019001 Almond at Craigiehall 1998
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 6.134 3.864 9.451 3.341 3.822 10.100 3.162 5.957 5.944 4.849 4.915 6.095
2 7.019 3.316 14.060 3.658 2.985 5.965 2.759 3.864 4.389 3.090 47.450 5.382
3 27.070 3.322 12.010 20.730 2.596 4.133 2.480 12.530 3.459 2.403 57.470 4.827
4 24.490 4.242 7.642 25.990 2.502 3.192 2.236 6.475 2.870 6.191 16.380 4.164
5 21.930 4.294 6.153 29.340 3.212 2.768 2.164 4.510 2.507 20.870 13.130 3.753
6 15.450 5.804 9.300 12.810 3.691 5.272 1.972 4.731 3.283 7.420 9.603 3.735
7 15.880 9.185 15.990 12.800 16.910 5.126 1.906 18.760 2.570 4.666 7.640 4.385
8 14.430 7.057 11.840 46.970 8.688 6.476 1.972 24.920 2.696 3.497 6.391 8.744
9 28.910 12.700 7.302 19.420 5.011 14.850 2.099 7.731 8.857 18.010 11.630 5.750
10 11.630 10.160 14.630 10.650 3.660 30.080 2.178 5.258 5.965 9.118 9.060 7.647
11 7.977 49.980 12.820 7.548 3.592 14.900 2.128 4.078 3.760 7.417 7.535 7.809
12 6.670 18.070 7.558 5.761 3.438 7.884 26.320 3.493 4.534 5.274 9.122 7.844
13 17.760 10.380 5.704 4.818 2.901 5.245 14.760 3.205 4.686 12.930 11.760 10.470
14 29.900 13.480 4.454 4.228 2.706 4.413 5.553 3.541 3.119 10.890 7.361 19.330
15 13.840 10.960 3.886 4.070 2.488 5.113 3.850 3.337 2.689 11.640 5.737 10.200
16 10.810 7.820 3.647 4.689 2.271 4.693 3.541 3.227 2.256 58.670 4.700 7.752
17 32.000 6.010 3.532 4.083 2.135 4.099 6.175 5.821 2.016 40.390 4.190 8.897
18 31.120 5.242 3.033 3.387 2.087 3.445 4.643 3.590 2.243 13.870 4.264 9.685
19 16.710 4.594 2.855 3.191 2.084 3.342 29.310 2.989 1.915 10.010 4.151 6.313
20 9.302 4.653 2.698 3.119 2.438 2.775 15.100 7.020 1.779 21.980 5.047 4.758
21 8.198 4.901 2.474 3.003 2.100 3.130 9.518 9.495 1.771 42.520 6.317 4.246
22 9.066 5.238 2.344 3.123 1.980 2.984 8.441 4.163 1.720 25.380 23.700 5.606
23 19.440 8.907 2.345 3.014 1.886 3.372 7.605 6.950 1.703 20.120 10.240 6.769
24 11.740 7.828 3.652 3.092 1.802 3.160 5.422 7.483 1.640 38.720 13.520 7.196
25 8.402 4.937 3.030 3.760 1.737 2.771 4.051 4.280 1.603 17.530 7.939 41.490
26 6.379 4.337 7.823 5.265 1.847 3.807 3.719 3.481 1.628 10.850 21.940 53.420
27 5.400 13.480 5.368 4.540 2.393 18.310 3.177 2.818 4.755 36.150 12.540 28.620
28 4.699 7.665 3.731 7.691 3.172 10.250 2.995 2.456 3.689 26.180 25.640 11.130
29 4.260 4.974 6.383 14.410 5.181 4.008 2.268 2.778 11.530 9.794 7.980
30 4.119 6.924 5.143 8.356 3.787 6.420 2.125 2.697 7.590 7.124 8.302
31 3.942 3.989 13.760 7.943 2.204 5.960 6.419
Average 14.020 9.015 6.620 9.187 4.279 6.687 6.374 5.895 3.184 16.640 12.880 10.600
Lowest 3.942 3.316 2.344 3.003 1.737 2.768 1.906 2.125 1.603 2.403 4.151 3.735
Highest 32.000 49.980 15.990 46.970 16.910 30.080 29.310 24.920 8.857 58.670 57.470 53.420
Monthly total
(million cu m) 37.56 21.81 17.73 23.81 11.46 17.33 17.07 15.79 8.25 44.56 33.38 28.40
Runoff (mm) 102 59 48 65 31 47 46 43 22 121 90 77
Rainfall (mm) 118 86 70 102 81 97 120 88 52 178 116 92
Statistics of monthly data for previous record (Jan 1957 to Dec 1997)
Mean Avg. 9.989 8.262 7.038 4.433 3.296 2.420 2.339 3.006 4.368 6.452 8.935 9.704
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 15.120 21.660 19.860
(year) 1993 1990 1994 1986 1993 1966 1958 1985 1985 1981 1963 1986
Runoff: Avg. 73 55 51 31 24 17 17 22 31 47 63 70
Low 26 12 14 10 8 6 7 6 5 5 13 22
High 151 144 148 69 87 60 67 62 143 110 152 144
Rainfall: Avg. 85 64 72 52 60 61 71 80 86 92 89 90
Low 22 11 22 8 16 15 17 19 14 23 19 21
High 178 168 170 89 134 136 173 152 195 177 190 181
Summary statistics Factors affecting runoff
1998
For 1998 For record As % of $ Abstraction for public water supplies.
preceding 1998 pre-1998 $ Flow reduced by industrial and/or
Mean flow 8.789 5.844 150 agricultural abstractions.
Lowest yearly mean 2.890 1973 $ Augmentation from effluent returns.
Highest yearly mean 8.199 1986
Lowest monthly mean 3.184 Sep 0.668 Oct 1972
Highest monthly mean 16.640 Oct 22.010 Feb 1990
Lowest daily mean 1.603 25 Sep 0.241 9 Oct 1959
Highest daily mean 58.670 16 Oct 147.200 6 Oct 1990
10% exceedance 19.300 13.210 146
50% exceedance 5.357 2.921 183
95% exceedance 2.076 0.925 225
Annual total (million cu m) 277.20 184.40 150
Annual runoff (mm) 751 500 150
Annual rainfall (mm) 1200 902 133
{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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