Excerpt from Ground-Water, Surface-Water, and Water-Chemistry Data, Black Mesa Area, Northeastern Arizona, 1997: Prepared in Cooperation With the Arizona Department of Water Resources and the Bureau of Indian Affairs The Black Mesa monitoring program is designed to document long-term effects of ground-water pumping from the N aquifer by industrial and municipal users. The N aquifer is the major source of water in the -square-mile Black Mesa area, and the ground water occurs under confined and unconfined conditions. Monitoring activities include continuous and periodic measurements of l) ground-water pumpage from the confined and unconfined parts of the aquifer, (2) ground-water levels in the confined and unconfined parts of the aquifer, (3) surface - water discharge, and (4) chemistry of the ground water and surface water. In 1997, ground-water withdrawals for industrial and municipal use totaled about acre-feet, which is less than a l-percent increase from 1996. Pumpage from the confined part of the aquifer increased by about 2 percent to acre-feet, and pumpage from the unconfined part of the aquifer decreased by about 4 percent to acre-feet. Water-level declines in the confined part during 1997 were recorded in 5 of 12 wells; however, the median change was a rise of about foot as opposed to a decline of feet for 1996. Water-level declines in the unconfined part were recorded in 7 of 15 wells, and the median change was foot in 1997 as Opposed to a decline of foot in 1996. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.