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autostatistical/tests/data/NN 04000 48400.Flood estimation report.2015-08-28.md
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# Flood Estimation Report | ||
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Date: 28/08/2015 | ||
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## Input data | ||
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River: Unknown | ||
Location: Unknown | ||
NGR outlet: 204000, 748400 | ||
NGR centroid: 207378, 751487 | ||
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### Catchment descriptors | ||
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Source: CEH (2009) | ||
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Descriptor | Value | Descriptor | Value | Descriptor | Value | ||
:------------|-----------:|:------------|-----------:|:------------|----------: | ||
AREA | 30.09 | FPEXT | 0.0369 | SPRHOST | 53.35 | ||
ALTBAR | 367 | LDP | 11.50 | URBCONC1990 | | ||
ASPBAR | 247 | PROPWET | 0.79 | URBEXT1990 | 0.0000 | ||
ASPVAR | 0.17 | RMED-1H | 13.9 | URBLOC1990 | | ||
BFIHOST | 0.394 | RMED-1D | 72.0 | URBCONC2000 | | ||
DPLBAR | 6.56 | RMED-2D | 112.4 | URBEXT2000 | 0.0000 | ||
DPSBAR | 356.3 | SAAR | 2810 | URBLOC2000 | | ||
FARL | 0.986 | SAAR4170 | 2969 | | | ||
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### National River Flow Archive (NRFA) data | ||
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Source: http://nrfaapps.ceh.ac.uk/peak_flow/WINFAP-FEH_v3.3.4.zip | ||
Version: 3.3.4 | ||
Published: August 2014 | ||
Retrieved: 28/08/2015 | ||
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## Median annual flood (QMED) | ||
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Methology: Kjeldsen, Jones & Bayliss (2008, eqs. 8.1 & 8.2), Kjeldsen (2010, eq. 8), Kjeldsen, Jones & Morris | ||
(2014), Open Hydrology Contributors (2015) | ||
Analysis type: Catchment descriptors regression model with nearby catchments adjustment | ||
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QMED, rural: 45.6 m³/s | ||
URBEXT, 2015: 0.0000 | ||
Adj. factor: 1.000 | ||
QMED, urban: 45.6 m³/s | ||
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### QMED donor catchments | ||
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Donor river | Donor location | Distance (km)| Observed/Model | Power | ||
:-------------------|:-------------------------------|-------------:|---------------:|-----: | ||
Nevis | Claggan | 20 | 1.377 | 0.163 | ||
Strae | Glen Strae | 21 | 0.996 | 0.160 | ||
Allt Leachdach | Intake | 31 | 0.539 | 0.088 | ||
Falloch | Glen Falloch | 39 | 1.673 | 0.059 | ||
Tay | Kenmore | 50 | 1.032 | 0.029 | ||
Tay | Pitnacree | 53 | 0.939 | 0.025 | ||
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Adj. factor: 1.027 | ||
QMED: 47 m³/s | ||
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## Growth curve | ||
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Methology: Kjeldsen, Jones & Bayliss (2008, eqs. 8.3‒8.12 & 8.16), Kjeldsen (2010, eqs. 10 & 11), Open Hydrology | ||
Contributors (2015) | ||
Analysis type: Pooled catchments analysis (ungauged) | ||
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### Growth curve donor catchments (pooling group) | ||
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Donor river | Donor location | Sim. dist. | Rec. length | L-var. | Weight | L-skew | Weight | ||
:-------------------|:-------------------------------|-----------:|------------:|-------:|-------:|-------:|------: | ||
Strae | Glen Strae | 0.33 | 29 | 0.093 | 0.094 | -0.108 | 0.078 | ||
East Dart | Bellever | 0.71 | 48 | 0.162 | 0.080 | 0.082 | 0.078 | ||
Sprint | Sprint Mill | 0.73 | 43 | 0.197 | 0.078 | 0.191 | 0.076 | ||
Rhondda Fawr | Tynewydd | 0.91 | 11 | 0.120 | 0.055 | -0.087 | 0.040 | ||
West Dart | Dunnabridge | 0.93 | 31 | 0.171 | 0.069 | 0.122 | 0.068 | ||
Ettrick Water | Brockhoperig | 1.02 | 41 | 0.203 | 0.069 | 0.276 | 0.073 | ||
Fowey | Trekeivesteps | 1.12 | 43 | 0.220 | 0.067 | 0.290 | 0.074 | ||
Walkham | Horrabridge | 1.15 | 39 | 0.212 | 0.066 | 0.240 | 0.072 | ||
Harwood Beck | Harwood | 1.16 | 43 | 0.189 | 0.066 | 0.251 | 0.073 | ||
Nevis | Claggan | 1.17 | 24 | 0.136 | 0.061 | 0.180 | 0.061 | ||
De Lank | De Lank | 1.18 | 46 | 0.232 | 0.066 | 0.241 | 0.075 | ||
St Neot | Craigshill Wood | 1.25 | 12 | 0.245 | 0.051 | 0.373 | 0.042 | ||
Mellte | Pontneddfechan | 1.28 | 41 | 0.171 | 0.063 | 0.122 | 0.072 | ||
Warleggan | Trengoffe | 1.30 | 43 | 0.268 | 0.063 | 0.287 | 0.073 | ||
Megget Water | Henderland | 1.36 | 13 | 0.216 | 0.051 | 0.074 | 0.045 | ||
Total/weighted avg. | | | 507 | 0.186 | 1.000 | 0.172 | 1.000 | ||
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L-var., urban: 0.186 | ||
L-skew, urban: 0.172 | ||
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### Flood frequency curve | ||
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Distribution: GLO | ||
Parameters: 1.000, 0.177, -0.172 | ||
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AEP (%) | Growth factor | Flow (m³/s) | ||
-------:|--------------:|-----------: | ||
50.0 | 1.00 | 47 | ||
20.0 | 1.28 | 60 | ||
10.0 | 1.47 | 69 | ||
5.0 | 1.68 | 79 | ||
3.3 | 1.81 | 85 | ||
2.0 | 1.98 | 93 | ||
1.3 | 2.13 | 100 | ||
1.0 | 2.24 | 100 | ||
0.5 | 2.53 | 120 | ||
0.2 | 2.97 | 140 | ||
0.1 | 3.34 | 160 | ||
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## References | ||
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CEH (2009). FEH CD-ROM 3 (Software). Wallingford: Centre for Ecology & Hydrology. | ||
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Kjeldsen, T. R., Jones, D. A. & Bayliss, A. C. (2008). *Improving the FEH statistical procedures for flood frequency | ||
estimation* (No. SC050050). Bristol: Environment Agency. | ||
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Kjeldsen, T. R. (2010). *Modelling the impact of urbanization on flood frequency relationships in the UK*. Hydrology | ||
Research, 41 (5). pp. 391‒405 | ||
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Kjeldsen, T. R., Jones, D. A. & Morris, D. G. (2014). *Using multiple donor sites for enhanced flood estimation in | ||
ungauged catchments*. Water Resour. Res., 50, pp. 6646‒6657 | ||
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Open Hydrology Contributors (2015). OH Auto Statistical. http://docs.open-hydrology.org/projects/oh-auto-statistical |
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<?xml version="1.0" encoding="UTF-8" standalone="yes"?> | ||
<!-- Created by FEH CD-ROM 3 at 13:05:09 GMT on Wed 10-Jun-2015 --> | ||
<FEHCDROMExportedDescriptors version="2.0.000" appVersion="3.0.000"> | ||
<CatchmentDescriptors grid="GB" x="204000" y="748400" mgr="NN 04000 48400"> | ||
<CatchmentCentroid grid="GB" x="207378" y="751487" mgr="NN 07378 51487" /> | ||
<area>30.09</area> | ||
<altbar>367</altbar> | ||
<aspbar>247</aspbar> | ||
<aspvar>0.17</aspvar> | ||
<bfihost>0.394</bfihost> | ||
<dplbar>6.56</dplbar> | ||
<dpsbar>356.3</dpsbar> | ||
<farl>0.986</farl> | ||
<fpext>0.0369</fpext> | ||
<fpdbar>0.825</fpdbar> | ||
<fploc>0.676</fploc> | ||
<ldp>11.5</ldp> | ||
<propwet>0.79</propwet> | ||
<rmed_1h>13.9</rmed_1h> | ||
<rmed_1d>72.0</rmed_1d> | ||
<rmed_2d>112.4</rmed_2d> | ||
<saar>2810</saar> | ||
<saar4170>2969</saar4170> | ||
<sprhost>53.35</sprhost> | ||
<urbconc1990>NaN</urbconc1990> | ||
<urbext1990>0.0</urbext1990> | ||
<urbloc1990>NaN</urbloc1990> | ||
<urbconc2000>NaN</urbconc2000> | ||
<urbext2000>0.0</urbext2000> | ||
<urbloc2000>NaN</urbloc2000> | ||
</CatchmentDescriptors> | ||
<CatchmentAverageDDFValues grid="GB" x="204000" y="748400" mgr="NN 04000 48400"> | ||
<c>-0.01884</c> | ||
<d1>0.53527</d1> | ||
<d2>0.5086</d2> | ||
<d3>0.49952</d3> | ||
<e>0.25011</e> | ||
<f>2.69933</f> | ||
</CatchmentAverageDDFValues> | ||
<PointDDFValues grid="GB" x="204000" yx="748000" mgr="NN 04000 48000"> | ||
<c_1_km>-0.019</c_1_km> | ||
<d1_1_km>0.566</d1_1_km> | ||
<d2_1_km>0.54</d2_1_km> | ||
<d3_1_km>0.602</d3_1_km> | ||
<e_1_km>0.251</e_1_km> | ||
<f_1_km>2.608</f_1_km> | ||
</PointDDFValues> | ||
</FEHCDROMExportedDescriptors> |
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