洞窟システム
Réseau de l'Ouysse (Cabouy – Pou Meyssen)
The first sump has low points of about 30 m on either side of Pou Meyssen. A 2017 composite plan of the whole network is linked from the FFS site but could not be read for this record.
The flooded underground course of the river Ouysse below the Causse de Gramat, entered at the Cabouy resurgence near Rocamadour and at the Pou Meyssen shaft 800 m upstream. Its first sump is about 2,400 m long.
The Ouysse flows largely underground beneath the Causse de Gramat and reappears at the Cabouy resurgence at the foot of Rocamadour, a few kilometres before it joins the Dordogne. Its size and flow made it one of the first objectives of French cave diving.
From the Cabouy pool divers descend quickly to a low point near 30 m, after which the floor rises gently over about 800 m to around 11 m depth, where the Pou Meyssen shaft provides a second way into the river. Beyond Pou Meyssen the passage dips again to about 30 m and then climbs over more than a kilometre to surface, roughly 1,950 m from Cabouy, in a lake about 400 m long; the second sump starts a few metres beyond it.
Between 2011 and 2014 two FFESSM divers, Franck Gentili and Renaud Cabanne, replaced the worn and broken guideline (the continuous line divers follow back to the exit) along the whole first sump, removed more than 3,000 m of old line, and marked the new line every 50 m with distances from Cabouy. Their account stresses that seasonal floods regularly break lines in this cave.
The traverse from Cabouy to Pou Meyssen was first made by Claude Touloumdjian, and a Franco-Swiss team passed the 1,200 m sump beyond in the early 1980s, according to the same account.
水、水流、洪水
The Ouysse is a major river of the northern Lot that runs under the Causse de Gramat and resurges at Cabouy. Violent seasonal floods are reported to tear out guidelines. At Pou Meyssen the water level varies with the seasons and the small pool silts up immediately when divers enter.
なぜ重要か
One of the historic objectives of French cave diving and a long, relatively shallow river cave regularly used by visiting cave divers; its first sump was fully re-lined by volunteer divers in 2011-2014.
コンディション
Typical values only. Floods are seasonal and violent; Divernet describes zero visibility through the silty approach at Cabouy, improving greatly inside the cave, and the Subaqua account says the Pou Meyssen pool clouds up as soon as divers enter.
公表資料からの一般的な範囲であり、現在のコンディションではありません。
測量と探査の歴史
| 1988 | An account of exploration from Pou Meyssen by Arnefaux is published on the FFS-hosted site. [3] |
| 2011-11-11 | Franck Gentili and Renaud Cabanne begin replacing the guideline in sump 1. [1] |
| 2014-11-26 | The last section of new line is laid, to the end of the lake before sump 2. [1] |
入口とダイブサイト
Two diveable entrances are documented: the Cabouy resurgence pool and the Pou Meyssen shaft about 800 m upstream (underground distance).
方向確認用であり、ナビゲーション用ではありません。白抜きのドットはおおよその位置を示しています。
このページのすべての情報とその出典 (11)
| 情報 | ステータス | 出典 |
|---|---|---|
| Sump 1 of the Ouysse network is 2,400 m long in total, with Cabouy as its main access point and Pou Meyssen about 800 m upstream. | 確認済み | [1] |
| About 1,950 m from Cabouy divers surface in a lake about 400 m long, beyond which sump 2 begins. | 確認済み | [1] |
| The first sump reaches low points of about 30 m near Cabouy and again beyond Pou Meyssen. | 確認済み | [1] |
| Re-lining dives ran from 11 November 2011 to 26 November 2014, laying nearly 2,400 m of new line and removing more than 3,000 m of old line. | 確認済み | [1] |
| Claude Touloumdjian made the 800 m traverse from Cabouy to Pou Meyssen, and a Franco-Swiss team passed the 1,200 m sump in the early 1980s.Historical summary given in the 2015 article without exact dates. | 報告済み | [1] |
| The Pou Meyssen fiche links to a Project Baseline project for the Ouysse network and integrates surveys proposed by Torsten Schnitter (update of 29 November 2014). | 確認済み | [3] |
| Violent seasonal floods break guidelines in the Ouysse. | 確認済み | [1] |
| Divernet gives about 14 °C as the average cave water temperature in the Lot.Regional average, not a measurement for this cave. | 報告済み | [4] |
| The FFS fiches and the Subaqua account do not state any permit or access rule for Cabouy or Pou Meyssen. | 報告済み | [1] [2] [3] |
| The Cabouy resurgence is published at N 44°47'26" E 1°35'03" (FFS) and N 44.790496 E 1.584059 (The Cave To Be). | 確認済み | [2] [5] |
| The Cabouy resurgence is published at N 44°47'26" E 1°35'03". | 確認済み | [2] [5] |
確認済み：直接開いた公式または一次情報源による記載。報告ベース：二次情報源のみによるもの。情報が競合：注釈に両方のバージョンを記載。最新情報でない可能性あり：確認できた最新の情報源が古い。
上記のソースをもとに、独自の言葉でまとめています。 修正を報告する