Publications

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This report is an index of all surface-water, ground-water, and quality-of-water data which have been or are now being collected on a continuous or periodic basis, by the U. S. Geological Survey and the cooperating agencies in the Delaware River basin, to September 30, 1951. The index is divided into two principal sections, the surface-water section relating to streams and the ground-water section

Engineers have long appreciated the fact that it is seldom economically sound to design hydraulic structures either for the maximum previous floods or for the computed maximum probable floods, unless failure of such structures involves loss of life or serious property damage. Such floods may not occur more often, on an average, than once in a hundred or pos- sibly even several thousand years. In p

An abundant supply of water is available to the Lake Erie Shore region in Pennsylvania. Lake i£rie furnishes an almost inexhaustible supply of water of satisfactory chemical quality. Small quantities of water are available from small streams in the area and from the ground. A satisfactory water supply is one of the factors that affect the economic growth of a region. Cities and towns must have ade

The floods of July 1942 in north-central Pennsylvania and adjacent areas in New York were record-breaking on most of the smaller streams. They followed unprecedented rains that amounted to as much as 35 inches at some points during a storm that for the most part lasted less than 12 hours at any point. In the area of heavy rainfall, peak flood discharges were much greater than for the floods of Mar

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