Special Report 38 of the State of New Jersey, Department of Environmental Protection, Division of Water Resources uses mathematical and graphical relations to estimate flood-peak magnitudes having selected recurrence intervals ranging from 2 to 100 years for drainage basins larger than one square mile with various degrees of existing or projected urban and suburban development.Special Report 38Purpose: To develop an inexpensive and rapid method for estimating flood-peak magnitudes having recurrence intervals ranging up to 100 years for drainage basins larger than one square mile and with various degrees of urban and suburban development