wp0fdd64d9_02.jpg
[ home
[ river glaven
[ tributaries
[ conservation
[ wildlife
[ news
The Wash and North Norfolk Coast have been made a Special Area of Conservation and a European Marine Site (EMS) under the UK and European Law. The EMS boundary runs from just north of Gibraltar Point to the North Wells buoy and then extends eastwards to the West Sheringham buoy. From there is goes south to the shoreline and along the sea bank on the landward edge of the saltmarsh. The EMS covers more than 107,000 hectares of marine environment. The outfall of the Glaven contributes a flow of fresh water, important to the marine ecology.
The Environment Agency has carried out restoration work on a stretch of the river between Bayfield and Wiveton used by the river glaven Fishing Association, who are also an active part of the RGCG. This work costing £9000 was funded through the fishing licence monies received by the Environment Agency.
Cley Tidal Floodgates.

 The Environment Agency manage the floodgates at Cley. The following is a description of the banks and floodgates in the area. The gates are inspected, maintained and operated, if necessary, by Environment Agency Operations Delivery staff.
Low-lying parts of the village of Cley-Next-the-Sea are protected from tidal flooding by an earth bank.
 The Cley floodgates are situated where the tidal River Glaven passes through the flood defence bank. It has been necessary to maintain the navigation for small craft to access the quay, ruling out the use of any form of tidal gate or gravity sluices such as on the River Stiffkey for instance.
The gate control system monitors the water levels and the gates close and open automatically at a programmed tide level. The control system will also monitor, and manage, the upstream level if a large fluvial flow is present during a closure.

Full manual override of the system is possible, the gates can also be pumped closed by hand in extreme circumstances, such as loss of electrical power.
The currently installed gates are of the mitre type, similar to navigation lock gates, which use the pressure of a high tidal water level to effect a final seal. The gates are moved between their open and closed positions by hydraulic actuators.  They are locked open when not in use.
The gates typically close about five to ten times per annum. This frequency is, of course, variable due to the weather, as well as astronomical tide levels. Predicted climate changes may increase the need for, and number of, closures required in the future.

Article prepared by Steve Reeves
wp4b1f0eee_02.jpg
A copy of the Newsletters that have been published may be seen by using
wpeee79ed0_02.jpg
wp5533b116.gif
wpac62a7a6_02.jpg

Should you wish to send a message or make appropriate remarks please do so in the form below.  

 

This will be handled through a secure link and your details will not be passed  to any other body.

To see latest 2008 news   click here