Heybridge 100.6mm
Hadleigh 96.0mm
Canvey Island 92.4mm
Southend 78.9mm
Laindon (here) 78.8mm
Ashingdon 66.9mm


Unofficial local amateur stations but there is a clear geographic patern
emerging with the highest centered around Benfleet which does have an
official longstanding COL station so I look forward to seeing that.
Some pics he-
http://www.southendstandard.co.uk/ne...ooding/?ref=mr

Nothing compared to major floods elsewhere in recent years but bear in
mind the ground is (was!) very dry and there are no major rivers
involved and it is the driest part of the Country.

Dave

Have just checked my 5" gauge for the rain yesterday 24th 109mm Maldon, Essex.
From 1520 to 1920 95mm.
Was this a super cell? The radar echo did not move for a long time over Maldon.

Colin Lush

"Dave Cornwell" wrote in message
...

Nothing compared to major floods elsewhere in recent years but bear in
mind the ground is (was!) very dry and there are no major rivers involved
and it is the driest part of the Country.

It does fit with what Lord Chris Smith called "a new kind of rain"!
http://www.dailymail.co.uk/news/arti...ncy-chief.html

Cheers, Alastair.

On 25/08/2013 12:40, Dave Cornwell wrote:
Heybridge 100.6mm
Hadleigh 96.0mm
Canvey Island 92.4mm
Southend 78.9mm
Laindon (here) 78.8mm
Ashingdon 66.9mm


Unofficial local amateur stations but there is a clear geographic patern
emerging with the highest centered around Benfleet which does have an
official longstanding COL station so I look forward to seeing that.
Some pics he-
http://www.southendstandard.co.uk/ne...ooding/?ref=mr


Nothing compared to major floods elsewhere in recent years but bear in
mind the ground is (was!) very dry and there are no major rivers
involved and it is the driest part of the Country.

Dave

Down to the drainage system, pure and simple.

Rule of thumb design criteria for drainage systems (that's the pipe work
AND getting the water out of them) across most of the country:
Short term event: 25mm in one hour;
Prolonged event: 100mm in 24 hours;
Long term event: 50mm in 24 hours lasting more than 24 hours.

(There's a problem with these rules. It takes time for a system to clear
itself, so any further rain is going to top up the system quicker than
the start of a rainfall event. Under those circumstances it is very
difficult to predict how quickly the water will disperse. For example,
200mm in 48 hours won't be manageable, as won't 50mm in 2 hours. Again,
rule of thumb, it will take about 4-5 days to clear 25mm of rainfall
completely from the system.)

The way it rained in Essex, it never stood a chance. And those rules are
for individual events. If it gets within 75% of any two rules together,
there's going to be a problem. And being so close to sea level over such
an area, don't expect the drains to clear completely for at least a
couple of weeks. Another downpour in the next few days and the flooding
will come on even quicker. You've been warned!

On a further note, fairly shortly developers are going to have to review
those figures and up the amount of water drainage systems have to cope
with. The Government has already issued guidelines upping those figures
by 20% or more for the next 50 years, due to predicted climate change
and urban spread. Unfortunately, existing drainage doesn't come under
those guidelines.

jim, Northampton