The following databases index articles from scholarly, scientific journals.
NRCS - Natural Resources Conservation Service
From the Department of Agriculture, this site provides statistics, data, and maps for water supplies, streamflows, snowpacks and other climate information.
Water Supply Outlook for the Western United States
Published jointly by NOAA and the Colorado Basin River Forecast Center, this site provides data from the past 20 years, as well as the forecast for water supplies, streamflows, snowpacks and reservoir storage.
The official federal summary of statistics and provides over 1,400 tables of benchmark measures on the demographic, housing, social, political, and economic condition of the United States.
You have access to books from three sources -- the Library Catalog, Prospector, and WorldCat: