Overlooking the Bachawy Valley - geograph

The Bachawy () (or Bach Howey on Early Ordnance Survey maps.) is a minor river in

Powys Powys ( , ) is a Principal areas of Wales, county and Preserved counties of Wales, preserved county in Wales. It borders Gwynedd, Denbighshire, and Wrexham County Borough, Wrexham to the north; the English Ceremonial counties of England, ceremo ...

Wales Wales ( ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by the Irish Sea to the north and west, England to the England–Wales border, east, the Bristol Channel to the south, and the Celtic ...

. It rises in the hills north of

Painscastle Painscastle () is a village and community in Powys (formerly Radnorshire), Wales which takes its name from the castle at its heart. It lies between Builth and Hay-on-Wye, approximately 3 miles from the Wales-England border today. The communi ...

, flowing initially to the southeast before turning to the southwest at Rhos-goch, assuming a more westerly direction at Painscastle then wrapping around the western end of

the Begwns The Begwns, or sometimes The Begwyns, form a small upland area in eastern Powys, Wales. They sit within the community (Wales), communities of Painscastle, Glasbury and Clyro, to the north of a great bend in the course of the River Wye, Wye val ...

as it drops into a wooded gorge to join the

River Wye The River Wye (; ) is the Longest rivers of the United Kingdom, fourth-longest river in the UK, stretching some from its source on Plynlimon in mid Wales to the Severn Estuary. The lower reaches of the river forms part of Wales-England bor ...

as a left-bank tributary near to

Erwood Erwood () is a village and community lying beside the River Wye, on the A470 road some 6 miles south-east of Builth Wells in Powys, Wales. The population of the community taken at the 2011 census was 429. It is in the historic county of Breck ...

. Rain falling on the southern slopes of Llanbedr Hill and the northern slopes of the Begwns makes its way into the Bachawy. Much of the Bachawy's valley is developed in

Silurian The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of t ...

age

mudstone Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds. Mudstone is distinguished from ''shale'' by its lack of fissility.Blatt, H., and R.J. Tracy, 1996, ''Petrology.'' New York, New York, ...

s and

siltstone Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt. It is a form of mudrock with a low clay mineral content, which can be distinguished from shale by its lack of fissility. Although its permeabil ...

s and parts are aligned with the Church Stretton Fault Zone. The lower gorge is cut in part through late Silurian age Raglan Mudstone Formation which forms the lowest part of the

Old Red Sandstone Old Red Sandstone, abbreviated ORS, is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great Britain, Ireland and Norway, and in the west along the eastern seaboard of North America. It ...

. At the eastern end of its

catchment A drainage basin is an area of land in which all flowing surface water converges to a single point, such as a river mouth, or flows into another body of water, such as a lake or ocean. A basin is separated from adjacent basins by a perimeter, th ...

is Rhos Goch Common National Nature Reserve. Another notable nature reserve within its catchment is Llan Bwch-llyn Lake, a stream draining which, enters the Bachawy as a right-bank tributary below Llanddewi. The lake is the largest natural water body in the old county of

Radnorshire Radnorshire () was Historic counties of Wales, one of the thirteen counties of Wales that existed from 1536 until their abolishment in 1974, later becoming a Districts of Wales, district of Powys from 1974 to 1996. It covered a sparsely populat ...

and is a

site of special scientific interest A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle ...

. It is managed on behalf of Dwr Cymru Welsh Water by the Radnorshire Wildlife Trust as a reserve both for its wetland plants and its birdlife. Some notable plants found here include

bogbean ''Menyanthes'' is a monotypic genus of flowering plants in the family Menyanthaceae containing the single species ''Menyanthes trifoliata''. The North American form is often referred to as ''M. trifoliata'' var. ''minor'' Michx. It is known ...

, lesser skullcap, devil's bit scabious and globe flower. There are

northern pike The northern pike (''Esox lucius'') is a species of carnivorous fish of the genus ''Esox'' (pikes). They are commonly found in brackish water, moderately salty and fresh waters of the Northern Hemisphere (''i.e.'' holarctic in distribution). T ...

European perch The European perch (''Perca fluviatilis''), also known as the common perch, redfin perch, big-scaled redfin, English perch, Euro perch, Eurasian perch, Eurasian river perch, Hatch, poor man's rockfish or in Anglophone parts of Europe, simply the ...

and

common rudd The common rudd (''Scardinius erythrophthalmus'') is a benthos, bentho-pelagic freshwater Actinopterygii, ray-finned fish belonging to the Family (biology), family Leuciscidae. This species is widely spread in Europe and central Asia, around the ...

in the lake and breeding birds include

sedge warbler The sedge warbler (''Acrocephalus schoenobaenus'') is an Old World warbler in the genus ''Acrocephalus (bird), Acrocephalus''. It is a medium-sized warbler with a brown, streaked back and wings and a distinct pale supercilium. Sedge warblers are ...

Eurasian reed warbler The common reed warbler (''Acrocephalus scirpaceus'') is an Old World warbler in the genus '' Acrocephalus''. It breeds across Europe into the temperate western Palaearctic where it is migratory, wintering in sub-Saharan Africa. It is also a re ...

and

common reed bunting The common reed bunting (''Emberiza schoeniclus'') is a passerine bird in the bunting family Emberizidae, a group now separated by most modern authors from the finches, Fringillidae. The genus name ''Emberiza'' is from Old German ''Embritz'', a ...

, as well as

coot Coots are medium-sized water birds that are members of the rail family, Rallidae. They constitute the genus ''Fulica'', the name being the Latin term for "coot". Coots have predominantly black plumage, and—unlike many rails—they are usual ...

moorhen Moorhens—sometimes called marsh hens—are medium-sized water birds that are members of the rail family (Rallidae). Most species are placed in the genus ''Gallinula'', Latin for "little hen." They are close relatives of coots. They are ...

and

water rail The water rail, western water rail or European water rail (''Rallus aquaticus'') is a bird of the rail family which breeds in well-vegetated wetlands across Europe, Asia and North Africa. Northern and eastern populations are migratory, but this ...

. Winter visitors include

teal alt=American teal duck (male), Green-winged teal (male) Teal is a greenish-blue color. Its name comes from that of a bird—the Eurasian teal (''Anas crecca'')—which presents a similarly colored stripe on its head. The word is often used ...

tufted duck The tufted duck (or tufted pochard) (''Aythya fuligula'') is a small diving duck with a population of nearly one million birds, found in northern Eurasia. They are partially migratory. The scientific name is derived from Ancient Greek , an unide ...

mallard The mallard () or wild duck (''Anas platyrhynchos'') is a dabbling duck that breeds throughout the temperate and subtropical Americas, Eurasia, and North Africa. It has been introduced to New Zealand, Australia, Peru, Brazil, Uruguay, Arge ...

pochard Pochard is a common name used for several species of diving ducks: *Four species in the genus ''Aythya'': ** Common pochard, ''Aythya ferina'' ** Baer's pochard, ''Aythya baeri'' ** Ferruginous pochard, ''Aythya nyroca'' ** Madagascar pochard, ' ...

and

goldeneye ''GoldenEye'' is a 1995 spy film, the seventeenth in the List of James Bond films, ''James Bond'' series produced by Eon Productions, and the first to star Pierce Brosnan as the fictional Secret Intelligence Service, MI6 agent James Bond (lit ...

. The lake is mentioned by the famed curate from

Clyro Clyro () is a village and community (Wales), community in Radnorshire, Powys, Wales, with 781 inhabitants as of the 2011 UK Census. The nearest town is Hay-on-Wye, some to the south-east. History The name of the village is thought to derive fro ...

, the Reverend

Francis Kilvert Robert Francis Kilvert (3 December 184023 September 1879), known as Francis or Frank, was an English clergyman whose diaries reflected rural life in the 1870s, and were published over fifty years after his death. Life Kilvert was born on 3 ...

in his diary.

References

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Bachawy The Bachawy () (or Bach Howey on Early Ordnance Survey maps.) is a minor river in Powys, Wales. It rises in the hills north of Painscastle, flowing initially to the southeast before turning to the southwest at Rhos-goch, assuming a more westerly ...

Sites of Special Scientific Interest in Powys