Geography Commons^™

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

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

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 …

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 …

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 …

Human Centeredness: The Foundation For Leadership-As-Practice In Complex Local/Regional Food Networks, Maryann Martinez

Antioch University Dissertations & Theses

Our local and regional food systems are predominately modeled on a failed capitalist market-based economy. In the absence of corporate accountability, and/or support on the federal policy level, local and regional leadership and self-organized networks are critical to the scaling across and evolution of a moral and equitable food system. Networked food systems leaders are developing the capacity to solve wicked problems, and spark change. Understanding the values and practices of local food systems leadership that initiate, influence, and support activities is essential to understanding how to foster conditions for local and regional food network growth. My dissertation research is …

A Near-Real-Time Approach For Monitoring Forest Disturbance Using Landsat Time Series: Stochastic Continuous Change Detection, Su Ye, John Rogan, Zhe Zhu, J. Ronald Eastman

Geography

Forest disturbances greatly affect the ecological functioning of natural forests. Timely information regarding extent, timing and magnitude of forest disturbance events is crucial for effective disturbance management strategies. Yet, we still lack accurate, near-real-time and high-performance remote sensing tools for monitoring abrupt and subtle forest disturbances. This study presents a new approach called ‘Stochastic Continuous Change Detection (S-CCD)’ using a dense Landsat data time series. S-CCD improves upon the ‘COntinuous monitoring of Land Disturbance (COLD)’ approach by incorporating a mathematical tool called the ‘state space model’, which treats trends and seasonality as stochastic processes, allowing for modeling temporal dynamics of …

The Total Operating Characteristic From Stratified Random Sampling With An Application To Flood Mapping, Zhen Liu, Robert Gilmore Pontius

Geography

The Total Operating Characteristic (TOC) measures how the ranks of an index variable distinguish between presence and absence in a binary reference variable. Previous methods to generate the TOC required the reference data to derive from a census or a simple random sample. However, many researchers apply stratified random sampling to collect reference data because stratified random sampling is more efficient than simple random sampling for many applications. Our manuscript derives a new methodology that uses stratified random sampling to generate the TOC. An application to flood mapping illustrates how the TOC compares the abilities of three indices to diagnose …

Joint Co2 Mole Fraction And Flux Analysis Confirms Missing Processes In Casa Terrestrial Carbon Uptake Over North America, Sha Feng, Thomas Lauvaux, Christopher A. Williams, Kenneth J. Davis, Yu Zhou, Ian Baker, Zachary R. Barkley, Daniel Wesloh

Geography

Terrestrial biosphere models (TBMs) play a key role in the detection and attribution of carbon cycle processes at local to global scales and in projections of the coupled carbon-climate system. TBM evaluation commonly involves direct comparison to eddy-covariance flux measurements. We use atmospheric CO2 mole fraction ([CO2]) measured in situ from aircraft and tower, in addition to flux-measurements from summer 2016 to evaluate the Carnegie-Ames-Stanford-Approach (CASA) TBM. WRF-Chem is used to simulate [CO2] using biogenic CO2 fluxes from a CASA parameter-based ensemble and CarbonTracker version 2017 (CT2017) in addition to transport and CO2 boundary condition ensembles. The resulting “super ensemble” …

Beyond Biomass To Carbon Fluxes: Application And Evaluation Of A Comprehensive Forest Carbon Monitoring System, Yu Zhou, Christopher A. Williams, Natalia Hasler, Huan Gu, Robert Kennedy

Geography

Accurate quantification of forest carbon stocks and fluxes over regions is needed to monitor forest resources as they respond to changes in climate, disturbance and management, and also to evaluate contributions of forest sector to the regional and global carbon balances. In previous work we introduced a national forest carbon monitoring system (NFCMS) that combines forest inventory data, satellite remote sensing of stand biomass and forest disturbances, and an ecosystem carbon cycle model to assess contemporary forest carbon dynamics at a 30 m resolution. In this study, we evaluate the NFCMS estimates of biomass and carbon fluxes with available data …

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 …

Field-Scale Soil Moisture Bridges The Spatial-Scale Gap Between Drought Monitoring And Agricultural Yields, Noemi Vergopolan, Sitian Xiong, Lyndon Estes, Niko Wanders, Nathaniel W. Chaney, Eric F. Wood, Megan Konar, Kelly Caylor, Hylke E. Beck, Nicolas Gatti, Tom Evans, Justin Sheffield

Geography

Soil moisture is highly variable in space and time, and deficits (i.e., droughts) play an important role in modulating crop yields. Limited hydroclimate and yield data, however, hamper drought impact monitoring and assessment at the farm field scale. This study demonstrates the potential of using field-scale soil moisture simulations to support highresolution agricultural yield prediction and drought monitoring at the smallholder farm field scale. We present a multiscale modeling approach that combines HydroBlocks a physically based hyper-resolution land surface model (LSM) with machine learning. We used HydroBlocks to simulate root zone soil moisture and soil temperature in Zambia at 3 …

In-Flux: Economic And Community Adaptations Of Former Timber Mill-Towns In The American West, Cherilyn P. Ashmead

Cal Poly Humboldt theses and projects

Once built around natural resource extractive industries, rural communities’ economies are changing as the United States is transitioning away from its industrial past. While much research has focused on rural economic shifts from natural resource production toward amenity-driven economies (Morzillo et al., 2015; Winkler et al, 2007), less research has explored the economic and demographic trends in areas pursuing new modes of production. This two-part study focuses on an understudied region with historic ties to timber in dry mixed-conifer forests, much of which are under federal land management. With few natural amenity draws, the region has largely maintained production-based sectors. …

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 …

Toward The Development Of Deep Learning Analyses For Snow Avalanche Releases In Mountain Regions, Yunzhi Chen, Wei Chen, Omid Rahmati, Fatemeh Falah, Dominik Kulakowski, Saro Lee, Fatemeh Rezaie, Mahdi Panahi, Aref Bahmani, Hamid Darabi, Ali Torabi Haghighi, Huiyuan Bian

Geography

Snow avalanches impose a considerable threat to infrastructure and human safety in snow bound mountain areas. Nevertheless, the spatial prediction of snow avalanches has received little research attention in many vulnerable parts of the world, particularly in developing countries. The present study investigates the applicability of a stand alone convolutional neural network (CNN) model, as a deep learning approach, along with two metaheuristic algorithms including grey wolf optimization (CNN-GWO) and imperialist competitive algorithm (CNN-ICA) in snow avalanche modelling in the Darvan watershed, Iran. The analysis was based on thirteen potential drivers of avalanche occurrence and an inventory map of previously …

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, …

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

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 …

Humboldt Bay Shoreline, North Eureka To South Arcata: A History Of Cultural Influences, Jerry Rohde

Trade & Scholarly Monographs

In 1850 the area east of Arcata Bay was a tapestry of wetlands and sloughs, fringed by conifer-clad hillsides. Canoe channels and trails connected a string of Wiyot villages that nearly encircled the bay.

Then white settlers arrived, establishing towns at Eureka and Union (Arcata). With them came profound changes in the landscape. Rock quarries. Log drives. “Reclaimed” ranchland. An airport. Four and a half railroads. In 170 years the area was transformed into a web of structures and infrastructures that connected what became the two largest cities in Humboldt County.

Recently a new period of change has begun, promising …

Exploring Spatial Patterns Of Virginia Tornadoes Using Kernel Density And Space-Time Cube Analysis (1960-2019), Michael J. Allen, Thomas R. Allen, Christopher Davis, George Mcleod, Wolfgang Kainz (Ed.), Dean Kyne (Ed.)

Political Science & Geography Faculty Publications

This study evaluates the spatial-temporal patterns in Virginia tornadoes using the National Weather Service Storm Prediction Center’s Severe Weather GIS (SVRGIS) database. In addition to descriptive statistics, the analysis employs Kernel Density Estimation for spatial pattern analysis and space-time cubes to visualize the spatiotemporal frequency of tornadoes and potential trends. Most of the 726 tornadoes between 1960–2019 occurred in Eastern Virginia, along the Piedmont and Coastal Plain. Consistent with other literature, both the number of tornadoes and the tornado days have increased in Virginia. While 80% of the tornadoes occurred during the warm season, tornadoes did occur during each month …

Archaeobiogeography Of Extinct Rice Rats (Oryzomyini) In The Lesser Antilles During The Ceramic Age (500 Bce–1500 Ce), Marine Durocher, Violaine Nicolas, Sophia Perdikaris, Dominique Bonnissent, Gwenola Robert, Karyne Debue, Allowen Evin, Sandrine Grouard

School of Global Integrative Studies: Faculty Publications

During the Ceramic Age (500 BCE–1500 CE), Lesser Antilles rice rats (tribe Oryzomyini) made up a significant portion of the diet of Caribbean islanders. Archaeological excavations across the archipelago resulted to the discovery of large quantities of remains from to these now extinct taxa. It offers a unique opportunity to investigate the past biogeography of this taxon of high cultural and ecological importance. We have studied 1,140 first lower molars originating from 40 archaeological sites across eleven islands of the Lesser Antilles archipelago using two-dimensional geometric morphometric approaches to establish spatiotemporal pat-terns relying on phenotypic variations. This study identified three …

Records Of Hippoboscidae From Mongolian Birds Of Prey With Checklist, Update, Matthias Jentzsch, Benjamin Meissner, Nayamsuren Batsaikhan, Annegret Stubbe, Michael Stubbe

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

The hippoboscid species Ornithophila gestroi has been rediscovered from Mongolia. It is the easternmost of all the known occurrences. Specimens were collected from Amur Falcon Falco amurensis, Saker Falcon Falco cherrug, Lesser Kestrel Falco naumanni, Eurasian Hobby, Falco subbuteo, Common Kestrel Falco tinnunculus Linnaeus, 1758 and Black Kite Milvus migrans in a breeding area located in southern Mongolia. Amur Falcon, Eurasian Hobby and Black Kite were identified as hosts of O. gestroi for the first time.

A Hand-Held Structure From Motion Photogrammetric Approach To Riparian And Stream Asseessment And Monitoring, Joseph M. Dehnert, Joseph Dehnert

Graduate Student Theses, Dissertations, & Professional Papers

Two of the biggest weaknesses in stream restoration and monitoring are: 1) subjective estimation and subsequent comparison of changes in channel form, vegetative cover, and in-stream habitat; and 2) the high costs in terms of financing, human resources, and time necessary to make these estimates. Remote sensing can be used to remedy these weaknesses and save organizations focused on restoration both money and time. However, implementing traditional remote sensing approaches via autonomous aerial systems or light detection and ranging systems is either prohibitively expensive or impossible along small streams with dense vegetation. Hand-held Structure from Motion Multi-view Stereo (SfM-MVS) photogrammetric …

Analyzing Perceptions Of Citizen Science As Part Of An International Learning Experience, Katelyn Marie Miner

Dissertations and Theses @ UNI

This study focused on a perceptions-based citizen science project that emphasizes meaning over measurement. Specifically, student perceptions of citizen science in a unique location, rather than the specific data outcomes of the water quality citizen science activity were analyzed. Many researchers have used citizen science participants to collect samples from water sources around them, increasing the use of mass data collection for scientific purposes.This study was a mixed-methods design, using triangulation of the pre-survey, modified focus group, and post-survey. The goal was to gauge the perceptions of participants in perceived benefits and gains before and after participating in a water …

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 …

Will Zoning Fix Itself?, Michael Lewyn

Scholarly Works

Typically, zoning artificially limits housing supply, thus increasing housing costs. One possible defense of this system is that zoning can fix itself- that is, that when rents and housing costs become unusually high, politicians will deregulate and thus reduce housing costs. This article suggests that such a happy result is unlikely; instead, where housing costs spiral out of control, voters and politicians are likely to make regulation even more strict out of a fear of gentrification.

Geospatially-Intelligent Three-Dimensional Multivariate Methods For Multiscale Dasymetric Mapping Of Urban Population: Application And Performance In The Minneapolis-St. Paul Metropolitan Area, Nikolay Golosov

Dissertations and Theses @ UNI

The wide availability of remote sensing data, the development of computer technology, and the accessibility of census data in the digital form created new opportunities for highly accurate population estimates. Of particular scientific interest is the method of dasymetric mapping, which can significantly improve the spatial accuracy of mapping socio-demographic processes. In addition to population density, the method has considerable potential in mapping the distribution of other social, economic and demographic variables, such as income level, crime, ethnicity, etc. Another significant gap in the existing studies is the development of three-dimensional dasymetric mapping methods.

This study is focused on developing …

The Atmospheric Carbon And Transport (Act)-America Mission, Kenneth J. Davis, Edward V. Browell, Sha Feng, Thomas Lauvaux, Michael D. Obland, Sandip Pal, Bianca C. Baier, David F. Baker, Ian T. Baker, Zachary R. Barkley, Kevin W. Bowman, Yu Yan Cui, A. Scott Denning, Joshua P. Digangi, Jeremy T. Dobler, Alan Fried, Tobias Gerken, Klaus Keller, Bing Lin, Amin R. Nehrir, Caroline P. Normile, Christopher W. O'Dell, Lesley E. Ott, Anke Roiger, Andrew E. Schuh, Colm Sweeney, Yaxing Wei, Brad Weir, Ming Xue, Christopher A. Williams

Geography

The Atmospheric Carbon and Transport (ACT)-America NASA Earth Venture Suborbital Mission set out to improve regional atmospheric greenhouse gas (GHG) inversions by exploring the intersection of the strong GHG fluxes and vigorous atmospheric transport that occurs within the midlatitudes. Two research aircraft instrumented with remote and in situ sensors to measure GHG mole fractions, associated trace gases, and atmospheric state variables collected 1,140.7 flight hours of research data, distributed across 305 individual aircraft sorties, coordinated within 121 research flight days, and spanning five 6-week seasonal flight campaigns in the central and eastern United States. Flights sampled 31 synoptic sequences, including …

Mapping Ethnophysiographies: An Investigation Of Toponyms And Land Cover Of Missoula County, Montana, Emily L. Cahoon

Graduate Student Theses, Dissertations, & Professional Papers

This thesis investigates the ethnophysiography of Missoula County, Montana via place names. Toponyms and landscape have been observed to have a relationship that can be studied through many lenses. Ethnophysiography, the study of how language and landscape relate to each other via human conceptualization, is a lens that was applied to this thesis because it recognizes the embodied information that toponyms carry and investigates landscape accordingly. Thus, the following research seeks to understand if ethnophysiographic diversity exists between toponyms in the Salish and English languages of Missoula County, Montana by analyzing place names and land cover in GIS and analyzing …

Investigating The Spatial Behavior And Habitat Use Of The Matschie’S Tree-Kangaroo (Dendrolagus Matschiei) Using Gps Collars And Unmanned Aircraft Systems (Uas), Jonathan B. Byers

Graduate Student Theses, Dissertations, & Professional Papers

Understanding the movement patterns and habitat needs of the endangered Matschie’s tree-kangaroo (Dendrolagus matschiei) is important for their conservation and management. Endemic to the montane cloud forests of the Huon Peninsula in northeastern Papua New Guinea, these elusive arboreal marsupials are tremendously challenging to study using traditional observational methods.

This study is an assessment of novel techniques to overcome the significant challenges to in-situ data collection in remote and rugged tropical cloud forests. Animal locations are remotely tracked using purpose built altitude and motion logging GPS collars and habitat structure data is measured using photogrammetry from small Unmanned Aircraft …