The morphology of Penios river
Penios river is river of Thessaly, which took its current form, afterwards the removal of the water of the formerly big Thessalian lake from a crack that was created in the valley of Tempi.
It has length almost 205 km and it is one of the biggest Greek rivers with total surface area 10.700 square kilometres. It is the third, in length, river of Greece, afterwards Aliakmonas and the Acheloos rivers, which springs from Greek territory.
It begins in the western sides of the southern Pindus mountains, in the boundaries of Prefectures of Ioannina and Trikala from the confluence of the streams Malakasiotiko, Mourgani. Then it enters in the basin of Thessaly, westwards of Kalambaka village, where it successively receives the waters of its tributaries Litheos, Pamisos and Enipeas.
Then Penios is going south-western and from the narrow pass Kalamaki, between the mountains Zarkos and Titaros, enters in the plain of Larissa. After Larissa as it goes to Lower Olympus it receives, in the narrow pass Rodia, the waters of its tributary Titarisios. It passes through the valley of Tembi, between Olympus and Ossa (Kissavos) mountains and after it receives the waters of the sources of Daphne and Aphrodite, it turns north-eastern and it flows into the Aegean Sea, creating a small delta, to the south of the cape of Platamonas and to the north of the village Stomio.
It flows, at its biggest part, via low flat extent with small speed of flow, which does not allow the corrosion and the deepening of its watercourse. On the contrary, its slow flow encourages the alluvium and thus during intense rainfalls are caused floods, often with disastrous results for the cultivations.