Transformando paisajes: el canal de Qush Tepa y los ecosistemas del norte de Afganistán

El río Amo:
Forming a natural boundary with Afghanistan’s northern neighbors, the Amo River is one of the largest untouched ecosystems along the border. Often referred to as the “Nile of Central Asia,” it supports diverse fish species, draws recreational enthusiasts from across the country, and serves as an important economic resource for local communities. Aral Lake, once the world’s second-largest lake, has largely dried up due to the diversion of Amu River water for irrigation. This event is considered one of the most catastrophic environmental disasters in history.

The Desert Ecosystem:
Positioned between the Amu River and Afghanistan’s northern rangelands, the desert stretches from Jawzjan to Takhar provinces in parallel with the river. Characterized by arid and semi-arid conditions, the Sand Dome Desert is a major source of seasonal sand, dust storms, and strong winds that pose significant environmental and public health risks—risks that have intensified over the past two decades due to climate change. Despite generating 35% of the Amu River’s water, Afghanistan has yet to harness it for irrigation. The Qush Tepa Canal is set to change that by becoming the country’s first project to use Amu River water for agriculture, although design Los desafíos podrían resultar en una pérdida de agua de hasta el 22 % en los primeros 40 kilómetros y potencialmente provocar la salinización del suelo a medida que sube el nivel freático. Además, el propio canal divide el desierto, reduciendo el hábitat disponible y restringiendo el movimiento de las especies.

Ríos alimentados por montañas y límites agrícolas:
Originating from the peaks of the Hindu Kush, Alborz, and Marmal mountains, the Khulam, Balkh, Sari Pul, and Sheren Tagab rivers flow through verdant valleys before merging with the rangelands and semi-desert. Historically, these rivers reached the Amu River prior to the advent of modern irrigation systems and now delineate the boundary between fertile agricultural lands and encroaching desert. Ancient sites along the lower reaches of the Balkh River highlight early civilizations that thrived on these watercourses, once surrounded by lush grasslands now increasingly overtaken by sand dunes—a stark reminder of ongoing desertification. Satellite imagery even reveals these rivers as tree-like roots traversing the landscape, connecting agricultural lands and recreational areas within a two-hour drive from Mazar-e-Sharif.

Paisajes agrícolas y barreras naturales:
Each river watershed has developed its own distinct agricultural landscape. However, natural features such as rangelands and sand dunes create barriers between these zones, rendering the habitats fragile and vulnerable to environmental stresses like extreme heat and draught. Although much of the land between irrigated fields remains moderately suitable for cultivation, rainfed agricultural zones—especially those at the end of irrigation canals—are prone to water shortages during droughts and contribute to airborne fine particles during windy seasons, further impacting air quality.

Los humedales como sistemas multifuncionales:
Maps of the region reveal scattered wetlands interspersed throughout expansive agricultural areas. These wetlands typically form in depressions or low-lying areas where the water table is shallow or where excess water accumulates along irrigation canals and runoff paths. Functioning as Nature-Based Solutions (NBS) for water management, these wetlands enhance flood resilience, shorten the duration of droughts, and filter out pollutants. Even in intensively cultivated zones, these natural water bodies persist as vital elements of a complex mosaic that includes irrigated fields, rainfed farms, shrublands, and deserts—each reflecting the critical influence of water availability on settlement, agriculture, and ecosystem dynamics.