203028 Agivey at Whitehill 2001
Measuring authority: RA Grid reference: 24 (IC) 882 193 Catchment area (sq km): 100.5
First year: 1972 Level stn. (m OD): 17.00 Max alt. (m OD): 461
Daily mean gauged discharges (cubic metres per second)
DAY JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
1 5.115 1.808 1.135 1.277 0.677 0.441 0.203 0.061 3.600 1.631 1.268 2.937
2 3.275 2.622 1.012 1.051 0.631 0.624 0.184 0.775 1.472 0.812 0.926 1.769
3 2.378 3.178 0.967 0.876 0.610 0.460 0.166 0.362 1.056 0.666 0.909 13.760
4 2.274 4.569 0.982 0.811 0.600 0.395 0.149 0.162 0.869 1.528 0.953 7.249
5 1.722 9.479 1.543 6.319 0.602 0.356 0.140 0.102 1.973 6.845 1.161 23.470
6 4.310 15.740 5.399 8.465 0.597 0.410 0.132 1.356 1.227 3.207 1.370 11.410
7 5.610 3.616 3.409 3.222 0.600 0.767 0.125 0.981 1.658 1.857 3.660 4.234
8 3.138 2.056 2.530 1.740 0.591 0.936 0.129 0.199 1.754 20.340 6.056 2.389
9 1.986 1.677 2.268 2.341 0.608 2.334 0.129 0.104 0.814 5.450 2.614 1.850
10 1.549 8.401 1.704 2.438 0.915 0.824 1.476 0.064 0.651 2.283 2.167 1.569
11 1.316 4.076 2.829 1.475 0.475 0.548 1.304 0.050 0.587 1.414 2.823 1.374
12 1.246 2.066 1.926 1.296 0.380 0.477 0.624 0.125 0.573 1.134 6.009 1.242
13 1.164 1.615 1.326 1.192 0.347 0.432 0.402 0.485 1.157 1.159 2.806 1.143
14 1.059 1.392 1.076 1.221 0.354 0.494 0.232 8.935 0.898 1.246 1.768 1.051
15 1.001 1.260 0.948 1.377 0.501 2.110 0.245 6.956 2.183 2.829 1.396 0.976
16 0.951 1.143 0.846 1.021 1.434 1.281 0.183 5.174 2.022 1.640 1.200 0.936
17 0.890 1.028 0.755 1.046 0.855 0.741 0.111 1.833 1.019 8.998 1.070 0.883
18 0.807 0.983 0.707 0.981 0.642 0.510 0.086 1.019 0.703 8.926 0.968 0.839
19 0.788 0.955 0.673 0.848 0.544 0.666 0.065 2.061 0.591 1.943 0.946 0.866
20 0.874 0.925 0.650 0.739 0.479 0.790 0.065 1.193 0.522 2.261 0.912 0.877
21 3.452 0.968 0.634 1.013 0.455 0.496 0.078 2.246 0.497 1.578 17.140 1.226
22 19.500 1.288 0.697 1.237 0.434 0.396 0.086 1.093 0.478 1.280 2.836 1.110
23 17.610 1.614 0.754 0.917 0.405 0.329 0.065 0.661 0.451 3.438 1.827 1.421
24 6.289 1.242 0.728 0.790 0.375 0.297 0.056 0.522 0.424 2.296 1.522 3.802
25 3.620 1.436 0.711 0.927 0.391 0.280 0.116 0.463 0.408 2.016 1.814 5.998
26 3.218 1.923 0.682 0.807 0.383 0.252 0.078 0.406 0.427 1.504 1.611 5.600
27 2.512 1.628 6.878 0.758 0.350 0.246 0.046 0.372 0.451 1.167 6.733 6.863
28 1.885 1.253 2.529 0.873 0.340 0.237 0.032 0.354 0.478 0.983 3.423 3.003
29 1.727 2.368 0.894 0.329 0.236 0.024 0.373 0.496 0.875 3.734 1.941
30 2.444 2.059 0.745 0.452 0.220 0.080 0.769 3.300 0.868 5.253 1.639
31 2.200 2.190 0.451 0.165 1.276 1.795 1.297
Average 3.416 2.855 1.707 1.623 0.542 0.619 0.225 1.307 1.091 3.031 2.896 3.701
Lowest 0.788 0.925 0.634 0.739 0.329 0.220 0.024 0.050 0.408 0.666 0.909 0.839
Highest 19.500 15.740 6.878 8.465 1.434 2.334 1.476 8.935 3.600 20.340 17.140 23.470
Monthly total
(million cu m) 9.15 6.91 4.57 4.21 1.45 1.61 0.60 3.50 2.83 8.12 7.51 9.91
Runoff (mm) 91 69 45 42 14 16 6 35 28 81 75 99
Rainfall (mm) 95 83 50 75 52 70 78 143 63 129 106 127
Statistics of monthly data for previous record (Dec 1972 to Dec 2000)
Mean Avg. 5.070 3.810 3.303 2.254 1.575 1.087 1.036 1.498 2.178 3.704 3.934 4.667
flows: Low 1.065 0.923 1.384 0.920 0.394 0.436 0.308 0.161 0.388 1.039 0.948 2.217
(year) 1997 1986 1973 1984 1984 1984 1984 1995 1991 1994 1983 1995
High 7.902 8.932 5.800 5.163 3.925 2.575 3.672 5.002 7.061 6.749 6.737 9.428
(year) 1974 1990 1989 1989 1981 1990 1998 1985 1985 1990 1982 1999
Runoff: Avg. 135 93 88 58 42 28 28 40 56 99 101 124
Low 28 22 37 24 11 11 8 4 10 28 24 59
High 211 215 155 133 105 66 98 133 182 180 174 251
Rainfall: Avg. 140 99 107 78 75 74 80 93 101 137 126 136
Low 34 5 36 22 14 37 26 15 15 51 33 58
High 221 217 191 149 179 150 161 218 219 233 196 286
Summary statistics Factors affecting runoff
2001
For 2001 For record As % of
preceding 2001 pre-2001 $ Natural to within 10% at 95 percentile flow.
Mean flow 1.914 2.841 67
Lowest yearly mean 2.187 1997
Highest yearly mean 3.793 1990
Lowest monthly mean 0.225 Jul 0.161 Aug 1995
Highest monthly mean 3.701 Dec 9.428 Dec 1999
Lowest daily mean 0.024 29 Jul 0.110 24 Jul 1989
Highest daily mean 23.470 5 Dec 71.260 21 Oct 1987
10% exceedance 3.930 6.624 59
50% exceedance 1.026 1.541 67
95% exceedance 0.117 0.363 32
Annual total (million cu m) 60.36 89.66 67
Annual runoff (mm) 601 892 67
Annual rainfall (mm) 1071 1246 86
{1961-90 rainfall average (mm) 1270}
Station and catchment description
Velocity-area station with cableway. Flows from 1975 onwards reprocessed in 2002.
Geology: mainly basalt overlain by till with some peat. Significant proportion of upland, predominantly grassland with
significant bog and some shrub heath and coniferous woodland. No urban areas or major industry.
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.