Tarim River: Lifeline of Southern Xinjiang and Lessons in Watershed Governance

1. Introduction: The Ecological Code of a River

In the northern part of the Tarim Basin in the Xinjiang Uygur Autonomous Region, a winding river flows from west to east along the northern edge of the vast Taklamakan Desert. This is the Tarim River. As China’s longest inland river, it surges forward like an “unbridled horse,” nurturing numerous oases in southern Xinjiang and earning its title as the region’s true “mother river.” Understanding the Tarim River means more than describing the physical form of a single river; it is a systematic inquiry into water cycles in arid zones, ecological balance, and the interplay between human activity and natural systems.

2. Geographic Setting and Basin Overview

The Tarim River lies along the northern margin of the Tarim Basin in southern Xinjiang. It originates in the Tianshan Mountains and the Karakoram Range, flows east along the northern edge of the Taklamakan Desert, passes through the southern parts of Aksu, Xayar, Kuqa, Luntai, Korla, and Yuli counties and cities, and finally empties into Taitema Lake. The basin covers approximately 1.02 million square kilometers, and the main stem is about 2,179 kilometers long (other sources cite 2,327 kilometers; measured from its longest tributary, the Hotan River, the total length can reach 2,376 kilometers), making it the world’s fifth-largest inland river.

In hydrological terms, the main stem of the Tarim River begins near Xiaojake in Awat County, formed by the confluence of four major tributaries: the Hotan River, the Yarkant River, the Kashgar River, and the Aksu River. The Qing dynasty text Heyuan Jilue recorded this confluence as “four waters interweaving, shaped like a cattle pen,” a vivid description of the confluence phenomenon. The tributaries differ markedly in length and flow contribution: the Hotan River is 1,127 kilometers long, the Yarkant River about 1,078 kilometers (some sources record 1,179 kilometers), and the Kashgar River 555 kilometers, while the Aksu River provides the main runoff supply. Two distinct area figures must be distinguished: the drainage area of the main stem section is about 18,000 square kilometers, whereas the total basin area reaches 1.02 million square kilometers. This sharp disparity is typical of inland rivers, where sources are scattered and confluence is difficult.

3. Origins of the Name and Cultural Significance

The history of the Tarim River can be traced back to the 6th century AD, when historical records referred to it as “Jishi Shui,” a name that persisted into the early Tang dynasty. Shuijing Zhu (Commentary on the Water Classic) called it the “South River,” while Xiyu Tuzhi recorded it as “Erseguole,” meaning “spreading water” in Mongolian. Later variants such as “Jishu Shui” and “Jishou Shui” reflect how different periods and ethnic groups understood and named the river.

The exact meaning of “Tarim” has long been debated. In Uyghur, it is interpreted both as “unbridled horse,” describing a river that frequently changes course and runs like a wild horse, and as “field” or “farming,” referring to riverside residents who make their living by cultivation. Xu Song of the Qing dynasty stated explicitly in Xiyu Shuidao Ji: “In the Hui language, cultivable land is called Tarim, meaning those who live by the river make farming their livelihood.” The 11th-century Uyghur scholar Mahmud al-Kashgari, in his Dīwān Lughāt al-Turk, glossed “tarrm” as a Turkic word meaning “a tributary of river water that flows into a lake or desert.” These interpretations reveal, from different angles, the close bond between the river and human survival—it is both a source that bestows life and a wild force difficult to tame.

4. Channel Changes and Ecological Evolution

The hydrological history of the Tarim River is essentially a microcosm of human–nature interaction in arid zones. Historically, the main stem once flowed into Lop Nur, but as river flow declined and the channel shifted frequently, its terminus gradually retreated westward. Before 1972, the tailwater could still reach Taitema Lake north of Ruoqiang County; afterward, the terminus retreated further to the Daxihaizi Reservoir at Tieganlike, causing large-scale degradation of populus euphratica forests downstream, falling groundwater levels, and an escalating ecological crisis.

In the 21st century, a basin-wide governance program was launched. Through ecological water releases, channel regulation, and unified water scheduling, flow reached Taitema Lake once again, and downstream ecosystems began to recover. This shift reflects a paradigm change from “single-point treatment” to “systematic governance” and offers a valuable reference case for water resource management in inland river basins across the world’s arid regions.

On June 9, 2026, the Tarim River experienced its first flood of the year, officially entering the flood season. This event reminds us that even in arid regions, the frequency and intensity of extreme hydrological events are changing, and balancing flood control with ecological water replenishment remains a long-term challenge for basin managers.

5. Core Challenges in Watershed Governance

5.1 Spatiotemporal Conflicts in Water Allocation

Water resources in the Tarim River Basin come mainly from high-mountain glacier meltwater and precipitation, with pronounced seasonal fluctuations. Spring and summer snowmelt floods contrast sharply with the autumn and winter dry season, and agricultural irrigation demand is misaligned with peak natural runoff, intensifying supply–demand conflicts. Achieving “peak shaving and valley filling” through engineering storage and institutional design is key to improving water use efficiency.

5.2 The Trade-off Between Ecological and Productive Water Use

Oasis agriculture is the economic mainstay of southern Xinjiang, but excessive water diversion directly threatens the survival of downstream ecosystems. The degradation of desert vegetation such as populus euphratica forests and tamarisk shrublands weakens windbreak and sand-fixation functions and may trigger a vicious cycle of desertification. Establishing a scientific and reasonable mechanism for guaranteeing ecological water use and defining ecological red lines are foundational tasks for maintaining basin health.

5.3 Dual Pressure of Flood Control and Drought Relief

Because of high sediment loads and severe riverbed siltation, some reaches of the Tarim River have become “perched rivers,” limiting flood conveyance capacity. At the same time, accelerated glacier melt under global warming may increase runoff in the short term but will sharply reduce glacier reserves over the long term, threatening sustainable water supply. This “increase-then-decrease” trajectory requires governance strategies that are forward-looking and adaptable.

6. Technical Support and Governance Pathways

To address these challenges, modern basin management increasingly relies on integrated technical approaches. Remote sensing and geographic information systems (GIS) are widely used for water resource monitoring, vegetation cover assessment, and tracking river and lake changes. Hydrological models can simulate runoff processes and provide a scientific basis for water scheduling plans. Smart irrigation technologies help improve field-level water use efficiency and reduce ineffective evaporation and seepage.

Beyond engineering measures, institutional innovation is equally indispensable. Unified basin-wide water resource management, ecological compensation mechanisms, and water-saving industrial structures are all proven pathways. The experience of the Tarim River Basin shows that sustainable development in inland river basins must balance ecological protection, economic development, and social stability, adopting a combined strategy of “engineering + management + technology + policy.”

7. Conclusion: The Future of the Mother River

The Tarim River is more than a river in the geographic sense; it is an encyclopedia recording the evolution of civilization, ecological change, and governance wisdom in arid zones. From “unbridled horse” to systematic governance, every shift and return of this river signals a profound adjustment in the relationship between humans and nature. Looking ahead, deepening basin scientific research, improving coordinated governance mechanisms, and raising public awareness of water conservation will be the fundamental path to protecting this river of life. The governance practices of the Tarim River will undoubtedly contribute more Chinese wisdom to ecological restoration and water resource management in inland river basins worldwide.