National Water Summary 1984--Hydrologic Events, Selected Water-Quality Trends and Ground-Water Resources

摘要

The first part of the second National Summary provides a synopsis of the hydrologic conditions and water-related events that occurred during the 1984 water year (October 1, 1983-September 30, 1984). Streamflow variations are compared to precipitation, temperature, and upper-air atmospheric pressure for the four seasonal quarters of the year to relates surface-water flows to climatic conditions. The second part contains two sections. In the section titled 'Water-Quality Issues', the occurrence of sediment, dissolved solids, nutrients, and pesticides in the Nation's streams are discussed. The occurrence and sources of nitrate in ground water also are discussed. The third part, summarizes for each State, and all U.S. territorial and trust possessions, the distribution, characteristics, and uses of principal aquifers.