Streamflow—Water Year 2018

Fact Sheet 2019-3063
By: , and 



The maps and graphs in this summary describe national streamflow conditions for water year 2018 (October 1, 2017, to September 30, 2018) in the context of streamflow ranks relative to the 89-year period of water years 1930–2018. The illustrations are based on observed data from the U.S. Geological Survey National Streamflow Network. Annual runoff in the Nation’s rivers and streams during water year 2018 was higher than the long-term (water years 1930–2018) mean annual runoff of 9.33 inches. Nationwide, the 2018 streamflow ranked 33d highest out of the 89 years.

Suggested Citation

Jian, X., Wolock, D.M., Brady, S.J., and Lins, H.F., 2019, Streamflow—Water year 2018: U.S. Geological Survey Fact Sheet 2019–3063, 6 p.,

ISSN: 2327-6932 (online)

Study Area

Table of Contents

  • Introduction
  • National Overview
  • Regional Patterns
  • Seasonal Characteristics
  • High and Low Flows
  • Additional Information
  • References
Publication type Report
Publication Subtype USGS Numbered Series
Title Streamflow—Water year 2018
Series title Fact Sheet
Series number 2019-3063
DOI 10.3133/fs20193063
Year Published 2019
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Kansas Water Science Center
Description 6 p.
Country United States
Online Only (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details