Case Study: Using Soil Survey to Help Predict Sonoran Desert Tortoise Population Distribution and Densities

ABSTRACTThis paper proposes a methodology for quantifying the territorial impact on population distribution of the railway. The central hypothesis is that access to railway services provides the best-connected areas with a long-term comparative advantage over others that are less accessible. Carrying out a historical analysis and providing comparable data at the municipal level allows us to determine the extent to which the railway has fostered the concentration of population within its immediate surroundings. The case study presented here is that of Spain between 1900 and 2001, but the same methodology could equally be applied to any other country for which the required data are available. In this case, key data included a Geographic Information System with information about both the development of the railway network and census data relating to total population at the municipal level. The results obtained suggest the relevance of this methodology, which makes it possible to identify the periods and areas in which this influence was most significant.

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Transit networks, social contacts and open data meet public transportation plans for post-COVID-19: A Canadian case study

10.36227/techrxiv.14257976 ◽

2021 ◽

Author(s):

Oliver Benning ◽

Jonathan Calles ◽

Burak Kantarci ◽

Shahzad Khan

Keyword(s):

Public Transportation ◽

Population Distribution ◽

Open Data ◽

Practical Method ◽

Municipal Services ◽

Transit Network ◽

Research Findings ◽

Pandemic Response ◽

The Impact

This article presents a practical method for the assessment of the risk profiles of communities by tracking / acquiring, fusing and analyzing data from public transportation, district population distribution, passenger interactions and cross-locality travel data. The proposed framework fuses these data sources into a realistic simulation of a transit network for a given time span. By shedding credible insights into the impact of public transit on pandemic spread, the research findings will help to set the groundwork for tools that could provide pandemic response teams and municipalities with a robust framework for the evaluations of city districts most at risk, and how to adjust municipal services accordingly.

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Impact of consecutive extreme rainstorm events on particle transport: Case study in a Sonoran Desert range, western USA

Geomorphology ◽

10.1016/j.geomorph.2015.08.017 ◽

2015 ◽

Vol 250 ◽

pp. 53-62 ◽

Cited By ~ 6

Author(s):

Ronald I. Dorn

Keyword(s):

Particle Transport ◽

Sonoran Desert ◽

Western Usa

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Intrabasin Floral Differences in the Sonoran Desert; a case study from the Casa Grande Valley

10.7287/peerj.preprints.207v3 ◽

2014 ◽

Author(s):

Gabriela Garcia ◽

Sarah Gabriele ◽

Benjamin Cowgill ◽

Xavier Rodriguez ◽

Robert J Gay

Keyword(s):

Community Composition ◽

Soil Ph ◽

Sonoran Desert ◽

Mineral Content ◽

Controlling Factors ◽

Floral Variation ◽

Significant Difference ◽

Elevation Data ◽

Expected Values

Background: The purpose of this study was to determine what floral differences exist in North Mountain Park and Casa Grande Mountain Park which are both located on opposite sides of the Casa Grande Valley, Pinal County, Arizona and to attempt to explain any measured differences. Previous authors have proposed several explanations for floral variation within the Sonoran Desert including elevation, soil pH, and mineral content. This study explicitly tests several of these proposed mechanisms for determining community composition. Methods: The floral composition was measured in both North Mountain Park and Casa Grande Mountain Park through a series of transects which were sampled by multiple times in 2012 and 2013. Elevation data soil pH were also sampled. Results: The data recovered from North Mountain Park differed from the expected values in Casa Grande Mountain Park by 22%. This indicates a significant difference in the flora between these two localities that was not predicted by earlier studies. Elevation and soil pH differences between sampled localities were not significant. This suggests that mineral composition of the soil may play an important role within this basin in determining community composition. Discussion: Many factors that have been proposed in prior studies do not appear to play a significant role within the Casa Grande Valley in determining community composition. This indicates that the composition of a community is influenced by different factors in different locations within the Sonoran Desert. This makes determining overall controlling factors across an ecosystem difficult.

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Urban, industrial and technological risks. Synthesis of the elements of vulnerability of the city of Hassi-Messaoud

urbe Revista Brasileira de Gestão Urbana ◽

10.1590/2175-3369.012.e20190179 ◽

2020 ◽

Vol 12 ◽

Author(s):

Lahcene Bouzouaid ◽

Moussadek Benabbas

Keyword(s):

Urban Space ◽

Job Search ◽

Population Distribution ◽

Risk Assessments ◽

Demographic Development ◽

New Approach ◽

Different Types ◽

Specific Factors ◽

The City

Abstract Today, Algeria is one of the developing countries that are engaging seriously into a new approach consisting of all kinds of combined risk assessments for better prevention them. Note that, this is a fairly important parameter, that is, the safety of people and property. However, the magnitude of the risk, of whatever nature, affects a variety of diversified aspects (Human, economic, technical and environmental). This study presented a case study, which is sometimes paradoxical, seeing that it is the result of the combination of all risk factors and specific factors related to them connected to a fragile urban environment: Hassi-Messaoud. It is well known that Hassi-Messaoud is one of the most important city for Algeria's economy; in which the demographic development is mainly known by incessant flows of immigrants, motivated essentially by job search. This arbitrary of population distribution exposes this city to a certain danger; especially as Hassi-Messaoud is in a zone subject to a probable risk expressed here by being characteristic of an oil zone. Thus, this article aimed to provide elements of risk assessment related to oil activity. This approach could conclude that, through a schematic scale, the different types and levels of exposure and vulnerability could be identified, that is, characteristics of the urban space in question.

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