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6 publications written by Derrien, Monika

Homelessness and Nature Across Landscapes and Disciplines: A Literature Review

2025 / Unhoused populations

The complex social-ecological dynamics of homelessness in natural resource management have become increasingly apparent in recent years. Systematically understanding and engaging with these dynamics across sectors, disciplines, and landscapes has presented a conceptual and methodological challenge for both practitioners and researchers. Though some interdisciplinary research has expanded in recent years, the understanding it has fostered largely remains fragmented across disciplines, and its implications for practice are poorly understood. To help create connections across this fragmented dialogue, we reviewed 111 relevant academic journal articles, books, and reports across a broad range of disciplines. Across this literature, we observed an increasing focus on understanding homelessness drivers, impacts, and solutions through a coupled social-ecological systems lens, though key gaps remain. Research oriented towards urban studies, environmental justice, public health, political ecology, and Indigenous studies offered especially important methodological and conceptual innovations that promise to better confront and address justice in fluid, dynamic, and integrated social-ecological systems. We discuss opportunities for studies to better incorporate community concerns, attend to heterogenous homeless populations, apply multiple scales of analysis across disciplines, address market forces, incorporate diverse worldviews and researcher reflexivity, and address complex social-ecological challenges like climate change. To help mobilize around these needs and opportunities, we encourage researchers, practitioners, and people with lived experiences of homelessness to co-produce a research agenda, a process which could establish a shared foundation for increased collaboration across sectors and disciplines and identify priorities for better understanding and attending to the complex and contested challenges of homelessness across landscapes.

Navigating Constraints and Strategies for Veteran Outdoor Access

2026 / Veterans

Outdoor programs for veterans (OPVs) support the physical and mental health benefits of nature-based experiences, seeking to mitigate the constraints to participation that veterans commonly face. But OPVs themselves often face organizational constraints to service delivery. The COMPACT Act of 2020 required the U.S. Department of Veterans Affairs (VA) to establish an interagency task force to coordinate with public land agencies to enhance outdoor opportunities for veterans. A federal information request in 2022 asked veteran organizations and the public to identify constraints they experience seeking or facilitating outdoor opportunities as well as strategies for overcoming them. We analyzed public comments (n = 120) received in response to the information request. In their service delivery, we found that OPVs faced internal organizational constraints as well as administrative hurdles with both the VA and public land agencies. We described strategies identified by OPVs for negotiating these constraints. OPVs supported capacity-building initiatives to improve coordination, expand access to information, provide training, and identify mechanisms to support OPV programs. They also sought streamlined services to access VA grants and public land reservation and permit systems. Such improvements could reduce constraints to participation and promote improved veteran health.

Public Nature and Health for Homeless Populations: Professionals’ Perceptions of Contingent Human Benefits and Harms

2024 / Unhoused populations

Table 1. Characteristics of the overall homeless and unsheltered homeless population in Washington (statewide), and King and Snohomish counties (US Census, 2020; US HUD, 2022a; 2022b). Professionals observe benefits and harms of natural area use for homeless populations. Perceived harms include increased environmental exposures and social vulnerability. Perceived benefits include privacy, desired social conditions, and reduced stress. Relationships between nature and health were seen as variable and context dependent. This article investigates relationships between public nature and health for unsheltered homeless populations. It examines perceptions of health benefits and harms for people living in public natural areas including local, state, and national forests and parks in the Seattle metropolitan area (USA). Interviews with environmental, social service, and law enforcement professionals who regularly interact with this vulnerable population were conducted and thematically analyzed to understand perceptions of physical and mental health outcomes. Results show professionals’ perspectives on the health benefits and detriments of time spent in natural environments and the contextual factors perceived to influence health. Interviewees’ observations about the variability of personal circumstances and biophysical, social, and weather conditions encourage the nuanced consideration of how contingent therapeutic landscapes provide deeply needed benefits, but for a population with a diminished capacity to adapt when conditions change. We conclude with insights for future research that directly assesses homeless populations’ exposures and health outcomes of living in public natural areas.

A Text-Messaging Chatbot to Support Outdoor Recreation Monitoring Through Community Science

2023 / Community science, Recreation

Figure 1. Volunteer participation rates at sites grouped by parking lot size (small, medium, and large). Participation rates were statistically significantly higher at sites with small parking lots (a) compared to medium and large lots (b). There was no significant difference in participation rates between sites with large- and medium-sized parking lots (b). Public land managers depend on reliable and readily available data about outdoor recreation in parks and greenspaces. However, traditional recreation monitoring techniques including visitor surveying and counting cannot be implemented over large spatial and temporal scales, especially in remote and undeveloped settings where monitoring is costly. To fill these data gaps, and thereby inform decision-making, this study develops and tests the efficacy of a novel recreation monitoring technique that engages visitors in data collection using a chatbot and text-messages. Drawing on knowledge and methods from community science and crowdsourcing, we present a relatively low-cost and low-barrier approach to counting and characterizing recreational visits on public lands. In an 18-month pilot implementation on a national forest in Washington, USA, we found that crowdsourced data collected using the chatbot were consistent with results of controlled counts and in-person surveys. Furthermore, some sites received relatively high participation rates, up to 12% of recreating parties, regardless of cellular connectivity at the site. This study, which is the first to engage public land users in community science using a text-messaging chatbot for the purposes of studying outdoor recreation, demonstrates the potential for technology to support new community science approaches that involve visitors in land stewardship and the development of recreation monitoring systems.

Unsheltered Homelessness in Public Natural Areas Across an Urban-to-Wildland System: Institutional Perspectives

2023 / Green spaces, Unhoused populations, Urban

Figure 1. Conceptual relationships and interactions among social and ecological subsystems related to unsheltered homelessness in public natural areas. This article conceptualizes homelessness on public lands within a social-ecological systems framework, exploring dynamics in public natural areas in the Seattle metropolitan area (USA), a system with a compact urban-to-wildland gradient. While prior research has studied the dynamics of unsheltered homelessness within particular parks or cities—often in areas where camping is prohibited—our interview-based study makes integrated considerations of these dynamics across a range of jurisdictions. We present a thematic analysis that examines professionally diverse perspectives on the dynamics, stressors, and outcomes of public natural area usage by unsheltered individuals. We found a generally uncoordinated system in continual motion, in which considerable resources were expended for short-term, site-specific solutions that yielded system-wide detrimental outcomes perceived for unsheltered individuals, social service and environmental institutions, and ecosystem health. We discuss how improved institutional coordination and mutual understanding about intersecting governance systems could sustain better public land, public health, and social outcomes.

Where Wilderness is Found: Evidence From 70,000 Trip Reports

2023 / Health and well-being, Public land, Recreation, Social media

Figure 1. The study area, showing the boundaries of the Mt. Baker-Snoqualmie National Forest, wilderness areas within it and the trailheads for the 470 hikes in the Washington Trails Association hiking guide that we included in the sample. Map created with the R programming language using the sf, ggspatial and cowplot packages (Dunnington, 2022; Pebesma & Bivand, 2023; R Core Team, 2022; Wilke, 2019). Data from USDA Forest Service, Washington Trails Association, Washington Department of Transportation, Environmental Systems Research Institute map service and Natural Earth, facilitated by the basemaps and rnaturalearth packages for R (ESRI, 2009; Massicotte & South, 2023; Schwalb-Willmann, 2022; USDA Forest Service, 2019; WSDOT, 2023; WTA, 2023c). 1. Outdoor recreation is an essential way many people engage with nature. The provision of public spaces for recreation intersects with conservation practices motivated by intertwined social and ecological values, such as strict practices associated with the concept of ‘wilderness’. Debates persist about how such concepts and management practices influence people’s recreation experiences. 2. Many US public land management agencies facilitate opportunities for outdoor recreation, relying on management frameworks and tools intended to foster specific experiential qualities. But these frameworks and tools assume simplistic relationships between settings and people’s experiences, and managers rarely assess these relationships. 3. This study uses a data set of nearly 70,000 crowdsourced trip reports from a hiking website to understand the qualities of visitors’ experiences on trails. We study the geographic distribution of experiential qualities commonly associated with US wilderness areas: aesthetics, awe, challenge, pristineness, quietness, solitude and timelessness. Using analytical methods that rely on machine learning and natural language processing, we identify these experiential qualities in trip reports from hundreds of routes, and use generalized linear models to analyse relationships between the frequency of each experiential quality and the route’s administrative, built, biophysical, geographic and social settings. 4. We find that four of the seven experiential qualities (aesthetics, awe, challenge and solitude) are commonly described in trip reports, each appearing in 15%–55% of manually coded reports. The extent to which setting characteristics explained variability in experiences differed, ranging from 34% of the variability in the proportion of trip reports describing aesthetics to 55% for awe. The setting characteristics associated with each experiential quality also differed, with characteristics such as trail mileage and summit destinations having stronger influences on experiential qualities than characteristics such as wilderness designation. 5. Synthesis and applications. Our findings suggest the need to consider more diverse variables in experience–setting relationships, develop more robust models to characterize those relationships and create new data sources to represent understudied variables. These advances would help empirically inform and improve frameworks and tools used for recreation and wilderness planning and monitoring, and potentially promote more responsive management to evolving social– ecological values.