Tall qasab reeds defined the landscape, rising in dense stands above freshwater lakes. The largest of these lakes, Haur az-Zikri and Umm al-Binni -- whose name means Mother of Binni, after a species of barbel fish -- anchored an ecosystem of extraordinary richness. Basra reed-warblers and marbled teal bred among the reed beds. The smooth-coated otter hunted in channels between floating islands of vegetation. The Levant darter, a subspecies of the African darter found nowhere else, fished these waters. The Ma'dan navigated this labyrinth in slender boats, their lives shaped entirely by the rhythm of water. They built mudhifs, the great arching guest houses of bundled reeds, using construction techniques that had changed little since the Sumerians depicted similar structures on cylinder seals five millennia ago.

Irrigation projects had been quietly sapping the marshes since the 1970s. By the early 1980s, water levels were visibly dropping. But what happened after the 1991 Gulf War was not gradual decline. It was punishment. Following the Shia uprising against Saddam Hussein's government, the Iraqi regime undertook massive drainage projects to flush out insurgents and punish the Marsh Arab population for their participation in the revolt. The government blocked the southward flow of Tigris tributaries with enormous embankments, channeling the water instead into the Al-Amarah or Glory Canal. Two-thirds of the Central Marshes were gone by 1993. By the late 1990s, the Central Marsh had become completely desiccated -- the most severely damaged of Iraq's three main wetland systems.

The draining pushed an entire ecosystem to the brink. Conservationists feared the Levant darter and the Maxwell's subspecies of the smooth-coated otter had vanished entirely. Small, threatened populations of both have since been confirmed, but their survival remains precarious. Bunn's short-tailed bandicoot rat, a species described only from specimens collected in the Central Marshes and found nowhere else on Earth, was long feared extinct -- though a 2022 study confirmed small populations survive. Thousands of fish and waterfowl died as waters receded. A study by Royal Holloway, University of London concluded that the Central Qurna Marshes essentially no longer existed as an ecosystem. The damage rippled outward: migratory birds that used the marshes as a stopover between Eurasia and Africa lost a critical link in their flyway, causing population declines as far away as Ukraine and the Caucasus.

After the 2003 invasion of Iraq, local Marsh Arabs began dismantling embankments and drainage works on their own initiative, sometimes before any official authorization arrived. The Central Marshes showed little recovery through 2003, but by early 2004 a patchwork of lakes had reappeared in northern areas. Reeds crept back. Fish and birds returned. By 2008, seventy-five percent of the marshes had been restored. But the recovery has stalled. Upstream damming by Turkey and Iran has reduced the combined volume of the Tigris and Euphrates by sixty percent, according to the United Nations. Water salinity has soared to 15,000 parts per million in some areas, up from 300 to 500 ppm in the 1980s. The poisoned water hinders the return of native plants and fish, and threatens the buffalo herding and fishing that remain the chief livelihoods of the Ma'dan who have come home. The marshes have shrunk to fifty-eight percent of their pre-drainage area and continue to decline. Recovery, it turns out, is far harder than destruction.