019001 Almond at Craigiehall 1999
Measuring authority: SEPA Grid reference: 36 (NT) 165 752 Catchment area (sq km): 369.0
First year: 1957 Level stn. (m OD): 22.80 Max alt. (m OD): 518
Daily mean gauged discharges (cubic metres per second)
DAY JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC
1 6.072 5.629 12.640 2.799 1.518 1.863 1.709 2.898 1.498 20.180 5.194 16.210
2 11.720 5.125 22.920 2.263 1.467 3.170 1.950 3.408 1.524 13.650 6.348 24.730
3 10.740 7.979 13.350 1.991 1.471 6.714 16.530 2.213 1.459 5.803 5.838 67.360
4 24.610 11.150 8.383 2.124 1.457 4.238 6.296 1.738 1.407 3.743 9.744 15.620
5 41.090 7.566 5.840 2.325 1.443 3.457 3.368 1.631 1.350 2.844 70.820 18.120
6 21.290 5.273 4.781 5.271 2.121 8.974 2.430 2.461 1.856 2.452 16.440 36.810
7 11.050 4.270 4.070 3.352 1.664 7.315 2.175 2.003 2.613 2.520 7.855 36.270
8 8.077 3.671 3.620 3.014 3.626 4.026 2.012 1.705 2.534 2.632 6.042 41.280
9 6.146 3.104 3.494 2.885 4.168 2.882 1.743 1.552 2.696 3.146 4.415 57.630
10 4.960 2.836 3.335 2.930 5.416 2.345 2.605 1.494 1.846 2.985 3.632 17.540
11 4.348 2.728 3.249 4.191 3.551 2.097 4.471 1.450 1.835 2.688 3.147 34.850
12 4.232 2.865 4.141 5.118 2.853 3.836 2.115 1.420 1.668 2.296 2.858 41.450
13 6.735 2.840 4.277 5.729 4.838 3.556 1.927 1.837 1.527 2.109 2.570 13.920
14 14.200 4.295 3.346 4.523 3.465 3.014 1.776 1.615 1.453 1.881 2.356 9.482
15 44.650 4.233 3.811 6.566 2.674 2.319 1.637 1.835 1.348 1.787 2.257 7.084
16 14.280 3.787 4.012 4.955 2.248 2.383 1.635 1.560 2.179 1.673 2.241 17.020
17 8.439 3.534 3.368 3.615 2.053 2.189 1.973 1.661 2.260 1.592 2.097 21.450
18 8.388 6.874 3.170 3.124 1.878 1.919 4.315 3.434 2.173 1.558 1.988 8.879
19 25.930 11.110 2.766 2.724 1.801 10.630 8.500 1.761 1.723 1.553 1.810 6.074
20 12.010 11.500 2.936 3.343 1.773 7.797 9.976 1.452 12.290 1.517 1.760 4.998
21 8.107 17.990 7.329 3.347 2.433 4.107 9.122 1.380 7.905 1.667 1.789 6.028
22 6.869 7.929 4.536 3.195 2.181 2.848 4.172 1.319 3.807 1.876 1.884 12.230
23 6.784 5.355 4.009 3.122 2.152 2.239 2.721 1.318 7.782 1.559 1.952 16.950
24 18.310 4.313 4.405 2.377 1.983 1.954 1.983 1.307 6.281 2.840 2.836 30.600
25 31.630 4.109 3.553 2.155 1.975 1.792 1.699 2.168 4.430 8.422 2.762 25.660
26 28.040 5.032 2.915 2.018 2.067 2.232 1.520 1.752 2.884 4.068 9.309 12.760
27 16.670 5.501 2.423 2.016 1.851 3.843 1.422 1.511 3.715 3.297 27.760 9.175
28 14.250 30.410 3.890 1.955 4.267 2.332 1.372 1.368 4.878 2.703 84.130 6.640
29 10.450 22.740 1.930 3.768 1.959 1.332 1.489 17.380 2.307 17.880 5.288
30 8.257 6.824 1.840 2.365 1.838 1.322 1.465 8.929 2.202 36.610 8.082
31 6.579 4.786 2.028 1.325 1.532 2.182 7.509
Average 14.350 6.822 5.965 3.227 2.534 3.662 3.456 1.798 3.841 3.604 11.540 20.570
Lowest 4.232 2.728 2.423 1.840 1.443 1.792 1.322 1.307 1.348 1.517 1.760 4.998
Highest 44.650 30.410 22.920 6.566 5.416 10.630 16.530 3.434 17.380 20.180 84.130 67.360
Monthly total
(million cu m) 38.44 16.50 15.98 8.36 6.79 9.49 9.26 4.82 9.96 9.65 29.92 55.10
Runoff (mm) 104 45 43 23 18 26 25 13 27 26 81 149
Rainfall (mm) 129 66 60 45 67 88 66 53 96 45 134 170
Statistics of monthly data for previous record (Jan 1957 to Dec 1998)
Mean Avg. 10.090 8.279 7.028 4.546 3.320 2.522 2.435 3.075 4.340 6.694 9.029 9.725
flows: Low 3.574 1.782 1.918 1.410 1.091 0.817 0.950 0.869 0.668 0.668 1.862 3.016
(year) 1963 1963 1973 1974 1961 1961 1960 1983 1959 1972 1972 1975
High 20.820 22.010 20.450 9.841 12.030 8.572 9.223 8.568 20.360 16.640 21.660 19.860
(year) 1993 1990 1994 1986 1993 1966 1958 1985 1985 1998 1963 1986
Runoff: Avg. 73 55 51 32 24 18 18 22 30 49 63 71
Low 26 12 14 10 8 6 7 6 5 5 13 22
High 151 144 148 69 87 60 67 62 143 121 152 144
Rainfall: Avg. 86 64 72 53 61 62 72 81 85 94 90 90
Low 22 11 22 8 16 15 17 19 14 23 19 21
High 178 168 170 102 134 136 173 152 195 178 190 181
Summary statistics Factors affecting runoff
1999
For 1999 For record As % of $ Abstraction for public water supplies.
preceding 1999 pre-1999 $ Flow reduced by industrial and/or
Mean flow 6.794 5.914 115 agricultural abstractions.
Lowest yearly mean 2.890 1973 $ Augmentation from effluent returns.
Highest yearly mean 8.789 1998
Lowest monthly mean 1.798 Aug 0.668 Oct 1972
Highest monthly mean 20.570 Dec 22.010 Feb 1990
Lowest daily mean 1.307 24 Aug 0.241 9 Oct 1959
Highest daily mean 84.130 28 Nov 147.200 6 Oct 1990
10% exceedance 16.360 13.410 122
50% exceedance 3.333 2.988 112
95% exceedance 1.460 0.933 156
Annual total (million cu m) 214.30 186.60 115
Annual runoff (mm) 581 506 115
Annual rainfall (mm) 1019 910 112
{1961-90 rainfall average (mm) 896}
Station and catchment description
Recorder is well sited on straight even reach with steep banks containing all recorded floods. Stable rating. Weed growth
in summer - some adjustment to stage required. Low flows substantially affected by sewage effluent esp. from Mid Calder
and Newbridge STW and six smaller STWs. Abstraction at Almondell to feed a canal. A number of storage reservoirs are
situated in the catchment.
Geology: predominantly Carboniferous rocks. Land use: rural, with extensive urban development around Livingston, esp.
industrial estates, and several small mining towns.
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