Overview

Figure 4.1
Figure 5.1
Figure 6.1
Figure 7.1a
Figure 7.1b
Figure 7.1c
AppendixC2
AppendixC3
AppendixC4
AppendixC5


Sheet 1: AppendixC2

Bin Brook @ Cam Confluence - Catchment Descriptors





NGR of inflow point TL44500, 58850

AREA 17.48

FARL 0.99

PROPWET 0.25

ALTBAR 33

ASPBAR 102

ASPVAR 0.39

BFIHOST 0.35

DPLBAR 5.62

DPSBAR 20.7

LDP 12.11

SAAR 555

SAAR4170 553

SPRHOST 50.6

URBCONC 0.55

URBEXT1990 0.03

URBLOC 0.94

RMED-1H 10.8

RMED-1D 28.2

RMED-2D 35.2

Sheet 2: AppendixC3

Bin Brook @ Cam Confluence - Pooling Group Details






Catchment @ Gauging Station Location Similarity Ranking1 Distance1 Annual maxima record length (years) L-moments2 Discordancy3
L-CV L-Skewness L-Kurtosis
30014 (Pointon Lode @ Pointon) 1 0.3 21 0.39 0.23 0.26 0.91
36010 (Bumpstead Brook @ Broad Green) 2 0.37 27 0.38 0.15 0.09 0.67
36009 (Brett @ Cockfield) 3 0.41 25 0.28 -0.07 0.03 0.67
25010 (Baydale Beck @ Mowden Bridge) 4 0.49 17 0.25 0.05 0.12 0.6
33030 (Clipstone Brook @ Clipstone) 5 0.58 13 0.34 -0.08 0.1 1.67
31025 (Gwash South Arm @ Manton) 6 0.59 15 0.25 0.17 0.19 0.92
38026 (Pincey Brook @ Sheering Hall) 7 0.66 20 0.3 -0.09 0.04 0.89
35003 (Alde @ Farnham) 8 0.7 26 0.26 -0.1 0.01 0.96
37012 (Colne @ Poolstreet) 9 0.78 22 0.39 0.17 0.17 0.63
37016 (Pant @ Copford Hall) 10 0.78 21 0.38 0.33 0.31 0.93
33809 (Bury Brook @ Bury Weir) 11 0.79 15 0.35 -0.03 0.11 1.25
36004 (Chad Brook @ Long Melford) 12 0.82 27 0.34 0.3 0.37 1.13
31023 (West Glen @ Easton Wood) 13 0.85 22 0.4 0.4 0.31 1.3
36012 (Stour @ Kedington) 14 0.86 18 0.31 0.26 0.33 0.76
20002 (West Peffer Burn @ Luffness) 15 0.87 26 0.32 -0.02 0.11 0.49
32003 (Harpers Brook @ Old Mill Bridge) 16 0.9 25 0.3 -0.02 0 0.87
37013 (Sandon Brook @ Sandon Bridge) 17 0.92 30 0.26 0.04 0.12 0.35
36002 (Glem @ Glemsford) 18 0.93 31 0.23 0.18 0.33 1.29
35004 (Ore @ Beversham Bridge) 19 0.94 29 0.29 0.09 0.12 0.17
53019 (Woodbridge Brook @ Crab Mill) 20 0.94 12 0.41 0.23 0.21 0.89
37014 (Roding @ High Ongar) 21 0.97 30 0.3 0 0.21 0.73
37011 (Chelmer @ Churchend) 22 1 31 0.28 0.03 0.16 0.07
37003 (Ter @ Crabbs Bridge) 23 1.07 30 0.23 -0.04 0.21 0.58
35008 (Gipping @ Stowmarket) 24 1.1 29 0.3 0.06 0.05 0.64
33012 (Kym @ Meagre Farm) 25 1.14 33 0.21 -0.12 0.17 0.96
33018 (Tove @ Cappenham Bridge) 26 1.17 22 0.19 0.01 0.17 0.98
33031 (Broughton Brook @ Broughton) 27 1.19 19 0.3 0.14 0.16 0.2
34007 (Dove @ Oakley Park) 28 1.22 28 0.39 0.16 0.07 0.93
27051 (Crimple @ Burn Bridge) 29 1.24 22 0.18 0.04 0.16 1.82
41018 (Kird @ Tanyards) 30 1.25 13 0.28 0.18 0.14 1.03
32008 (Nene/Kislingbury @ Dodford) 31 1.25 27 0.15 -0.13 0.26 2.12
30012 (Stainfield Beck @ Stainfield) 32 1.26 10 0.32 0.28 0.44 1.98
36005 (Brett @ Hadleigh) 33 1.27 31 0.3 0.12 0.14 0.15
33045 (Wittle @ Quidenham) 34 1.27 25 0.37 0.2 0.1 0.66
41020 (Bevern Stream @ Clappers Bridge) 35 1.29 13 0.14 0.02 0.21 2.62
34002 (Tas @ Shotesham) 36 1.29 36 0.39 0.43 0.38 1.79
34010 (Waveney @ Billingford Bridge) 37 1.3 26 0.35 0.07 0 1.14
36007 (Belchamp Brook @ Bardfield Bridge) 38 1.32 30 0.39 0.09 0.05 1.1
38002 (Ash @ Mardock) 39 1.32 53 0.28 0.02 0.21 0.34
37020 (Chelmer @ Felsted) 40 1.33 24 0.21 -0.22 0.21 3.02
40017 (Dudwell @ Burwash) 41 1.36 17 0.23 -0.03 0.22 0.6
29005 (Rase @ Bishopbridge) 42 1.36 13 0.37 0.29 0.34 1.13
54036 (Isbourne @ Hinton on the Green) 43 1.37 21 0.26 -0.06 0.15 0.46
38004 (Rib @ Wadesmill) 44 1.37 35 0.3 0.17 0.24 0.14
41016 (Cuckmere @ Cowbeech) 45 1.41 15 0.44 0.45 0.17 2.6
36008 (Stour @ Westmill) 46 1.42 33 0.3 0.29 0.34 0.99
31010 (Chater @ Fosters Bridge) 47 1.43 26 0.29 0.05 0.03 0.9
Weighted means


0.3 0.09 0.17
Total station years of data

1134











notes






1. Gauging stations are ranked according to their hydrological similarity (Distance) to the subject site.






2. L-CV is a measure of the variability of AM data.






L-skewness represents the skewness of AM data.






L-kurtosis indicates the shape of the AM data distribution.






3. Discordancy denotes potentially unusual/influential sites where the distribution of AM data may be markedly different to the group average (i.e. inclusion of AM data may exert a major influence of the calculation of L-moment ratios).







Sheet 3: AppendixC4

Bin Brook - Pre-feasibility Flood Frequency Curves



T (flood return period, years) Logistic reduced variate( YL) Growth factor1 Qmed
Statistical method2 Rainfall/Runoff method3
2.33 0.29 1.000 2.91 3.41
5 1.39 1.469 4.27 5.18
10 2.20 1.770 5.15 6.52
25 3.18 2.165 6.29 8.50
50 3.89 2.474 7.19 10.22
100 4.60 2.797 8.13 11.95
200 5.29 3.139 9.13 14.01
500 6.21 3.621 10.53 17.40





notes



1. For the statistical approach, the flood frequency curve values were fitting using growth factors derived from a Generalised Logistic (GL) distribution.



2. Statistical method uses catchment descriptors and a Qmed of 2.9 m3/s.



3. FEH rainfall/runoff method, Tp, SPR & BF from catchment descriptors. Rainfall storm profile: Winter, duration: 17hrs.




Sheet 4: AppendixC5



Sheet 5: A44_1































































































































































































































































































































































BIN BROOK FLOOD ALLEVIATION










Date November 2002





Pre-Feasibility Scale N.T.S.





Model node locations

Figure No. 4.1






Sheet 6: A45_1
















































































BIN BROOK FLOOD ALLEVIATION




Date November 2002
Pre-Feasibility Scale N.T.S.
Location of rain gauges in relation to Bin Brook catchment Figure No. 5.1

Sheet 7: A46_1










BIN BROOK FLOOD ALLEVIATION




Date November 2002
Pre-Feasibility Scale N.T.S.
October 2001 Flood Envelope Figure No. 6.1

Sheet 8: A37_1a



























BIN BROOK FLOOD ALLEVIATION



















Date November 2002






Pre-Feasibility



Scale N.T.S.





Bin Brook Long Section (Design event stage profiles)





Figure No. 7.1a

Sheet 9: A37_1b



























































































































BIN BROOK FLOOD ALLEVIATION



















Date November 2002






Pre-Feasibility



Scale N.T.S.




Gough Way Relief Channel Long Section (Design event stage profiles)




Figure No. 7.1b

Sheet 10: A47_2










BIN BROOK FLOOD ALLEVIATION




Date November 2002
Pre-Feasibility Scale N.T.S.
50 & 200 year Flood Envelopes Figure No. 7.2