Human-environment interactions in aeolian (windblown) systems has focused research on<br/>human’s role in causing and aiding recovery from natural and anthropogenic disturbance. There<br/>is room for improvement in understanding the best methods and considerations for manual<br/>coastal foredune restoration. Furthermore, the extent to which humans play a role in changing the<br/>shape and surface textures of quartz sand grains is poorly understood. The goal of this thesis is<br/>two-fold: 1) quantify the geomorphic effectiveness of a multi-year manually rebuilt foredune and<br/>2) compare the shapes and microtextures on disturbed and undisturbed quartz sand grains. For<br/>the rebuilt foredune, uncrewed aerial systems (UAS) were used to survey the site, collecting<br/>photos to create digital surface models (DSMs). These DSMs were compared at discrete<br/>moments in time to create a sediment budget. Water levels and cross-shore modeling is also<br/>considered to predict the decadal evolution of the site. In the two years since rebuilding, the<br/>foredune has been stable, but not geomorphically resilient. Modeling shows landward foredune<br/>retreat and beach widening. For the quartz grains, t-testing of shape characteristics showed that<br/>there may be differences in the mean circularity between grains from off-highway vehicle and<br/>non-riding areas. Quartz grains from a variety of coastal and inland dunes were imaged using a<br/>scanning electron microscopy to search for evidence of anthropogenically-induced<br/>microtextures. On grains from Oceano Dunes in California, encouraging textures like parallel<br/>striations, grain fracturing, and linear conchoidal fractures provide exploratory evidence of<br/>anthropogenic microtextures. More focused research is recommended to confirm this exploratory<br/>work.

In 1974, with a relatively young and fast-growing city in front of them, the City Council of Phoenix, Arizona charged the Phoenix Planning Commission with studying potential plans for urban form. Through the help of over 200 citizens over the next eight months, the village concept was born. Characterized by an emphasis on community-level planning, unique neighborhood character, and citizen input, the village concept plan provides an compelling lens into decentralized planning. In 1979, the Village Concept, as part of the “Phoenix Concept Plan 2000,” was officially adopted by the Phoenix City Council and has remained a component of the city’s long-range planning ever since. Each village features a core of dense commercial and residential activity, with a surrounding periphery featuring varied densities and land usage. There were nine original villages outlined in 1979. As of today, there are 15 villages. Each village has a Village Planning Committee (VPC) made up of 15 to 21 citizens, each being appointed to the committee by the Phoenix Mayor and City Council. This exploratory study was born out of an interest in the Village Planning Committees and a desire to understand their function as a mechanism for citizen participation in urban planning and urban governance. Similarly, with the rapid onset of the automobile and freeway expansion in the decades after WWII, once-insolated communities in the Valley have become connected to each other in a way that raises questions about how to maintain neighborhood’s unique character while promoting sustainable growth and expansion of the city. Phoenix’s Urban Village Model attempts to answer those questions. The efficacy of the model can be considered from two perspectives––how does it aid in making land use decisions, and how does it promote citizen participation? While there is an extensive body of literature on neighborhood councils in the United States and plentiful analysis of the merits of such models as participatory mechanisms and devices of urban planning, there is a lack of discussion of Phoenix’s Urban Village Model. This thesis aims to include Phoenix in this growing body of work.

In the Southwestern United States, climate change poses challenges to reliable water access due to droughts, wildfires, and urban development. Arizonan farmers are faced with unpredictable precipitation, muddled legal water rights, and outdated equipment to irrigate their land. Located in Northern Arizona, Verde Valley residents and stakeholders are challenging the way the Verde River water is managed through collaboration, partnerships, and technical changes to water infrastructure. Through interviews conducted with various stakeholders involved in the Verde River ditch irrigation system, ranging from water users to nonprofit organizations, this paper identifies sociotechnical tinkering as an important aspect of maintaining agricultural operations along the river amid political tensions, social relations, and climate change. Through interviews and analysis, this paper further contributes to the relatively new discourse on the concept of sociotechnical tinkering by proving its existence and its subsequent effectiveness in the Verde Valley. Using statements made by respondents, the paper argues that sociotechnical tinkering helps manage resources through political and social relations.