The River Arth is a small
river
A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of ...
that rises in the hills near
Bethania,
Ceredigion
Ceredigion (), historically Cardiganshire (, ), is a Principal areas of Wales, county in the West Wales, west of Wales. It borders Gwynedd across the River Dyfi, Dyfi estuary to the north, Powys to the east, Carmarthenshire and Pembrokeshire t ...
,
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 ...
, and runs west for and discharges into
Cardigan Bay
Cardigan Bay () is a large inlet of the Irish Sea, indenting the west coast of Wales between Bardsey Island, Gwynedd in the north, and Strumble Head, Pembrokeshire at its southern end. It is the largest bay in Wales.
Geography
Cardigan Bay ha ...
at
Aberarth.
Despite its small size it is one of the few rivers in Britain which has a
bore when the incoming tide cause a tidal wave to run upstream. The bore is only a few inches high and it runs only for a short distance upstream; beyond the road bridge in Aberarth the terrain rises steeply, preventing the bore propagating any further.
In the 1970s, the River Arth suffered severe intermittent
agricultural pollution
Agricultural pollution refers to biotic and abiotic byproducts of farming practices that result in contamination or degradation of the environment and surrounding ecosystems, and/or cause injury to humans and their economic interests. The po ...
from a dairy unit not far from the village but improved pollution control and a change of ownership of the farm rectified that position.
Arth
Arth is a village, a town, and a municipality in Schwyz District in the canton of Schwyz in Switzerland.
The municipality consists of the villages Arth, Oberarth, and Goldau. The four settlements Rigi Kulm, Rigi First, Rigi Klösterli, and ...
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