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2023

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Articles 451 - 480 of 571

Full-Text Articles in Geography

Power And Politics: The Case Of Urbanization And River Channel Change, Peter Ashmore Jan 2023

Power And Politics: The Case Of Urbanization And River Channel Change, Peter Ashmore

Geography & Environment Presentations

Gradual urbanization of a watershed in Toronto, Canada, over 60+ years resulted in major channel changes. The temporal and spatial extent of channel widening are predictable from new analysis tracking changes in total stream power along the river system as urban land cover extended across the watershed, and also produced very high energy large flood events responsible for major channel change. The analysis is a geomorphically-satisfying, quasi-experimental test of theory of river channel change. But it misses important elements of the full trajectory of change that are not physically predictable. Treating urbanization as a neutral physical variable of changing watershed …


Evaluating River Morphology Change With A Geomorphic Form Variation Approach, Corey Dawson, Peter Ashmore, Robert Corry Jan 2023

Evaluating River Morphology Change With A Geomorphic Form Variation Approach, Corey Dawson, Peter Ashmore, Robert Corry

Geography & Environment Publications

Geomorphic river design strives for natural resilience by encouraging geomorphic form complexity and morphological processes linked to greater habitat diversity. Increasing availability of high-resolution topographic data and spatial feature mapping methods provide advantages for morphological analysis and river restoration planning. We propose and evaluate an approach to quantifying topographic variability of geomorphic form and pixel-level surface roughness resulting from channel planform geometry differences using spatially continuous variety computation applied to component metrics including flow direction, aspect and planform curvature. We define this as the geomorphic form variation (GFV) approach and found it scalable, repeatable and a multi-stage analytical metric for …


No. 60: Opening Access To Urban Food Security Data In Africa From The Hungry Cities Partnership, Gareth Haysom, Bruce Mcdougall, Samuel Owuor, Ndeyapo Nickanor, Ines Raimundo, Lawrence Kazembe, Lynn Woolfrey, Jonathan Crush Jan 2023

No. 60: Opening Access To Urban Food Security Data In Africa From The Hungry Cities Partnership, Gareth Haysom, Bruce Mcdougall, Samuel Owuor, Ndeyapo Nickanor, Ines Raimundo, Lawrence Kazembe, Lynn Woolfrey, Jonathan Crush

Hungry Cities Partnership

The Hungry Cities Partnership (HCP) initiated a 7-year programme of food system research in eight cities of the Global South in January 2015: Mexico City, Mexico; Kingston, Jamaica; Windhoek, Namibia; Cape Town, South Africa; Maputo, Mozambique; Nairobi, Kenya; Bangalore, India; and Nanjing, China. This paper describes the research process in the four African cities of Cape Town, Maputo, Nairobi, and Windhoek. The HCP data provide rich and context-specific information useful in avoiding generalizations in theory and inserting a Southern and African perspective into wider food studies and global policy debates. The paper describes and compares the survey methodology in the …


No. 59: Increasing The Use Of Spatial Data In Urban Household-Level Food Security Measurement, Jordan Blekking, Kurt Waldman Jan 2023

No. 59: Increasing The Use Of Spatial Data In Urban Household-Level Food Security Measurement, Jordan Blekking, Kurt Waldman

Hungry Cities Partnership

Measuring urban food security in Africa is challenging because the current food security metrics were designed for rural contexts, and often feature a bias toward food availability, yet limited urban food production means urban food security measurement requires a multi-dimensional evaluation that also takes stock of the spatial and behavioural dimensions of food security. Current metrics are poorly suited to evaluate urban food security because they do not incorporate the spatial and behavioural dimensions of urban livelihoods, which relate to the variability of entitlements across space and how urban infrastructure accessibility enhances or constrains the choices available for a household …


No. 56: Towards A New Food Security Index For Urban Household Food Security, Cameron Mccordic, Bruce Frayne, Naomi Sunu, Clare Williamson Jan 2023

No. 56: Towards A New Food Security Index For Urban Household Food Security, Cameron Mccordic, Bruce Frayne, Naomi Sunu, Clare Williamson

Hungry Cities Partnership

The multidimensionality of food security can confound both statistical modelling and clear policy narratives. That complexity can become amplified in urban areas where food security is often a function of both local and global factors. Rather than focusing on one dimension of food security metrics, this investigation proposes a method for building an index of urban household food access, utilization and stability. The performance of this index is compared across three aggregation methods using household surveys collected from five cities around the world. The findings indicate that each aggregation method was internally consistent, although one of the aggregation methods, relying …


Ground Penetrating Radar Survey At Flat Iron Lake, Melinda C. Higley, Zachary Macmillan, Josiah Eising, Chafer Jolman Jan 2023

Ground Penetrating Radar Survey At Flat Iron Lake, Melinda C. Higley, Zachary Macmillan, Josiah Eising, Chafer Jolman

Summer Research

Ground Penetrating Radar (GPR) is a shallow surface geophysical method for characterizing the subsurface and locating underground utilities and point objects. It works in freshwater environments, making it a useful tool for imaging lake bottom bathymetry and stratigraphy. Our study site is a deep and organic kettle lake called Flat Iron Lake (Figure. 7; 43°07'23.8"N 85°23'05.8"W). The water level at the time of collection was higher than normal due to heavy storms in the preceding weeks; as such the current depths are likely slightly shallower than what is presented.


El Refugio De La Imagen Chamánica En El Mundo Malagana, Sonia Blanco, Catalina Simmonds Caldas Jan 2023

El Refugio De La Imagen Chamánica En El Mundo Malagana, Sonia Blanco, Catalina Simmonds Caldas

Segundo congreso internacional de iconografía precolombina. Barcelona, 2023. Actas.

La voluntad de elaborar una pieza antropomorfa, es incidir sobre el objeto, haciéndolo actuante. Tratándose del mundo Malagana – sociedad prehispánica colombiana –, que consideró el papel primordial de la mujer, esta imagen femenina y robusta, en cerámica, de pie, portadora de una máscara, como pieza – soporte simbólica contendría en su epidermis y gesto, una narrativa ritual. Desarrollada en un espacio funerario, como ajuar, personificaría los atributos del mono aullador y convocante de los “espíritus (auxiliares) alter-ego”, de los monos ardilla, intervendría de forma ritualista sobre los humedales del pueblo Malagana, aportándoles el equilibrio para la inflorescencia de la …


Mapping For Accountability: Decolonizing Land Acknowledgment Initiatives, Salma Monani, Sarah E. Gilsoul Jan 2023

Mapping For Accountability: Decolonizing Land Acknowledgment Initiatives, Salma Monani, Sarah E. Gilsoul

Environmental Studies Faculty Publications

What does it mean to map Indigenous presence onto lands that have been appropriated by settler colonial nation states? This chapter examines the challenges and potentials of re-inscribing Indigenous land relations through a digital mapping project, Indigenous Pennsylvania: Past, Present and Future. Situating itself within the growing scholarship of Indigenous cartographies, the chapter presents Indigenous Pennsylvania as an example of d-ecomedia, a shorthand we offer for ecomedia projects that foreground decolonial methodologies. Such methodologies prompt us to attend to a storied sense of Indigenous place-based relations through attention to Indigenous spatial and temporal modes of mediation.


The Primacy Of Openness In Ecological Complexity Theory, Colby Clark Jan 2023

The Primacy Of Openness In Ecological Complexity Theory, Colby Clark

Theses and Dissertations--Philosophy

Five principles are at the foundation of complex systems theory: emergence, openness, contingency, historicity, and indeterminacy. Of those five, the principle of emergence is easily the most prevalent. Simply put, emergence refers to the idea that some wholes cannot be properly accounted for by appealing to individual explanations of the parts that compose it. In ecological complexity theory, the principle of emergence is strongly associated with the self-organizing feedbacks that often identify the structural framework of ecosystems.

Within the last half century, the intense focus on the principle of emergence has engendered the development of many conceptual distinctions that have …


From The Poor People’S Campaign To The Poor People’S Campaign: Fifty Years Of Protest In The United States, Mike Kohout Jan 2023

From The Poor People’S Campaign To The Poor People’S Campaign: Fifty Years Of Protest In The United States, Mike Kohout

Geography and Environmental Studies Faculty Publications

No abstract provided.


Developing A Standardized Gis Model Capable Of Identifying Areas To Implement Wind Power Generation Infrastructure, Namidu Vishwanath De Silva Jan 2023

Developing A Standardized Gis Model Capable Of Identifying Areas To Implement Wind Power Generation Infrastructure, Namidu Vishwanath De Silva

All Graduate Theses, Dissertations, and Other Capstone Projects

This project involves the use of multi-source GIS data, suitability analysis, and spatial modeling techniques to identify the most suitable areas for improving renewable energy infrastructures, primarily focusing on wind energy, within a given region. Previous literature conducted on the subject matter shows research being done in isolated areas or states. The primary objective of this project is to develop a GIS model and scripting tool that has the capability to test any input region to find the most suitable area within the given region that would be ideal for implementing new wind power infrastructure. The success rate of the …


Embodying Arts Festivals As Infrastructural Transformation Of Places, Bernadette Quinn Jan 2023

Embodying Arts Festivals As Infrastructural Transformation Of Places, Bernadette Quinn

Books/Book chapters

Arts festivals are important forms of cultural production and consumption (Négrier 2015). Irrespective of genre (e.g., visual arts, music or film) and whether single or multidisciplinary, their primary endeavour is to engage people in the making, showcasing and performance of art. Yet arts festivals do not necessarily receive recognition or attention based on their cultural attributes alone. Festivals and events have become “central to entrepreneurial cities’ efforts to generate commerce, regenerate place and stand out on the highly competitive global stage” (Quinn et al. 2020, 1875). Along with arts and cultural activities more generally, recent decades have seen cities use …


Fostering Socio-Ecological Resilience To Wildfire By Interconnecting Knowledge Systems At Cal Poly Humboldt, Jeffrey M. Kane, Erin Kelly, Benjamin Graham, David Greene Jan 2023

Fostering Socio-Ecological Resilience To Wildfire By Interconnecting Knowledge Systems At Cal Poly Humboldt, Jeffrey M. Kane, Erin Kelly, Benjamin Graham, David Greene

Humboldt Journal of Social Relations

The wildfire-related challenges of Northern California and many other regions in the western United States are daunting in scope and magnitude. Ecologically and culturally salient solutions that limit the negative impacts of wildfire and promote resilience of human and ecological systems will require newer approaches. Through Cal Poly Humboldt and the Fire Resilience Institute, there is greater emphasis on the interconnection of knowledge systems across education, training, research, and management. Here we highlight several on-going efforts that seek to enhance the fire resilience workforce, promote socio-ecological resilience through interdisciplinary projects, and inform management through monitoring and research projects that intentionally …


Cannabis, Communities, And Place: (Re)Constructing Humboldt’S Post-Prohibition Present, Josh Meisel, Dominic Corva, Ara Pachmayer Jan 2023

Cannabis, Communities, And Place: (Re)Constructing Humboldt’S Post-Prohibition Present, Josh Meisel, Dominic Corva, Ara Pachmayer

Humboldt Journal of Social Relations

Since 1990, many Cal Poly Humboldt faculty and students have made cannabis the focus of scholarship and learning. This work has been shaped by the political, economic, and cultural legacies of cannabis in Humboldt County. Scholarly interest spans multiple dimensions of cannabis cultivation, commerce, consumption, and related social issues. As a multidisciplinary team of scholars, Cal Poly Humboldt faculty affiliated with the Humboldt Institute for Interdisciplinary Marijuana Research (HIIMR) have also shaped the Bachelor of Arts in Cannabis Studies that will launch in Fall 2023. This is the first social science degree program in the United States with this orientation. …


“Why You Always So Political?”: A Counterstory About Educational-Environmental Racism At A Predominantly White University, Martín Alberto Gonzalez Jan 2023

“Why You Always So Political?”: A Counterstory About Educational-Environmental Racism At A Predominantly White University, Martín Alberto Gonzalez

Chicano/Latino Studies Faculty Publications and Presentations

Using critical race counterstorytelling, I tell a story about the experiences of Mexican/Mexican American/Xicanx (MMAX) undergraduate students at private, historically and predominantly white university in the Northeast. Drawing on in-depth interviews, participant observations, pláticas, document analyses, and literature on race and space and racism in higher education, I argue that the racially hostile campus environment experienced by MMAX students at their respective university manifests itself as a form of educational-environmental racism. Through narrated dialogue, Aurora (a composite character) and I delve into a critical conversation about how educational-environmental racism is experienced by MMAX students through a racialized landscape in the …


Bibliography, Anthony Harkins Jan 2023

Bibliography, Anthony Harkins

Faculty/Staff Personal Papers

Bibliography of publications by Anthony Harkins.


Multisensory Experiences In Archaeological Landscapes—Sound, Vision, And Movement In Gis And Virtual Reality, Heather Richards-Rissetto, Kristy Primeau, David E. Witt, Graham Goodwin Jan 2023

Multisensory Experiences In Archaeological Landscapes—Sound, Vision, And Movement In Gis And Virtual Reality, Heather Richards-Rissetto, Kristy Primeau, David E. Witt, Graham Goodwin

Department of Anthropology: Faculty Publications

Archaeologists are employing a variety of digital tools to develop new methodological frameworks that combine computational and experiential approaches which is leading to new multisensory research. In this article, we explore vision, sound, and movement at the ancient Maya city of Copan from a multisensory and multiscalar perspective bridging concepts and approaches from different archaeological paradigms. Our methods and interpretations employ theory-inspired variables from proxemics and semiotics to develop a methodological framework that combines computation with sensory perception. Using GIS, 3D, and acoustic tools we create multisensory experiences in VR with spatial sound using an immersive headset (Oculus Rift) and …


Exploring Inequality At Copan, Honduras: A 2d And 3d Geospatial Comparison Of Household Wealth, Heather Richards-Rissetto Jan 2023

Exploring Inequality At Copan, Honduras: A 2d And 3d Geospatial Comparison Of Household Wealth, Heather Richards-Rissetto

Department of Anthropology: Faculty Publications

The archaeological site of Copan was a cultural and commercial crossroads at the southeastern Maya frontier. Research indicates that the demographics and sociopolitical circumstances of the city of Copan and its location within a circumscribed pocket (24 km2) of the larger Copan Valley varied through time. These circumstances not only influenced its social, political, and economic interactions, but likely the size, construction, and organization of households, specifically plazuelas. Copan’s plazuelas differ from those located in other Maya regions because they often have smaller house platforms, comprise more than a single patio, and exhibit a larger than normal …


El Sobredimensionamiento Y Otros Recursos Plásticos Como Representación De La Capacidad Extática–Visionaria En El Arte Chamánico Americano, Ana María Llamazares Jan 2023

El Sobredimensionamiento Y Otros Recursos Plásticos Como Representación De La Capacidad Extática–Visionaria En El Arte Chamánico Americano, Ana María Llamazares

Segundo congreso internacional de iconografía precolombina. Barcelona, 2023. Actas.

Este artículo explora uno de los principales rasgos del arte chamánico visionario: el sobredimensionamiento de las figuras o de algunas de sus partes significativas. A través de diversos registros arqueológicos y contemporáneos, se brindan elementos valiosos para interpretar como representaciones explícitas de la capacidad extática o visionaria, ciertas imágenes de arte prehispánico o etnográfico ligadas a tradiciones de prácticas chamánicas americanas, en las que se ha expresado la percepción de la magnificación energética a través de rayos, aureolas o apéndices diversos que expanden el tamaño de las cabezas, manos, pies u otras partes del cuerpo en forma desproporcionada respecto del …


Epigenetics And Social Inequalities In Asthma And Allergy, Elizabeth S. Clausing, Cassidy J. Tomlinson, Amy L. Non Jan 2023

Epigenetics And Social Inequalities In Asthma And Allergy, Elizabeth S. Clausing, Cassidy J. Tomlinson, Amy L. Non

School of Global Integrative Studies: Faculty Publications

Respiratory illnesses, such as asthma and allergy disorders, are disproportionately more common among minority racial/ethnic groups and those of low socioeconomic status. In the United States, asthma prevalence and severity are highest among Puerto Ricans (19.2%), American Indians/Alaska Natives (13%), and Black Americans (12.7%) and higher in families living below the poverty threshold than among those living above it (11% vs 8%–9%).1 Many studies of asthma/allergy inequalities assume that genetic differences underlie racial/ethnic differences in these disorders, pointing to genetic ancestry differences between races, but most genetic variants fail to explain racial/ethnic differences and are usually studied only in …


A Network Perspective On Multi-Scale Water Governance In The Lake Champlain Basin, Vermont, Patrick Bitterman, Christopher Koliba, Anna Singer Jan 2023

A Network Perspective On Multi-Scale Water Governance In The Lake Champlain Basin, Vermont, Patrick Bitterman, Christopher Koliba, Anna Singer

School of Global Integrative Studies: Faculty Publications

The prevalence and persistence of harmful cyanobacterial blooms demonstrate the importance of governance systems that effectively engage with many actors to address nonpoint pollution from a variety of sources across multiple spatial domains. Although the importance of social-ecological alignment on effective governance is increasingly clear, governance systems often evolve incrementally and in a manner that fails to adequately align resources and governance networks with biophysical structures, processes, and legacies. Through a survey of water governance actors in the Lake Champlain Basin, we map the structure of the water governance network and identify the key information brokers, flows of resources, and …


The Rhino Horn Trade And Radical Inequality As Environmental Conflict, Elizabeth Lunstrum, Nícia Givá, Francis Massé, Filipe Mate, Paulo Lopes Jose Jan 2023

The Rhino Horn Trade And Radical Inequality As Environmental Conflict, Elizabeth Lunstrum, Nícia Givá, Francis Massé, Filipe Mate, Paulo Lopes Jose

Global Studies Faculty Publications and Presentations

The illegal wildlife trade (IWT) is one of the most acute global conservation challenges. This paper examines what is driving young men to enter the rhino horn trade while advancing theory on environmental conflict. We show how the illicit rhino horn economy is a telling instance of environmental conflict—largely between ground-level hunters and increasingly militarized state conservation forces—that emerges from a context of radical inequality. We examine how practices ranging from labor migration and sidelining rural development to biodiversity conservation itself have profoundly transformed the Mozambican-South African borderlands from which many hunters originate, in turn generating poverty, exclusion, and vulnerability …


Ethnic Difference At The Center Of Land Struggles In The Americas: A Complex History Of Marginalization And Multidimensional Challenges Among The Garifuna In The Northern Honduras, Kaitlyn Bellamy, Victoria Garcia, Saleh Ahmed, Adriana Archila Jan 2023

Ethnic Difference At The Center Of Land Struggles In The Americas: A Complex History Of Marginalization And Multidimensional Challenges Among The Garifuna In The Northern Honduras, Kaitlyn Bellamy, Victoria Garcia, Saleh Ahmed, Adriana Archila

Global Studies Faculty Publications and Presentations

Across the world, natural resources play a critical role in shaping livelihoods among the ethnic and indigenous communities. This article highlights the struggles Garifuna in northern Honduras face regarding land ownership, despite being constitutionally recognized yet ignored by the government. For them, land struggles are also their racial struggles. Contested land ownerships are the outcomes of historical discriminations, leaving Garifuna vulnerable to violence. This article addresses the multidimensional aspects of land-based struggles that have resulted in social, cultural, and environmental damage, creating insurmountable pressures on local Garifuna livelihoods.


Adaptation Outcomes In Climate-Vulnerable Locations: Understanding How Short-Term Climate Actions Exacerbated Existing Gender Inequities In Coastal Bangladesh, Saleh Ahmed, Elizabeth Eklund, Elizabeth Kiester Jan 2023

Adaptation Outcomes In Climate-Vulnerable Locations: Understanding How Short-Term Climate Actions Exacerbated Existing Gender Inequities In Coastal Bangladesh, Saleh Ahmed, Elizabeth Eklund, Elizabeth Kiester

Global Studies Faculty Publications and Presentations

Adverse climate impacts present a significant challenge for the majority of the world’s population. It is especially true for smallholder farmers in coastal Bangladesh, where some adaptation initiatives appeared to be short-sighted and reproduced further inequity, poverty, and food insecurity. Based on empirical insights, this paper shows how short-sighted climate responses can adversely affect gender equity, illustrated through three adaptation strategies. First, agricultural institutions have traditionally and historically linked with gender roles. Outmigration from the region is gendered as males leave first. This forces increased household and farm responsibilities onto female household members and increased vulnerability. This gendered vulnerability becomes …


Appendix A-F For Food Waste, Food Insecurity, And The Globalization Of Food Banks, Daniel N. Warshawsky Jan 2023

Appendix A-F For Food Waste, Food Insecurity, And The Globalization Of Food Banks, Daniel N. Warshawsky

Geography Faculty Publications

No abstract provided.


To The Cosmos And Back: Modelling Ritualized Movement And Natural Sanctuaries Around The Manialtepec Lagoon, Sami Savateri Jan 2023

To The Cosmos And Back: Modelling Ritualized Movement And Natural Sanctuaries Around The Manialtepec Lagoon, Sami Savateri

Electronic Theses and Dissertations, 2020-2023

Depictions of movement in Late Postclassic and early Colonial Mesoamerican art, maps, and documents show a multi-faceted conception of movement as not only a means of physical travel through the landscape of the mundane world, but also a means to reach the cosmic realms of divine forces. In this thesis, I explored the intersection of movement and ritual in Late Postclassic Oaxaca by modelling a hypothetical ritual circuit around the Manialtepec Lagoon: a bioluminescent lagoon near Oaxaca's Pacific Coast that is significant in oral histories of the Indigenous Chatinos. The Manialtepec Basin lacks the level of continuous occupation or historic …


Mapping Landcover Change And Population Displacement Of Lakshmipur District, Bangladesh Due To Riverbank Erosion From 2001-2021: A Geospatial Approach, Israt Jahan Jan 2023

Mapping Landcover Change And Population Displacement Of Lakshmipur District, Bangladesh Due To Riverbank Erosion From 2001-2021: A Geospatial Approach, Israt Jahan

College of Graduate Studies: Theses & Dissertations

Due to the geographical setting, the Lakshmipur district of Bangladesh experiences adverse effects of global climate change that include but are not limited to natural disasters such as tropical cyclones, storm surges, coastal flooding, and riverbank erosion. While riverbank erosion is an implicit impact of climate change, it directly affects human settlements, agricultural activity, and the overall livelihoods of people in this area. Examining the spatiotemporal changes in land cover and population due to riverbank erosion in this region could help us better understand the dynamics of human-environmental relations. This study aimed to classify land cover for every five years …


The Influence Of Urban Forms And Street Infrastructure On Pedestrian-Motorist Collisions, Taylor J. Foreman Jan 2023

The Influence Of Urban Forms And Street Infrastructure On Pedestrian-Motorist Collisions, Taylor J. Foreman

College of Graduate Studies: Theses & Dissertations

Unwalkable cities are afflicted by serious issues such as increasing rates of pedestrian traffic accidents, public health concerns, and the denied right to have an accessible city. This study examines how different types of urban forms and street infrastructure contribute to the prevalence of traffic accidents in two major metropolitan cities in the United States: Atlanta, Georgia, and Boston, Massachusetts. This study utilizes geospatial analysis through the Average Nearest Neighbor and Optimized Hot Spot Analysis tools to determine the spatial distribution of traffic accidents throughout both cities. Additionally, statistical tests were conducted to explore the relationships between the number of …


Briquetage And Brine: Living And Working At The Classic Maya Salt Works Of Ek Way Nal, Belize, Heather Mckillop, Cory E. Sills Jan 2023

Briquetage And Brine: Living And Working At The Classic Maya Salt Works Of Ek Way Nal, Belize, Heather Mckillop, Cory E. Sills

Geography Faculty Publications and Presentations

Systematic flotation survey and spatial analysis of artifacts at the submerged salt work of Ek Way Nal reveal evidence of a residence, salt kitchens, and additional activities. Ek Way Nal is one of 110 salt works associated with a Late to Terminal Classic (A.D. 600-900) salt industry known as the Paynes Creek Salt Works. Wooden posts that form the walls of 10 buildings are remarkably preserved in a peat bog below the sea floor providing an opportunity to examine surface artifacts in relation to buildings. Numerous salt kitchens have been located at the Paynes Creek Salt Works by evidence of …


Delineating A Stream Network At Gale Crater, Mars, On Arcgis Pro: A Geographic Information Systems Approach, Elpidio Guzman De La Cruz Jan 2023

Delineating A Stream Network At Gale Crater, Mars, On Arcgis Pro: A Geographic Information Systems Approach, Elpidio Guzman De La Cruz

West Chester University Master’s Theses

The northwestern region of the Gale crater experienced flooding in the past. Delineation of stream networks for the northwestern region of Gale Crater, Mars employing geographic information systems (GIS) techniques is applied. The stream network produced by the algorithm in the study traverses the clay unit in Gediz Vallis, and visual HiRISE imagery analysis correlates with a topologic cross section of an inverted river channel of 750 meters wide and 90 meters deep. HiRISE imagery analysis further confirms a sulfate and clay stratigraphic unit in a stream 125 meters wide and 25 meters deep. Lastly, data smoothing procedures in the …