scholarly journals Modelling of Landslide Susceptibility Zonation Using Shannon’s Entropy Index and weight of evidence model (Case Study: Sarkhoon's Karoon)

2017 ◽  
Vol 21 (1) ◽  
pp. 51-68 ◽  
Author(s):  
kourosh shirani ◽  
Keyword(s):  
Landslide Susceptibility ◽  
Shannon’S Entropy ◽  
Weight Of Evidence ◽  
Model Case ◽  
Entropy Index ◽  
Shannon's Entropy ◽  
Landslide Susceptibility Zonation ◽  
Evidence Model

scholarly journals COMBINING FUZZY LOGIC AND INFORMATION THEORY FOR PRODUCING A LANDSLIDE SUSCEPTIBILITY MODEL

2017 ◽  
Vol 50 (3) ◽  
pp. 1737
Author(s):  
P. Tsangaratos ◽  
I. Ilia
Keyword(s):  
Information Theory ◽  
Fuzzy Logic ◽  
Landslide Susceptibility ◽  
Shannon’S Entropy ◽  
Slope Aspect ◽  
Susceptibility Map ◽  
Landslide Susceptibility Map ◽  
Entropy Index ◽  
Shannon's Entropy ◽  
Susceptibility Model

The main objective of the present study was to develop a landslide susceptibility model by combining Fuzzy logic and Information Theory in order to estimate the spatial probability of landslide manifestation, in the mountains of central Tzoumerka, Greece. Specifically, Fuzzy logic was enabled for weighting the landslide related variables based on expert knowledge and in respect to landslide susceptibility, while the Shannon’s entropy index, an index from Information Theory, was calculated to weight the significance of each landslide related variable based on the available data. The final landslide susceptibility map was produced by applying the weighted sum method. Engineering lithological units, slope angle, slope aspect, distance from tectonic features, distance from river network and distance from road network were among the six landslide related variables that were included in the landslide database used in the training phase. The landslide inventory map was constructed by interpreting aerial photographs, satellite images and field surveys and was separated into two datasets, one for training and one for validating the model. The outcomes of the validation process illustrated that the developed methodology efficiently provided the most susceptible areas and was in good agreement with the actual landslide locations. The area under the curve was estimated to be for the training and validating datasets 0.7575 and 0.7828 respectively. The produced landslide susceptibility map could be regarded from local and national authorities as a valuable mean to evaluate strategies or to prevent and mitigate the impact of landslides. Keywords: slope stability, fuzzy weighting, Shannon’s entropy index, Tzoumerka, Greece.

scholarly journals Assessment of urban growth using Shannon’s Entropy Index: A case study of Chennai, Detroit of India

2019 ◽  
Vol 11 (2) ◽  
pp. 281-284 ◽  
Author(s):  
Shenbagaraj N ◽  
Naresh Kumar M. ◽  
Leo Stalin J.
Keyword(s):  
Urban Sprawl ◽  
Urban Expansion ◽  
Vital Role ◽  
Shannon’S Entropy ◽  
Geographical Information ◽  
Entropy Index ◽  
Shannon's Entropy ◽  
Expansion Pattern ◽  
Chennai City

The Remote Sensing (R/ S) and Geographical Information System (GIS) play a vital role to evaluate and study the urban expansion pattern. In this study, the Chennai city was selected to perform the urban sprawl study. Five different periods of satellite imageries for the time elapsed between 1994 and 2016 were used. The main aim of this paper was to identify the urban sprawl of Chennai as a patterning process. The extended areas of urban in the period of 1994, 2001, 2006, 2011 and 2016 were extracted by the sub-pixel classification method from the satellite imageries. Furthermore, Shannon’s entropy index was used for assessing urban expansion. The findings of this study proved that Chennai city has sprawled by urban expansion during the period between 1994 and 2016. Likewise, the dispersion rate of urban sprawl for the periods of 1994, 2001, 2006, 2011 and 2016 were 0.671, 0.679, 0.688, 0.693 and 0.695 respectively. Consequently, this uncontrolled dispersed urban development had resulted in the study area losses their green space.

scholarly journals ASSESSMENT OF URBAN SPRAWL USING SHANNON’S ENTROPY AND FRACTAL ANALYSIS: A CASE STUDY OF ATAKUM, ILKADIM AND CANIK (SAMSUN, TURKEY)

2017 ◽  
Vol 25 (3) ◽  
pp. 264-276 ◽  
Author(s):  
Derya OZTURK
Keyword(s):  
Urban Sprawl ◽  
Fractal Analysis ◽  
Urban Form ◽  
Entropy Method ◽  
Shannon’S Entropy ◽  
Analysis Method ◽  
Maximum Likelihood Classification ◽  
Shannon's Entropy ◽  
Box Counting

Urban sprawl is one of the most important problems in urban development due to its negative environmental and societal impacts. Therefore, the spatial pattern of urban growth should be accurately analyzed and well understood for effective urban planning. This paper focuses on urban sprawl analysis in the Atakum, Ilkadim and Canik districts of Samsun, Turkey. In this study, urban sprawl was examined over a period of 24 years using Shannon's entropy and fractal analysis based on remote sensing and Geographic Information System (GIS). The built-up areas in 1989, 2000 and 2013 were extracted from Landsat TM/ETM+/OLI images using the maximum likelihood classification method, and urban form changes in the 1989–2013 period were investigated. The Shannon's entropy method was used to determine the degree of urban sprawl, and a fractal analysis method based on box counting was used to characterize the urban sprawl. The results show that Atakum, Ilkadim and Canik experienced important changes and have considerable sprawl and complex characteristics now. The study also revealed that there is no monotonic relationship between Shannon's entropy and fractal dimension.

Durational contrast in gemination and informativity

2018 ◽  
Vol 4 (s2) ◽  
Author(s):  
Shin-Ichiro Sano
Keyword(s):  
Shannon’S Entropy ◽  
Minimal Pair ◽  
Shannon's Entropy ◽  
Linguistic Behavior ◽  
Manner Of Articulation

AbstractRecent studies in Message Oriented Phonology (MOP) have provided increasing evidence that informativity plays a non-trivial role in linguistic behavior. This paper provides a case study of MOP focusing on the durational contrast of singleton and geminate consonants in spoken Japanese. In modern Japanese, short consonants (singletons) and long consonants (geminates) are lexically contrastive, and the durational properties of these consonants are affected by a variety of factors. This provides a useful test of the assumptions of MOP. Based on the assumption that the higher the informativity, the more robustly the contrast is phonetically implemented, this study examines the hypothesis that the durations of singletons and geminates increase or decrease according to the informativity of their durational contrast. The study confirms that (i) the distribution of singletons and geminates is affected by the manner of articulation and positional differences (morpheme-initial, medial, and final); (ii) the distributional differences follow from the informativity of contrasts as represented by Shannon’s entropy; and (iii) the durational contrast is enhanced by the presence or absence of a minimal pair.

An approach for GIS-based statistical landslide susceptibility zonation?with a case study in the Himalayas

Landslides ◽  
2005 ◽  
Vol 2 (1) ◽  
pp. 61-69 ◽  
Author(s):  
Ashis K. Saha ◽  
Ravi P. Gupta ◽  
Irene Sarkar ◽  
Manoj K. Arora ◽  
Elmar Csaplovics
Keyword(s):  
Landslide Susceptibility ◽  
Landslide Susceptibility Zonation
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