![river po river po](https://www.italyreview.com/uploads/2/6/3/6/26365745/river-po-italy-1_orig.jpg)
Thereafter, major dissection and downcutting occurred in the Lateglacial, confining the major rivers into large alluvial corridors, further shaped by lateral erosion during the Holocene. After the LGM the fan-head was dissected by trunk channels and, at the downslope fan limit, the southward flow shifted to a southeastern direction. BP, the area was fed by two outwash rivers, originated from the Adda and the Oglio piedmont glaciers, both characterised by a prevalent southward drainage, 160°-170° S in the LGM. A substantial reorganisation of the fluvial network occurred during the Last Glacial Maximum. During the Middle Würm, an alluvial fan of the Adda River oriented NWN-SSE occupied the area, feeding south and west the Romanengo hill. The obtained stratigraphic framework is presented by cross sections and by a geological map. Morphometric analysis and stratigraphic investigation were carried out, supported by palaeobotany, sand petrography and radiometric dating. The studied area is located between the Po River and the Alps north of the Adda/Serio river confluence, around the town of Crema. We focused on evidences of dissection and incision of former rivers into the large outwash fans originating from piedmont glaciers of the southern Alps in the Last Glacial Maximum.
RIVER PO SERIES
Now ERS-2 flies together with Envisat, ESA’s newest and most advanced environmental satellite.ĭuring twelve years of operation, data from the ERS series have served a variety of uses, from agricultural monitoring to climate change research to disaster relief.We reconstructed the geological evolution and the history of the fluvial network in the central part of the Po Plain in Lombardy, northern Italy, since the Middle Würm. Its instruments include an advanced Synthetic Aperture Radar (SAR) that can see through clouds and darkness.įor a while ERS-2 operated in tandem with its predecessor ERS-1, which was finally turned off in 1999. Where red is dominant denotes greater signal return for the June image, and in turn green for the July image.Ĭompleting an orbit of the Earth about once every 100 minutes from 800km up, ESA’s ERS-2 was launched back in 1995. Where the data input is similar for the two images a yellow-light green is produced. So the Po appears a clear black line in both these images, but its course has visibly thinned in the latter image.Ĭombining the data of the two images together to create what is called a multitemporal image highlights the changes. This means signal return is very low, represented in the image by dark pixels.
![river po river po](https://www.21grammy.com/wp-content/uploads/2014/11/plan-of-delta-of-po-river.jpg)
Recent storms and hail in the north gave farmers little relief, as the dry soil was unable to retain much water.ĮRS-2 Synthetic Aperture Radar (SAR) images show up water surfaces very well: water bodies such as rivers tend to be very flat so radar bounces off them rather than scatters. Irrigation-dependent corn, beet, fodder, soyabeans, rice and vegetable crops are all under threat. Multitemporal image of the Po River Valleyįarmers’ organisations in Piedmont, Lombardy, Emilia Romagna and Venice have called on the government to declare a state of emergency along the Po Valley.