Digital Commons Network^™

The Rise Of Native Lordships At Pashash, A.D. 200–600, North Highlands Of Ancash, Peru, George F. Lau, Milton Luján Dávila, Jacob L. Bongers, David Chicoine

Faculty Publications

This article examines the rise of native, segmentary lordships in the highlands of north-central Peru. It reports on new excavations and mapping at the seat of a prehispanic polity, Pashash (Recuay culture), a large hilltop center that developed after the collapse of Chavín civilization. Fieldwork revealed monumental constructions and two special activity contexts radiocarbon-dated to ca. a.d. 200–400: an offering area in a large palatial compound and a room-complex with chambers closed off and sealed with feasting refuse. Multiple lines of evidence help reconstruct a regional picture for the establishment of wealthy local elites. Cultural innovations explicitly link new leaders …

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

Faculty Publications

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 …

Disparities In Spatial Accessibility Of Primary Care In Louisiana: From Physical To Virtual Accessibility, Fahui Wang, Yutian Zeng, Lingbo Liu, Tracy Onega

Faculty Publications

Telehealth has been widely employed and has transformed how healthcare is delivered in the United States as a result of COVID-19 pandemic. While telehealth is utilized and encouraged to reduce the cost and travel burden for access to healthcare, there are debates on whether telehealth can promote equity in healthcare services by narrowing the gap among diverse groups. Using the Two-Step Floating Catchment Area (2SFCA) and Two-Step Virtual Catchment Area (2SVCA) methods, this study compares the disparities of physical and virtual access to primary care physicians (PCPs) in Louisiana. Both physical and virtual access to PCPs exhibit similar spatial patterns …

A Cyclically Adjusted Spatio-Temporal Kernel Density Estimation Method For Predictive Crime Hotspot Analysis, Ya Han, Yujie Hu, Haojie Zhu, Fahui Wang

Faculty Publications

This paper presents a new method for predictive crime hotspot analysis that further improves the kernel density estimation (KDE) method and the spatio-temporal kernel density estimation (STKDE) method by accounting for temporal crime cycles and is therefore termed the ‘cyclically adjusted STKDE (cSTKDE) method’. The case study on robbery incidents in Baton Rouge, Louisiana, shows a temporal cycle with a 6-month period of statistical significance from January 2010 to May 2018. This identified period is incorporated into the temporal kernel function of the new cSTKDE method. For validation, the Forecast Accuracy Index (FAI) and Forecast Precision Index (FPI) are used …

Exploring The Spatial Autocorrelation In Soil Moisture Networks: Analysis Of The Bias From Upscaling The Texas Soil Observation Network (Txson), Yaping Xu, Cuiling Liu, Lei Wang, Lei Zou

Faculty Publications

Microwave remote sensing such as soil moisture active passive (SMAP) can provide soil moisture data for agricultural and hydrological studies. However, the scales between station-measured and satellite-measured products are quite different, as stations measure on a point scale while satellites have a much larger footprint (e.g., 9 km). Consequently, the validation for soil moisture products, especially inter-comparison between these two types of observations, is quite a challenge. Spatial autocorrelation among the stations could be a contribution of bias, which impacts the dense soil moisture networks when compared with satellite soil moisture products. To examine the effects of spatial autocorrelation to …

A Peculiar Institution: White Supremacy And The Black Guides Of Mammoth Cave, Seth Garcia

Libraries Award for Undergraduate Scholarship

Intensive tourist operations at Mammoth Cave began in 1838 when Frank Gorin purchased the cave property. He brought with him Stephen Bishop, an enslaved person who would become famous across the Western world for his explorations of the cave and his knowledge of its geology. Gorin would also lease Nicholas and Matterson Bransford, and these three men would begin a 100-year history of black guides at Mammoth Cave. This essay utilizes source material written by white visitors in diaries, guidebooks, and travelers’ accounts to better understand white supremacy during the mid to late 19th century. The guides were in a …

Village Of Grand Ridge Gis Utility Mapping: Effective Decision Making And Cost Benefits, Nick Harsted

Geography and the Environment: Graduate Student Capstones

According to Worldpopualtionreview.com, “As of 2018, there are 19,495 incorporated cities, towns and villages in the United States. Of those, 14,768 have populations below 5,000. Only ten have populations above 1 million and none are above 10 million. There are 310 cities considered at least medium cities with populations of 100,000 or more.” According to the U.S Census Bureau stats, “about 80% of the United States population lives in urban areas.” Within these cities or towns are underground utility infrastructures such as water lines and sewer pipes. For years cities have stored in files and boxes these construction plans explaining …

Developing A Standard Operating Procedure For Irrigated Agricultural Field Delineation And Irrigation Identification Using Examples From The Oregon-Idaho Border And Central California, Scott Milleson

Masters in GIS Practicum Reports

This practicum draws from experience working as an intern for The Freshwater Trust (an environmental nonprofit organization based in Portland, Oregon) from June to December of 2022. The work performed in this internship involved the delineation of agricultural fields using ArcGIS Online, an online collaborative mapping tool, as well as identifying and assigning irrigation type attributes on the Oregon-Idaho border along the Snake River, and the Deschutes Basin.

The purpose of this practicum project is to create a generalized guide for the delineation of agricultural fields and identification of irrigation type using a standard operating procedure for GIS interns, mapathon …

Black Businesses Matter: A Longitudinal Study Of Black-Owned Restaurants In The Covid-19 Pandemic Using Geospatial Big Data, Xiao Huang, Xiaoqi Bao, Zhenlong Li, Shaozeng Zhang, Bo Zhao

Geosciences Faculty Publications and Presentations

Black communities in the United States have been disproportionately affected by the COVID-19 pandemic; however, few empirical studies have been conducted to examine the conditions of Black-owned businesses in the United States during this challenging time. In this article, we assess the circumstances of Black-owned restaurants during the entire year of 2020 through a longitudinal quantitative analysis of restaurant patronage. Using multiple sources of geospatial big data, the analysis reveals that most Black-owned restaurants in this study are disproportionately affected by the COVID-19 pandemic among different cities in the United States over time. The finding reveals the need for a …

Water Stories: An Exploration Of Human-Water Connectedness In Ontario And The Implications For Water Sustainability, Tracey Ehl

Theses and Dissertations (Comprehensive)

Abstract

Water is the great connector. Water connects people, health, wellness, culture, spirituality, nature, and the economy. Clean, safe water (potable water) and sanitation were recognized over a decade ago by the United Nations General Assembly (UN) as a basic human right, and more recently the UN has also identified water sustainability and management as one of 17 sustainable development goals for all people in all countries. Water is inextricably connected to humans. Yet, in Ontario, Canada, a place with access to some of the largest freshwater reserves in the world, robust regulatory frameworks, involvement, some investment by all levels …

“To Be Involved In A Meaningful Way”: Mobilizing Indigenous Knowledge In Environmental Monitoring Practices In Northern Ontario, Alanna Robbins

Theses and Dissertations (Comprehensive)

A steady shift in the environmental management literature encourages greater inclusion of traditional knowledge (TK) alongside Western science, much of it seeking to directly support Indigenous communities develop their own frameworks for environmental monitoring and stewardship. To date, little attention has been placed on research practices themselves as sites where interdisciplinary and intercultural work takes place to bridge between different knowledge systems and develop best practices for effective collaboration. Matawa Water Futures (MWF), the object of study for this thesis project, is a three-year water stewardship project involving Indigenous and non-Indigenous researchers, environmental managers, and community interns, working with the …

Utilizing Ground-Penetrating Radar To Estimate The Spatial Distribution Of Snow Depth Over Lake Ice In Canada’S Sub-Arctic, Alicia Pouw

Theses and Dissertations (Comprehensive)

With the expected rise in air temperature, it becomes important to understand how snow will respond in different climate scenarios. The presence of snow over lake ice largely influences the ice thickness, and as Canada’s Arctic and sub-arctic regions are experiencing warming at twice the global rate, concerns rise as changes in the snowpack will significantly impact northern communities that rely on lake ice as a means of transportation, source for drinking water, and feeding their families. The distribution of snow depth is highly sensitive to changes in climate over time, as such a slight increase in air temperature or …

Wildlife Value Orientations And Recreation Conflict: A Focus On Hunters And Non-Hunters In Alberta, Canada, Yuvana Sequeira

Theses and Dissertations (Comprehensive)

Parks and other forms of protected areas are considered a vital tool in the effective conservation of biodiversity. These areas also provide important spaces for nature-based tourism and recreation (NBTR), where activities such as hiking, swimming, canoeing, and socializing with friends and family often occur. In some cases, hunting may also occur within a protected area, but there is little understanding of how such activities affect the experience and overall satisfaction of other recreationists (and vise-versa). While NBTR is a popular and growing industry, there is limited research in Canada about the values of tourists and recreationists and the …

“Anything From The Land Is Good”: Understanding How Community Gardening In Kakisa, Northwest Territories, Can Contribute To Indigenous Food Sovereignty, Michelle Malandra

Theses and Dissertations (Comprehensive)

Rates of food insecurity in Canada’s northern Indigenous communities are at levels that should constitute an emergency. Dominant explanations for these high rates of food insecurity often ignore the ongoing impacts of colonization and over-emphasize individual choices and nutritional guidelines developed by outsiders. The importance of holistic community health is ignored, along with the cultural and social values and practices that support community health and well-being, including traditional food systems. As the acute impact of climate change in the North threatens traditional food access, a shift toward an Indigenous food sovereignty approach in health and food policy is needed. With …

The Othering Of An Empire: A Historiographical And Pedagogical Assessment Of Orientalism, Genghis Khan, And The Mongol Empire, Edward Stehr

History - Master of Arts in Teaching

I. Synthesis Essay………………………………....3

II. Primary Documents and Headnotes………....28

III. Textbook Critique……………………………...40

IV. New Textbook Entry…………………………..44

V. Bibliography…………………………………....50

Revolution, Conflict, Revolt, Uprising, Among Other Adjectives: Resistance Movements In Colonial Sudan, Edibeth Mencía Roy

History - Master of Arts in Teaching

I. Synthesis Essay………………………………3

II. Primary Documents and Headnotes……….21

III. Textbook Critique……………………………30

IV. New Textbook Entry………………………...33

V. Bibliography…………………………………..36

The Road That Never Existed: Orientalist Myth Making Within The Historiography Of The Silk Road, Margaret Kathryn Curtin

History - Master of Arts in Teaching

I. Synthesis Essay………………………………....4

II. Primary Documents and Headnotes………....28

III. Textbook Critique……………………………...40

IV. New Textbook Entry………………………......45

V. Bibliography…………………………………....48

Where The Fruit Grows, We’Ll Start Over: Rethinking The Great Migration’S Limitless Impact, Luna Flores-Ramirez

History - Master of Arts in Teaching

I. Synthesis Essay……………………………….2

II. Primary Documents and Headnotes……….20

III. Textbook Critique…………………………….33

IV. New Textbook Entry…………………………36

V. Bibliography…………………………………...19

การประยุกต์เทคโนโลยีภูมิสารสนเทศเพื่อประเมินศักยภาพพื้นที่สีเขียวสำหรับความยืดหยุ่นปรับตัวของเมืองในจังหวัดสมุทรสาคร, กรรณิการ์ จันทร์ชิดฟ้า

Chulalongkorn University Theses and Dissertations (Chula ETD)

การกลายเป็นเมืองอย่างรวดเร็วของจังหวัดสมุทรสาครส่งผลกระทบต่อการเปลี่ยนแปลงของพื้นที่สีเขียวและพื้นที่สาธารณะของเมืองทำให้มีความจำเป็นเร่งด่วนในการเสริมสร้างศักยภาพเพื่อปรับปรุงระบบนิเวศที่จำเป็นของเมืองและสร้างอนาคตที่ยั่งยืนสำหรับทุกคน งานวิจัยนี้มีวัตถุประสงค์เพื่อวิเคราะห์ลักษณะการเปลี่ยนแปลงของพื้นที่สีเขียวในจังหวัดสมุทรสาคร และประเมินศักยภาพพื้นที่สีเขียวที่เหมาะสมต่อความยืดหยุ่นปรับตัวของเมืองในจังหวัดสมุทรสาคร ด้วยการประยุกต์ใช้ระบบสารสนเทศภูมิศาสตร์ การวิเคราะห์แบบหลายเกณฑ์โดยวิธีกระบวนการลำดับชั้นเชิงวิเคราะห์ และการสังเคราะห์ความเชื่อมโยงพื้นที่สีเขียวและความยืดหยุ่นปรับตัวของเมือง โดยใช้ข้อมูลจากกรมพัฒนาที่ดิน ความคิดเห็นของผู้เชี่ยวชาญ และการสัมภาษณ์ผู้รู้ในพื้นที่ ผลการศึกษามีดังนี้ (1) จังหวัดสมุทรสาครมีการเปลี่ยนแปลงการใช้ที่ดินระหว่าง ปี พ.ศ. 2543 ถึง ปี พ.ศ. 2564 เท่ากับ ร้อยละ 35.13 ของพื้นที่จังหวัด โดยพื้นที่เกษตรกรรมเป็นพื้นที่ที่มีการเปลี่ยนไปเป็นที่ดินประเภทอื่น ๆ มากที่สุด คิดเป็นร้อยละ 63.20 ของการเปลี่ยนแปลงการใช้ที่ดินทั้งหมด ซึ่งเป็นการเปลี่ยนไปเป็นการใช้ที่ดินประเภทพื้นที่ชุมชนและสิ่งปลูกสร้างมากที่สุด ร้อยละ 59.46 ของการเปลี่ยนแปลงในพื้นที่เกษตรกรรม ทำให้เห็นว่าพื้นที่สีเขียวมีแนวโน้มลดลงและพื้นที่เมืองมีแนวโน้มเพิ่มขึ้น โดยรูปแบบการใช้ที่ดินนี้สะท้อนให้เห็นถึงการเปลี่ยนแปลงตามการพัฒนาทางเศรษฐกิจและการประกอบอาชีพของจังหวัด (2) การประเมินศักยภาพพื้นที่สีเขียวที่เหมาะสมต่อความยืดหยุ่นปรับตัวของเมือง ประกอบด้วยเกณฑ์หลัก 4 ด้าน คือ เศรษฐกิจ-สังคม กายภาพ ธรรมชาติและสภาพแวดล้อม และการเข้าถึงโครงสร้างพื้นฐานที่สำคัญ ผลการประเมินศักยภาพของพื้นที่สีเขียวที่เหมาะสมต่อความยืดหยุ่นปรับตัวของเมือง พบว่า นอกเหนือจากร้อยละ 26.72 ที่เป็นพื้นที่เมืองแล้วนั้น พื้นที่ร้อยละ 73.28 ของจังหวัด คือ พื้นที่ศักยภาพ ซึ่งสามารถจำแนกเป็น 5 ระดับตามศักยภาพของพื้นที่ในการรองรับการขยายตัวของเมือง ประกอบด้วย ศักยภาพสูงมาก (ร้อยละ 3.86) ศักยภาพสูง (ร้อยละ 61.48) ศักยภาพปานกลาง (ร้อยละ 34.13) ศักยภาพต่ำ (ร้อยละ 0.49) และศักยภาพต่ำมาก (ร้อยละ 0.05) ตามลำดับ พื้นที่ระดับศักยภาพสูงมากส่วนใหญ่เป็นการใช้ที่ดินหลากหลายประเภท ประกอบด้วย สถานที่เพาะเลี้ยงสัตว์น้ำ พืชสวน แหล่งน้ำธรรมชาติ ไม้ผล พื้นที่นา พื้นที่ลุ่ม และ ป่าชายเลน ตามลำดับ พื้นที่เหล่านี้กระจายอยู่ในตำบลต่างๆ ใกล้พื้นที่เขตเมืองและอุตสาหกรรมของจังหวัด เนื่องจากเป็นพื้นที่ที่ต้องการพื้นที่สีเขียวรองรับการขยายตัวของเมืองเพื่อส่งเสริมให้เมืองมีความยั่งยืนและยืดหยุ่น

The Relationship Between Climate Social Vulnerability And Asthma, Diane Nunez

Master's Theses or Doctor of Nursing Practice

Asthma is a chronic respiratory disease that affects millions of people worldwide, the incidence and severity of asthma is influenced influenced by various factors, including air masses, and weather conditions. Asthma can also disproportionately affect different sociodemographics groups, leading to inequalities and injustices. This study used statistical analysis and GIS to analyze the spatial distribution of asthma calls and their relationship to sociodemographic traits in Wichita, KS, Tulsa, OK, and Oklahoma City, OK, and the seasonal distribution of asthma calls and their relationship to air masses. Results show that the relationship between asthma prevalence is higher among certain sociodemographic groups, …

Smoke, Air, Fire, Energy (Safe) In Rural California: Critical Reflections On An Interdisciplinary Research Collaboration, Deepti Chatti, Carisse Geronimo, Cassidy Barrientos, Jana Ganion, Malcolm Moncheur, Peter Alstone Phd, Shawn Bourque, Tanya Garcia, Tesfayohanes Yacob

Humboldt Journal of Social Relations

This article provides a synthesis of the interconnected problems of tenuous energy access, wildfires, and exposures to high air pollution in Indigenous communities in rural California through the lens of ongoing collaborative research being carried out by researchers at Cal Poly Humboldt, Schatz Energy Research Center, Karuk Department of Natural Resources, and the Blue Lake Rancheria Tribe. The collaboration is funded by the Strategic Growth Council of the state of California, and we hope is the beginning of a longer term relationship between all partners. We are an interdisciplinary team of researchers drawing on energy engineering, air pollution science, and …

Lidar-Change-Based Mapping Of Sediment Movement From An Extreme Rainfall Event, Silvia E. Piovan, Michael E. Hodgson, Paolo Mozzi, Dwayne E. Porter, Bryan Hall

Faculty Publications

Mapping landscape change at fine scales (e.g. < 1.0 m resolution) using airborne LiDAR data from manned aircraft is a significant challenge. This challenge is magnified in disaster response contexts. A combination of collection and processing factors contributes to horizontal and vertical errors (and resulting uncertainty) in each pre- and post-LiDAR derived digital elevation model (DEM). Subsequently, the errors in the change surface from the two (or more) DEMs are an accumulation of the errors in the individual DEMs. Thus, reliable mapping erosion/deposition changes at sub-meter precision in change detection studies using LiDAR data is largely the domain of terrestrial LiDAR or sUAS with LiDAR scanners rather than manned aircraft. Unfortunately, terrestrial and sUAS LiDAR scanners are not well suited for mapping large areas and sUAS collections are subject to additional airspace constraints compared to manned aircraft. In this study, we probed one of the significant issues in airborne LiDAR change projects–vertical height errors from sequential flight lines. A simplified solution for determining flight line vertical biases in areas of low topographic relief with natural cover types was developed and tested for normalizing point clouds. The approach was tested in a fine-scale erosion/deposition study from an extreme rainfall event that eroded and deposited sand at depths of about 1.0 m. Airborne LiDAR had been collected prior to the rainfall event, and another airborne LiDAR collection was made 1 month after the event. Eleven field campaigns to collect reference data and visit anomalies in the change surface were conducted in a 15-month period after the event, beginning 25 February 2016 and ending 8 May 2017. The validation results indicate accuracies for the pre-event and post-event LiDAR derived DEMs were 7.8 cm and 13.0 cm RMSE, respectively. After modeling vertical errors and corrections applied to the post-event point clouds, the RMSE for the post-event DEM was 8.3 cm. In the depositional use case, 27 locations were sampled with auger boreholes/sand pits and compared with LiDAR-based change. The LiDAR-based change detection analysis resulted in predicted sand depth accuracies of 94% with a mean error of 4.7 cm.

Picturing The Future City: Digital Mediation And Creative Placemaking, Jessica Mccallum Breen

Theses and Dissertations--Geography

Creative placemaking is an arts-oriented community development policy that focuses on the potential for art, artists, and cultural organizations to generate social, economic, and cultural vibrancy in their communities and is a primary tool of culture-led (re)development practices (Markusen & Gwada, 2010). Despite the focus of creative placemakers on the local impacts of their work, creative placemaking is more than local, it is both translocal and transcalar. In this dissertation, I examine the role that digital mediation plays in creative placemaking and how it makes visible these translocal and transcalar connections. I begin by outlining a methodology for tracing replicated …

The Psycho-(Geo)Political Driving Forces Of Comfort Women Social Movements In South Korea, Jaeyeon Lee

Theses and Dissertations--Geography

"Comfort women" refers to the estimated 80,000 to 200,000 women who were forced to serve the Japanese imperial army sexually, physically, and mentally during WWII in and beyond the Asia-Pacific region. Since 1992, Korean activists have held the Wednesday Demonstration, which is the weekly protest in front of the Japanese Embassy in Seoul, to call for an official apology and legal compensation from the Japanese government. Since 2011, Korean activists have also installed comfort woman statues in and outside of South Korea.

This dissertation examines the psycho-political driving force behind the Wednesday Demonstration and comfort woman statue movements in South …

Property Protocols And The Spatial Relations Of Real Estate Technologies, Ian Spangler

Theses and Dissertations--Geography

The dissertation contributes to our understanding of the technologically mediated, professionally managed social relations of private property, and specifically, their consequences for housing and home. I analyze standards and protocols for real estate data transfer, such as the multiple listing service, arguing that these standards play an increasingly important role in how real estate capital authenticates property relations. Focusing on technologies that leverage these standards in order to manage, exchange, and marketize housing, I show how standards often derive from moral values grounded in rubrics of white upper-class masculinity and national border-making. In making this argument, I draw on interviews, …

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.

Best Practices For Integrating Climate Change Into Protected And Conserved Area Management Plans And Planning Processes In Canada, Stephanie Barr, Christopher J. Lemieux, Pamela Wright, Jen Hoesen, Claudia A. Haas

Geography and Environmental Studies Faculty Publications

No abstract provided.

Structural Analysis And Interpretation Of Deformation Along The Keweenaw Fault System From Lake Linden To Mohawk, Michigan, Nolan G. Gamet

Dissertations, Master's Theses and Master's Reports

The Keweenaw fault is likely the most significant and most studied fault associated with the Midcontinent Rift System. The fault roughly bisects the Keweenaw Peninsula and places Portage Lake Volcanics (~1.1 Ga) over much younger Jacobsville Sandstone (~1.0 Ga). Published bedrock geology maps with cross sections from the 1950s show the fault as a single continuous trace that is locally associated with smaller cross faults and splays. The accompanying cross-sections show hanging-wall volcanic strata having a well-defined, listric geometry with dip decreasing away from the fault to the northwest.

This M.S. thesis presents a structural analysis and interpretation of the …

Quantifying The Carbon Stored And Sequestered By The Trees On Pomona College’S Campus, Paola A. Giron-Carson

Scripps Senior Theses

We are experiencing a climate crisis that must be confronted with strategic mitigation. Pomona College contributes to the climate crisis through its emissions for which there is a baseline record. However there is no baseline record of the climate mitigation currently performed by the trees on Pomona’s campus through carbon storage. This study seeks to determine a current baseline quantity of carbon stored and sequestrated by Pomona’s trees as well as possible courses of climate mitigation for Pomona College to take. Initial information gathering was conducted through interviews with several stakeholders. This study was conducted using data collected prior to …

Artisanal Mining River Dredge Detection Using Sar: A Method Comparison, Marissa A. Alessi, Peter G. Chirico, Marco Millones

Geography Articles

Challenges exist in monitoring artisanal and small-scale mining (ASM) activities, given their dynamic and often informal nature. ASM takes form through various techniques and scales, including riverine dredging, which often targets the abundant alluvial gold deposits in South America. Remote sensing offers a solution to improve data collection, regulation, and monitoring of the more mobile and elusive ASM activities and their impacts. Mapping ASM riverine dredges using Synthetic Aperture Radar (SAR) is one of the application areas least explored. Three semi-automated detection approaches using Sentinel-1 SAR are compared on their ability to identify dredges with minimal false positives. The methods …