A spatio-temporal cartography and landscape metrics of urbanization patterns in Algerian low-Sahara. The case of Ouargla City

Dechaicha, Assoule; Alkama, Dj.

doi:10.4314/jfas.v12i3.16

J. Fundam and Appl Sci.

2020

DOI: 10.4314/jfas.v12i3.16

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A spatio-temporal cartography and landscape metrics of urbanization patterns in Algerian low-Sahara. The case of Ouargla City

Assoule Dechaicha¹,

Dj. Alkama²

Abstract: Monitoring and assessment of spatial and landscape transformations generated by uncontrolled urbanization is currently a key step in any oasis sustainability project. Through a landscape-metrics based approach using a multi-time series of Landsat images (1985-2000-2015), we have tried to assess the spatial growth of Ouargla City (Algeria) over the last three decades, by highlighting its impact on the oasis ecosystem. The results of the spatio-temporal cartography have shown a significant spatial growth of buil… Show more

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Cited by 3 publications

References 13 publications

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Academics' mobility in the agglomeration of Constantine: A transports post-use evaluation

Meribai,

Lazri

2024

Glas Srp geogr drus

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The purpose of this study is to closely examine and analyze the increasing phenomenon of academics? urban mobility among students and teachers in the Constantine agglomeration through the examination of their movements. The employed methodology incorporates diverse qualitative research methods, such as covert participant observation, acquiring documentary and statistical data, establishing a research basis on the context, and post-use evaluation through an e-questionnaire survey. The analysis was conducted using tools such as GIS and SPSS. The evaluation utilized distinct criteria, such as origin-destination patterns, modal utilization, travel expenses, and frequency, travel timetables, commuting duration, and disparities between outbound and return journeys. The findings indicate that the commuting circuits of academics are mainly deployed in high-traffic circulation routes. The focus is on intermodality, which entails utilizing transportation modes other than personal vehicles and university buses, primarily due to the presence of a tramway line connecting the Constantine universities. The bus and taxi are frequently employed as the principal means along the tramway. The transport method, its cost, and the frequency of movement are significantly correlated. The travel schedules include peak periods in the morning and evening, and commute time is influenced by factors such as choice of transport mode, accessibility, and traffic congestion. The transport system in the Constantine agglomeration witnesses substantial usage during the academic period.

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Academics' mobility in the agglomeration of Constantine: A transports post-use evaluation

Meribai,

Lazri

2024

Glas Srp geogr drus

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Monitoring and Landscape Quantification of Uncontrolled Urbanisation in Oasis Regions: The Case of Adrar City in Algeria

Dechaicha

Daikh

Alkama

2021

JCUA

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Nowadays, uncontrolled urbanisation is one of the major problems facing Algerian oasis regions. The monitoring and evaluation of its landscape transformations remain a key step for any oasis sustainability project. This study highlights the evolution of spatial growth in the city of Adrar in southern Algeria during the period 1986-2016 by establishing a Spatio-temporal mapping and landscape quantification. The methodological approach is based on a multi-temporal analysis of Landsat satellite images for 1986, 1996, 2006 and 2016, and the application of landscape metrics. The results show two opposite spatial trends: significant growth of built-up areas against an excessive loss of palm groves. The landscape metrics allowed the identification of a progressive fragmentation process characterising the palm groves. Thus, the findings of this study show the utility of satellite imagery and landscape metrics approach for monitoring urbanisation patterns and assessing their impacts on oasis ecosystems.

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The Role and Impact of Vegetation on the Urban Fabric. Case of Guelma City

Teqwa Bechaa,

Krimo Dahmani,

Djamel Alkama

et al. 2024

IJITSS

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In cities, land use changes caused by various human activities can affect how natural ecosystems function. In this context, it is increasingly important for cities to consider the role of vegetation in preserving a sustainable environment. A diachronic analysis of landscape changes was applied to assess the presence and distribution of vegetation to determine whether it was evolving or regressing. This phenomenon was studied within the current administrative boundaries of the city of Guelma (Algeria). For this purpose, as an approach based on landscape metrics, several Landsat TM and ETM+ remote sensing satellite images were used throughout the period 1987-2019. A set of landscape indices, including NP, AREA_MN, LPI, PLAND, AI and LSI, were calculated to map land cover, the mechanism of land cover and vegetation change, and their impact on the urban ecosystem. The geo-statistical procedure was carried out using a geographic information system Qgis combined by statistical software using Fragstats to calculate various landscape metrics at class level for the analysis of fragmentation . The results of the landscape metric analysis show that the decrease in average area and the increase in the number of green patches are important indicators of land degradation, meaning that the mechanism of landscape degradation and transformation is progressive. This underlines the need to give particular attention to land use and land cover in the region to ensure the sustainable allocation of natural resources.

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A spatio-temporal cartography and landscape metrics of urbanization patterns in Algerian low-Sahara. The case of Ouargla City

Cited by 3 publications

References 13 publications

Academics' mobility in the agglomeration of Constantine: A transports post-use evaluation

Academics' mobility in the agglomeration of Constantine: A transports post-use evaluation

Monitoring and Landscape Quantification of Uncontrolled Urbanisation in Oasis Regions: The Case of Adrar City in Algeria

The Role and Impact of Vegetation on the Urban Fabric. Case of Guelma City

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