حفرة انهيارية
Boesmansgat
The single entrance to the Boesmansgat sinkhole on a private game farm in the Northern Cape: a narrow crack leading to a vast, very deep flooded chamber used for record-depth expeditions.
The dive entrance to Boesmansgat is a small crack, roughly 1.5 m by 3 m, at the bottom of a steep scramble on Mount Carmel game farm. Below it the flooded chamber widens rapidly into a very large void that continues to a silty floor at roughly 282-286 m.
Diving here is expedition work. A 2002 team needed about five hours just to move its equipment to the water's edge, and reported the nearest recompression chamber as about seven hours away. The documented dives are deep, long and supported by large teams, and the site is on private land with no public access procedure.
البيئة
Clear, still fresh water of about 19 C (1996 and 2002 reports) in a huge dark chamber; brown mud on the walls absorbs light, and the bottom is fine silt that clouds easily. At about 1,500 m altitude, decompression has to be adjusted for the lower air pressure.
الظروف
Temperature figures are from 1996 and 2002. The water level has changed over time.
نطاقات اعتيادية من مصادر منشورة، لا ظروف آنية.
المرافق
No dive facilities are documented; a 2002 team described a steep scramble to the water, a five-hour equipment carry and a recompression chamber about seven hours away.
للتوجه العام، لا للملاحة. النقاط المفرغة تحديد تقريبي.
كل حقيقة في هذه الصفحة مع مصدرها (8)
| حقيقة | الحالة | المصدر |
|---|---|---|
| Boesmansgat is on Mount Carmel, a game farm near the Kuruman-Danielskuil road, about a 30-minute drive from the farmhouse. | تم الإبلاغ | [1] [2] |
| Area-level coordinates only; the entrance is on private land.Rounded to 0.1 degree on purpose. | تم الإبلاغ | [3] [1] |
| The deepest point reached is 282.6 m (Gomes, 1996).283.3 m (Mail & Guardian 1996) and 286 m (GUE 2002) are also published. | المصادر متضاربة | [4] [5] |
| A 2002 GUE team worked at depths between 30 m and 90 m in the upper chamber. | قد تكون قديمة | [1] |
| About 19 C in 1996 and 2002. | قد تكون قديمة | [4] [1] |
| Divers drop through a crack about 1.5 m by 3 m; the chamber opens quickly below, with brown mud on the walls and silt on the floor. | تم الإبلاغ | [1] [5] |
| The sinkhole is on a private game farm; no public procedure, fee or opening hours were found. | تم الإبلاغ | [1] [2] |
| The descent to the water is a steep scramble and moving dive equipment to the water's edge took about five hours in 2002; the nearest recompression chamber was then about seven hours away. | قد تكون قديمة | [1] |
موثق: مُصرَّح به من مصدر رسمي أو أولي فتحناه. مُبلَّغ عنه: من مصدر ثانوي فقط. المصادر متضاربة: تتضمن الملاحظة النسختين. قد يكون قديماً: أحدث مصدر وجدناه قديم.
مكتوب بأسلوبنا الخاص من المصادر أعلاه. الإبلاغ عن تصحيح