U.S. Geological Survey 1998 Annual Report on Compact Disc
Illinois District


Brief Table of Contents

Introduction

Preface
Discontinued Stations Discontinued Surface-Water Discharge or Stage-Only Stations
Discontinued Surface-Water-Quality Stations with Daily Records
Discontinued Surface-Water-Quality Stations with Records Not Less Than Quarterly Differences between Compact Disc and Printed Annual Report
How to Use Data on this Compact Disc
Purpose, Scope, and History
Cooperation
Summary of Hydrologic Conditions
Special Networks and Programs
Explanation of the Records Station Identification Numbers Downstream Order System
Latitude-Longitude System Stage and Discharge Collection and Computation
Presentation Station Manuscript
Data Table of Daily Mean Values
Statistics of Monthly Mean Data
Summary Statistics
Partial-Record Sites Identifying Estimated Daily Discharge
Accuracy of Discharge Records
Other Records Available Surface-Water Quality Classification
On-Site Measurements and Sample Collection
Water Temperatures
Sediment
Laboratory Measurements
Presentation Ground-Water Levels Collection and Computation
Presentation Ground-Water Quality Collection and Computation
Presentation Precipitation Collection and Computation
Presentation Biological Collection and Processing
Presentation Definition of Terms
References Cited
Publications on Techniques of Water-Resources Investigations
Remarks Codes
Conversion Factors and Vertical Datum

Surface-Water Data

Stage Current Year
Historic Data
Station Manuscripts Discharge Current Year
Historic Data
Station Manuscripts Partial-Record Sites Crest Stage
Miscellaneous Measurements Quality Sediment Concentration Current Year
Historic Data
Station Manuscripts Sediment Discharge Current Year
Historic Data
Station Manuscripts Chemical and Microbiological Current Year
Station Manuscripts Miscellaneous Water Quality
Streambank Material Particle-size Composition in the Lower Illinois River Basin
Streambed Material Particle-size Composition in the Lower Illinois River Basin

Ground-Water Data

Water Levels Current Year
Station Manuscripts Water Quality

Precipitation Data

Rain gages in and near DuPage County
Station Manuscripts

Biological Data

Fish Communities in the Lower Illinois River Basin
Benthic Macroinvertebrate Communities in the Lower Illinois River Basin

Introduction

Surface-Water Data

Ground-Water Data

Precipitation Data

Biological Data