Central Asia

Study Region: Three major irrigation oases in Uzbekistan (Bukhara, Samarkand and Kashkadarya) Study focus: The study employs remote sensing to develop enhanced methodologies for quantifying water use in Central Asian irrigation oases from 2017 to 2022. By integrating earth observation data into a water balance approach, we quantify variables that are typically challenging to measure, such as groundwater overdraft and non-growing season water use for soil preparation. A key aspect of agricultural water management in the region is utilizing water from reservoirs. Here we introduce a novel approach that combines optical remote sensing with satellite laser altimetry to monitor the availability and use of active water storage in reservoirs. New hydrological insights for the region: Results indicate that water from reservoir storage satisfies up to 14.9 % 2.2 % of the annual demand, but another 11.5 % 5.2 % are groundwater withdrawals. Our analysis indicates a necessary average annual reduction in groundwater extractions by at least 8.0 % 1.6 % for sustainability. Additionally, highly energy-intensive water pumping from Amu Darya River provides more than half of the water resources used in Bukhara and Kashkadarya, resulting in a significant carbon footprint of the region’s agricultural production. The detailed breakdown of water uses and irrigation water consumption by crop type informs efficient, sustainable water management, offering new opportunities for agricultural water accounting in Central Asian irrigation oases.

Central Asia faces substantial water scarcity due to increasing water demand driven by rapid urbanization, population growth, economic development, and inefficiency of irrigated agriculture. These developments are compounded by the effects of climate change, such as rising temperatures, loss of glacier mass and increased frequency of extreme events, including droughts. The region’s escalating water scarcity is causing disputes and straining rural livelihoods. Moreover, these challenges drive migration, creating considerable societal impacts. However, these issues remain underexplored in climate change research, making the region a global blind spot in climate adaptation and migration studies. We advocate for innovative research pathways that scrutinize smallholder adaptation strategies, examine the nexus between climate change, water scarcity, and mobility, and investigate tensions and cooperation over water resources. We conclude by emphasizing that substantial investments in inter- and transdisciplinary collaboration, improved data availability and quality, and strengthening of research and institutional capacities are essential to advance interdisciplinary climate impact research in Central Asia. Such efforts are vital for addressing existing knowledge gaps and enhancing evidence-based policymaking to improve the region’s position in current and future debates on climate change and sustainable development.

In today’s intrinsically connected world, the Water–Food–Energy–Climate Nexus (WFEC Nexus) concept provides a starting point for informed and transparent decision-making based on the trade-offs and synergies between different sectors, including aquatic ecosystems, food security, energy production, and climate neutrality. The WFEC Nexus approach is particularly applicable in regions requiring transboundary water management, such as Central Asia. Unfortunately, this region with unevenly distributed water resources—consisting of Kazakhstan, Kyrgyzstan, Tajikistan, Turkmenistan, and Uzbekistan—is characterized by data scarcity, which limits informed decision-making. However, open-source geodata is becoming increasingly available. This paper aims to fill Central Asia’s WFEC Nexus data gap by providing an overview of key data. We collected geodata through an integrated survey of stakeholders and researchers, stakeholder consultation, and literature screening. Sixty unique datasets were identified, belonging to one of six thematic categories: (1) climate, (2) hydrology, (3) geography and topography, (4) geomorphology, (5) ecology, and (6) anthropogenic uses. For each dataset, a succinct description, including a link to the online source, is provided. We also provide possible applications of using the presented datasets, demonstrating how they can assist in conducting various studies linked to the WFEC Nexus in Central Asia and worldwide.

Central Asia section of Global food policy report highlights regional developments, climate change and its impact on food systems in terms of water use in the region. Moreover, provides options for crop diversification to mitigate malnutrition and role of water saving technologies for adapting climate change impacts.