Beth Tellman

• Geography
• PostDoc Position at Columbia University

Geospatial analyses of human-environment interactions are challenged by the multi-scale, multi-dimensional nature of human-environment systems. Research in such contexts must often rely on integrating multiple, independently produced data sources, which presents heterogenous data qualities and interoperability challenges. Understanding data quality...

Remote sensing is a method little used by political geographers. Such reluctance is partly because the scientific technique employs positivist methods. Political geographers have critiqued these since the critical turn, when the field began to reflexively question its own theories and methods. Yet, remotely sensed data offers a novel way of examini...

In Mexico City, one of the world's largest megacities, the dissemination of rainwater harvesting (RWH) facilities has been supported by the local government to address the capital's entrenched problems of unequal water access and distribution. In this context, the present chapter analyses the scaling-up journey of this alternative, focusing on the...

Effective monitoring of global water resources is increasingly critical due to climate change and population growth. Advancements in remote sensing technology, specifically in spatial, spectral, and temporal resolutions, are revolutionizing water resource monitoring, leading to more frequent and high-quality surface water extent maps using various...

We assess how much of Central America is likely to be agriculturally suitable for cultivating coca (Erythroxylum spp), the main ingredient in cocaine. Since 2017, organized criminal groups (not smallholders) have been establishing coca plantations in Central America for cocaine production. This has broken South America’s long monopoly on coca leaf...

Rapid and accurate maps of floods across large domains, with high temporal resolution capturing event peaks, have applications for flood forecasting and resilience, damage assessment, and parametric insurance. Satellite imagery produces incomplete observations spatially and temporally, and hydrodynamic models require tradeoffs between computational...

To shed light on the politics of remote sensing, a technique often regarded as objective and neutral, the subfield of critical remote sensing has emerged in the social sciences. This perspective translates its key ideas into an actionable framework that offers suggestions for how to transform remote sensing to better engage and empower people and p...

Rapid and accurate maps of floods across large domains, with high temporal resolution capturing event peaks, have applications for flood forecasting and resilience, damage assessment, and parametric insurance. Satellite imagery produces incomplete observations spatially and temporally, and hydrodynamic models require tradeoffs between computational...

Floods impact communities worldwide, resulting in loss of life, damaged infrastructure and natural assets, and threatened livelihoods. Climate change and urban development in flood‐prone areas will continue to worsen flood‐related losses, increasing the urgency for effective tools to monitor recovery. Many Earth Observation (EO) applications exist...

Better data and assessment metrics—and improved researcher involvement in communities—are needed to understand and redress inequitable vulnerabilities to and recoveries from flooding.

Effective monitoring of global water resources is increasingly critical due to climate change and population growth. Advancements in remote sensing technology, especially in spatial, spectral, and temporal resolutions, have revolutionized water resource monitoring, leading to more frequent and high-quality surface water extent maps using various te...

Floods impact communities worldwide, resulting in an estimated $651 billion (USD) in damages, countless fatalities, and threatened livelihoods over the last two decades alone. Climate change and urban development in flood-prone areas will continue to worsen flood-related losses increasing the urgency for effective tools to monitor recovery. Many Ea...

Plain Language Summary Earth observation (EO) data are used to understand the social, environmental, and climatic causes and consequences of changes to the Earth. Greater diversity in EO data sources and access points, the evolution of web‐based and collaborative platforms for analysis and communication, and the growth of the global user community...

Mapping floods using satellite data is crucial for managing and mitigating flood risks. Satellite imagery enables rapid and accurate analysis of large areas, providing critical information for emergency response and disaster management. Historical flood data derived from satellite imagery can inform long-term planning, risk management strategies, a...

Illicit cattle ranching and coca farming have serious negative consequences on the Colombian Amazon’s land systems. The underlying causes of these land activities include historical processes of colonization, armed conflict, and narco-trafficking. We aim to examine how illicit cattle ranching and coca farming are driving forest cover change over th...

Mapping and monitoring global surface water is crucial for natural resource management. Additionally, the ability to accurately map surface water benefits disaster response during and after flood events. Recent growth in satellite data availability along with the capacity to computationally manage large volumes of data has facilitated a rapid incre...

An analysis of floods or droughts that hit the same place twice shows that using risk management alone does not reduce the effect of extreme events. Addressing the social drivers of hazard impact, equitably, is essential. Repeated disasters reveal exposure inequity.

Informal urban land expansion is produced through a diversity of social and political transactions, yet ‘pixelizable’ data capturing these transactions is commonly unavailable. Understanding informal urbanization entails differentiating spatial patterns of informal settlement from formal growth, associating such patterns with the social transaction...

Illicit supply networks (ISNs) are composed of coordinated human actors that source, transit, and distribute illicitly traded goods to consumers, while also creating widespread social and environmental harms. Despite growing documentation of ISNs and their impacts, efforts to understand and disrupt ISNs remain insufficient due to the persistent lac...

On frontiers dominated by illicit activities such as narcotrafficking, criminal organizations’ usurpation of land and resources is profoundly changing rural livelihoods and prospects for biodiversity conservation. Prior work has demonstrated how drug trafficking catalyzes forest loss and smallholder dispossession but does not make clear the extent...

Flooding affects more people than any other environmental hazard and hinders sustainable development1,2. Investing in flood adaptation strategies may reduce the loss of life and livelihood caused by floods³. Where and how floods occur and who is exposed are changing as a result of rapid urbanization⁴, flood mitigation infrastructure⁵ and increasing...

A global historical geodatabase of flood‐event extents is key to providing accurate exposure information in vulnerable areas that cannot afford traditional flooding models. Decades of Earth observing satellites and cloud computing make it possible to run water detection algorithms back in time to capture the spatial extent of floods globally. Cloud...

Central America exemplifies a dynamic unfolding around the world where transnational illicit economies are driving land use change. Despite an extensive network of protected areas, Central America has one of the highest deforestation rates in the world in the past 20 years. Some of this forest loss is due to the international cocaine trade, as drug...

Informal urban expansion, or conversion of land to urban land uses, outpaces formal urbanization in the developing world. Understanding why this informality exists and persists is essential to counteract characterizations that it is chaotic and ungovernable. This research examines who shapes the informal arrangements developed to meet unmet housing...

In November 2017, floods in Impfondo, Congo forced evacuations and damaged crops, homes, and roads. The World Food Programme (WFP) supported the government’s response by providing food aid but was delayed by one month due to inadequate information. To enable faster flood response, WFP partnered with Cloud to Street to develop a near real-time Congo...

Global flood models (GFMs) and earth observation (EO) play a crucial role in characterising flooding, especially in data-sparse, under-resourced regions of the world. However, validation studies are often limited to a handful of historic events and do not directly assess the ability of these products to simulate flood hazard—the probability that fl...

Accurate flood detection in near real time via high resolution, high latency satellite imagery is essential to prevent loss of lives by providing quick and actionable information. Instruments and sensors useful for flood detection are only available in low resolution, low latency satellites with region re-visit periods of up to 16 days, making floo...

Flooding affects more people than any other environmental hazard and hinders sustainable development1–3. Investing in flood adaptation can reduce loss of life and livelihoods 4,5. However, where and how floods occur, and who is exposed, is changing due to rapid urbanization 6, new flood mitigation infrastructure 7,8, and increasing human settlement...

Social vulnerability indicators seek to identify populations susceptible to hazards based on aggregated sociodemographic data. Vulnerability indices are rarely validated with disaster outcome data at broad spatial scales, making it difficult to develop effective national scale strategies to mitigate loss for vulnerable populations. This paper valid...

Social vulnerability indicators seek to identify populations susceptible to hazards based on aggregated sociodemographic data. Vulnerability indices are rarely validated with disaster outcome data at broad spatial scales, making it difficult to develop effective national scale strategies to mitigate loss for vulnerable populations. This paper valid...

This research is motivated by the compelling finding that the illicit cocaine trade is responsible for extensive patterns of deforestation in Central America. This pattern is most pronounced in the region's large protected areas. We wanted to know how cocaine trafficking affects conservation governance in Central America's protected areas, and whet...

Illegal activity, such as deforestation for illicit crops for cocaine production, has been inferred as a cause of land change. Nonetheless, illicit activity is often overlooked or difficult to incorporate into causal inference models of land change. Evidence continues to build that narcotrafficking plays an important, yet often unreported, role in...

Anthropogenic land use has irrevocably transformed the natural systems on which humankind relies. Advances in remote sensing have led to an improved understanding of where, why and how social and economic processes drive globally important land-use changes, from deforestation to urbanization. The role of illicit activities, however, is often absent...

In 1998, the National Research Council published People and Pixels: Linking Remote Sensing and Social Science. The volume focused on emerging research linking changes in human populations and land use/land cover to shed light on issues of sustainability, human livelihoods, and conservation, and led to practical innovations in agricultural planning,...

Counterdrug interdiction efforts designed to seize or disrupt cocaine shipments between South American source zones and US markets remain a core US “supply side” drug policy and national security strategy. However, despite a long history of US-led interdiction efforts in the Western Hemisphere, cocaine movements to the United States through Central...

Flood Risk Workshop; Boulder, Colorado, 1–3 October 2018

Governments, development banks, corporations, and nonprofits are increasingly considering the potential contribution of watershed conservation activities to secure clean water for cities and to reduce flood risk. These organizations, however, often lack decision-relevant, initial screening information across multiple cities to identify which specif...

In Central America, drug traffickers are deforesting the region's remaining forests and protected areas through a process known as narco‐ganadería , narco‐cattle ranching. Drawing on the case study of Laguna del Tigre National Park, this article argues that narco‐cattle ranching is a key driver of deforestation in Guatemala's Maya Biosphere Reserve...

Megacities are socio-ecological systems (SES) that encompass complex interactions between residents, institutions, and natural resource management. These interactions are exacerbated by climate change as resources such as water become scarce or hazardous through drought and flooding. In order to develop pathways for improved sustainability, the dis...

Infrastructure development is central to the processes that abate and produce vulnerabilities in cities. Urban actors, especially those with power and authority, perceive and interpret vulnerability and decide when and how to adapt. When city managers use infrastructure to reduce urban risk in the complex, interconnected city system, new fragilitie...

Reliable representations of global urban extent remain limited, hindering scientific progress across a range of disciplines that study functionality of sustainable cities. We present an efficient and low-cost machine-learning approach for pixel-based image classification of built-up areas at a large geographic scale using Landsat data. Our methodol...

While environmental and social threats to society changes faster than in recent centuries, there is more of a need for faster, globally scalable and locally relevant risk information from developing Banks and the countries they serve. Big Data can range from gigabytes (call details records), to terabytes (satellite data), to petabytes (web traffic)...

Diversity among scientists can foster better science (1, 2), yet engaging and retaining a diversity of students and researchers in science has been difficult (3). Actions that promote diversity are well defined (4), organizations are increasingly focused on diversity (5), and many institutions are developing initiatives to recruit and enroll studen...

Watersheds are under increasing pressure worldwide, as expanding human activities coupled with global climate change threaten the water security of people downstream. In response, some communities have initiated investments in watershed services (IWS), a general term for policy-finance mechanisms that mitigate diverse watershed threats and promote...

Watersheds are under increasing pressure worldwide, as expanding human activities coupled with global climate change threaten the water security of people downstream. In response, some communities have initiated investments in watershed services (IWS), a general term for policy-finance mechanisms that mitigate diverse watershed threats and promote...

A growing body of evidence suggests that criminal activities associated with drug trafficking networks are a progressively important driver of forest loss in Central America. However, the scale at which drug trafficking represents a driver of forest loss is not presently known. We estimated the degree to which narcotics trafficking may contribute t...

Each year thousands of people and millions of dollars in assets are affected by flooding in Senegal; over the next decade, the frequency of such extreme events is expected to increase. However, no publicly available digital flood maps, except for a few aerial photos or post - disaster assessments from UNOSAT, could be found for the country. This re...

Adaptation is typically conceived uniquely in positive terms, however for some populations, investments in risk management can entail significant tradeoffs. Here we discuss the burden for households of coping with, and adapting to, adverse water conditions in economically marginal areas of Mexico City. We argue that households’ efforts to adapt in...

he association between increasing water intensive land-cover, such as the use of turf grass and trees, and increasing water use is a growing concern for water-stressed arid cities. Appropriate regulatory measures addressing residential landscaping, such as those applied by Homeowner Associations (HOAs), may serve to reduce municipal water use, join...

Urbanization can decrease the flood mitigation capacity of a catchment, and these impacts can be measured with hydrologic modeling. Models are typically calibrated against observed discharge and satellite data, but in a developing country context like El Salvador, these data are often unavailable. Even if a model is well calibrated and tested, its...

Central America continues to be a violent region and is prone to increasing climatic shocks and environmental degradation. This paper explores the non-linear feedback loop between violence and climate shocks on livelihood resilience in El Salvador and Honduras, two countries experiencing high rates of violence. The nature of this complex feedback l...

Country-scale studies and statistics of deforestation fail to capture the impact of land use on the watershed scale. The discourse of Forest Transition Theory (Mather 1992) to explain patterns of deforestation and reforestation in the tropics inadequately addresses spatial patterns of land use vital to understanding hydrologic ecosystem services. T...

¿Por qué pocos agricultores salvadoreños venden a mercados de "comercio justo"? Este artículo examina varias causas que limitan la participación de pequeños productores de café. Basado en un analisis historica de sociedad y café en el Salvador y de las cadenas de valor con dos estudios caso, uno en la sierra oriental y otro en la región oeste, ilus...

El Salvador is extremely vulnerable to disasters due to many factors, including poverty, deforestation, urbanization, and mass internal migration during the Civil War (1980 – 1992). The low capacity of the national and local governments to address social vulnerability and respond to disasters left El Salvador again exposed to Hurricane Ida in 2009....