The participation of the general public in the research design, data collection and interpretation process together with scientists is often referred to as citizen science. While citizen science itself has existed since the start of scientific practice, developments in sensing technology, data processing and visualisation, and communication of ideas and results, are creating a wide range of new opportunities for public participation in scientific research. This paper reviews the state of citizen science in a hydrological context and explores the potential of citizen science to complement more traditional ways of scientific data collection and knowledge generation for hydrological sciences and water resources management. Although hydrological data collection often involves advanced technology, the advent of robust, cheap and low-maintenance sensing equipment provides unprecedented opportunities for data collection in a citizen science context. These data have a significant potential to create new hydrological knowledge, especially in relation to the characterisation of process heterogeneity, remote regions, and human impacts on the water cycle. However, the nature and quality of data collected in citizen science experiments is potentially very different from those of traditional monitoring networks. This poses challenges in terms of their processing, interpretation, and use, especially with regard to assimilation of traditional knowledge, the quantification of uncertainties, and their role in decision support. It also requires care in designing citizen science projects such that the generated data complement optimally other available knowledge. Lastly, we reflect on the challenges and opportunities in the integration of hydrologically-oriented citizen science in water resources management, the role of scientific knowledge in the decision-making process, and the potential contestation to established community institutions posed by co-generation of new knowledge.

Environmental conservation has developed significantly in China over the past 20 years, including more collaborative approaches and recent advances in establishing a national parks system. This study reviews the development of protected areas in the headwaters of the Yangtze River, drawing lessons from experiences of community development and co-management approaches. Community engagement and participation in developing localized plans for natural resource utilization and conservation have been critical features of successful ventures. Government programs and policies, the emergence of grassroots civil society, and the development of herders’ cooperatives and protected areas, are all tracked, each pointing towards the significant value of inclusive biodiversity conservation approaches for meeting broadly agreed development agendas, such as achieving the Sustainable Development Goals by 2030. Observations from the vast, high, arid, and semi-arid lands of the Tibetan Plateau are then considered in light of China’s Belt and Road Initiative, which is bringing vast financial and technical resources to the world. Special attention is given to applying the lessons that have been learned in China to the mountains of Central Asia, globally recognized as a biodiversity hotspot and a water tower for large downstream populations. Keeping local people at the heart of conservation is deemed fundamentally important.