Civic experiment · public data

Roads and landslide terrain.

Where Atri's roads cross terrain mapped as landslide-affected, and when rainfall approaches scientific thresholds.

This is not an official alertThis page is a civic, experimental processing of public data, for information and independent research. It is not an alert system and does not replace communications from Civil Protection and the Town. For alerts and what to do, only the official bulletin AllarMeteo Abruzzo applies. The author is not liable for improper use of this information.

2,255 haof land mapped as landslide-affected (25% of the Town)

49.0 kmof roads out of 400 cross mapped areas

111.9 kmwithin 50 metres of a mapped area

Recent rainfall

Calculating…

We compare the rain of the last hours (Open-Meteo model, at the "Atri, Calanchi" station point) with the scientific landslide-triggering curves for Abruzzo (Brunetti et al., 2010, 5% threshold: E = 5.94 · D^0.45, E in mm and D in hours). Exceeding it does not mean anything will slide: it means that, in the past, rainfall of this size has been associated with landslides in the region.

Map

Low exposuremediumhighArea mapped as landslide-affected

The colour of each 100-metre stretch shows how much the 50-metre strip around the road overlaps terrain already mapped as landslide-affected, steep or eroded. It does not indicate ongoing movement, nor that the road is unstable. Many mapped areas are old or dormant.

Roads with the most kilometres in mapped areas

Road	km in mapped areas
Borea San Domenico	2.31 / 3.28
SS553	1.68 / 2.0
Via San Massimiliano Kolbe	1.15 / 1.61
Strada delle Terme	1.12 / 4.23
Strada Provinciale 30	1.05 / 5.43
Via Fonte Canale	0.81 / 3.93
Strada Comunale Cagno	0.81 / 8.27
Strada Provinciale Fondo Valle Piomba	0.76 / 4.18
Via Monte Tabor	0.73 / 2.15
Autostrada Adriatica	0.53 / 7.03

How it is computed

Landslide areas: IFFI inventory (ISPRA) and the Abruzzo Region geomorphological map, "landslide movements" layer.
Slope: Copernicus GLO-30 terrain model (30 m). It underestimates scarps and roads on embankments.
Badlands and erosion: regional geomorphological map and modelled erosion (Abruzzo Region).
Roads: OpenStreetMap, excluding farm tracks.
Index: 0.30·slope + 0.35·landslide area + 0.15·badlands + 0.20·erosion, weights chosen by judgement and not calibrated on events. Low below 0.25; medium from 0.25; high from 0.5.

Limits

The maps are official but not updated in real time; the rain is from a model, not a rain gauge; the index is not calibrated and is not a probability. In past data, the two certain dates of heavy rain with road landslides (15 November 2017 and 1-3 April 2026) exceeded our thresholds: a good sign, but two cases prove nothing.

Seen a road collapse or landslide?

Report it with position and photo: it helps check whether the map matches reality. Go to Reports

Data: roads · mapped areas. Processed on 2026-09-19. In an emergency call 112.