Peak Streamflow Trends in Iowa and Their Relation to Changes in Climate, Water Years 1921–2020
Scientific Investigations Report
2023-5064-C
Prepared in cooperation with the Illinois Department of Transportation, Iowa Department of Transportation, Michigan Department of Transportation, Minnesota Department of Transportation, Missouri Department of Transportation, Montana Department of Natural Resources and Conservation, North Dakota Department of Water Resources, South Dakota Department of Transportation, and Wisconsin Department of Transportation
Links
- Document: Report (8.9 MB pdf) , HTML , XML
- Larger Work: This publication is Chapter C of Peak streamflow trends and their relation to changes in climate in Illinois, Iowa, Michigan, Minnesota, Missouri, Montana, North Dakota, South Dakota, and Wisconsin
- Dataset: USGS National Water Information System database - USGS water data for the Nation
- Data Releases:
- USGS data release - Peak streamflow data, climate data, and results from investigating hydroclimatic trends and climate change effects on peak streamflow in the Central United States, 1921–2020
- USGS data release - USGS monthly water balance model inputs and outputs for the conterminous United States, 1895–2020, based on ClimGrid data
- Download citation as: RIS | Dublin Core
Abstract
This study summarizes trends and change points for peak and daily streamflow in Iowa from water years 1921 through 2020. Nonstationarity in peak streamflow in Iowa can include monotonic trends, change points, and changes in seasonality. Spatial patterns of nonstationarity in peak streamflow, daily streamflow, and monthly climatic data (observed and modeled) were examined across four temporal periods. Upward trends in peak and daily streamflow were detected across central and eastern Iowa, from 1921 onward and were likely predominantly driven by increases in annual and seasonal precipitation during this time.
Suggested Citation
O’Shea, P.S., 2024, Peak streamflow trends in Iowa and their relation to changes in climate, water years 1921–2020, chap. C of Ryberg, K.R., comp., Peak streamflow trends and their relation to changes in climate in Illinois, Iowa, Michigan, Minnesota, Missouri, Montana, North Dakota, South Dakota, and Wisconsin: U.S. Geological Survey Scientific Investigations Report 2023–5064, 55 p., https://doi.org/10.3133/sir20235064C.
ISSN: 2328-0328 (online)
Study Area
Table of Contents
- Acknowledgments
- Abstract
- Introduction
- Purpose and Scope
- Description of Study Area
- Brief History of U.S. Geological Survey Peak-Streamflow Data Collection in Iowa
- History of Statistical Analysis of Peak Streamflow and Nonstationarity
- Review of Research Relating to Climatic Variability and Change
- Hydrologic and Climate Data
- Methods
- Results of Streamflow and Climate Analyses
- Discussion and Implications for Peak-Flow Frequency Analysis in Iowa
- Nonstationarity Implications for Flood-Frequency Analysis
- Uncertainty and Limitations
- Summary
- References Cited
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Peak streamflow trends in Iowa and their relation to changes in climate, water years 1921–2020 |
| Series title | Scientific Investigations Report |
| Series number | 2023-5064 |
| Chapter | C |
| DOI | 10.3133/sir20235064C |
| Year Published | 2024 |
| Language | English |
| Publisher | U.S. Geological Survey |
| Publisher location | Reston, VA |
| Contributing office(s) | Central Midwest Water Science Center |
| Description | Report: viii, 55 p.; 2 Data Releases; 1 Dataset |
| Country | United States |
| State | Iowa |
| Online Only (Y/N) | Y |
| Additional Online Files (Y/N) | N |
| Google Analytic Metrics | Metrics page |