027035 Aire at Kildwick Bridge 1997
Measuring authority: EA Grid reference: 44 (SE) 013 457 Catchment area (sq km): 282.3
First year: 1968 Level stn. (m OD): 87.30 Max alt. (m OD): 593
Daily mean gauged discharges (cubic metres per second)
DAY JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
1 2.937 1.537 19.170 3.313 1.819 1.186 1.585 1.139 2.268 1.454 1.093 4.831
2 2.691 1.552 32.000 2.997 1.547 1.107 1.522 1.169 1.409 1.198 1.074 3.898
3 2.403 2.647 14.260 2.794 1.457 1.068 1.593 0.975 2.618 0.986 1.035 3.333
4 2.218 30.130 10.020 2.604 2.445 1.030 2.921 0.884 2.944 0.909 1.059 2.982
5 2.096 10.160 8.942 2.630 40.330 1.006 1.653 0.777 2.581 0.877 1.281 2.859
6 2.136 6.906 8.086 2.498 15.800 1.072 1.260 0.734 1.935 1.305 1.301 11.810
7 2.082 12.290 6.598 2.360 11.980 1.080 1.126 0.702 2.041 2.786 1.248 7.432
8 1.964 6.879 5.433 2.170 19.990 1.140 1.028 0.675 1.510 3.527 2.016 9.751
9 1.868 7.516 4.853 1.985 10.070 1.228 1.245 0.621 1.224 10.770 2.836 17.970
10 1.798 20.250 4.425 1.793 9.001 1.105 1.027 0.604 1.073 12.520 5.788 39.060
11 1.890 13.910 3.853 1.689 9.423 2.362 0.945 0.610 1.071 8.320 9.892 25.300
12 4.181 39.350 3.417 1.620 6.858 2.589 0.948 0.583 2.798 4.482 7.584 12.770
13 3.290 22.870 3.213 1.579 8.402 1.751 1.373 0.603 2.100 3.522 4.912 8.670
14 2.899 12.980 3.833 1.529 6.900 1.493 1.199 0.632 1.908 3.332 4.086 6.646
15 2.575 8.606 4.452 1.314 4.781 1.589 1.136 0.642 3.931 6.340 3.757 5.378
16 2.362 8.207 6.898 1.270 3.979 1.378 1.110 0.625 8.759 13.260 5.370 4.557
17 2.259 29.160 6.184 1.248 3.600 1.155 1.199 0.625 6.283 7.137 5.859 4.081
18 2.135 30.910 9.297 1.212 3.291 1.074 1.039 0.619 3.102 4.447 9.010 10.400
19 2.013 36.690 8.390 1.178 3.327 1.129 0.918 0.613 2.161 3.386 8.151 8.541
20 1.848 38.700 5.653 1.146 4.554 1.313 0.856 0.599 1.691 2.686 22.840 5.892
21 1.720 35.950 4.504 1.191 3.887 1.961 0.817 0.728 1.420 2.260 16.140 4.831
22 1.874 18.840 4.335 1.139 2.846 1.680 0.793 0.711 1.249 2.002 8.326 4.366
23 1.870 20.820 9.376 1.070 2.432 1.412 0.796 0.859 1.150 1.765 6.027 11.360
24 1.871 20.930 7.773 1.372 2.141 1.228 1.137 0.897 1.074 1.463 5.646 28.500
25 2.052 26.980 6.300 3.018 1.962 4.102 0.875 0.765 1.030 1.329 4.873 37.940
26 1.877 30.160 6.762 2.098 1.866 5.498 1.423 0.717 0.945 1.275 4.660 31.550
27 1.803 23.610 7.143 1.974 1.742 2.553 1.197 0.807 0.928 1.224 5.672 14.940
28 1.641 25.080 7.135 4.945 1.607 1.949 0.916 0.855 0.920 1.148 8.830 16.220
29 1.577 5.113 3.835 1.483 1.644 0.907 1.058 0.900 1.077 9.355 11.510
30 1.592 4.198 2.349 1.329 1.605 1.029 0.889 0.997 1.101 6.330 11.320
31 1.543 3.661 1.254 0.982 2.728 1.091 13.900
Average 2.163 19.420 7.590 2.064 6.197 1.683 1.179 0.821 2.134 3.515 5.868 12.340
Lowest 1.543 1.537 3.213 1.070 1.254 1.006 0.793 0.583 0.900 0.877 1.035 2.859
Highest 4.181 39.350 32.000 4.945 40.330 5.498 2.921 2.728 8.759 13.260 22.840 39.060
Monthly total
(million cu m) 5.79 46.97 20.33 5.35 16.60 4.36 3.16 2.20 5.53 9.42 15.21 33.06
Runoff (mm) 21 166 72 19 59 15 11 8 20 33 54 117
Rainfall (mm) 10 211 70 39 98 88 74 52 71 73 96 144
Statistics of monthly data for previous record (Dec 1968 to Dec 1996----incomplete or missing months total 0.1 years)
Mean Avg. 11.390 8.735 7.640 4.798 2.670 2.036 1.702 2.921 3.525 6.318 9.981 11.160
flows: Low 2.825 3.062 1.259 0.923 0.611 0.604 0.427 0.289 0.522 0.754 1.391 1.423
(year) 1996 1993 1993 1974 1974 1970 1984 1976 1995 1995 1995 1995
High 18.450 19.660 22.520 10.970 7.757 6.209 5.927 10.910 10.360 17.570 17.020 24.080
(year) 1990 1995 1981 1986 1983 1982 1973 1985 1974 1981 1991 1993
Runoff: Avg. 108 76 72 44 25 19 16 28 32 60 92 106
Low 27 26 12 8 6 6 4 3 5 7 13 14
High 175 168 214 101 74 57 56 103 95 167 156 228
Rainfall: Avg. 126 82 101 69 67 72 74 92 101 109 123 126
Low 45 12 19 3 10 23 17 14 23 37 47 42
High 222 191 233 135 142 155 179 171 250 213 195 249
Summary statistics Factors affecting runoff
1997
For 1997 For record As % of $ Reservoir(s) in catchment.
preceding 1997 pre-1997
Mean flow 5.326 6.064 88
Lowest yearly mean 3.655 1971
Highest yearly mean 8.060 1981
Lowest monthly mean 0.821 Aug 0.289 Aug 1976
Highest monthly mean 19.420 Feb 24.080 Dec 1993
Lowest daily mean 0.583 12 Aug 0.180 23 Aug 1976
Highest daily mean 40.330 5 May 79.900 27 Oct 1980
10% exceedance 12.700 15.370 83
50% exceedance 2.182 2.891 75
95% exceedance 0.757 0.551 137
Annual total (million cu m) 168.00 191.40 88
Annual runoff (mm) 595 678 88
Annual rainfall (mm) 1026 1142 90
{1961-90 rainfall average (mm) 1153}
Station and catchment description
Velocity-area station rated by c/m cableway 150m d/s. The bridge sills provide the low flow control. Washland storage,
minor reservoirs, and the Leeds-Liverpool Canal can influence the flow pattern but small overall impact; minor net
export.
Geology: mainly Carboniferous Limestone with some Millstone Grit series. Rural catchment draining part of the eastern
Pennines.
In line with Natural Environment Research Council policy, the provision of data from the National River Flow Archive confers only a right to use the data. Ownership of the data, or the associated Intellectual Property Rights, will not normally be transferred. Data received from the NRFA must not be sold, or passed on to any third party. Reproduction is authorised, except for commercial purposes, provided the sources is acknowledged.
Through the use of quality control procedures every effort is made to maintain and improve the quality of data. However, NERC, the Environment Agency, the Scottish Environment Protection Agency and the Rivers Agency accepts no liability for any loss or damage, cost or claims arising directly or indirectly their use.