WATER RESOURCES OF EAST-CENTRAL IOWA

K.D. Wahl, G.A. Ludvigson, G.L. Ryan, and W.C. Steinkampf

Iowa Department of Natural Resources, Geological Survey Bureau,
Water Atlas No. 6, 1978, 91 p.

TABLE OF CONTENTS

Foreword
Glossary
Acknowledgments
Introduction

East-Central Iowa
Population
The land surface
The hydrologic cycle
Climate

Surface-water resources

Streamflow variability
Average discharge
Low-flow frequency
Floods
Regulated Streams
Flood inundation

Groundwater resources

The aquifers

Surficial aquifers
The bedrock surface
Bedrock aquifers
Depths to the bedrock aquifers
Thickness of the bedrock aquifers
Use of maps to predict depths of drilling

Water in aquifers

Water levels

Water levels in surficial aquifers
Water levels in bedrock aquifers

Well yields

Yields from surficial aquifers
Yields from bedrock aquifers

Water quality

Surface-water quality

Sediment in streams
Chemical quality

Groundwater quality

Surficial aquifers
Mississippian aquifer
Devonian aquifer
Silurian aquifer
Cambrian-Ordovician aquifer
Dresbach aquifer

Water use

Water withdrawals

Water withdrawals in urban areas
Water use by irrigators and the mineral industry
Sources of withdrawals
Resource depletion
Source depletion

Future demands

Water resources laws and regulations
Conclusions

Availability and quality of water from streams
Availability and quality of water from surficial aquifers
Availability and quality of water from bedrock aquifers

Selected references