File:Skoteini-Argolidas+Katavothra Peloponnese Greece.jpg
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Ελληνικά: οροπέδιο “Σκοτεινή-Αλέα”, κοντά σε Σκοτεινή Αργολίδας, Πελοπόννησο, Ελλάδα. Μεγαλύτερα ρέματα ή ποτάμια δεν αναπτύχθηκαν ποτέ σε αυτήν την πεδιάδα. Όλα τα νερά βυθίζονται και διαπερνούν πορώδεις καρστικούς σχηματισμούς πετρωμάτων παρακάτω. Το έδαφος συχνά στεγνώνει πάρα πολύ ή πλημμυρίζει εποχιακά. English: Valley-like plain Skoteini-Alea, a 15 km long karst depression in 560 m (Argolis, Peloponnese). The plain has the character of a polje). The village Skoteini rests on a fertile slope (an alluvial fan) near by.
Larger streams or rivers never developed in this plain, as most waters seep through the soil and through karstic rock formations underneath. In geological ages subsurface waterways developed and formed two ponors on the plain’s surface. In Greece a ponor is called “katavothra”. In the Peloponnese most villages engaged in traditional small scale agriculture and struggled with conditions of the soil often dried out too much or seasonally flooded. To ensure faster and better drainage before the growing season starts, the “katavothras” are nowadays reinforced to prevent larger debris from clogging them. See also the photo, west valley end: Image:Katavothra Peloponnese.jpg.Deutsch: Talartige Hochebene Skoteini- Alea, Argolis, Peloponnes, ca. 15 km langes Karstbecken]] in 560 m. Das Karstbecken wurde in geologischen Zeiträumen mit fruchtbaren Sedimenten der Schutthänge der Bergketten beider Talseiten aufgeschüttet, auf deren nördlichen Hängen (Bergkette Oligyrtos) heute die Dörfer Skoteiní und Alea ruhen. Wasserreiche Bäche oder Flüsse konnten sich im Talboden aber nie entwickeln, denn das meiste Wasser versickerte, weil es in sich weitenden Klüften wasserlöslicher Karst-Gesteinsschichten unterirdisch abfließen konnte. An größeren unterirdischen Wasserwegen bildeten sich allmählich große Ponore, die man in Griechenland „Katavothren“ nennt. Ackerbau wurde hier immer schon durch zu schnell austrocknende Böden oder saisonale Überflutungen behindert. |
| Date | 25th April, 2007 |
| Source | Own work |
| Author | ulrichstill |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 13:33, 22 June 2022 | | 1,800 × 1,200 (2.14 MB) | Ulrichstill | Uploaded own work with UploadWizard |
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