River Rhondda
Encyclopedia
River
A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Small rivers may also be called by several other names, including...
in the Rhondda
Rhondda
Rhondda , or the Rhondda Valley , is a former coal mining valley in Wales, formerly a local government district, consisting of 16 communities built around the River Rhondda. The valley is made up of two valleys, the larger Rhondda Fawr valley and the smaller Rhondda Fach valley...
Valley, South Wales
South Wales
South Wales is an area of Wales bordered by England and the Bristol Channel to the east and south, and Mid Wales and West Wales to the north and west. The most densely populated region in the south-west of the United Kingdom, it is home to around 2.1 million people and includes the capital city of...
which has two major tributaries; the Rhondda Fawr (Large Rhondda) and the Rhondda Fach (Little Rhondda).
Description
River Valley
River Valley is the name of an urban planning area within the Central Area, Singapore's central business district.The River Valley Planning Area is defined by the region bounded by Orchard Boulevard, Devonshire Road and Eber Road to the north, Oxley Rise and Mohamed Sultan Road to the east, Martin...
s are typically U-shaped glaciated valleys in carboniferous
Carboniferous
The Carboniferous is a geologic period and system that extends from the end of the Devonian Period, about 359.2 ± 2.5 Mya , to the beginning of the Permian Period, about 299.0 ± 0.8 Mya . The name is derived from the Latin word for coal, carbo. Carboniferous means "coal-bearing"...
sandstone
Sandstone
Sandstone is a sedimentary rock composed mainly of sand-sized minerals or rock grains.Most sandstone is composed of quartz and/or feldspar because these are the most common minerals in the Earth's crust. Like sand, sandstone may be any colour, but the most common colours are tan, brown, yellow,...
and coal
Coal
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure...
measures. The whole form of the river and its surrounding urbanisation has been dominated by coal mining
Coal mining
The goal of coal mining is to obtain coal from the ground. Coal is valued for its energy content, and since the 1880s has been widely used to generate electricity. Steel and cement industries use coal as a fuel for extraction of iron from iron ore and for cement production. In the United States,...
and the communities that grew up to exploit the rich coal
Coal
Coal is a combustible black or brownish-black sedimentary rock usually occurring in rock strata in layers or veins called coal beds or coal seams. The harder forms, such as anthracite coal, can be regarded as metamorphic rock because of later exposure to elevated temperature and pressure...
seams. Much of the valley has suffered severe subsidence
Subsidence
Subsidence is the motion of a surface as it shifts downward relative to a datum such as sea-level. The opposite of subsidence is uplift, which results in an increase in elevation...
because of the removal of coal from beneath the valley floor. The houses and streets have subsided with the result that river levels are, in parts , higher than the surrounding houses. In order to contain the river and prevent flooding, walls have been built, sometimes across the ends of streets - these are known as The Rhondda walls.
Course
The Rhondda Fawr has its source near Llyn FawrLlyn Fawr
Llyn Fawr is a lake in the Cynon Valley , South Wales, best known as the site of an important hoard of weapons and tools from the late Bronze Age and early Iron Age...
in a spring called Ffynnon y Gwalciau. The main head stream, Nant Carn Moesen, runs down a plateau slope for about two miles before descending sharply through a mountain gorge to the foot of Pen Pych. The river runs through Blaenrhondda
Blaenrhondda
Blaenrhondda is a village in the county borough of Rhondda Cynon Taf, Wales, lying at the head the Rhondda Fawr valley. Blaenrhondda is a very small village and is part of the community of Treherbert.-History:...
where it is joined by the Nant y Gwair via a classic example of a hanging valley, and runs down the Rhondda Valley, . The river then passes through a string of mining towns and villages including Treherbert
Treherbert
Treherbert is a village and community situated at the head of the Rhondda Fawr valley in the county borough of Rhondda Cynon Taf, Wales. Treherbert is a former industrial coal mining village which was at its economic peak between 1850 and 1920...
, Treorchy
Treorchy
Treorchy is a village, although it used to be and still has characteristics of a town, in the county borough of Rhondda Cynon Taf, Wales, lying in the Rhondda Fawr valley...
, Pentre
Pentre
Pentre is a village and community, near Treorchy in Rhondda valley, falling within the county borough of Rhondda Cynon Taf, Wales. The village's name is taken from the Welsh word Pentref, which translates as homestead, though Pentre is named after a large farm that dominated the area before the...
, Ton Pentre
Ton Pentre
Ton Pentre is a village in the Rhondda Valley in the county borough of Rhondda Cynon Taf, Wales. Ton Pentre, a former industrial coal mining village, is a district of the community of Pentre. The old district of Ystradyfodwg was named after the church at Ton Pentre...
, Ystrad Rhondda
Ystrad Rhondda
Ystrad is a community and village in the Rhondda Fawr valley, Rhondda Cynon Taf, Wales. As a community and ward Ystrad contains the neighbouring district of Gelli...
, Llwynypia
Llwynypia
Llwynypia , is a village in Rhondda Cynon Taf, Wales, near Tonypandy in the Rhondda Fawr Valley. Before 1850 a lightly populated rural farming area, Llwynypia experienced a population boom between 1860 and 1920 with the sinking of several coal mines after the discovery of large coal deposits...
, Tonypandy
Tonypandy
Tonypandy is a town in the county borough of Rhondda Cynon Taf, within the historic county boundaries of Glamorgan, Wales, lying in the Rhondda Fawr Valley. A former industrial coal mining town, today Tonypandy is best known as the site of the Tonypandy Riots....
, Dinas, Porth
Porth
Porth is a town and a community in the county borough of Rhondda Cynon Taf, within the historic county boundaries of Glamorgan, Wales, lying in the Rhondda Valley and is regarded as the gateway to the Rhondda Fawr and Rhondda Fach valleys because both valleys meet at Porth...
and Trehafod
Trehafod
Trehafod is a village in the Rhondda Valley between Porth and Pontypridd in the county borough of Rhondda Cynon Taf, Wales, although in administrative terms is split between the electoral division of Cymmer to the West and Rhondda to the East...
before finally reaching its confluence
Confluence
Confluence, in geography, describes the meeting of two or more bodies of water.Confluence may also refer to:* Confluence , a property of term rewriting systems...
with the River Taff
River Taff
The River Taff is a large river in Wales. It rises as two rivers in the Brecon Beacons — the Taf Fechan and the Taf Fawr — before joining to form the Taff north of Merthyr Tydfil...
at Pontypridd
Pontypridd
Pontypridd is both a community and a principal town of Rhondda Cynon Taf, Wales and is situated 12 miles/19 km north of the Welsh capital city of Cardiff...
.
The Rhondda Fach rises very close to the Rhondda Fawr on the hills above Blaenrhondda in a marshy area between Mynydd Beili Glas and Mynydd Bwllfa. The fledgling river is first contained in the Lluestwen reservoir
Reservoir
A reservoir , artificial lake or dam is used to store water.Reservoirs may be created in river valleys by the construction of a dam or may be built by excavation in the ground or by conventional construction techniques such as brickwork or cast concrete.The term reservoir may also be used to...
before flowing down into Maerdy
Maerdy
Maerdy is a village and community in the county borough of Rhondda Cynon Taf, and within the historic county boundaries of Glamorgan, Wales, lying at the head of the Rhondda Fach Valley.- History :...
and then on through Ferndale, Tylorstown
Tylorstown
Tylorstown is a village located in the Rhondda valley, in the county borough of Rhondda Cynon Taf, Wales. It was founded by Alfred Tylor who set up an early coal mining operation in the location in the mid-19th century....
, and Ynyshir
Ynyshir
Ynyshir , meaning "Long Island" in English, is a village and a community located in the Rhondda Valley, within Rhondda Cynon Taf, South Wales. The village takes its name from a farm in the area, falling within the historic parishes of Ystradyfodwg and Llanwynno . The community of Ynyshir also...
before joing its sister tributary at Porth.
Improving water quality
The mining industry had a catastrophic impact on the quality of the river with all the mine waters being pumped straight into the river with no treatment. For very long periods, probably more than a century, the river was continuously black with coal solids and little if anything could live in the river. This was compounded by the very basic sewageSewage
Sewage is water-carried waste, in solution or suspension, that is intended to be removed from a community. Also known as wastewater, it is more than 99% water and is characterized by volume or rate of flow, physical condition, chemical constituents and the bacteriological organisms that it contains...
disposal arrangements which saw all the sewage discharged into the same river. Not until the 1970s was there real investment made in improving the sewage treatment
Sewage treatment
Sewage treatment, or domestic wastewater treatment, is the process of removing contaminants from wastewater and household sewage, both runoff and domestic. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants...
arrangements.
Since the early 1970s the river has been steadily improving in quality largely due to the closure of all the coal mines and through the investment in sewerage and sewage treatment.