Nile Delta

• 1. Introduction

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  The Nile Delta stretches across 240 km of Egypt's Mediterranean coastline, from Alexandria in the west to Port Said in the east. Seen from above, it fans out like a triangle or flower, which is exactly why ancient writers reached for the word delta, the triangular Greek letter. About 70 million people live in this region today, farming soils that can reach 70 feet in depth. Yet beneath those fields, buried under centuries of silt, lie sunken temples, treasure-carrying ships, and the ruins of a city once compared to Atlantis. And above the waterline, a different kind of pressure is building: the sea is advancing, and the delta that built a civilisation is slowly retreating into the Mediterranean. How did this landscape form, what does it hold, and what does its future look like? Those are the questions this documentary will answer.

• 2. Shape of the Land

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  The Nile enters its delta just north of Cairo, where the river splits into two main distributaries. The Damietta branch flows to the northeast, and the Rosetta branch flows to the northwest, each ending at a Mediterranean port city that shares its name. From north to south, the delta runs approximately 160 km. Together those two branches are the survivors. In ancient times the delta had many more channels, with records from Ptolemy listing seven distributaries by name: the Pelusiac, Tanitic, Mendesian, Phatnitic, Sebennytic, Bolbitine, and Canopic. Modern Egyptologists looking at the Pharaonic era count at least five main branches. The Pelusiac, Sebennytic, and Canopic have all dried up over the centuries, lost to flood control, silting, and shifts in the landscape. One additional defunct channel, the Wadi Tumilat, stands as a further reminder of how much the delta's internal geography has changed. Along the coast, a series of lakes and lagoons frames the delta's edges. The Suez Canal runs east of the delta and connects to the coastal Lake Manzala in the northeast. To the northwest sit Lake Burullus, Lake Idku, and Lake Mariout. These coastal waters were once more isolated from the open sea, but that barrier is weakening.

• 3. Five Thousand Years of Farming

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  People have farmed the Nile Delta intensively for at least five thousand years, drawn by soils built up over countless flood cycles. The annual flooding that replenished those soils ended with the construction of the Aswan Dam, which stopped the upstream supply of nutrients and sediments. Today, farmers in the floodplains rely heavily on artificial fertilizers to compensate for what the river no longer delivers. Archaeological sites are scattered across the region. The Rosetta Stone, one of the most significant finds in the history of writing, was discovered in the port city of Rosetta (known in Arabic as Rashid) in 1799. In January 2019, a team led by Mostafa Waziri excavated the Kom Al-Khelgan area and uncovered tombs from the Second Intermediate Period alongside burials from the Naqada II era. Those graves held animal remains, amulets, faience scarabs, round and oval pots with handles, flint knives, and broken and burned pottery. Every burial included skulls and skeletons in a bent position. The finds were not well-preserved, but they confirm that this region has been a place of human settlement and ceremony across a vast stretch of time.

• 4. Egypt's Atlantis

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  In July 2019, a search below the Mediterranean's surface off Egypt's north coast yielded extraordinary results. A team of Egyptian and European divers, led by underwater archaeologist Franck Goddio, uncovered a small Greek temple, ancient granite columns, treasure-carrying ships, and bronze coins from the reign of Ptolemy II at the sunken city of Heracleion. The coins and structures date to the third and fourth centuries BC. Heracleion is colloquially known as Egypt's Atlantis, a city that once stood at the delta's edge before slipping beneath the sea. The same investigation also uncovered the ruins of the city's main temple, lying on the seafloor off the north coast. The delta has a long habit of preserving what the surface world forgot. Artifacts from ancient coastal sites continue to surface both on the shoreline and beneath the water, suggesting that the buried and sunken layers of the Nile Delta still hold chapters of history that have not yet been read.

• 5. Wildlife at the Water's Edge

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  Several hundred thousand water birds winter in the Nile Delta, including the world's largest concentrations of little gulls and whiskered terns. Grey herons, Kentish plovers, shovelers, cormorants, egrets, and ibises also make their homes here. During autumn, parts of the river run red with lotus flowers. The Upper Nile region is associated with the Egyptian lotus, while the papyrus sedge (Cyperus papyrus) grows along the Lower Nile, though it is far less common than it once was and is now becoming quite rare. Frogs, turtles, tortoises, mongooses, and the Nile monitor still inhabit the delta. Nile crocodiles and hippopotamus, both widespread here in antiquity, have long since disappeared from the region. Fish include the flathead grey mullet and soles. The presence or absence of specific species maps directly onto how much the delta has changed: the birds arrive in vast numbers each winter, but the large mammals that once shared this landscape are gone.

• 6. A Rising Sea

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  Egypt's Mediterranean coastline is losing land to the sea in some places at a rate of 100 yards per year. The Nile Delta, sitting low and flat at the edge of that coastline, is especially exposed. Without the sediment that the Aswan Dam now traps upstream, the natural process that once rebuilt the coast from within has stopped. A 30 cm rise in sea level could affect roughly 6.6% of the delta's total land cover area. At 1 metre of sea level rise, an estimated 887 thousand people could face flooding and displacement; the calculation also puts roughly 100 km2 of vegetation, 16 km2 of wetland, 402 km2 of cropland, and 47 km2 of urban land at risk, with approximately 450 km2 potentially submerged in total. Agricultural land is already turning saline in some areas. Farming has been abandoned in places, while in others sand has been imported to push back the effect. The ancient port city of Alexandria, built on the delta's western edge, could disappear under the Mediterranean if polar ice caps were to melt. Climate projections tied to these changes suggest the delta could produce as many as seven million climate refugees by the end of the 21st century, a figure that puts the slow geography of erosion into very human terms.