Station list     Available data
ROCK RIVER BASIN


05439000       SOUTH BRANCH KISHWAUKEE RIVER AT DE KALB, IL

 

LOCATION.-- Lat 41°55'52", long 88°45'34" (NAD of 1927), in SW1/4NE1/4 sec.22, T.40 N., R.4 E., De Kalb County, Hydrologic Unit 07090006, on left bank 100 ft downstream from bridge on State Highway 38 in De Kalb, and at mile 48.5.
 

DRAINAGE AREA.-- 77.7 mi2.
 

PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE
 

DISCHARGE: July 1925 to October 1933, October 1979 to current year.
 

STAGE: Water years 1995-2002.

SURFACE-WATER QUALITY
 

SEDIMENT: October 1979 to September 1981.
 

REVISED RECORDS.-- WDR IL-80-1: Drainage area.
 

GAGE.-- Water-stage recorder, phone telemeter, and crest stage gage. Datum of gage is 831.88 ft above NGVD of 1929. Mar. 23, 1980, to Sept. 30, 1983, at datum 3.0 ft higher. Oct. 1, 1979, to Mar. 22, 1980, nonrecording gage at same site at datum 3.0 ft higher. Prior to Sept. 30, 1933, nonrecording gage at same site at datum 3.40 ft higher.
 

EXTREMES FOR PERIOD OF RECORD.--

SURFACE-WATER DISCHARGE AND STAGE: Maximum discharge, 3,500 ft3/s, July 2, 1983, gage height, 15.80 ft; present datum; no flow, several days.

SUSPENDED-SEDIMENT CONCENTRATIONS: Maximum daily mean, 1,650 mg/L June 13, 1981; minimum daily mean, 10 mg/L Mar. 9, 1980.

SUSPENDED-SEDIMENT LOADS: Maximum daily, 3,070 tons June 13, 1981; minimum daily, 0.04 ton Oct. 15, 1979.
 

REMARKS FOR CURRENT YEAR.-- Records good except those for estimated daily discharges, which are poor.
DISCHARGE, in CFS, WATER YEAR OCTOBER 2001 TO SEPTEMBER 2002
DAILY MEAN VALUES
DAY OCT NOV DEC JAN FEB MAR APR MAY JUN JUL AUG SEP
 
1 2.8 26    30  e13    12    50  47  87  83  26      3.3   1.5  
2 2.6 22    26  e12    10    e47  51  122  80  25      0.45 1.6  
3 2.2 21    27  e13    e9.6 44  45  104  84  20      0.17 1.1  
4 5.0 20    26  14    e9.0 52  40  92  683  19      20      1.0  
5 10    18    26  15    e8.4 58  41  87  1040  18      17      1.7  
 
6 3.9 17    25  15    8.1 47  41  85  732  18      6.9   0.89
7 3.4 16    23  14    8.9 46  61  78  434  15      2.4   0.58
8 3.4 15    22  13    10    166  167  76  309  13      0.85 0.54
9 3.7 15    20  15    11    311  341  81  236  12      0.47 0.41
10 5.1 14    19  14    25    214  237  63  192  11      0.33 0.58
 
11 4.3 13    18  12    37    157  179  146  181  11      0.32 0.81
12 12    11    20  12    38    134  148  608  153  8.9   1.1   0.54
13 38    12    37  13    36    117  125  535  135  7.6   35      0.39
14 37    16    38  12    37    104  114  360  123  6.3   25      0.56
15 23    14    33  11    38    96  103  274  109  5.3   13      0.28
 
16 16    14    30  9.0 41    78  92  267  98  4.1   8.4   0.05
17 12    11    32  e8.6 38    76  82  293  91  2.7   4.4   0.03
18 11    11    30  e8.2 35    71  77  227  81  2.5   2.2   1.7  
19 8.1 11    30  8.1 55    65  76  190  73  2.9   1.1   4.8  
20 7.3 11    27  8.8 151    64  70  164  66  2.4   0.49 4.3  
 
21 8.2 10    24  9.6 163    59  78  147  59  1.8   0.91 1.8  
22 19    9.5 26  9.5 129    54  72  136  56  1.2   93      2.4  
23 169    10    29  11    109    e51  65  132  53  0.80 41      1.1  
24 147    32    25  11    96    e49  70  118  49  0.86 27      0.72
25 132    50    29  10    83    47  62  121  46  0.62 14      0.55
 
26 92    40    22  9.6 72    47  54  104  46  0.59 6.9   0.50
27 62    37    23  9.2 64    47  66  100  41  2.5   5.2   0.41
28 46    30    22  9.1 57    47  98  96  35  1.7   3.7   0.36
29 36    30    19  8.8 ---    60  89  94  32  2.2   2.7   0.38
30 32    33    16  8.8 ---    53  81  92  30  1.5   1.9   0.35
 
31 29    ---    e14  9.5 ---    46  ---  90  ---  2.5   1.5   ---     

TOTAL 983.0 589.5 788 346.8 1391.0 2557 2872 5169 5430 246.97 340.69 31.93
MEAN 31.71 19.65 25.42 11.19 49.68 82.48 95.73 166.7 181.0 7.967 10.99 1.064
MAX 169 50 38 15 163 311 341 608 1040 26 93 4.8
MIN 2.2 9.5 14 8.1 8.1 44 40 63 30 0.59 0.17 0.03
CFSM 0.41 0.25 0.33 0.14 0.64 1.06 1.23 2.15 2.33 0.10 0.14 0.01
IN. 0.47 0.28 0.38 0.17 0.67 1.22 1.38 2.47 2.60 0.12 0.16 0.02
e Estimated
STATISTICS OF MONTHLY MEAN DATA FOR WATER YEARS 1926 - 2002, BY WATER YEAR (WY)
MEAN 24.30 57.30 56.96 42.76 80.40 101.2 108.0 94.79 93.91 57.37 35.45 28.84
MAX 119 246 261 154 245 292 309 221 257 322 383 337
(WY) 1927 1986 1983 1993 2001 1993 1993 1995 1993 1983 1987 1980
MIN 0.22 1.43 0.93 4.10 6.14 12.3 18.6 11.4 9.97 1.52 0.51 0.33
(WY) 1934 1998 1998 2000 1931 1996 1996 1931 1930 1988 1931 1988

SUMMARY STATISTICS FOR 2001 CALENDAR YEAR FOR 2002 WATER YEAR WATER YEARS 1926 - 2002
ANNUAL TOTAL 19876.67 20745.89
ANNUAL MEAN 54.46 56.84 64.98    
HIGHEST ANNUAL MEAN 151          1993
LOWEST ANNUAL MEAN 13.4       1931
HIGHEST DAILY MEAN 992          Feb 25 1040          Jun 5 2520          Jul 3 1983
LOWEST DAILY MEAN 0.27     Sep 2 0.03     Sep 17 0.00     A
ANNUAL SEVEN-DAY MINIMUM 0.35     Aug 27 0.38     Sep 11 0.03     Sep 30 1931
MAXIMUM PEAK FLOW 1090          Jun 5 3500          Jul 2 1983
MAXIMUM PEAK STAGE 9.86     Jun 5 15.80 B Jul 2 1983
INSTANTANEOUS LOW FLOW 0.00     Sep 16
ANNUAL RUNOFF (CFSM) 0.70 0.73 0.84    
ANNUAL RUNOFF (INCHES) 9.52 9.93 11.36    
10 PERCENT EXCEEDS 138      133      160         
50 PERCENT EXCEEDS 26      25      28         
90 PERCENT EXCEEDS 0.93 1.2   1.9      

A - Several days.

B - Present datum.


Table of Contents

Introduction

Station Descriptions

Surface-Water Data

Ground-Water Data

Meteorological Data

Biological Data