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Marino, C. M.

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Produced by the NASA Center for Aerospace Information (CASI) 
https://ntrs.nasa.gov/search.jsp?R=19760019537 2020-03-22T14:04:09+00:00Z
UNIVERSITY►
 DEGLI STUDI DI MILANO
CATTEDRA DI F ISICA TERRESTRE	 ^
 11W
I	 VIA 0. 8. VIOTTI. 219 TEL. 206.907
20133 MILANO
—'Waft amble under NAM sponsorship
lu the interest Of early and wide d---s.
of Earth Resources Survey
inkmoon and without liability
un m6& thereof."
GEOMORPHIC AND LANDFORM SURVEY OF NORTHERN APPENNINI
(Inv. N. 28450)
i. 7.
	 1 0.3	 `..
P.I. Carla M. MARINO 
^-k-
Cattedra di Fisica Terrestre
UniversitA degii Studi di Milano
Quarterly Report N. 3
3 June I976
(876-10397) GECMORPHIC AND LASDFORM SURVEY
	 576-26625
OF NORTHERN IIPPRINI5I Quarterly Report
(Milan Univ.) 4 P HC $3.50	 CSCL 08E
Unclas
G3/43 00397
I
CATTSORA Of !I•ICA TRR1495TRIC
f I •	 UNIVKR$ITA Of MILANO
The scope of this report is to illustrate part of the methodology
utilized for the study, in general, of landslides and their
effect as shown by Landsat II images.
Our goal is the analysis of a test area included in the larger
"DISCO" test site.
For this study the images of June 14th and July 20th (2143-09275
abd 2179-09273) have been examined in the form of prints and slides
both in B & W and false colour composition form.
The scale of utilization was 1:250.000 but local enlargements
were done up to the scale 1:50.000.
Moreover video electronic analysis was employed in detailed analysis
of specific areas.
The territory object of our research is a large belt in Northern
Appennini range included in the italian official geological map
(Sheet N. 7I and 72).
Our starting point was the mapping of landslides and to relate these
phenomena to the geological units. These units were subdivided
basing on their permeability.
This process was accomplished in three operational stages:.
- Geological correlation of the outcropping formations considering
also vegetative cover
- Distinguishing these units by means of their geolithological
characteristics
- Classification of areas having permeability of different source,
confirmed by an"ad hoc" local survey.
Ground control was necessary for a correct definition of this last
goal.
In fact, in this area was noticeable the presence of formations
having several lithological types with frequent alternations
and flyschioid series.
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CATTZORA AI F#SIC^ T&ARLITRL
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UNIV6*5iTA QI MMAN4
For the above mentioned reasons surficial erosion is deeply
connected with the outcropping type.
A separate situation was considered for rockfalls in limestone
formations.
A thematic map was draft illustrating the different spectral
characteristics of soil with special reference to the vegeta-
tive cover.
In detail it was observed that the presence of humidity in the
saturated zone rear the surface or a water table at a small
depth is a source of a noticeable breakdown in the reflected
radiance in the near I.R. wavelenght (band 7).
In this way it was possible to map areas having a different
humidity content.
It is clear that, in this case, owing to the large extent of
the studied areas and to the ground resolution of the images the
goal has not been only the absolute precision in mapping the
phenomena but a better knowledge of their evolution on the
basis of the analysis of some parameters obtained by iterative
imaging.	 .
For this reason best results have been obtained using in analog
way the ratio between bands 5 and 7 (two passages) and their
electronic enhancement by derivative (normal and absolute)
method.
From a lithological point of view there are well differentiated
areas (Geological sheet N. 7I, formation of "Vallassa" sandstones);
the same happens from a morphological point of view (Geological
sheet N. 72) where are clearly identified the calarq ue structures
of "Lugagnano" clays and glacio-fluvial Riss and Wdrmer deposits.
A detailed ground survey is on work in order to clarify some
anomalies yet not well justified.
On the basis of the previous work our study places its focus on
CATTEORA Of FISICA TERRESTRE
. 3 .	 UNIVERSITA Of MILANO
the so called phenomenon indicators: in our opinion the main
factor is the humidity in not saturated portion of ground.
So a large contribution to our research will be given in final
report to the hydrological part of the study, especially in
the analysis of some kinds of landslides such as earth flows
and large rock falls.
From a statistical approach we will try to describe the dynamic
behaviour of these phenomena.
This will be done utilizing two or more elaborations showing
the spectral shift of the areas taking into account also some
flights over selected portion of the territory.
February and November imago will be also utilized for a more
correct comparison.
P.I. recognizes the valuable help of Dr. E. Zilioli, geologist,
in the analysis of Landsat 2 ir- ges and their utilization for
the goals of this study.
Dr. Carlo M. MARINO
V_


Geomorphic and landform survey of northern Appennini

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