<<

Photographic Record of River Bed and Banks July 2014

Figure 89 - Sunken timber trawler with silt and reed build-up

Figure 90­ Sunken vessel, believed to be broads cruiser, approximately 8-10m long

245

Figure 91 ­ 'Modified' Sheffield size barge at South end of HBBC moorings

Figure 92 - Barges upstream of Grovehill Lift Bridge. Nearest vessel is just floating but was open to the elements and in need of pumping out at the time of survey.

246

Figure 93 - resident prepares for the worst

Figure 94 - Sunken vessel between Beverley and . (Note: Hull Bridge Boating Club are now promoting the clearance of such vessels. On a re-visit in September 2014, four smaller boats had been removed from the channel and this example was being prepared for removal.)

247

Figure 96 - Sunken Sheffield size steel barge near . This is one of several such barges which are reported to have sunk due to ingress of rain water over a long period. Pump-out and re-floating at lowest tide may be possible for some examples, however some are reported to be holed and will need to be cut up for removal.

Figure 95 - Reed and silt build-up on and around sunken vessel near Beverley Beck. This example forms a constriction to approximately half of the river channel.

248

Figure 98 - Reed and silt build-up on and around sunken vessel near Beverley Beck. This example forms a constriction to approximately half of the river channel.

Figure 97 - Reach between and Ennerdale Bridges has heavy silt build up and channel encroachment in reed beds

249

Figure 99 - Retaining walls in an area between Stoneferry Bridge and Railway Bridge, used for mooring of 500 ton tanker barges. Operators reported that reduced usage by commercial vessels and lack of river maintenance has led to silt build-up in the channel, with reduced tidal windows where operational movements are possible

Figure 100 - Point bar build-up to the left-bank upstream of Railway Bridge. Low tide channel width is restricted to less than 8m.

250

Figure 101 - see below

Figure 102 - Two areas of failed timber piling to the right bank just downstream of Railway Bridge. The slips encroach approximately 12m into the river channel - the larger items of debris being too heavy to wash away under tidal action

251

Figure 104 - Ad-hoc masonry and concrete retaining walls with failed timber structure, right-bank approximately 200m downstream from Railway Bridge. The timbers are collecting silt and debris which is causing collapse into the channel.

Figure 103 - Heavy point-bar silt build-up against retaining wall between Railway Bridge and Wilmington Swing Bridge.

252

Figure 106 - Collapsed timber structure - believed to be former landing stage - left-bank near Glass House Row. Debris, assumed to be from this failure is present in the river channel.

Figure 105 - Failed retaining structure, right-bank with potential risk of structural damage to adjacent factory (abandoned).

253

Figure 107 - Heavy point bar silt build-up to right-bank approximately 300m downstream of Bridge

Figure 108 - Heavy build-up of silt at former entrance to dry dock, left bank near Lime Street

254

Figure 109 – Walled embankment in poor condition

Figure 110 - Retaining wall failure, left bank approximately 150m upstream from Scott Street Bridge.

255

Figure 111 - Scott Street Bridge, now disused

Figure 112 - Heavy silting up to retaining walls and debris present in the river channel, left-bank adjacent to Lime Street Depots.

256

Figure 113 - Heavy silting to channel between North Bridge and Bridge. Barge operators report that it is no longer possible to turn a vessel in this area due to restricted depth.

Figure 114 - Former entrance to Drypool Basin and Victoria Dock.

257

Figure 116 - Silt build-up to right side of channel downstream of Drypool Bridge. The trawler is permanently moored as a museum piece but photographs from the 1970s show that silt build-up in this area is at least three to four metres.

Figure 115 - Downstream of Drypool Bridge to new Scale Lane footbridge.

258

Figure 117 - Downstream of Drypool Bridge

Figure 118 - The Hull Tidal Barrier from the channel.

259

APPENDIX B: 100 year inundation volumes

1%AEP Peak Flood Inundation Volumes Option Total Reduction Drain % No Defence 24,349,152 39,569,564 63,910,100

Maintained 5,338,630 8,754,449 14,059,095

1b 4,210,485 1,128,145 21

1c 4,236,525 1,102,105 21

3b 4,210,485 939,553 18

4f 8,010,367 744,083 8

6 8,399,855 354,594 4

2014 topo 9,295,862 -541,413 -6

7b 5,127,375 211,256 4

7i 8,547,967 206,482 2

8 5,144,562 8,604,532 13,634,015 425,080 3

11 7,574,754 1,179,695 13

12 4,041,049 7,357,561 11,369,621 2,689,474 19

14a 7,268,111 1,486,338 17

14b 7,864,628 889,822 10

15b 8,903,154 -148,705 -1.7

15c 8,769,847 -15,398 -0.2

15 8,950,183 -195,734 -2.2

Combined 10hr 9,150,538 7,780,898 15

Combined 75hr 15,902,171 13,782,516 13

% reductions relate to the

260

261