Excerpt from Irrigation Requirements of the Arable Lands of the Great Basin An acre-foot of water is the quantity of water which will cover an acre to a uniform depth of 1 foot. It is equivalent to cubic feet. An acre-inch is one-twelfth of an acre-foot. Duty of water, as defined by Sir Hanbury Brown,3 is the measure of the efficient irrigation work that water can perform, expressed in terms establishing the relation between the area of crop brought to maturity and the quantity of water. Used in its irrigation. The duty of water is usually expressed in acre -feet per acre or in the number of acres irrigable by 1 cubic foot per second. Intake or gross duty is the average duty under a canal system when all trans mission losses are included. Delivered or net duty is the duty at the margin of fields when all transmission losses are deducted. 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.