I visited, as promised, Lightwater’s detention pond yesterday afternoon. I found the water level seriously reduced, though not enough for a single Grey Heron and some Common Gulls to have a splash about and a, fruitless, search for food.
In one photo you can see the inlet to the pond, and in the distance the structure which is the outlet. Here are the photos of my visit. Enough, I think, for now about detention ponds.
Alan, a friend in Lightwater, yesterday emailed a photo of the detention pond in Lightwater, showing it full of rain water. Alan says, in his email,
At the risk of seeming obsessive, the Lightwater detention pond has been filled by the recent rain, again.
Not obsessive at all Alan, it’s a valuable service you’re doing helping to record the natural events in Lightwater. I’ll look at the state of the pond later today, after the promised rain. The detention pond protects the lower lying parts of Lightwater from receiving a rush of excessive rain water.
Here’s Alan’s photo below. My other articles of this detention pond can be read if you enter the words detention pond in the search box at the top right of the page.
Me, I do like peering into holes in the ground. I couldn’t, therefore, resist re-visiting the Broadway Road drainage works in Windlesham. To see the details about the works, Windlesham Parish Council has it HERE.
There is, however, no explanation of the what the work entails, nor a detailed explanation of the reason for the work. All I learned from questioning the workers on site was that an underground chamber associated with drainage from the M3 motorway was faulty in some way, which they said led to road flooding, necessitating its replacement.
Have to say, I remain unclear as to the purpose of the sump or chamber, and where the water goes after crossing the road. I’m presuming that it somehow finds its way into Windlesham Brook.
Here are the photos I took a couple of days ago on the current state of the works. Click on images to expand.
Alan, a friend of ours, sent me a photo of Storm Dennis’ deposit in the Lightwater detention pond alongside Red Road.
We drove past the pond last Sunday, and I noticed it was full. I didn’t remember to take a photo for evidence, so I’m delighted that Alan did, as it has filled since. Here’s his photo.
I found a definition of a detention pond on the internet, one of which we have in Lightwater, as,
Detention ponds temporarily store stormwater runoff, thereby reducing the peak rate of runoff to a stream or storm sewer. They help to prevent localized flooding…
It’s when Lightwater, and other parts of Surrey Heath suffered it’s ground water flooding in 2006 I became interested in flooding locally. I’ve looked at our small detention pond since then. I’ve photos of it being filled a number of times in 2007. Since then, to my knowledge, it hasn’t been filled with water, that is until this year when it has filled four times between early October and late November.
Yesterday I walked by the pond and found it full again. That’ll be five times this year, when for over 10 years it wasn’t needed. There was a case, in one year, when a resident complained about the grass not being cut in the pond, restricting her children’s ability to play in it. Funny how things change.
Here’s the photo of the pond I took yesterday afternoon.
What is a Foosh? It’s the medical shorthand for a Fall on an Outstreched Hand. In my case the fall resulted in broken bones in my wrist.
Most reactions are, firstly sympathy, and then silly boy. I know you’ll be curious as to how it happened. This where the silly boy becomes true. Standing of on the lower step of a badly positioned step ladder, and reaching for Christmas decorations on the top shelf in our garage the ladder went one way and me the other. Result broken bones in my wrist.
One finger typing is annoying, so have been enjoying walks in and around home. Here’s a group of images from my walks.
Re the detention pond. I met a local parish councillor on one walk, and she told me that the inlet and outlet of the detention pond are blockage free, it’s just that the ground is saturated meaning the water takes time to drain away.
Excessive rain has again filled the detention pond off Red Road in Lightwater. That’s the third time in recent months. Prior to this autumn the pond was last full in the summer of 2007. So, this autumn has been particularly wet. To my knowledge, not exhaustive I grant you, there’s been no flooding in Lightwater, since 2007, which is due to the investment in flood alleviation measures. NB: amended – in red – to make my note clearer,
Here’s my photo, taken this afternoon, of the detention pond adjacent to Red Road. I know it rained heavily last night because I was caught out iin it without a trusty umbrella.
The detention pond in Lightwater, alongside Red Road, to hold water during periods of heavy rain remains partially full, which is an indication of the volume of rain we’ve recently experienced.
I photograhed a full detention pond on October 7th this month – see HERE. I disturbed a Grey Heron when taking my photo. Lo and behold, when I took a photo a couple of days ago I disturbed a Grey Heron agin, you might be able to see it on the grass when you expand the photo.
I’m confident there are no fish in the pond, maybe there’s a worm or too. So, I think the Heron would be advised to choose a pond with fish.
Walking home yesterday fom a walk over our local heathland I noticed that the detention pond in Lightwater, near the junction of Lightwater Road and Red Road, was full.
The detention pond fills when the road drainage systems are overloaded in very heavy rain. It must therefore have poured down on Saurday evening. Here’s the evidence.
UPDATE: Checking back the previous time I noticed the was pond filled was in 2007.
I’m worried that I’m tempting fate here, by saying Surrey Heath is well prepared for flood events at this time. Really, I should say the eastern part of Surrey Heath is well prepared, from the map below the River Blackwater and the Blackwater Valley have flood alerts.
Here’s the latest Environment Agency flood warning/alert map for our local area.
Readers here will, I’m sure will know of my keen interest in flood alleviation as Lightwater has in the recent past suffered from flooding. See HERE why its important, and most recent article on the subject HERE, if you’re interested.
I’m somewhat out of date on knowing where the most recent flood alleviation works have occurred, or are planned in the Borough. I’d better do some research. Will tell you what I’ve found.