Underground Water Resources of Iowa (Classic Reprint)

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Excerpt from Underground Water Resources of IowaChapter IV. - Artesian phenomena - Continued. Head of artesian waters - Continued. Factors affecting head - Continued. Elevation of surface at the well. Age of well Hydraulic gradient Ground-water level. Relative heads of Iowa aquifers Yield of artesian wells. Measurement. Permanence of yield. Factors Factors relating to the well Casing and packing -diameter of drill hole Factors relating to the water beds Pressure Thickness Texture and porosity Crevices Clogging Overdraft Remedies for decreased yield Statistics of decreased yield chapter V. Chemical composition of underground waters, by W. S. Hendrixson Introduction. Nature of analyses Statement of analytical results. Form Of analyses Recomputation of former analyses. Chemical composition of water by districts.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.