THE BURE AND ITS TRIBUTARIES. 
261 
while the waters were under daily investigation, it is possible 
to arrive at an approximate estimate of the extent to which 
such a tide penetrates the Bure and its tributaries. 
The high tide of March 13th. 1906, rose 11 feet at Yarmouth 
Bar instead of the normal 6. It was attributed to the strong 
North-westerly wind which was blowing at the time, and which 
hindered the subsequent ebb to such an extent that the water 
did not recede as far as the normal high-water mark. The 
flow then set in, and, starting from this high level, again 
reached 11 feet, an occurrence for which the records of the 
preceding 15 years showed no parallel. 
The maintenance of this high water level for about 36 hours 
naturally caused a tremendous rush of salt water up the river, 
as the results recorded in Table XIII. show. 
TABLE XIII.— RIVER BURE, 
During abnormally High Tide, March, 1906. 
Date. 
Time. 
Position of Tide. 
Sample taken at 
Salinity. 
% 
of Sea 
Water. 
March 13 
F.M. 
4 5 
Slack Water 
Coltishall 
3-04 
O 
3 10 
Slack Water 
Wroxham 
3-04 
O 
2 50 
Slack Water 
Swan Inn, Horning 
25-73 
2 
2 35 
Slack Water 
Horning, Proposed Intake 
287 
22 
1 55 
Running up 
Thurne Mouth 
906 
70 
1 25 
Running up 
Acle .... 
1249 
95 
1 5 
Running up 
Acle .... 
I 3 W 
IOO 
March 18 
Yarmouth Beach . 
1303 
IOO 
TABLE XIV.— RIVER BURE. 
Showing subsidence of Abnormal Tide. 
Date. 
Sample taken from 
Salinity. 
Temporary 
Hardness. 
Permanent 
Hardness. 
March 13th, ’06 
Horning, Proposed Intake 
373 
IO 
54 
March 15th, ’06 
Horning, Proposed Intake 
80 
3-3 
23-3 
March 22nd, ’06 
Horning, Proposed Intake 
IO.4 
20 
8.7 
May 2nd, '06 
Horning, Proposed Intake 
5-5 
10.3 
9.0 
