Аңдатпа
Abstract Water resources play a crucial role in the socio-economic development and ecological stability of Central Asia. The region, situated in the heart of the Eurasian continent, is characterized by a continental climate with uneven distribution of temperature and precipitation. The hydrological network of Central Asia is predominantly formed by transboundary rivers such as the Amu Darya, Syr Darya, Chu, Talas, Ili, Irtysh, and Ural, whose headwaters originate in the mountainous regions of Tajikistan, Kyrgyzstan, Kazakhstan, China, and Russia. These rivers are the primary sources of water supply for all countries in the region, particularly Uzbekistan, Turkmenistan, and Kazakhstan. The hydrological regimes of these rivers and their tributaries are highly influenced by climate change and anthropogenic activities. This chapter examines the current state and trends of water resources in Central Asia, analyzing the hydrological cycle and spatial distribution of river basins. The rivers of the region are classified according to their sources of feeding (glacial, snowmelt, and rainfall), with an assessment of their vulnerability to climate change. Long-term hydrological observations indicate an increase in river discharge in basins with significant glacier melt contributions. Simultaneously, a decline in river flow in the lower reaches is observed, largely attributed to intensive water withdrawal for irrigation and reservoir regulation. The construction of dams and reservoirs since the mid-twentieth century has significantly altered the natural hydrological regime of Central Asian rivers. The development of large reservoirs, including Toktogul, Nurek, Charvak, Bukhtarma, and Kapchagay, has facilitated irrigation expansion and hydropower generation. However, these interventions have also led to profound changes in river flow regimes, ecosystem degradation, and the acceleration of the Aral Sea’s desiccation. Moreover, the conflicting interests of upstream countries (focused on hydropower production) and downstream countries (prioritizing irrigation) have complicated water resource management. To address transboundary water management issues, key agreements such as the Almaty Agreement (1992), the Bishkek Agreement (1998), and the Nukus Declaration (1995) were established. However, ensuring effective cooperation among the region’s countries remains an ongoing challenge. Extreme hydrological events, including floods, mudflows, and droughts, have become more frequent due to climate change and unsustainable land use. Notable recent disasters, such as the 2024 floods in Kazakhstan and the 2021 mudflows in Uzbekistan, highlight the region’s vulnerability to natural hazards. Additionally, the issue of soil salinization, exacerbated by inefficient irrigation practices, poses a significant threat to both water and food security in Central Asia. In conclusion, sustainable water resources management in Central Asia requires enhanced regional cooperation, climate adaptation strategies, and technological advancements in water use efficiency. The future of water security in the region depends on balancing hydropower development, agricultural irrigation, and ecosystem conservation, as well as improving governance mechanisms and strengthening transboundary agreements to prevent conflicts and environmental degradation.