon as well as their effect upon the associated vegetation are not well documented or understood. Since the turn of the century, hydrologic conditions have changed due to construction of dams and other water diversions. Concomitantly, changes in riparian and aquatic habitat and composition have been cm-going Brian This study endeavors to understand this complex hydrologic-vegetative system through field research, resurvey of past studies, and synthesis.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.