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
Catchment @ Gauging Station Location	Similarity Ranking1	Distance1	Annual maxima record length (years)	L-CV	L-Skewness	L-Kurtosis	Discordancy3
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
T (flood return period, years)	Logistic reduced variate( YL)	Growth factor1	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
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