LOCATION.-- Lat 41°42'28", long 87°57'46" (NAD of 1983), in NE1/4SW1/4 sec.10, T.37 N., R.11 E., Du Page County, Hydrologic Unit 07120004, on concrete abutment on right bank, 50 ft upstream from bridge on Bluff Road at south edge of Argonne National Laboratory, 2.5 mi northeast of Lemont, and at mile 1. | |
DRAINAGE AREA.-- 13.0 mi2 | |
PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE | |
DISCHARGE: December 1985 to current year. | |
STAGE: Water years 1994 to current year. | |
PARTIAL RECORD: Annual maximum, water years 1961-79. | |
SURFACE-WATER QUALITY | |
MISCELLANEOUS: Water year 2000; contaminants in streambed sediments, water year 2000. | |
PRECIPITATION: April 1986 to current year. | |
BIOLOGICAL | |
ALGAE: Water year 2000. | |
BENTHIC MACROINVERTEBRATES: Water year 2000. | |
FISH: Water year 2001. | |
HABITAT: Water year 2000-01. | |
REVISED RECORDS.-- WDR IL-77-1: 1961-76(M). | |
GAGE.-- Water-stage recorder, phone telemeter, unheated tipping-bucket rain gage, and crest-stage gage. Datum of gage is 630.00 ft above NGVD of 1929 (629.71 ft NAVD 1988). Oct. 11, 1961, to Sept. 30, 1976, crest-stage gage on bridge 50 ft downstream at datum 11.22 ft higher. | |
REMARKS.-- For precipitation records, snowfall-affected data can result during cold weather when snow fills the rain-gage funnel and then melts as temperatures rise. Snowfall-affected data are subject to appreciable errors. | |
EXTREMES FOR PERIOD OF RECORD.-- | |
SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,070 ft3/s, July 18,1996, gage height, 17.53 ft; no flow at times in most years. | |
PRECIPITATION: Maximum daily total, 6.17 in., July 17, 1996. | |
REMARKS FOR CURRENT YEAR.--Algae community samples were collected as part of the National Water-Quality Assessment program (NAWQA) in the lower Illinois River Basin. A quantitative sample was collected in accordance with NAWQA protocols (Cuffney and others, 1993). Reach A begins 85 feet downstream of Old Bluff Road and continues downstream for 492 feet. | |
| PERIPHYTON ALGAE, QUANTITATIVE, RTH (Richest-targeted habitat, cobbles or snags) | |||
|---|---|---|---|
| [sp., species; Chlorophyta, Green algae; Cyanophyta, Blue-green algae; Chrysophyta, Golden algae, for example diatoms; Cryptophyta, Cryptophytes; Euglenophyta, Euglenoids; Pyrrhophyta, Dinoflagellates; Rhodophyta, Red algae] | |||
| Quantitative sample | |||
| Phylum | |||
| Taxon | Cells (number/cm2) | Biovolume (biovolume/cm2) | |
| Reach A 7/11/2000 | |||
| Chrysophyta | |||
| Achnanthidium affine (Grunow) Czarnecki | 8432.38731 | 593786.7178 | |
| Achnanthidium minutissimum (Kützing) Czarnecki | 2409.2528 | 130997.3807 | |
| Amphora inariensis Krammer | 3613.88046 | 559732.5504 | |
| Amphora pediculus (Kützing) Grunow | 140941.3379 | 14061707.41 | |
| Caloneis bacillum (Grunow) Cleve | 8432.38731 | 3624137.039 | |
| Cocconeis placentula Ehrenberg | 1204.6264 | 877632.4162 | |
| Cocconeis placentula var. euglypta (Ehrenberg) Cleve | 1204.6264 | 827175.9923 | |
| Cocconeis placentula var. lineata (Ehrenberg) Van Heurck | 1204.6264 | 1349188.995 | |
| Navicula cryptotenella Lange-Bertalot ex Krammer et Lange-Bertalot | 4818.50686 | 1246141.785 | |
| Navicula minima Grunow | 31320.29646 | 1249582.97 | |
| Navicula recens Lange-Bertalot | 3613.88046 | 1810745.6 | |
| Navicula tantula Hustedt | 9637.01371 | 488211.3818 | |
| Nitzschia frustulum (Kützing) Grunow | 113234.9206 | 5635797.037 | |
| Reimeria sinuata (Gregory) Kociolek et Stoermer | 3613.88046 | 606403.1647 | |
| Rhoicosphenia abbreviata (Agardh) Lange-Bertalot | 22887.90915 | 11635080.01 | |
| Sellaphora seminulum (Grunow) Mann | 4818.50686 | 354409.0408 | |
| Cyanophyta | |||
| Homoeothrix janthina (Bornet et Flahault) Starmach | 102351.1598 | 795453.3381 | |
| Phormidium granulatum | 78342.86307 | 6478786.171 | |
| Rhodophyta | |||
| Unknown Rhodophyte Florideophycidae (chantransia) | 118777.8892 | 237722602.7 | |
Table of Contents |
Introduction |
Station Descriptions |
Surface-Water Data |
Ground-Water Data |
Meteorological Data |
Biological Data |