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The expansion of irrigated agriculture has increased global crop production but resulted in widespread stress to freshwater resources. Ensuring that increases in irrigated production only occur in places where water is relatively abundant is a key objective of sustainable agriculture, and knowledge of how irrigated land has evolved is important for measuring progress towards water sustainability. Yet a spatially detailed understanding of the evolution of global area equipped for irrigation (AEI) is missing. Here we utilize the latest sub-national irrigation statistics (covering 17298 administrative units) from various official sources to develop a gridded (5 arc-min resolution) global product of AEI for the years 2000, 2005, 2010, and 2015. We find that AEI increased by 11% from 2000 (297 Mha) to 2015 (330 Mha) with locations of both substantial expansion (e.g., northwest India, northeast China) and decline (e.g., Russia). Combining these outputs with information on green (i.e., rainfall) and blue (i.e., surface and ground) water stress, we also examine to what extent irrigation has expanded unsustainably (i.e., in places already experiencing water stress). We find that more than half (52%) of irrigation expansion has taken place in regions that were already water stressed, with India alone accounting for 36% of global unsustainable expansion. These findings provide new insights into the evolving patterns of global irrigation with important implications for global water sustainability and food security. Recommended citation: Mehta, P., Siebert, S., Kummu, M. et al. Half of twenty-first century global irrigation expansion has been in water-stressed regions. Nat Water (2024). https://doi.org/10.1038/s44221-024-00206-9 Open-access peer reviewed publication available at https://www.nature.com/articles/s44221-024-00206-9 Files G_AEI_*.ASC were produced using the GMIA dataset[https://data.apps.fao.org/catalog/iso/f79213a0-88fd-11da-a88f-000d939bc5d8]. Files MEIER_G_AEI_*.ASC were produced using Meier et al. (2018) dataset [https://doi.pangaea.de/10.1594/PANGAEA.884744].

Metadata only record This website offers several videos that provide in-depth information about different aspects of sustainable agriculture. Below is a list of the videos:

The last few decades have seen an explosion in population growth and along with this growth we have also witnessed an increase in demand for products. Although our resources are limited, consumers' needs know no bounds. It is not surprising that we are also increasingly demanding more from our environment. It is therefore imperative that we make better use of our resources and reassess how we construe a product's lifecycle. Instead of a linear perspective, which typically follows a product's lifecycle from mining of raw materials to manufacturing, but then stops when products are trashed, we need to use a circular perspective, where we focus on the entire lifecycle of products, from not just manufacturing to usage, but also from usage to creation of new products through recycling. The focus of this dissertation is on understanding two important processes in the circular economy: that of usage and disposal. I focus on the role that consumers' product valuations play in these processes. In essay 1, I show that consumers value products made from recycled materials more than comparable regular products. I also document why this happens and demonstrate how this affects usage. In essay 2, I investigate the relationship between reuse and product disposal. The circular economy is based on what is now referred to as the 3R approach: reduce, reuse, and recycle. However, I show that consumers are more (vs. less) likely to trash products that they have used extensively (vs. rarely). This then leads to a conundrum: if we encourage consumers to reuse products extensively, it appears that they are more likely to trash them. It is therefore imperative that we understand this relationship better and find interventions to mitigate this negative relationship. Doctor of Philosophy The last few decades have seen an explosion in population growth and along with this growth we have also witnessed an increase in demand for products. To create a more sustainable world, it is imperative that we move towards a more circular economy, where we not only minimize waste, but also find ways to extract more use from our resources. One way to do this is to find ways to reuse products after they have reached the end of their lifecycle. The focus of this dissertation is on understanding two important processes in the circular economy: that of usage and disposal (essentially addressing questions about what to do with products that we no longer have a need for). I primarily focus on the role that consumers' product valuations play in influencing these processes. In essay 1, I study how consumers feel about products made from recycled materials. I find that consumers are willing to pay more for products made from recycled materials compared with products made from regular raw materials. The higher willingness to pay emerges because consumers value the process that transforms the recycled materials into brand new products. I also show that this valuation impacts use: consumers use products made from recycled materials more judiciously. In essay 2, I investigate the relationship between product usage and disposal. I find that when consumers use a product more extensively, they are more likely to trash the product compared with other forms of reuse, such as, disposing in the recycling bin, giving it to others, or reselling it. This effect emerges because when consumers use a product more frequently, they believe that the product has less value remaining for others, and a product that confers lower value to others should be trashed.

Spanning 14 states in the northeast United States, the Appalachian Trail (AT) is a popular destination for outdoor recreation, with thousands of individuals attempting to thru-hike the AT every year. For its scenic views and accessibility from the cities, the AT is experiencing a record number of visitors raising concerns about the sustainability of the trail. Many trail organizations manage the AT to reduce the visitor impact on the outdoors. In this research, I study the role of information and communication technologies in promoting collaboration between these trail agencies and visitors. I identify the need for a formal communication channel between the stakeholders by examining the existing information-sharing practices of hikers and trail managers through social media analysis, interviews, and a design workshop. I present the design of an online discussion platform, the SmarTrail board, and conduct a field usability study with two AT trail clubs to evaluate the platform. Findings from the study reveal that centralized direct communication and streamlined information can support trail management on the AT by promoting collaboration within the trail community. The research paves the path for future research into the design of ICTs for driving nature conservation goals. Master of Science The Appalachian Trail (AT) in the northeast of the United States spreads across 14 states. It is accessible from many regional urban centers, offering recreational opportunities to thousands of individuals every year. It is also a popular site for thru-hiking, an endeavor to hike the trail from end to end in a year. Such popularity and accessibility to the trail put pressure on the natural resources, raising concerns about the sustainability of the trail. Management of the trail deals with minimizing the resource impact while preserving the trail experiences of the visitors. Thirty trail clubs maintain separate sections of the AT, and a number of trail organizations work together to manage the trail. The core of this management relies on the collaboration of these trail agencies with each other and the visitors. As communication is central to collaborations in everyday life and for the trail, I explore the practices and possibilities for information sharing and communication on the AT. Digital conservation refers to the technological developments that support and forward nature conservation goals. As the pristine environment of the trails and the AT are not barred from the reach of digital technology, the prevalence of smartphones among visitors presents opportunities for information and communication technologies (ICTs) to support the digital conservation of the trail. In this research, I study digital technology use among hikers and trail managers on the AT, particularly for information sharing. By analyzing comments on Reddit, conducting interviews with the AT trail managers, and organizing a workshop with long-distance hikers, I highlight the need for direct communication between these stakeholders. I present the design of an online discussion board called the SmarTrail platform as a formal communication channel between hikers and trail managers and evaluate it with two trail clubs on the AT. The results from the evaluation offer several use cases of mediated communication, highlighting its need and potential in supporting trail management on the AT. Centralized and formal communication can lead to effective trail management by engaging visitors in trail management, improving volunteer management for the clubs, and enabling knowledge sharing and coordination between the trail agencies. With design considerations for improving human-nature interaction and simplifying the available information for visitors and trail management authorities, this study informs the design of ICTs for trail environments that would forward the digital conservation goals on the AT.

Completed as a series of manuscripts, this dissertation reflects four aspects of my research into the intersections of conservation and sustainable development as practiced by conservation land trusts and community landcare groups, as well as by faculty and staff at land grant universities. The first paper included in this dissertation explores "Conservation 2.0" strategies being developed and employed by land trust across the US to integrate social and economic development goals into their conservation missions. The second paper explores one of these Conservation 2.0 strategies in greater detail, in particular the support of ecological entrepreneurship by land trusts and partners they involve in "ecological entrepreneurship support networks". The third piece emerged out of five years of engaged research with Catawba Landcare as one community landcare group in the region. As a means to capture the development path and history of the organization as well as to facilitate its path forward, I developed a dynamic content management system (CMS) based website for the group, which is explained in Chapter 4. The fourth and final piece of this dissertation is a collaboratively written piece that examines the relationship between Catawba Landcare and Virginia Tech using four theoretical lenses for community capacity building, ultimately proposing one engagement strategy for land grant universities to build and strengthen social infrastructure in their neighboring communities. In total, this collection of works chronicles a larger endeavor to explore place-based sustainability and the role of institutions and civil society in constructing a more sustainable future. Ph. D.

Metadata only record This book is a collection of papers presented at a workshop titled 'Listening to the people: social aspects of dryland management,' held in Nairobi, Kenya, 14-18 December 1993. The event was organized by the Desertification Control Programme Activity Centre of UNEP to develop a better understanding of community participation and bottom-up development. A primary goal of the workshop was to formulate recommendations of what needs to be done to achieve sustainable development in the drylands. A prerequisite for the success of any intervention affecting a local community is that the planners recognize the institutions, systems of indigenous knowledge and management structures that already exist. The papers and discussions of the workshop analyse the experiences of over three decades of attempts by governments, donor agencies and non-governmental organizations to promote economic development in the drylands of developing countries. Six sections of the book cover: (1) the social dimensions and concepts of desertification; (2) participatory approaches and methods related to development of the drylands; (3) social aspects of dryland management; (4) indigenous knowledge; (5) gender issues in natural resource management; and (6) the importance of government policies in dryland management. (CAB Abstracts)

Metadata only record The integration of environmental conservation with economic development has historically faced considerable challenges. Convincing poor rural farmers to adopt new technologies requires a high degree of trust, support and accountability between farmers and implementers. Based on the principles of Analog Forestry and Community-based Ecosystem Management, Counterpart International and its partners implement the Forest Garden Programme to provide economically viable and environmentally sound opportunities for raising rural incomes, restoring degraded land, and preserving native biodiversity through community-led management of watersheds, forests and agricultural lands. This study focuses on the participation of Sri Lankan farmers in the programme. Success of the programme, rates of adoption of and withdrawal from the programme, as well as its long-term sustainability are highly dependent on project implementers' ability to reduce risk and make substantial functional linkages between farmers and their fledgling Forest Garden-based enterprises as well as their sustainable use and stewardship of their natural resources. Available in SANREM office, FS

Metadata only record The report/case study discusses the importance of agriculture in the Karatu district, the loss of agricultural productivity from soil and land degradation, how climate change jeopardizes small farmers in the district, and how conservation agriculture (CA) could significantly address problems of agricultural productivity. The study/intervention was focused on five villages in the Karatu district and was intended to strengthen the livelihood and food security of small farmers through protection of ecosystem services that would allow for sustainable crop production intensification. These CA practices and services were implemented through outreach, education and training with small Tanzanian farmers. Involved stakeholders were farmers, government actors, intentional institutions, and non-governmental organizations. As conservation agriculture practices were adopted, scientists examined fluctuations in how farmers generating income and the various concerns that ensued. Critical factors that enable successful intervention were outlined as the following: strong interaction between all stakeholders, problem analysis by local farmers, involvement of facilitators skilled in CA practices, and initial provision of resources needed to implement CA. Factors that discouraged implementation of CA practices were lack of needed resources; lack of CA experts, training, and policy; and lack of involvement of stakeholders. Authors of the report suggested that the district should have an explicit, national policy approach to conservation agriculture; collaboration should be strengthened to align goals and implementation efforts; various approaches to CA should be utilized to maximize participation in CA; resources needed to implement CA s should be reasonably priced and accessible to local farmers. The report concludes that CA efforts should be expanded through stronger linkages with extension officers and national governmental agencies. Also, food processing strategies could be utilized to add value to the increased production gains from CA.

Metadata only record The World Bank's concept of its development mission has deepened in recent years, with greater weight being given to poverty eradication and environmental stewardship. Natural resource management has taken its place alongside agriculture as a major rural development concern. A more integrated picture of rural livelihoods has emerged, along with a growing appreciation of the viability of production systems that make extensive but sustainable use of fragile resources, such as those of pastoralists. This paper looks at the World Bank's involvement in land policy issues in forests and protected areas and in pastoral and rangeland development, and summarises the lessons learned.

Presentation on the effects of forest decentralization reforms in Uganda on both forest sustainability and livelihoods. Presents findings of data gathered using the Poverty and Environment Network method. LTRA-1 (Decentralization Reforms and Property Rights)