Arnon (Lake Neuchâtel)
| Arnon | ||
|
|
||
| Data | ||
| Water code | CH : 208 | |
| location | Canton of Vaud ; Switzerland | |
| River system | Rhine | |
| Drain over | Zihl Canal → Aare → Rhine → North Sea | |
| Headwaters | above Sainte-Croix between the Col des Etroits pass and the summit of the Cochet on the Chasseron Jura range 46 ° 50 ′ 13 ″ N , 6 ° 30 ′ 23 ″ E |
|
| Source height | approx. 1220 m above sea level M. | |
| muzzle | about 3 km northeast of Grandson in Lake Neuchâtel Coordinates: 46 ° 49 ′ 29 " N , 6 ° 40 ′ 59" E ; CH1903: 542 340 / 186 222 46 ° 49 '29 " N , 6 ° 40' 59" O |
|
| Mouth height | 429 m above sea level M. | |
| Height difference | approx. 791 m | |
| Bottom slope | approx. 40 ‰ | |
| length | approx. 20 km | |
The Arnon is an approximately 20 km long tributary of Lake Neuchâtel in the canton of Vaud in Switzerland . It drains a section of the northern Vaud Jura and belongs to the catchment area of the Rhine .
geography
The headwaters of the Arnon are located at around 1220 m above sea level. M. above Sainte-Croix between the Col des Etroits pass and the summit of the Cochet on the Chasseron Jura range . The stream initially flows south through Sainte-Croix, where it is largely overturned. Below the settlement area, it reaches the boggy lowland near La Sagne (1020 m above sea level).
The Arnon leaves this moorland to the east in a valley that sinks deeper and deeper into the limestone layers of the foremost Jura range, forming a characteristic gorge ( Gorges de Covatanne ). On this 3.5 km long route, the Arnon overcomes an altitude difference of almost 450 m. At Vuiteboeuf it reaches 580 m above sea level. M. the southern foot of the Jura , where the Baumine flows from the right , a mountain stream that rises south of the Aiguilles de Baulmes . Here the Arnon describes a right-angled curve and now flows first to the northeast, later again to the east, parallel to the foot of the Jura. The valley of the Arnon, which always has now a flat bottom of the valley of about 100 to 300 m in width is, the south by the ridge Miriau from the plane of the Swiss Midland separated.
Below Fiez , the valley widens more and more towards the basin of Lake Neuchâtel, and the northern flank of the valley is covered with vines . The Arnon flows into Lake Neuchâtel about 3 km northeast of Grandson .
history
The first written mention of the Arnon took place in 1177 under the name Ysernum . Later the names Lyserne , Sernon (1312), Lysernon (1336) and Lussernon (1364) appeared. From this the current name of the river developed over time. The original name goes back to the Gallic word isara (the impetuous, the quick).
The upper Arno valley with the Col des Etroits served as an important junction in the Jura as early as Roman times . The wild gorge of Covatanne had to be avoided. Since the Middle Ages , the pass path has been controlled by a castle owned by the Lords of Grandson at a narrow point above the gorge. The water power of the Arnon was used in various places for the operation of mills, sawmills and forges.