Река Брент: История и происхождение лондонского потока.

River in London, England
the American YouTuber

The River Brent is a river in west and northwest London, England, and a tributary of the River Thames. 17.9 mile (29 km) in length, it rises in the Borough of Barnet and flows in a generally south west direction before joining the Tideway stretch of the Thames at Brentford.

A letter from the Bishop of London in 705 suggesting a meeting at Breġuntford, now Brentford, is the earliest record of this place and probably therefore that of the river, suggesting that the name may be related to the Celtic *brigant meaning "high" or "elevated", perhaps linked to the goddess Brigantia.

In the early twentieth century, it was suggested that the River Thames, after descending through Oxfordshire, entering the London Basin near the Goring Gap and running north east from there, continued in that direction prior to the ice advance, past Watford and along the line of the Vale of St Albans. This hypothesis has since been confirmed by much subsequent research. That "proto Thames" river received tributaries from the south. At least one of those tributaries traversed what is today a dissected plateau which lies to the south east of the Vale of St Albans. This plateau stretches from Bushey Heath to Northaw and beyond, and is capped over wide areas, at altitudes ranging from about 150 metres to 130 metres, by a fairly thin (average 3 metres) layer of sand and gravel known as Pebble Gravel (or, in places, Stanmore Gravel). Although flint is the main component of this gravel, it has been known since the late nineteenth century that it also contains in places a notable quantity of chert derived from Lower Greensand Beds in the Weald. It was suggested early on that this "pointed to the former existence of streams from that area". S. W. Wooldridge later suggested that it was in fact "a river of major dimensions" (which) "entered from the south" that was responsible for transporting much of this chert to areas which are now north of the River Thames. It was clear from the broad course which Wooldridge plotted for this river that it was an ancestor of the River Mole (and/or River Wey). In 1994, D. R. Bridgland proposed that Pebble Gravel (or Stanmore Gravel) which is located on Harrow Weald Common (near Bushey Heath) was deposited by an ancestral Mole Wey, and that that river was a tributary of the River Thames at a time when the latter river was flowing to the north west of the Vale of St Albans. That could have been nearly two million years ago. He also suggested that similar gravel, located further north east near Northaw at a slightly lower altitude, was also deposited by an ancestral Mole Wey, but at a later date (which could have been around 1.75 million years ago). At those times, the topography of the country in what is today the Brent catchment area would have been very different from today's topography, because the Pebble Gravel was laid down on a valley floor, whereas today it occupies the highest ground in the area. The relief has thus been inverted. But, in 1979, P. L. Gibbard mapped younger deposits, known as Dollis Hill Gravel and named after one of the locations where this deposit is found, which were also laid down by an ancestral Mole Wey river. (This river is also referred to in places as the "proto Mole Wey".) These deposits are found at what is today the so called Finchley Gap, and to the north east and south west of it. Dollis Hill Gravel is found, for example, south west of the Gap at Hendon and Horsenden Hill, and north east of the Gap over wide areas from Southgate to Goff's Oak. Today, the highest of those deposits rest at an altitude of around 100 metres (for example at Muswell Hill). So the proto Mole Wey valley around Finchley, in the sense of being an area of lower ground lying between higher ground on either side (for example, at Mill Hill and Hampstead Heath, both at altitudes of over 120 metres today), must have existed by the time those highest deposits of Dollis Hill Gravel were laid down. That could have been around one million years ago. The proto Mole Wey river which laid down the Dollis Hill Gravel thus flowed along a line broadly similar to that of today's River Brent, but in the opposite direction, from south west to north east. The gradient of the floor of that valley in the area now occupied by the Brent catchment was low probably no more than 50 cm per kilometre.

The number, and courses, of the tributary streams which flowed into the proto Mole Wey river prior to the Anglian glaciation, in the area currently covered by the Brent catchment area, are not known with any certainty. But it is known that, elsewhere, some tributaries of rivers which were themselves severely disrupted by that glaciation today still follow broadly the same lines as their pre glaciation valleys. This is the case, for example, for certain tributaries of the upper River Lea, such as the Rivers Mimram and Stort. So it seems reasonable to suggest that parts at least of the network of tributary streams which flowed into the proto Mole Wey river, in the area currently covered by the Brent catchment area, proved to be equally robust. Thus, it is possible that, although the proto Mole Wey river itself was completely replaced by the River Brent during the Anglian glaciation, and parts of those of its tributaries which came into contact with the ice front were diverted (as described below), other sections of today's network of Brent tributaries broadly reflect parts of the pre Anglian network of tributary streams which fed the proto Mole Wey. This could apply to, for example, the upper part of the Dollis Brook, the Folly Brook, the Silk Stream and the Wealdstone Brook. In the case of the uppermost section of the Dollis Brook, which runs broadly west east from Barnet Gate towards Barnet Playing Fields, it is possible that, immediately prior to the Anglian glaciation, that stream continued eastwards (where it now turns southwards, for reasons explained in the next section), at a today's altitude of about 90 metres, and joined a precursor of the Pymmes Brook in the vicinity of East Barnet. That precursor brook may then have flowed south eastwards to join the proto Mole Wey somewhere around New Southgate.

It has been known since the nineteenth century that an ice sheet once descended from the north of England as far as north London and left behind extensive spreads of till and other glacial deposits. This ice advance has since been identified as the Anglian glaciation. After reaching as far south as Ware, about 450,000 years ago, lobes of this ice sheet extended up two valleys, oriented south west to north east that of the proto Thames (which, by this time was flowing along the line of the Vale of St Albans, and where an ice lobe extended to Watford), and that of the proto Mole Wey (where the other lobe extended to Finchley). In the early twentieth century it was concluded that the Thames must have been diverted to its more southerly course of today by the ice advance up the Vale of St Albans to Watford. As noted above, the proto Mole Wey river was a tributary of the proto Thames. It flowed northwards from the Weald, then passed through what is today the Brent catchment area (but in the opposite direction to the flow of today's River Brent). As an ice sheet lobe advanced up the proto Thames valley towards Watford, the passage of the river was blocked, and its water backed up to form a lake in front of the advancing ice. The water in that lake eventually rose to relatively low points on the interfluve with the proto Mole Wey catchment area to the south east, where that water could overflow into that catchment area. Two such points were at Carpenders Park and Uxbridge. Water overflowed into the proto Mole Wey catchment in a considerable volume and with considerable force (to the extent that, in the case of the overflow at Uxbridge, the Thames in due course established a completely new course through that route). The overflow thus carved out much of the London Clay basin which today forms the north western section of the River Brent catchment area. In particular, it probably removed much of the Dollis Hill Gravel which must have been situated in this area prior to the Anglian glaciation. At the same time, a lake formed in front of the ice lobe which was moving south westwards up the proto Mole Wey valley towards Finchley, and which was blocking the flow of the proto Mole Wey river. This caused the lake in the proto Mole Wey valley to be drained, thus leaving the former islands in the lake as isolated hills in what is now the London Clay basin of the north western section of the River Brent catchment area.

As illustrated on a geological map of the area, it is striking that Dollis Brook, for the greater part of its length between Barnet Playing Fields and Henly's Corner, follows a north south line close to the western limit of glacial till left by the ice sheet lobe which extended to Finchley. Similarly, Mutton Brook follows an east west line which is close to the southern limit of glacial till left by the ice sheet lobe. This is because, as the ice sheet lobe in the valley of the proto Mole Wey river moved up that valley, it would have blocked streams flowing down towards that river from higher ground to the west and south. In particular, it would have forced the eastward flowing Dollis Brook to have turned to the south, alongside the western edge of the ice lobe (and likewise for Folly Brook). And it would have forced northward flowing drainage coming down from Highgate and Hampstead to have turned to the west, alongside the southern edge of the ice lobe (thus forming Mutton Brook). Fed by meltwater from the adjacent ice sheet, these streams would have cut down quickly along their new routes. And later, when the ice sheet retreated, a substantial thickness of till was left behind where the ice once sat. (For example, in the locality of the Finchley Gap, the ice left glacial deposits which today are up to 18 metres in thickness. The newly diverted Thames thus cut across the floor of the proto Mole Wey valley. And being a very powerful river, it would also have cut down below the level of that valley floor to some extent. Water from the Finchley pro glacial lake would thus have flowed down into the Thames and would have been carried away by it. As mentioned earlier, the lake would thus have dried up. A stream would then have cut back from the Thames, probably from around Hanger Lane. That stream probably cut back in a north easterly direction along the line of the former proto Mole Wey valley bottom (the near flat surface of which would by then have been covered by a certain amount of glaciofluvial material deposited by meltwater flowing from the front of the ice lobe). That stream, which would quickly have cut back to the ice front at Henly's Corner, would have been the incipient River Brent. Dollis Brook and Mutton Brook would have there flowed into this new stream. And the new stream would have been joined on its right bank by former tributaries of the proto Mole Wey river, notably the Wealdstone Brook and the Silk Stream. As the ice sheet melted, that incipient River Brent would have been heavily loaded with glaciofluvial material flowing from the melting ice, and from the till which the ice sheet was leaving behind. It appears that, at Hanger Lane, near its initial confluence with the Thames, the Brent was forced to deposit a large quantity of that material. In doing so it may also have been forced to move to its current course, slightly to the north, with its junction with the Thames thus moving to the west, in the vicinity of Greenford. Thus, by end of the Anglian stage, the current drainage network in the Brent catchment area had broadly been established. But the rivers and streams in the network at that time would then have been flowing at a higher level, relative to their altitudes today. On average, this could have been around 20 30 metres higher.

In the 400,000 years which followed the Anglian stage, rivers and streams incised themselves more deeply into the underlying strata. That erosion mostly took place in periods of "high discharge, under cold climatic conditions" when river flow was augmented and when vegetation was thin. In particular, the River Thames, which, in the vicinity of Hanger Lane was at a today's altitude of around 70 metres when it first established its diverted course, had probably cut down to about 60 metres by the end of the Anglian stage, and is now at an altitude of barely 10 metres at Kew. In thus cutting down by about 50 metres since the Anglian stage, the Thames would thus have lowered the base level of rivers and streams in the Brent catchment area, and they too have cut down to a notable degree in places, even though they obviously had much less erosive power than the much larger Thames. For example, the junction of Dollis Brook and Mutton Brook today is at an altitude of just under 50 metres. When the proto Mole Wey river was flowing through this locality prior to the Anglian glaciation, it was at an altitude of 68 metres. And Dollis Brook is relatively steep sided in certain sections for example, around Woodside Park, where the ground falls from over 90 metres altitude on the Finchley High Road to the brook at barely 60 metres, in a distance of only about one kilometre. A sizable section of that slope would have been the result of fluvial incision since the Anglian stage. During its post Anglian incision, the Thames in this area moved in a southward direction. As it did so, it laid down river terrace deposits (mostly sand and gravel) of decreasing age and altitude. The Thames Brent confluence also moved to the south, with the River Brent thus extending its course by over five kilometres, from Greenford to Hanwell, then to Brentford. As the Brent moved southwards, it cut down through the river terrace deposits which had been laid down by the Thames. During the post Anglian period, the River Brent itself left river terrace deposits in places. An older one is a Boyn Hill deposit just north of Brent Reservoir at an altitude of 60 metres. Younger ones include almost continual stretches of Taplow and Kempton Park deposits in the valley bottom and adjacent slopes downstream of Brent Reservoir. Thin strips of alluvium, immediately adjacent to the River Brent, Wealdstone Brook, Silk Stream and Dollis Brook, have been deposited in very recent geological times. They extend throughout almost the whole length of those watercourses. During the long, cold periods of the last 400,000 years, when there were an arctic climate and a lack of vegetation, "periglacial solifluction has been the most potent agent of erosion in the district when snow melted in the spring, debris of frost weathered material formed a slurry, which gradually flowed downhill". This process has caused a general lowering of the surface over much of the Brent catchment, particularly perhaps in the London Clay basin of the north western sector of the catchment, such as in the Kenton area. It has also probably accentuated the isolation of the isolated hills in that sector, and led to a diminution in their size. This is illustrated in both senses by the current aspect of Horsenden Hill, whose minuscule Dollis Hill Gravel cap is nearly three kilomètres distant from its nearest neighbour at Wembley (Linden Avenue). Wind erosion has also been a factor, especially, it seems, in fairly recent very cold periods (of the late Devensian). Wind blown deposits form part of the "brickearth" (or "Langley Silt") deposits which overlie parts of the Thames terrace deposits.

So extensive have the changes to this landscape been that what little evidence there is of man's presence before the ice came has inevitably shown signs of transportation here by water and reveals nothing specifically local. Likewise, later evidence of occupation, even since the arrival of the Romans, may lie next to the original banks of the Brent but have been buried under centuries of silt. The most prominent pre Roman settlement on the River Brent was apparently at Brentford. This Bronze Age site pre dates the Roman occupation of Britain, and thus predates the founding of London itself. Many pre Roman artifacts have been excavated in and around the area in Brentford known as 'Old England'. The quality and quantity of the artefacts suggests that Brentford was a meeting point for pre Roman tribes. One well known Iron Age piece from about 100 BC to AD 50 is the Brentford horncap a ceremonial chariot fitting that formed part of local antiquarian Thomas Layton's collection, now held by the Museum of London. Odd Roman artifacts have also been found by the River Brent in both Brentford and Hanwell, suggesting that a trading route may have used the river to trade with the early villages in Roman and post Roman times. However, can the river Brent be considered a border in the sense that the quality it possessed of dividing the land was notable enough to be given such a descriptive title? The Brent river valley in 705 would have looked very different to today. Before modern day dredging, the river was wider and shallower. Before the construction of its weirs, the Brent reservoir and Grand Union Canal (and its Paddington Branch, which takes much of the Brent's waters) the river would have flooded more frequently than it does today. The alluvial valley floor would therefore have been swamp. On Google Earth, the signs of many of the old drainage channels that turned the marsh into water meadow are still visible. Bordering these marshes would have been dense thickets of thorn and willow. A link can be made with the local area, the south west plains of Middlesex, forming the Anglo Saxon founded Hundreds of Elthorne [shelter tree, from Helethorne with the 'h' being lost to elision], and Spelthorne (perhaps speech/discourse tree). The earliest surviving reference to the then village of Hanwell is in 959, when it is recorded as Hanewelle in pledge, when Alfwyn (a Saxon) pawned his land for money to go on a pilgrimage. It was only a small hamlet on the river banks in the 10th century. Another conjecture is that one of the possible etymologies given for this ancient parish of Hanwell is 'Han' as Saxon for boundary stone and 'well' as Saxon for fresh water or spring. The Rectory Cottage to the parish church of St Mary has a large stone of about a ton in its garden. A large land owner and historian also put forward the observation that this appeared to line up with what he maintained as traces of the parish being divided up into the Roman centuria unit of land area, indicating that they used this stone as a datum. However, the position of the field boundaries and roads still wait to be statistically analysed to test this hypothesis. Nevertheless, a cursory inspection of old Ordnance Survey maps, blended with an appreciation of how hedges and boundary paths drift with time and use, strongly suggests that they approximated to dimensions of the quintarial limes of the Roman field system by a degree that far exceeds what would be expected by chance alone. Hanwell parish was very narrow in the east–west direction. The letter of 705 calling a meeting at Brentford to resolve a dispute between the East Saxons and the West Saxons; as early as this the Brent was recognised as a convenient halfway point or boundary. Other later historically important meetings are also recorded here. Going back a little further, etymological evidence of the West Saxons renaming settlements to the west including the Chilterns to the north west can be seen in their many place name endings such as field, ham, ton, and worth but at the Brent they almost stop — the course of the river presenting a boundary between lands named by the invading Saxons to the west and lands retaining the last vestiges of Romano British London which lasted until the end of the 5th century, having in many cases, older names. By the Middle Ages malaria had reached Britain: locally endemic in the south. The main instances were among shepherds (shearing marsh wool) and fishermen along the Thames as well as at Romney Marsh, following which the major lower Thames tributaries may have been seen for a time as unhealthy for settlement on their immediate banks; many adages of marsh and bog may date to this period. At places where river gravel beds formed a firm river bed fording was safe. Some such fording places were the Roman road crossing in Brentford itself, elevated to the status of a bridge in medieval times, in part funded by a small tax on Jews crossing the bridge, Green Lanes in Hanwell (a reminder that this was an old droving route, the word 'green' signifying that livestock could graze whilst on their last journey), and Hanwell Bridge on the Uxbridge Road. With only a few fordable places along the river's course, this presented an ideal natural defensive barrier. The original parish of Hanwell took in Boston Manor and Brentford, running three and a half miles north from the river's discharge but about one seventh the width. It separated the curacy of Norwood Green (west) and Ealing (specifically Gunnersbury manor) east. To the north it bordered Greenford and Perivale also using the river. Hanwell is only just over 914.40 m wide along the east–west line of the Uxbridge Road. The river's line, before the draining of the marshes, formed a natural boundary between the different pre and post Roman tribes of the south east of England. Certain accounts of the Romantic Period have speculation from its propensity to suggest regular links to druids, or of some other ancient religious deity, all which alluded more to fancy with which to delight the readers of the new vogue in travelogues, rather than the result of any serious study, the true history of the river Brent from these cannot be made out. This is also reflected in the coat of arms of the borough, showing a stylized river in the shield.

Brentford was a likely site of a battle recorded by Julius Cæsar between Julius Cæsar and local king, Cassivellaunus, in 54 BC. A letter from the Bishop of London in 705 suggesting a meeting at Breguntford, now Brentford, is the earliest record of this place and of the river. and runs through Temple Fortune to join the Brent at Riverside Drive in Hendon. Another, Clitterhouse Stream, rises at two locations on the western slopes of Hampstead Heath. One brook feeds the Leg of Mutton Pond on West Heath, and the lower duck pond of Golders Hill Park. On the bank of the stream by Leg of Mutton Pond lies the site of a Stone Age encampment, which was excavated by the Hendon and District Archaeological Society in the 1970s. Another brook feeds the upper duck pond in Golders Hill Park and then flows to merge with the other branch at the lower duck pond. From Golders Hill Park the stream flows underground approximately in parallel with Dunstan Road to Childs Hill Park. At Granville Road, at the south end of the park, a laundry industry once used the clean water of the stream as did a nursery industry, now all disappeared. From Granville Road the stream flows underground to emerge at Clitterhouse Playing Fields and joins the Brent at Brent Cross shopping centre. The River Brent flows alongside the A406 North Circular Road through Brent Park and then under the Northern line to Brent Cross and the Brent Reservoir, where it is joined by another tributary, the Silk Stream. There are several feeders to the Silk Stream including Burnt Oak Brook, Edgware Brook and Deans Brook.

From here, still closely following the North Circular Road, the river passes Stonebridge Park station, where it is joined by Wembley (Rowlands) Brook, which rises in Vale farm near Sudbury. The river continues under an aqueduct carrying the Paddington Arm of the Grand Union Canal. From Stonebridge Park the river turns westward, and flows under the A40 Western Avenue, past the Lilburne walk into Tokyngton Recreation Ground in Harlesden, and through the adjacent Brent River Park for three miles until it reaches Perivale. It then runs through Perivale Park past the local running track and under the railway bridge and into Stockdove Way crossing Argyle Road at the traffic lights into Perivale Lane, where it joins up with the foot/cyclepath at St Mary's the Virgin Perivale through to Pitshanger Park. It was dredged deeper in the 1960s and a control weir built, to reduce the risk of flooding, especially of Costons Lane, along which there is a flood protection wall. Previously, Ruislip Road East would also regularly become impassable. The river then swings south again at Greenford Bridge to Hanwell, a mile away across the fields. The river runs by the local cyclepath, along the northern pavement over Greenford Bridge and into Costons Lane before turning eastwards into Perivale Park. The river continues southeastward past St. Mary's Church. It flows under the Great Western Railway at the 900 foot long (270 m) Wharncliffe Viaduct, (100). It finally joins the tidal River Thames at Thames tidal locks 101 in Old Brentford, a mile upstream of Kew Bridge. The river intersects with the north to south Capital Ring, Section 8, which runs alongside it from Osterley Lock to Greenford.

Brentford Dock in west London was a major transshipment point between the Great Western Railway (GWR) and barges on the River Thames. The building of Brentford Dock was started in 1855 and it was formally opened in 1859. The dock yard was redeveloped in 1972 and is now Brentford Dock Marina and Brentford Dock Estate.

The Brent Reservoir (popularly called the Welsh Harp Reservoir) is a reservoir which straddles the boundary between the London boroughs of Brent and Barnet and is owned by British Waterways. The reservoir takes its informal name from a public house called The Welsh Harp, which stood nearby until the early 1970s. In a recent survey, a large number fish were captured in the reservoir and adjoining parts of the River Brent and Silk Stream, 95% of which were Roach. However, fishing is prohibited in the reservoir itself. The plans for the construction laid in 1803 were abandoned because of cost, but by 1820 there was not enough water to supply the Grand Union Canal and the Regent's Canal, so under an Act of Parliament in 1819, the Regent's Canal Company decided to dam the River Brent and create a reservoir in order to guarantee a sufficient water supply for their canals during drier weather, an accidental damming of the feeder streams and similar times of need. The reservoir was constructed by William Hoof between 1834 and 1835. The water flooded much of Cockman's Farm, to supply the Regent's Canal at Paddington. It was called "Kingsbury Reservoir" and its spread between Old Kingsbury Church and Edgware Road. Hoof, who was awarded the tender for the work (including the construction of a bridge) received the sum of £2,740 6s. In August 1835, a few months before completion, four brothers named Sidebottom drowned in an accident. The Welsh Harp Conservation Group (WHCG) managed in 1972 to fight off a local development plan. The WHCG organises management work, such as annual refurbishment of the tern rafts and works with Brent and Barnet councils on the site's management, including applying for National Lottery bids.

Brent River Park is one of London's larger urban green spaces. The natural landscape has recently been improved through the River Brent Project and further plans are proposed for future improvements. A new cycle path and wildlife conservation areas were opened in 2008. The whole of Brent River Park/ River Brent Park area is now designated as a nature conservation area and was so popular it received the Mayor of London's seal of approval by winning £400,000 for park projects and improvements in 2009, through the mayoral assembly's West London Priority Parks Award. The park is now full of flora and fauna, along with its adjacent meadows and colonies of bats.

The three meadows of Longfield/Perivale East Meadow and Pitshanger Riverside Meadows (part of Brent River Park) with natural riverbanks form part of the River Brent flood plain home to mallard ducks, moorhens, kingfishers and grey wagtails. It also passes through Perivale Park, which has had a few herons recently. The extensive flood prevention work undertaken during both the 1940s and 1970s, had led to this section of river in Tokyngton Park in Tokyngton, Brent, being straightened and enclosed in concrete. The river thus provided little or no recreational value to the local populace, whilst the quality of wildlife habitat was poor. During 1999, a local partnership was formed between the local authority, the Environment agency, local community groups and local firms, to implement improvements to the park for both people and wildlife.

Brent Lodge Park (or BLP) and Churchfields, which is located The Brent River Park, is a pocket of the countryside within the now urban environment of the London Borough of Ealing. the park is bordered by the River Brent on the west and south and has become one of the favourite places for locals to go for tranquillity and chilling out.

Ealing Hospital was re built near the banks of the River Brent in the 1970s, on the same site as St Bernard's Hospital, dating back to 1832 (as Hanwell Asylum). Within the bounds of the site of Brent Lodge Park and the Churchfields there is a grade 2 listed stable block (it contains an animal centre) which is the only remains of the old manor house, which sadly burned down in the 1930s. and the area in Brent is affected by diffuse urban pollution and drain misconnections as of 2010. The Silk Stream tributary was still the victim of at least one sewerage outflow pipe in 2010. Thames Water was called in 2010 to replace a collapsed sewer pipe in Queens Walk, Ealing but found that a stretch of town houses were in fact not properly connected to the sewerage system when they had been built in 2000; for 10 years their effluent had been carried into the River Brent. The Environment Agency's, environment management team leader, Sarah Mills, said: "Approximately eight to nine town houses have been found to be misconnected, which Thames Water have advised would have occurred when they were built around the year 2000." A later, but thankfully much smaller, sewerage leak occurred nearby on 3 April 2011.

Corseting or embanking (to form dry land embankments known in the US as levees) mostly took place in the 20th century, along most of the course. The banks' width could be reduced due to water retained by the Canal Feeder. The mid course of the river had been about 5 feet (2 m) deep, rising to about 14 feet (4 m) when it caused local flooding. Local flood alleviation work has mostly taken place from the 1940s to the 1970s, as Brent's Tokyngton Park. Brentford's section has been modified, cleansed and dredged several times since the late 19th century. The River Brent, proto Brent River Park and surrounding area almost became a section of the Greater London Council's flood prevention scheme plans for Ealing in the 1970s. The Brent flood prevention scheme was finally completed in the 1980s. School children from Alperton Community School were also involved in an Active Citizen Scheme along with the Environment Agency, to remind people not to pollute the Wealdstone Brook and River Brent through the abuse of the street surface water drains who conclude that littering, old plumbing and disposing of waste such as engine oil are destroying local fish spawning grounds.