Geography Commons^™

Impact Of Lidar Nominal Post-Spacing On Dem Accuracy And Flood Zone Delineation, George T. Raber, John R. Jensen, Michael E. Hodgson, Jason A. Tullis, Bruce A. Davis, Judith Berglund

Faculty Publications

Lidar data have become a major source of digital terrain information for use in many applications including hydraulic modeling and flood plane mapping. Based on established relationships between sampling intensity and error, nominal post-spacing likely contributes significantly to the error budget. Post-spacing is also a major cost factor during lidar data collection. This research presents methods for establishing a relationship between nominal post-spacing and its effects on hydraulic modeling for flood zone delineation. Lidar data collected at a low post-spacing (approximately 1 to 2 m) over a piedmont study area in North Carolina was systematically decimated to simulate datasets with …

Key Concepts And Techniques In Gis, Jochen Albrecht

Publications and Research

No abstract provided.

Spatial And Morphological Change Of Eliot Glacier, Mount Hood, Oregon, Keith Michael Jackson

Dissertations and Theses

Eliot Glacier is a small (1.6 km²), relatively well-studied glacier on Mount Hood, Oregon. Since 1901, glacier area decreased from 2.03 ± 0.16 km² to 1.64 ± 0.05 km² by 2004, a loss of 19%, and the terminus retreated about 600 m. Mount Hood's glaciers as a whole have lost 34% of their area. During the first part of the 20th century the glacier thinned and retreated, then thickened and advanced between the 1940s and 1960s because of cooler temperatures and increased winter precipitation and has since accelerated its retreat, averaging about 1.0 m a^{-1 …}

Linking Research And Policy: The Case Of Ghana's Rice Trade Policy, Aharon Degrassi

Faculty Publications, Geography

Agricultural trade policies, in particular import tariffs to protect domestic production, constitute a highly contested field of agricultural policy. In view of the recent focus on “evidence-based policy making†in the international development debate, the question arises as to which extent research-based evidence is used in such policy decisions, and which role research plays as compared to other political factors. Against this background, this paper seeks to examine and explain research-policy linkages in the case of rice tariff reform in Ghana. It is based on literature reviews and 70 interviews. The paper uses a historical cultural political economy approach, and …

The Promises And Prospects Of Geography In Higher Education, Lily Kong

Research Collection School of Social Sciences

The idea for this JGHE symposium came to me as I reflected on the spatial turn in the humanities and social sciences, and felt encouraged by the growing influence of geography in the intellectual spaces of other disciplines. Amidst positive thoughts, I wondered if the institutional position of the discipline had strengthened with its recently enhanced intellectual position, and what the geography of geography's institutional presence and strength was. For sure, anecdotal stories circulate regarding the opening or closure of a geography department, a renaming, a split and so forth…. A symposium of papers from different parts of the world …

Geography's Place In Higher Education In Singapore, Lily Kong

Research Collection School of Social Sciences

Unlike the other papers in this symposium, which deal with countries where there are large numbers of universities, and comparison can be made over time and across space of geography's place in higher education, this paper focuses on a country that was for a long time described as a 'one-university town': Singapore. What interesting story call there be when geography's presence in higher education is so circumscribed? In this paper, the author illustrates how geography's,fate in higher education in Singapore is closely bound up with developments in other parts of the world, not unlike the way in which the country's …

An Analytical Overview Of The Factors Influencing Housing Accessibility Of Bangladeshi Immigrants In Kitchener-Waterloo, Farzana Afreen Propa

Theses and Dissertations (Comprehensive)

This study explores Bangladeshi immigrants’ settlement experiences in Kitchener-Waterloo (K-W) and alyses their housing history, housing search process, barriers and discrimination in accessing housing in the area. It reveals the factors that influence Bangladeshi immigrants housing accessibility in K-W. It also summarises recommendations to support and improve their housing situation. Qualitative research methods were used to collect and document the findings of the research.

The study findings reveal Bangladeshi immigrant households in K-W have comparaitvely higher levels of education compared to mainstream population and better employment condition compared to other Bangladeshi immigrants living in Toronto or Montreal. Many of these …

An Institutional Analysis Of Oil And Gas Sector Development And Environmental Management In The Yukon Territory, Jason C. May

Theses and Dissertations (Comprehensive)

This thesis investigates the ways in which oil and gas development priorities and concern for the environment are integrated within strategic planning and management frameworks, and how associated conflict is addressed, in a case study of the Yukon. Because substantial ground-based oil and gas activity is yet to occur in the territory, a thorough understanding of the institutions and institutional arrangements set to govern future oil and gas development is a valuable tool for gauging the capacity to integrate these priorities. Therefore, this thesis employs the Institutional Analysis and Development (IAD) framework to analyze the legislation, regulations, policies, and institutions …

The Battle Over Our Land: Urbanization Versus Farmland Preservation In The Greater Golden Horseshoe, Kali Mikulica

Theses and Dissertations (Comprehensive)

Urban sprawl continues to advance further and further into the countryside, as individuals trade cramped urban spaces for much larger rural lots and longer commutes to work. This increased sprawl permanently converts productive agricultural land to urban uses, especially in regions surrounding rapidly expanding cities. It is for this reason that farmland preservation has become a significant issue for policy officials in recent decades. According to the literature, there are numerous methods of protecting prime agricultural land in the face of urbanization; however there are few studies that focus on how these different policy techniques affect farmers. The Ontario government …

Spatial Relationships Of Carbon Dioxide Exchange In An Upland Forested Wetland Complex In The Western Boreal Plain, Alberta, Canada, Danielle M. Solondz

Theses and Dissertations (Comprehensive)

This study examined the midday (10:00 - 16:00) growing season (April - October) surface cover CO₂ relationships with different canopy closures and microtopography (lawn and depression) in a forested upland - peatland - pond complex in the Western Boreal Plain, north - central Alberta, Canada. A dynamic - closed chamber technique was used to: evaluate the relative contributions of heterotrophic and autotrophic respiration and photosynthesis and assess the relative roles of substrate, plant communities, hydrology, and microclimates on CO₂ exchange.

Large differences were observed among the forest floors of landscape units with different canopy covers with respect to …

Evapotranspirative Controls In A Low Arctic Tundra Environment, Daring Lake, Nwt, Canada, Shawn Lecompte

Theses and Dissertations (Comprehensive)

Determining the extent to which changes in vegetation assemblages influence evapotranspiration in the Arctic could potentially contribute to a more realistic estimation of evaporation in a warming climate.

This project aims to determine whether variations in PET and AET rates measured at six tundra vegetation communities can be attributed to the differing vegetation. This will provide a more realistic estimate of change in the water and energy cycles, as well as evaporative processes for a warmer future, caused by enhanced global warming. Predictions of temperature and precipitation regarding future climate in Canada’s Western low Arctic vary greatly. The majority of …

A Comparison Of The Perceptions Of Risk And Health Between Old Order Mennonites And Mainstream Society In The Grand River Valley: A Cross-Cultural Analysis, Ewa Dabrowska-Miciula

Theses and Dissertations (Comprehensive)

The role of culture in the geography of health and technological hazard perception research is an important and relatively recent avenue of research. This dissertation contributes to this research by exploring cross-cultural differences in health and risk perceptions and by examining the relationship between health and place. It involves an in-depth examination of perceptions and meaning of health, as they exist in the local context. It is the first geographical research conducted with individual members of the Old Order Mennonite community considering perceptions of health, technological hazard and understandings of environmental risk.

The studied communities are situated at an agricultural/industrial …

Lightning Signature Assessment To Forecast Tornado Formation, Mary Snow, Richard Snow, Nicole Kufa

Publications

Recent research suggests that a maximum rate of lightning strikes occurs at least 15 to 20 minutes prior to tornado formation within a supercell storm. These maxima are associated with strengthening updrafts as they appear in radar measurements. An increase in lightning rates correlates with an increase of shear in the lower part of the storm. In combination with a strong updraft or downdraft, this shear can provide the ingredients for rotation and possibly a tornado. Polarity reversal of lightning around the time of tornado touchdown also has been examined. Thus, increasing lightning flash rates and reversal of lightning strike …

Tree Species Identification In An Urban Environment Using A Data Fusion Approach, Matthew A. Voss

Dissertations and Theses @ UNI

This thesis explores a data fusion approach combining hyperspectral, LiDAR, and multispectral data to classify tree species in an urban environment. The study area is the campus of the University of Northern Iowa.

In order to use the data fusion approach, a wide variety of data was incorporated into the classification. These data include: a four-band Quickbird image from April 2003 with 0.6m spatial resolution, a 24-band AISA hyperspectral image from July 2004 with 2m spatial resolution, a 63-band AISA Eagle hyperspectral image from October 2006 with lm spatial resolution, a high resolution, multiple return LiDAR data set from April …