Isfahan faces converging crises (vanishing water, land subsidence, air pollution, and a dying wetland), showing how unbalanced industrial growth can push Iran’s historic cities toward environmental collapse.
Throughout history, Isfahan has been one of Iran’s most important cultural, economic, and architectural centres — so much so that it earned the nickname “Half the World.” Its Zayandeh-Rood River, historic gardens, stone bridges, and unique architecture once symbolized harmony between people, water, and nature.
For centuries, traditional qanat systems and intelligent water management sustained this ecological balance. But in recent decades, climate change, population growth, industrial expansion, and overexploitation of natural resources have shattered it.
The dried bed of the Zayandeh-Rood is the clearest sign of this collapse. Once the artery of the city’s social and economic life, it is now a stretch of cracked earth. Land subsidence, expanding dust storms, declining biodiversity, and the forced migration of farmers from eastern Isfahan are symptoms of a crisis that goes far beyond municipal boundaries — it is a national issue.
A waterless heart in the centre of Iran
Isfahan lies in one of the driest parts of Iran’s central plateau, where rainfall has plummeted, temperatures have risen, and groundwater reserves have been depleted.
Official data show that last year’s rainfall measured only 90 millimetres — 45 percent below the long-term average. In Kouhrang, one of the river’s main headwaters, precipitation dropped by 40 percent. These numbers point not to a temporary drought but to a long-term aridification.
Excessive groundwater pumping has pushed aquifers in plains such as Barkhar and Lenjan to the critical stage, where any new extraction is banned — though illegal wells continue to proliferate.
According to Mansour Shishehforoush, head of Isfahan’s Regional Water Company,
“The Zayandeh-Rood dam now holds only 151 million cubic metres — about 11 percent of its total capacity. If this continues, there will be no water left to distribute.”
The decline in water reserves has directly undermined livelihoods in eastern Isfahan. Once fertile farmlands now lie cracked and barren, forcing many farming families to migrate.
A silent earthquake beneath the city
In recent years, Isfahan has faced one of the most dangerous and silent environmental threats in Iran: land subsidence — a slow earthquake that eats away at the city’s foundations.
Data from the Geological Survey show that some areas, including the Isfahan–Barkhar plain and the city’s eastern districts, are sinking by as much as 30 centimetres a year.
This gradual yet destructive process has fractured farmlands, cracked houses, and endangered vital infrastructure such as gas pipelines, roads, and energy networks. Even Isfahan’s historic monuments are at risk. Experts warn that if unregulated groundwater extraction continues, parts of the Isfahan–Barkhar plain could become permanently unusable.
The main causes are weak monitoring of illegal wells and the absence of any aquifer restoration plan. Subsidence may advance quietly, but its consequences could shake Isfahan’s future to the core.
A city struggling to breathe
Isfahan has also suffered from chronic air pollution for years — a crisis that worsens each winter and lingers through the summer.
Air-monitoring data show that the Air Quality Index (AQI) in many parts of the city frequently exceeds 107, a level considered unhealthy for sensitive groups.
Dariush Gol-Alizadeh, head of Isfahan’s Department of Environment, says:
“Isfahan’s major environmental challenges — from Zayandeh-Rood’s water rights to land subsidence and air pollution — have passed the warning stage and now require urgent decisions at the national level.”
Multiple factors contribute to this suffocating mix: steel and iron smelting plants on the city’s outskirts, heavy fuel consumption, an ageing vehicle fleet, and the dry regional climate that limits natural ventilation.
Despite repeated warnings, there is still no comprehensive plan to reduce pollutants. Temporary measures — school closures, traffic restrictions — offer only brief relief.
Gavkhouni: gateway to the desert
To the east of the city lies the Gavkhouni wetland, once a 47,000-hectare sanctuary for thousands of migratory birds. It helped regulate the region’s climate and control dust storms. Today, only a cracked salt flat remains.
The desiccated lakebed has become a source of saline and toxic dust that travels hundreds of kilometres, polluting the air in Isfahan, Yazd, and Kerman. Experts warn that the drying of Gavkhouni is accelerating desertification across central Iran.
According to the provincial Environment Department, the wetland — listed under the Ramsar Convention — has not received its natural water share for more than two decades. The Zayandeh-Rood no longer carries enough flow to reach its end, spelling the wetland’s slow death.
Gavkhouni was one of Iran’s last natural shields against dust storms. Its disappearance signals a national environmental emergency that, if unchecked, could permanently alter the ecology of the central plateau.
When industry drains nature’s veins
Isfahan is often called “the beating heart of Iranian industry.” But this heart has been pumping at the cost of drying the veins of nature.
In a dry, water-scarce plateau, water-intensive industries such as steel, iron smelting, and petrochemicals have expanded without proper environmental assessment. These industries now consume more than 60 percent of the province’s industrial water use — plants that, in most countries, are built near coasts to use seawater.
As a result, traditional agriculture in the east of the province has collapsed. The local economy, once sustained by the Zayandeh-Rood, is on the verge of breakdown. This unbalanced model of industrial development has become a symbol of Iran’s uneven modernization — where factories run, but rivers and soil pay the price.
Isfahan as mirror of Iran’s future
The crisis in Isfahan is more than a local alarm; it is a mirror reflecting Iran’s likely future if unsustainable resource extraction continues.
Saving Isfahan is not merely about reviving a river. It is about preserving a part of Iran’s civilizational identity. The Zayandeh-Rood and Gavkhouni wetland are not just environmental features — they are fragments of Iran’s collective memory and life.
Sustaining life in Isfahan now requires national will and collective decisions: reforming water consumption patterns, using recycled water in industry, and halting the expansion of water-intensive plants.
In short, saving Isfahan means managing water, not consuming it.
Without such a shift, the city that once symbolized balance between humanity, history, and nature could become the emblem of its collapse — not just for Isfahan, but for the entire nation.
