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Articles 751 - 780 of 787
Full-Text Articles in Geography
Sexual And Place-Based Identity: A Life Course Analysis Of Lgbtq+ Undergraduate Understandings Of Climate Change In Appalachia, Brandon Anthony Rothrock
Sexual And Place-Based Identity: A Life Course Analysis Of Lgbtq+ Undergraduate Understandings Of Climate Change In Appalachia, Brandon Anthony Rothrock
Graduate Theses, Dissertations, and Problem Reports (ETD)
LGBTQ+ persons face heightened vulnerability to climate change-induced disasters due to their sexual orientation, gender identity, and gender expression. Yet, there are limited studies that examine how LGBTQ+ students, particularly in a higher-education setting, understand climate change in relation to their sexuality. With a majority of studies on LGBTQ+ persons and climate change focusing on LGBTQ+ experience during and after disaster, there is a gap in understanding LGBTQ+ perceptions of climate change in the day-to-day. Particularly in Appalachia, a region characterized by a strong place-attachment to and a collective identity with the natural environment, studies of marginalized groups’ perceptions of …
Assessing Synthetic Aperture Radar (Sar)-Derived Temporal Patterns And Digital Terrain Data For Palustrine Wetland Mapping, Jaimee L. Pyron
Assessing Synthetic Aperture Radar (Sar)-Derived Temporal Patterns And Digital Terrain Data For Palustrine Wetland Mapping, Jaimee L. Pyron
Graduate Theses, Dissertations, and Problem Reports (ETD)
Palustrine wetland systems are important ecosystems and provide numerous ecosystems services to support society. Unfortunately, they remain under constant threat of devastation due to land use practices and global climate change, which underscores the need to identify, map, and monitor these landscape features. This study explores harmonic coefficients and seasonal median values derived from Sentinel-1 synthetic aperture radar (SAR) data, as well as digital elevation model (DEM)-derived terrain variables, to predict palustrine wetland locations in the Vermont counties of Bennington, Chittenden, and Essex. Support vector machine (SVM) and random forest (RF) machine learning models were used with various combinations of …
A Systematic Method For Measuring Gentrification Using Building Permits Data: A Washington D.C Case Study, Andey Fomil
A Systematic Method For Measuring Gentrification Using Building Permits Data: A Washington D.C Case Study, Andey Fomil
Graduate Theses, Dissertations, and Problem Reports (ETD)
Gentrification can significantly alter the socioeconomic, demographic, and commercial aspects of a city. It is a complex process that transforms the characteristics of entire neighborhoods, modifying not only the observable physical aspects, but also the community structure. Traditional quantitative gentrification measurement approaches assess the process through analysis of Census demographic indicators coupled with field visit analysis of the physical built environment. This study proposes a new gentrification measuring approach that combines traditional Census indicators with a new indicator in the form of City Building Permits. Two GIS spatial analysis techniques are utilized to evaluate the effectiveness and accuracy of the …
A "Warm" Or "Cold" Early Mars: Evidence From Valley Networks, Xuezhi Cang
A "Warm" Or "Cold" Early Mars: Evidence From Valley Networks, Xuezhi Cang
Graduate Research Theses & Dissertations
Although Mars is cold and dry today, many lines of evidence suggest that ancient Mars had large amount of water and surface fluvial processes. However, climate modelers have encountered difficulties in modeling such early warm and wet conditions with an above freezing temperature, mainly due to the Martian orbit being further away from the Sun and the faintness of the young Sun. The main purpose of this dissertation is to test the ancient Martian climate hypotheses by investigating the spatial pattern of valley network (VN) properties that can survive post-formational modification (i.e., the robust characteristics) and by analogizing the Earth …
Views From The Retail Apocalypse: Store Closures, Spatial Accessibility, And Last Mile Delivery Via Drone, Joseph Tokosh
Views From The Retail Apocalypse: Store Closures, Spatial Accessibility, And Last Mile Delivery Via Drone, Joseph Tokosh
Graduate Research Theses & Dissertations
This dissertation examines important activity occurring in the retail industry related to the widespread transformation occurring throughout it. Specifically, it analyzes store closures, spatial accessibility’s role in retail decision making, and the potential market that could be served by a drone delivery system. Store closures of the movie rental chain Family Video, and three department store chains (Macy’s, Sears, and JCPenney) are analyzed through a binary logistic regression. Findings show that the contributory impact of variables toward store closures are different for small businesses like Family Video compared to the large scale department stores. Some of the major differences include …
Time Lags: Insights From The U.S. Long Term Ecological Research Network, Edward B. Rastetter, Mark D. Ohman, Katherine J. Elliott, J. S. Rehage, Victor H. Rivera-Monroy, R. E. Boucek, Edward Castañeda-Moya, Tess M. Danielson, Laura Gough, Peter M. Groffman, C. Rhett Jackson, Chelcy Ford Miniat, Gaius R. Shaver
Time Lags: Insights From The U.S. Long Term Ecological Research Network, Edward B. Rastetter, Mark D. Ohman, Katherine J. Elliott, J. S. Rehage, Victor H. Rivera-Monroy, R. E. Boucek, Edward Castañeda-Moya, Tess M. Danielson, Laura Gough, Peter M. Groffman, C. Rhett Jackson, Chelcy Ford Miniat, Gaius R. Shaver
Advanced Science Research Center
Ecosystems across the United States are changing in complex ways that are difficult to predict. Coordinated long-term research and analysis are required to assess how these changes will affect a diverse array of ecosystem services. This paper is part of a series that is a product of a synthesis effort of the U.S. National Science Foundation’s Long Term Ecological Research (LTER) network. This effort revealed that each LTER site had at least one compelling scientific case study about “what their site would look like” in 50 or 100 yr. As the site results were prepared, themes emerged, and the case …
Operationalizing Resilience: Co-Creating A Framework To Monitor Hard, Natural, And Nature-Based Shoreline Features In New York State, Katinka Wijsman, D. S. Novem Auyeung, Pippa Brashear, Brett F. Branco, Joseph H. Graziano, Kathryn Graziano, Peter M. Groffman, Helen Cheng, Dylan Corbett
Operationalizing Resilience: Co-Creating A Framework To Monitor Hard, Natural, And Nature-Based Shoreline Features In New York State, Katinka Wijsman, D. S. Novem Auyeung, Pippa Brashear, Brett F. Branco, Joseph H. Graziano, Kathryn Graziano, Peter M. Groffman, Helen Cheng, Dylan Corbett
Advanced Science Research Center
There is growing interest in the application of nature-based solutions to adapt to climate change and promote resilience, yet barriers exist to their implementation. These include a perceived lack of evidence of their functioning in comparison to conventional solutions and an inability for existing design, policy, and assessment processes to capture the multiple benefits of these solutions. Positing this as a challenge of operationalizing and measuring resilience, we argue that the concept of resilience needs to be given concrete meaning in applied management contexts. Starting with shoreline vulnerability as a policy problem and natural and nature-based shoreline features as a …
State Changes: Insights From The U.S. Long Term Ecological Research Network, Julie C. Zinnert, Jesse B. Nippert, Jennifer A. Rudgers, Steven C. Pennings, Grizelle González, Merryl Alber, Sara G. Baer, John M. Blair, Adrian Burd, Scott L. Collins, Christopher Craft, Daniela Di Iorio, Walter K. Dodds, Peter M. Groffman, Ellen Herbert, Christine Hladik, Fan Li, Marcy E. Litvak, Seth Newsome, John O’Donnell, William T. Pockman, John Schalles, Donald R. Young
State Changes: Insights From The U.S. Long Term Ecological Research Network, Julie C. Zinnert, Jesse B. Nippert, Jennifer A. Rudgers, Steven C. Pennings, Grizelle González, Merryl Alber, Sara G. Baer, John M. Blair, Adrian Burd, Scott L. Collins, Christopher Craft, Daniela Di Iorio, Walter K. Dodds, Peter M. Groffman, Ellen Herbert, Christine Hladik, Fan Li, Marcy E. Litvak, Seth Newsome, John O’Donnell, William T. Pockman, John Schalles, Donald R. Young
Advanced Science Research Center
Understanding the complex and unpredictable ways ecosystems are changing and predicting the state of ecosystems and the services they will provide in the future requires coordinated, long-term research. This paper is a product of a U.S. National Science Foundation funded Long Term Ecological Research (LTER) network synthesis effort that addressed anticipated changes in future populations and communities. Each LTER site described what their site would look like in 50 or 100 yr based on long-term patterns and responses to global change drivers in each ecosystem. Common themes emerged and predictions were grouped into state change, connectivity, resilience, time lags, and …
Overcoming Loneliness: First-Generation Slavic Immigrants' Experience With Loneliness In The Inland Northwest, Charles C. Crook
Overcoming Loneliness: First-Generation Slavic Immigrants' Experience With Loneliness In The Inland Northwest, Charles C. Crook
EWU Masters Thesis Collection
The plight of loneliness has caused devastation to many social and cultural groups’ well-being. Scholars have analyzed and documented its adverse health such as suicide (Stravynski and Boyer 2001), Alzheimer’s disease (Wilson et al. 2007), depression (Erzen and Çikrikci 2018), immune system complications (Hawkley and Cacioppo 2003), and cardiovascular complications (Hawley and Cacioppo 2003). Some compare its health impacts to smoking 15 cigarettes a day (Health Resources and Services Administration 2019), while others emphasize how loneliness compels people to internet addiction (Ayas and Horzum 2013) and alcohol abuse (Åkerlind and Hörnquist 1992). Among the most susceptible populations to loneliness are …
Transboundary Marine Management In The Sulu-Sulawesi Seascape, Lindsey G. Ellett
Transboundary Marine Management In The Sulu-Sulawesi Seascape, Lindsey G. Ellett
Graduate Student Theses, Dissertations, & Professional Papers
Transboundary conservation aims to facilitate environmental conservation and management at the ecosystem level by operating across political boundaries, through the cooperation of two or more countries. Though there is increased interest and advocation for transboundary conservation initiatives around the world, there remains a limited understanding of how they function on-the-ground. Within this study, I address these gaps in knowledge through two phases of research, both focusing on the Sulu-Sulawesi Seascape as a case study site. Phase I involved a policy analysis of Indonesian, Malaysia, and Philippine policies related to fisheries, coastal zones and protected areas, and environmental quality. Through this …
On The Acceptance Of Urban Beavers In Martinez, California, Zane A. Eddy
On The Acceptance Of Urban Beavers In Martinez, California, Zane A. Eddy
Cal Poly Humboldt theses and projects
As ecosystem engineers, beavers construct complex riparian and wetland habitats that benefit many other species, including endangered salmonids. Through their landscape alterations, beavers also promote increased groundwater recharge and provide refugia during wildfires and high flow events by impounding water and allowing it to spread across the landscape. Prior to the North American colonial fur trapping campaigns, there were between 60 and 400 million beavers in North America. By the beginning of the 20th century, beavers were extirpated from many parts of the continent, however through human efforts, their population has since rebounded to between 10 and 15 million. The …
Factors Inhibiting Implementation Of A Comprehensive Disaster Management Framework In Trinidad And Tobago, Julie Urslin Samaru
Factors Inhibiting Implementation Of A Comprehensive Disaster Management Framework In Trinidad And Tobago, Julie Urslin Samaru
Walden Dissertations and Doctoral Studies
AbstractIdentifying and exploring the factors inhibiting implementation of a comprehensive disaster management framework to guide the operations of disaster management is a public policy imperative for the Republic of Trinidad and Tobago. Despite the increased frequency and severity of natural and human-made disasters during the past decade, challenges continue with ensuring effective levels of preparedness for responding agencies in Trinidad and Tobago. The current study explored the lived experiences of first responding agencies that operate without a comprehensive disaster management framework. Two theoretical frameworks served as the foundation for this study: the advocacy coalition framework and the multiple streams framework, …
Can Stable Isotopes From Tree Rings Improve Our Understanding Of Past Variability In The Southern Annular Mode?, Zachary Grzywacz
Can Stable Isotopes From Tree Rings Improve Our Understanding Of Past Variability In The Southern Annular Mode?, Zachary Grzywacz
Graduate Theses, Dissertations, and Problem Reports (ETD)
Few annually dated stable isotope records exist across Oceania. In mid- to high-latitude locations in South America, tree-ring stable isotopes provide information about past climate dynamics such as the Southern Annular Mode (SAM). The SAM drives latitudinal shifts in Southern Hemisphere westerly winds, influencing temperature and moisture delivery across the mid- to high-latitudes, including Tasmania. Combinations of paleoclimate proxies from across the Southern Ocean might provide insight into dynamic processes like the SAM that are difficult to measure with a single proxy. Measuring stable carbon and oxygen isotope ratios from tree rings in Tasmania could provide complementary data to contribute …
Gis And Remote Sensing Groundwater Potentiality Investigation Of Gulu District, Uganda Using Synthetic Aperture Radar And Magnetic Geophysics, Rachel Ann Jones
Gis And Remote Sensing Groundwater Potentiality Investigation Of Gulu District, Uganda Using Synthetic Aperture Radar And Magnetic Geophysics, Rachel Ann Jones
Doctoral Dissertations
“Developing countries have few resources for ground-based hydrological investigations to determine optimal placement of boreholes for community water access. Remote sensing data are available at a variety of resolutions and sense different parameters, and are useful inputs for hydrologic models, but these data are rarely obtainable in developing countries with the parameters or resolutions necessary for hydrologic applications. This research seeks to use and improve existing remote sensing and GIS techniques to identify areas of optimal water supply in locations with limited geologic or hydrologic information, such as Gulu District, Uganda. Fusing different remotely sensed data sets can produce higher …
Putting Policy In Its Place: Policy Enactment And Engagement Through A Multiscalar Policy-Shed Framework, Barbara L. Maclennan
Putting Policy In Its Place: Policy Enactment And Engagement Through A Multiscalar Policy-Shed Framework, Barbara L. Maclennan
Graduate Theses, Dissertations, and Problem Reports (ETD)
The objective of this research is to examine the spatial components integral to policy formation, implementation, and evaluation. The research uses solid waste as a case study to explore a multiscalar GIS policy-shed framework. To this end, the goal of this dissertation is to examine the spatial nature of public policy. The research applies spatial concepts and multiscalar methodological applications embedded within GIS and geovisualization to explore the complex spaces surrounding public policy implementation and evaluation.
Effects Of Bark Beetle Outbreaks On Forest Landscape Pattern In The Southern Rocky Mountains, U.S.A., Kyle C. Rodman, Robert A. Andrus, Cori L. Butkiewicz, Teresa B. Chapman, Nathan S. Gill, Brian J. Harvey, Dominik Kulakowski, Niko J. Tutland, Thomas T. Veblen, Sarah J. Hart
Effects Of Bark Beetle Outbreaks On Forest Landscape Pattern In The Southern Rocky Mountains, U.S.A., Kyle C. Rodman, Robert A. Andrus, Cori L. Butkiewicz, Teresa B. Chapman, Nathan S. Gill, Brian J. Harvey, Dominik Kulakowski, Niko J. Tutland, Thomas T. Veblen, Sarah J. Hart
Geography
Since the late 1990s, extensive outbreaks of native bark beetles (Curculionidae: Scolytinae) have affected coniferous forests throughout Europe and North America, driving changes in carbon storage, wildlife habitat, nutrient cycling, and water resource provisioning. Remote sensing is a cru-cial tool for quantifying the effects of these disturbances across broad landscapes. In particular, Landsat time series (LTS) are increasingly used to characterize outbreak dynamics, including the presence and severity of bark beetle-caused tree mortality, though broad-scale LTS-based maps are rarely informed by detailed field validation. Here we used spatial and temporal information from LTS products, in combination with extensive field data …
Climate Impacts Of U.S. Forest Loss Span Net Warming To Net Cooling, Christopher A. Williams, Huan Gu, Tong Jiao
Climate Impacts Of U.S. Forest Loss Span Net Warming To Net Cooling, Christopher A. Williams, Huan Gu, Tong Jiao
Geography
Storing carbon in forests is a leading land-based strategy to curb anthropogenic climate change, but its planetary cooling effect is opposed by warming from low albedo. Using detailed geospatial data from Earth-observing satellites and the national forest inventory, we quantify the net climate effect of losing forest across the conterminous United States. We find that forest loss in the intermountain and Rocky Mountain West causes net planetary cooling but losses east of the Mississippi River and in Pacific Coast states tend toward net warming. Actual U.S. forest conversions from 1986 to 2000 cause net cooling for a decade but then …
Assessment Of Empirical And Semi-Analytical Algorithms Using Modis-Aqua For Representing In-Situ Chromophoric Dissolved Organic Matter (Cdom) In The Bering, Chukchi, And Western Beaufort Seas Of The Pacific Arctic Region, Melishia I. Santiago, Karen E. Frey
Assessment Of Empirical And Semi-Analytical Algorithms Using Modis-Aqua For Representing In-Situ Chromophoric Dissolved Organic Matter (Cdom) In The Bering, Chukchi, And Western Beaufort Seas Of The Pacific Arctic Region, Melishia I. Santiago, Karen E. Frey
Geography
We analyzed a variety of satellite-based ocean color products derived using MODIS-Aqua to investigate the most accurate empirical and semi-analytical algorithms for representing in-situ chromophoric dissolved organic matter (CDOM) across a large latitudinal transect in the Bering, Chukchi, and western Beaufort Seas of the Pacific Arctic region. In particular, we compared the performance of empirical (CDOM index) and several semi-analytical algorithms (quasi-analytical algorithm (QAA), Carder, Garver-Siegel-Maritorena (GSM), and GSM-A) with field measurements of CDOM absorption (aCDOM) at 412 nanometers (nm) and 443 nm. These algorithms were compared with in-situ CDOM measurements collected on cruises during July 2011, 2013, 2014, 2015, …
Natural Climate Solutions For Canada, C. Ronnie Drever, Susan C. Cook-Patton, Fardausi Akhter, Pascal H. Badiou, Gail L. Chmura, Scott J. Davidson, Raymond L. Desjardins, Andrew Dyk, Joseph E. Fargione, Max Fellows, Ben Filewod, Margot Hessing-Lewis, Susantha Jayasundara, William S. Keeton, Timm Kroeger, Tyler J. Lark, Edward Le, Sara M. Leavitt, Marie Eve Leclerc, Tony C. Lemprière, Juha Metsaranta, Brian Mcconkey, Eric Neilson, Guillaume Peterson St-Laurent, Danijela Puric-Mladenovic, Sebastien Rodrigue, Raju Y. Soolanayakanahally, Seth A. Spawn, Maria Strack, Carolyn Smyth, Naresh Thevathasan, Mihai Voicu, Christopher A. Williams
Natural Climate Solutions For Canada, C. Ronnie Drever, Susan C. Cook-Patton, Fardausi Akhter, Pascal H. Badiou, Gail L. Chmura, Scott J. Davidson, Raymond L. Desjardins, Andrew Dyk, Joseph E. Fargione, Max Fellows, Ben Filewod, Margot Hessing-Lewis, Susantha Jayasundara, William S. Keeton, Timm Kroeger, Tyler J. Lark, Edward Le, Sara M. Leavitt, Marie Eve Leclerc, Tony C. Lemprière, Juha Metsaranta, Brian Mcconkey, Eric Neilson, Guillaume Peterson St-Laurent, Danijela Puric-Mladenovic, Sebastien Rodrigue, Raju Y. Soolanayakanahally, Seth A. Spawn, Maria Strack, Carolyn Smyth, Naresh Thevathasan, Mihai Voicu, Christopher A. Williams
Geography
Alongside the steep reductions needed in fossil fuel emissions, natural climate solutions (NCS) represent readily deployable options that can contribute to Canada's goals for emission reductions. We estimate the mitigation potential of 24 NCS related to the protection, management, and restoration of natural systems that can also deliver numerous co-benefits, such as enhanced soil productivity, clean air and water, and biodiversity conservation. NCS can provide up to 78.2 (41.0 to 115.1) Tg CO2e/year (95% CI) of mitigation annually in 2030 and 394.4 (173.2 to 612.4) Tg CO2e cumulatively between 2021 and 2030, with 34% available at ≤CAD 50/Mg CO2e. Avoided …
การวิเคราะห์ศักยภาพในการติดตั้งแผงเซลล์แสงอาทิตย์บนหลังคาโดยใช้เทคโนโลยีภูมิสารสนเทศ, เปรมใจ ซิบเข
การวิเคราะห์ศักยภาพในการติดตั้งแผงเซลล์แสงอาทิตย์บนหลังคาโดยใช้เทคโนโลยีภูมิสารสนเทศ, เปรมใจ ซิบเข
Chulalongkorn University Theses and Dissertations (Chula ETD)
ความต้องการใช้พลังงานไฟฟ้าในประเทศไทยมีแนวโน้มที่เพิ่มขึ้น แต่เชื้อเพลิงที่ใช้เพื่อผลิตไฟฟ้าในประเทศส่วนมากยังเป็นเชื้อเพลิงจากทรัพยากรที่ใช้แล้วหมดไปซึ่งสร้างมลภาวะทางสิ่งแวดล้อม และส่งผลเสียต่อสุขภาพของมนุษย์ ประกอบกับแนวโน้มการลดลงของต้นทุนระบบผลิตไฟฟ้าจากพลังงานแสงอาทิตย์ ทำให้การใช้พลังงานแสงอาทิตย์เพื่อผลิตไฟฟ้าได้รับความนิยมในปัจจุบัน งานวิจัยนี้จึงมีจุดประสงค์เพื่อพัฒนาฐานข้อมูลหลังคาอาคารเพื่อการติดตั้งแผงเซลล์แสงอาทิตย์ วิเคราะห์ศักยภาพของพื้นที่สำหรับการติดตั้งแผงเซลล์แสงอาทิตย์บนหลังคาด้วยปัจจัยทางกายภาพและปัจจัยทางเทคนิคโดยใช้เทคโนโลยีภูมิสารสนเทศ และพัฒนาเว็บแอปพลิเคชันแสดงปริมาณพลังงานไฟฟ้าที่ผลิตได้และระดับศักยภาพของพื้นที่ มีพื้นที่ศึกษาอยู่ที่ ตำบลท่าอิฐ อำเภอปากเกร็ด จังหวัดนนทบุรี การพัฒนาฐานข้อมูลหลังคาอาคารใช้การจำแนกขอบเขตหลังคาด้วยเทคนิควิธีการเรียนรู้เชิงลึก (Deep Learning) โดยสร้างแบบจำลองเพื่อวาดขอบเขตหลังคาอาคารโดยใช้ข้อมูลจากภาพถ่ายจากดาวเทียม WorldView-3 จากนั้นจึงนำฐานข้อมูลไปใช้วิเคราะห์พลังงานไฟฟ้าที่ผลิตได้ และศักยภาพของพื้นที่ในการติดตั้งแผงเซลล์แสงอาทิตย์ ผลการศึกษาพบว่า พื้นที่หลังคาทั้งหมดในพื้นที่ศึกษามีขนาดรวม 749,563.23 ตารางเมตร สามารถคำนวณค่าพลังงานไฟฟ้าที่ผลิตจากแผงเซลล์แสงอาทิตย์บนหลังคาได้ 86.14 กิกะวัตต์-ชั่วโมงต่อปี หมู่บ้านที่มีระดับศักยภาพในการติดตั้งแผงเซลล์แสงอาทิตย์ในระดับสูง ได้แก่ บ้านคลองชมพู่ และบ้านลาดสิงห์ ซึ่งมีศักยภาพในการผลิตไฟฟ้าได้จากแผงเซลล์แสงอาทิตย์ได้มากกว่า 20 กิกะวัตต์-ชั่วโมงต่อปี ผลการวิจัยนี้สามารถประยุกต์ใช้เพื่อแนวทางในการพัฒนาฐานข้อมูล การประมาณค่าพลังงาน และศักยภาพในการติดตั้งแผงเซลล์แสงอาทิตย์ในพื้นที่อื่นได้
การประเมินผลกระทบของน้ำท่วมฉับพลันต่อภาคการท่องเที่ยว: กรณีศึกษาจังหวัดน่าน, จุติมา สุตตเขตต์
การประเมินผลกระทบของน้ำท่วมฉับพลันต่อภาคการท่องเที่ยว: กรณีศึกษาจังหวัดน่าน, จุติมา สุตตเขตต์
Chulalongkorn University Theses and Dissertations (Chula ETD)
น้ำท่วมฉับพลันเป็นภัยธรรมชาติที่เกิดขึ้นทุกปีในประเทศไทยโดยเฉพาะจังหวัดน่าน ผลกระทบจากภัยดังกล่าวสร้างความเสียหายต่อชีวิตและทรัพย์สินของประชาชนในหลายภาคส่วน รวมถึงภาคการท่องเที่ยว ซึ่งเป็นภาคส่วนที่สร้างรายได้จำนวนมากให้กับจังหวัด เพราะน่านมีทรัพยากรธรรมชาติและวัฒนธรรมอันมีค่า อย่างไรก็ตามทรัพยากรดังกล่าวมีความอ่อนไหวต่อปัญหาน้ำท่วมฉับพลันซึ่งไม่สามารถหลีกเลี่ยงได้ งานวิจัยนี้จึงมีวัตถุประสงค์เพื่อประเมินพื้นที่เสี่ยงต่อการเกิดน้ำท่วมฉับพลันในจังหวัดน่านโดยใช้แบบจำลองดัชนีชี้วัดศักยภาพการเกิดน้ำท่วมฉับพลัน (Flash Flood Potential Index) และการสร้างแบบจำลองประเมินผลกระทบต่อภาคการท่องเที่ยวโดยมีองค์ประกอบของภาคส่วนการท่องเที่ยวที่มีผลต่อความอ่อนไหวของน้ำท่วม นำมาวิเคราะห์บนระบบสารสนเทศภูมิศาสตร์ ผลการวิเคราะห์ พบว่า พื้นที่ส่วนใหญ่ที่มีความอ่อนไหวต่อการเกิดน้ำท่วมฉับพลันเป็นพื้นที่ทางตอนเหนือของจังหวัดน่าน คือ อำเภอสองแคว อำเภอบ่อเกลือ อำเภอปัว และอำเภอทุ่งช้าง รวมถึงอำเภอเมืองน่าน ซึ่งเป็นพื้นที่ที่มีความลาดชันมาก และเป็นบริเวณที่มีปริมาณน้ำฝนเฉลี่ยรายปีสูงกว่าบริเวณอื่น ในส่วนผลการศึกษาด้านการประเมินผลกระทบของการเกิดน้ำท่วมฉับพลันต่อภาคการท่องเที่ยวในจังหวัดน่าน พบว่า พื้นที่ที่มีโอกาสได้รับผลกระทบมากที่สุด ได้แก่ ตำบลดู่ใต้ ตำบลไชยสถาน ตำบลผาสิงห์ ตำบลในเวียง อำเภอเมืองน่าน ตำบลม่วงตึ๊ด ตำบลฝายแก้วในอำเภอภูเพียง และ ตำบลปัว อำเภอปัว เนื่องจากมีแหล่งท่องเที่ยวสำคัญและที่พักจำนวนมาก ผลที่ได้จากการวิจัยนี้ สามารถเป็นแนวทางให้กับหลายภาคส่วนในการวางแผนเพื่อการเตือนภัย ลดความเสียหายจากภัยพิบัติ และป้องกันความเสียหายอันอาจจะเกิดกับแหล่งท่องเที่ยวและธุรกิจที่เกี่ยวเนื่อง
การหยั่งความลึกน้ำทะเลจากการรับรู้ระยะไกลในอ่าวไทยด้วยภาพถ่ายดาวเทียมแลนด์แซท 8, ชนัตถพงศ์ เสืองามเอี่ยม
การหยั่งความลึกน้ำทะเลจากการรับรู้ระยะไกลในอ่าวไทยด้วยภาพถ่ายดาวเทียมแลนด์แซท 8, ชนัตถพงศ์ เสืองามเอี่ยม
Chulalongkorn University Theses and Dissertations (Chula ETD)
การสำรวจแผนที่ทะเลของประเทศไทยในปัจจุบันมีข้อจำกัดด้านทรัพยากรที่ใช้ในการสำรวจและด้านบุคลากร ทำให้ไม่สามารถสำรวจปรับปรุงแผนที่ทะเลให้มีความทันสมัยและครอบคลุมทั่วประเทศ จึงมีความจำเป็นในการหาเครื่องมือหรือวิธีการในการช่วยหาความลึกน้ำทะเลที่ให้ค่าความถูกต้องของความลึก ประหยัด และรวดเร็วในการสำรวจ งานวิจัยนี้มีวัตถุประสงค์เพื่อประยุกต์ใช้ภาพถ่ายดาวเทียม Landsat 8 ในการวิเคราะห์หาค่าความลึกน้ำทะเลในอ่าวไทย จำนวน 3 พื้นที่ ซึ่งอ้างอิงขอบเขตตาม แผนที่เดินเรือ ได้แก่ พื้นที่อ่าวไทยรูปตัว ก (ทางเข้าแม่น้ำเจ้าพระยา) พื้นที่อ่าวไทยฝั่งตะวันออก (เกาะสะบ้า ถึง เกาะจิกนอก) และพื้นที่อ่าวไทยฝั่งตะวันตก (อ่าวชุมพร) ด้วยเทคนิคการสร้างแผนที่ความลึกน้ำทะเลด้วยวิธี Satellite Derived Bathymetry (SDB) ร่วมกับแบบจำลองอัตราส่วนช่วงคลื่น (Log-Band Ratio Method) เพื่อให้ได้ความลึกน้ำทะเลที่มีความแม่นยำสูงเมื่อเทียบฐานข้อมูลแผนที่เดินเรือจากการสำรวจด้วยวิธีการหยั่งน้ำด้วยเสียงแบบลำคลื่นเดียว ผลวิจัยพบว่าค่าความลึกน้ำทะเลจากภาพถ่ายดาวเทียมช่วงระดับความลึก 0 – 15 เมตร ในพื้นที่อ่าวไทยรูปตัว ก พื้นที่อ่าวไทยฝั่งตะวันออก และพื้นที่อ่าวไทยฝั่งตะวันตก มีค่าสัมประสิทธิ์ตัวกำหนด (R2) เท่ากับ 0.8621, 0.9130 และ 0.9304 ตามลำดับ ผลการศึกษาแสดงให้เห็นว่าการหยั่งความลึกน้ำทะเลด้วยวิธีการ SDB ร่วมกับแบบจำลองอัตราส่วนช่วงคลื่นในทะเลอ่าวไทยทั้ง 3 พื้นที่ กับความลึกน้ำสำรวจด้วยวิธีการหยั่งน้ำด้วยเสียงแบบลำคลื่นเดียวมีความสอดคล้องกันสูงโดยเฉพาะพื้นที่อ่าวไทยฝั่งตะวันตก ดังนั้นวิธีการ SDB ร่วมกับแบบจำลองอัตราส่วนช่วงคลื่นจึงสามารถใช้เป็นเครื่องมือหรือวิธีการทางเลือกในการสนับสนุนการสำรวจแผนที่อุทกศาสตร์ในพื้นที่ที่ต้องการทราบค่าความลึกในช่วงความลึกน้ำไม่เกิน 15 เมตร โดยเฉพาะพื้นที่น้ำตื้นหรือชายฝั่งทะเลที่มีข้อมูลอุทกศาสตร์อยู่เพียงเล็กน้อยหรือไม่มีเลยได้เป็นอย่างดี
High-Intensity Monsoon Rainfall Variability And Its Attributes: A Case Study For Upper Ganges Catchment In The Indian Himalaya During 1901-2013, Alok Bhardwaj, Robert J. Wasson, Winston T. L. Chow, Alan D. Ziegler
High-Intensity Monsoon Rainfall Variability And Its Attributes: A Case Study For Upper Ganges Catchment In The Indian Himalaya During 1901-2013, Alok Bhardwaj, Robert J. Wasson, Winston T. L. Chow, Alan D. Ziegler
Research Collection School of Social Sciences
High-intensity monsoon rainfall in the Indian Himalaya generates multiple environmental hazards. This study examines the variability in long-term trends (1901–2013) in the intensity and frequency of high-intensity monsoon rainfall events of varying depths (high, very high and extreme) in the Upper Ganges Catchment in the Indian Himalaya. Using trend analysis on the Indian Meteorological Department (IMD) rainfall dataset, we find statistically significant positive trends in all categories of monsoon rainfall intensity and frequency over the 113-year period. The majority of the trends for both intensity and frequency are spatially located in the Higher Himalayan region encompassing upstream sections of the …
O Espaço E O Tempo Do Valor, David Harvey, Artur Renzo
O Espaço E O Tempo Do Valor, David Harvey, Artur Renzo
Publications and Research
O artigo discute a lei do valor em Karl Marx como valor em movimento, que se faz valer no espaço e no tempo. Entende-se que o movimento não pode ocorrer no vácuo, sendo necessário abandonar a visão do valor que se move sem estar ancorado em nenhum lugar e passar a enxergá-lo criando geografias de cidades e redes de transportes; formando paisagens agrícolas para a produção de alimentos e matérias-primas; englobando fluxos de pessoas, bens e informações; determinando configurações territoriais de valores fundiários e habilidades de trabalho; organizando espaços de trabalho, estruturas de governo e administração. Conclui-se que há três …
Secondary Risk Theory: Validation Of A Novel Model Of Protection Motivation, Christopher L. Cummings, Sonny Rosenthal, Wei Yi Kong
Secondary Risk Theory: Validation Of A Novel Model Of Protection Motivation, Christopher L. Cummings, Sonny Rosenthal, Wei Yi Kong
Research Collection College of Integrative Studies
Protection motivation theory states individuals conduct threat and coping appraisals when deciding how to respond to perceived risks. However, that model does not adequately explain today's risk culture, where engaging in recommended behaviors may create a separate set of real or perceived secondary risks. We argue for and then demonstrate the need for a new model accounting for a secondary threat appraisal, which we call secondary risk theory. In an online experiment, 1,246 participants indicated their intention to take a vaccine after reading about the likelihood and severity of side effects. We manipulated likelihood and severity in a 2 × …
Guest Editorial: Disaster, State And Science: Historical Narratives Of Extreme Weather In East Asia And The Pacific, Fiona Williamson
Guest Editorial: Disaster, State And Science: Historical Narratives Of Extreme Weather In East Asia And The Pacific, Fiona Williamson
Research Collection School of Social Sciences
This curated special issue asks how history can be used as a lens into disaster and disaster management. It takes as its premise the idea that approaches from different disciplines - including the humanities and social sciences – can offer new perspectives on understanding disaster, managing disaster and disaster risk. The concept is not new, historically focussed studies have long provided meat for hazard investigations and modelling, especially those focused on geological or hydrological time-series analyses; multi-hazard interactions and identifying historical underliers for contemporary risk. It has become increasingly common, for example, to include historians in collaborative efforts to better …
Enhancing Harvester Safety And Traditional Food Access Through Participatory Mapping With The Ka’A’Gee Tu First Nation Of Kakisa, Northwest Territories, Neomi Jayaratne
Enhancing Harvester Safety And Traditional Food Access Through Participatory Mapping With The Ka’A’Gee Tu First Nation Of Kakisa, Northwest Territories, Neomi Jayaratne
Theses and Dissertations (Comprehensive)
Northern Canada has struggled with various systemic challenges based on Eurocentric ideologies, policies, and practices. A major challenge Indigenous communities face North of the 60th parallel is their food security and sovereignty. Inuit, First Nation and Métis populations across the North experience 5 to 6 times higher levels of food insecurity compared to the National average (Food Secure Canada, 2020). These communities face concentrated levels of food system issues, which connect to other factors, such as, health and wellness, the supply chain of market foods, governance, a shift away from traditional foods, and the impacts of climate change. Climate …
Park Agency Social Media Communication During The Covid-19 Crisis, Raluca Oprean
Park Agency Social Media Communication During The Covid-19 Crisis, Raluca Oprean
Theses and Dissertations (Comprehensive)
The COVID-19 pandemic has affected all industries and organizations, including park agencies. There is a lack of research on how park agencies utilize Twitter during times of crisis, specifically during the COVID-19 pandemic. How park agencies communicate with the public and how they use their social media has not been extensively studied. In addition, the coronavirus pandemic is a novel management issue for these agencies, and there has been no empirical analysis in the ways in which information is being communicated to the public or how that information is being perceived.
This study aims to better understand park agency response …
A Spatial Perspective On Decarbonization Efforts: A Comparative Analysis Of Japan And Singapore’S Decarbonization Strategies, Michelle Rio Yoshida
A Spatial Perspective On Decarbonization Efforts: A Comparative Analysis Of Japan And Singapore’S Decarbonization Strategies, Michelle Rio Yoshida
Theses and Dissertations (Comprehensive)
Exploring how spatiality influences public policies and local behaviors towards achieving the goal of a low carbon society could demonstrate the significance of regional knowledge. This research used Tobler’s first law of geography as the conceptual framework to analyze and find similarities in Japan and Singapore’s historical emissions and geographic limitations to achieve their carbon reduction goals. The study collected and compared Japan and Singapore’s historical emissions data, energy consumption trends, and emission trajectory by sector. The research used a mixed-methods approach to identify common practices, relevant public policy frameworks, large-scale emissions reduction projects, and environmental and socioeconomic ground realities …
Evaluating Employees’ Experiences In Implementing Covid-19 Safety Protocols In Ontario Parks, Jessica Kaatz
Evaluating Employees’ Experiences In Implementing Covid-19 Safety Protocols In Ontario Parks, Jessica Kaatz
Theses and Dissertations (Comprehensive)
The COVID-19 pandemic has created a wide range of public health challenges for park management and staff in Ontario. Green spaces have become a source of resilience during the spread of the virus, partly due to their proven positive impacts on social, mental and physical well-being. With the introduction of social distancing protocols, utilization of Personal Protective Equipment (PPE), and standardizing constant sanitation efforts, park employees are more responsible than ever for the daily implementation of rules governing park safety and security. At the same time, increased visitor numbers and continually changing government protocols that varied between regional jurisdictions have …