1, land reclamation, 2-
2, capacity of floodplain,100-


3, water demand,4+
4, water extraction from bores, 5-
5, height of water table, 6-
6, consolidation of clay, 7-
7, height of London, 100-

10, global warning, 11+, 15-, 16+
11, storminess, 12+
12, storm surges, 100+
13, sea volume, 14+
14, mean sea levels, 100+
15, volume of polar ice, 13-
16, mean temperature, 13+
20, techtonic plate movement,21+
21, tilting of British Isles,22-
22, mean sea level in estuary, 100-


40, London population, 1+, 3+
41, London commerce, 1+


70, feeling of security, 40+, 41+


100, height of water level,101+
101, probability of flooding, 70-

50, height of river walls, 101-, 51-, 52+, 53+, 5-
51, amenity of Thames
52, frontager compensation
53, openings in river walls, 101+

60, barrier or barrage, 101-