Tag Archives: Environment

Water Quality on the Deben – some current issues

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By Colin Nicholson

Introduction

At a recent River Deben Association (RDA) committee meeting, co-chair Colin Nicholson reported back from a recent visit to Anglian Water’s Wastewater Treatment Works at Martlesham Creek. The committee felt that this information was likely to be of interest to members and should be reported back. (Minutes of the meeting will also be available on the RDA website when they have been formally agreed.)  Hence this article via the RDA Journal, which does not claim to be a complete overview of the complex topic of water quality, merely a personal update on matters of current interest and actions taken to gain better information.

As organic matter trickles down over stones it is consumed by bacteria.

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Deben Fish Survey August 2022

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By Richard Verrill

It is well recognised that estuaries provide essential breeding grounds and nurseries for many fish species. They also provide corridors for migratory species. Estuaries provide a very dynamic environment with constant changes in tide, temperature and salinity. Intertidal areas provide particularly important refuge and feeding grounds for small fish.The variety of the shoreline in the Deben provides an abundance of different nursery environments with sandy beaches, shingle beaches, mudflats and salt marsh. Continue reading →

The Curlew

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by Sally Westwood

Curlew (Numenius arquata)

The tide was ebbing, almost at low tide, it was about an hour before sunset. The Deben was embellished with a clear, magical light that appears just before sunset and sunrise. Such a light produces enhanced clarity of detail in everything visible to the eye. Two Curlews1 landed on the mudflat, one each side of a gully of water draining into the shallow channel of the river.  Curlews are the largest waders in the UK, with a streaked and barred plumage, long legs and a distinctive down curved bill2, see image above. In flight, it shows a white section on the rump. The Whimbrel3 by comparison, is a similar bird to the Curlew, except it has a shorter, thicker bill, with a narrow stripe on the crown and is smaller than the Curlew, see image below. In flight, it shows a white section on the tail and back. I was alerted to the Curlew’s presence from their distinctive “Curlew, Curlew’’ calls made when they were flying. It is a call I regard as haunting in the cold, overcast days of winter. They also have a trembling, evocative bubbling call, that ends with what may be described as “dude” which carries some distance. One Curlew joined the other, on the other side of the gully. They immediately started squabbling, poking their long slender, down curved bills at each other, raising their wings slightly. Moments later, the set too ended when one returned to the other side of the gully and started searching for food, poking its bill, deep into the mud. The other Curlew started bathing and shaking out feathers, as in the image above. They may have been a pair, or an adult and youngster, however, research on Curlews has indicated that the latter relationship may be unlikely4. Since Curlews in England and Wales are in decline and such decline is driven by factors occurring during the annual breeding season.
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Is sediment increasing in the River Deben?

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by Robin Whittle

Low tide adjacent to Sutton marshes

The Deben became tidal at Felixstowe Ferry about 6000 years ago.  Today the river is tidal up to Ufford, two miles upstream of Woodbridge.  During this period sea borne sediment has built up the saltmarsh in the lower reaches to a depth of 12m.

Over the last 500 years river walls of mud and clay have been built along both sides of the tidal estuary to create arable land and grazing marshes.  Since then, sediment has continued to build up the saltmarshes and mud flats lying in front of the river walls. However, saltmarsh is now under increasing attack from wave action and shore crab burrowing. Continue reading →

AGM Report – Essex and Suffolk Rivers Trust – The State of our Rivers Report

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The East Suffolk Rivers area of 1,364 km2 encompasses the valleys, waterbodies, tributaries and estuaries of the Rivers Gipping (Orwell), Deben, Alde and Ore, Thorpeness Hundred, Yox, Blyth and Lothingland Hundred.

This area is mostly rural with significant urban areas at Felixstowe, Ipswich, Woodbridge, Wickham Market, Stowmarket, Saxmundham, Halesworth, Southwold and Kessingland.

Agriculture is the predominant land use (root veg and pig farming in the east and arable). Other pockets of land-based industry exist, including food processing, milling, malting and the manufacture of farm machinery and fertilisers.

The attached report by the Essex and Suffolk Rivers Trust looks at the current state of these Suffolks Rivers.

 

Overview of Sewage Overflows

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By Liz Hattan

The East Anglian Daily Times recently published an article on sewage overflows into Suffolk rivers (October 26th 2021), highlighting those rivers with the highest number of spills in 2020.  The River Deben had 40 spills at its Deben Road overflow, totalling 18 hours. Other rivers such as the River Thet fared worse with over 1100 hours of spills at Badwell Ash, and some sites in the other parts of the country have seen thousands of hours of spills (see Rivers Trust interactive map for local data ‘Is my river fit to play in?’  https://arcg.is/19LiCa).  Nationally, the number of spills is high with over 400,000 monitored spills (around 3.1million hours) in 2020 into English rivers and many more unmonitored ones.

So why are there are so many spills, why does it matter and what is being done to address the problem? This is a high profile issue with considerable political, media and public scrutiny. This article looks at some of the challenges. Continue reading →

Our birds on the Deben – what can we do to help them? Focus on the redshank

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By Sally Westwood

In 2021, Suffolk Coast & Heath Area of Natural Beauty (AONB) selected the Redshank1 as their flagship bird as a part of their Nature Recovery Plan2. Commendably, they called for volunteers to help with the project of protecting the Redshank including their nesting habitat. Redshanks are present on the River Deben but I have only ever seen one feeding along the river’s edge, on my river walk. I thought it might be interesting for the reader to have some insight on the background of Suffolk Coast & Heath AONB’s Nature Recovery intervention and the plight not only of the Redshank, but as we might have suspected, a considerable number of species of birds, that visit the Deben. It is not a comfortable read, however, the good news is, steps are being taken to stop the decline in species.

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How Can We Do Our Bit to Help the Climate Crisis?

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By Gary Rogers

In the light of COP26 we should all be questioning our energy use. As boat dwellers we aren’t eligible for government grants and feed in tariffs but that shouldn’t stop us taking steps to a more sustainable energy use.

As an Electronic Design Engineer living afloat for the last 30 years, I have inevitably tried and tested a multitude of off grid solutions, some more successful than others.

Tijdstroom, the Dutch barge Gary and his wife Bev live on, during the 2020-2021 winter

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The Electric Mist

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By Russell Read

This article is prompted by the enthusiastic piece from Matt Lis in The Deben Magazine for Autumn 2021 which suggests that there is a strong case for larger boats than Josh Masters’ launch to go electric.  Well, the 1907 26’6” Albert Strange-designed canoe-yawl Mist is one very classic yacht which, originally intended to be engineless, has already done this.

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