The Nile Delta ( ar, دلتا النيل, or simply ,
) is the
delta formed in
Lower Egypt where the
Nile
The Nile, , Bohairic , lg, Kiira , Nobiin: Áman Dawū is a major north-flowing river in northeastern Africa. It flows into the Mediterranean Sea. The Nile is the longest river in Africa and has historically been considered the longest ...
River spreads out and drains into the
Mediterranean Sea
The Mediterranean Sea is a sea connected to the Atlantic Ocean, surrounded by the Mediterranean Basin and almost completely enclosed by land: on the north by Western and Southern Europe and Anatolia, on the south by North Africa, and on the ...
. It is one of the world's largest river deltas—from
Alexandria
Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...
in the west to
Port Said in the east, it covers of Mediterranean coastline and is a rich
agricultural region. From north to south the delta is approximately in length. The Delta begins slightly down-river from
Cairo
Cairo ( ; ar, القاهرة, al-Qāhirah, ) is the Capital city, capital of Egypt and its largest city, home to 10 million people. It is also part of the List of urban agglomerations in Africa, largest urban agglomeration in Africa, List of ...
.
Geography
From north to south, the delta is approximately in length. From west to east, it covers some of coastline. The delta is sometimes divided into sections, with the Nile dividing into two main
distributaries
A distributary, or a distributary channel, is a stream that branches off and flows away from a main stream channel. Distributaries are a common feature of river deltas. The phenomenon is known as river bifurcation. The opposite of a distributar ...
, the
Damietta
Damietta ( arz, دمياط ' ; cop, ⲧⲁⲙⲓⲁϯ, Tamiati) is a port city and the capital of the Damietta Governorate in Egypt, a former bishopric and present multiple Catholic titular see. It is located at the Damietta branch, an easter ...
and the
Rosetta
Rosetta or Rashid (; ar, رشيد ' ; french: Rosette ; cop, ϯⲣⲁϣⲓⲧ ''ti-Rashit'', Ancient Greek: Βολβιτίνη ''Bolbitinē'') is a port city of the Nile Delta, east of Alexandria, in Egypt's Beheira governorate. The Ro ...
,
flowing into the Mediterranean at port cities with the same name. In the past, the delta had several distributaries, but these have been lost due to flood control, silting and changing relief. One such defunct distributary is
Wadi Tumilat
Wadi Tumilat ( Old Egyptian Tjeku/Tscheku/Tju/Tschu) is the dry river valley ( wadi) to the east of the Nile Delta. In prehistory, it was a distributary of the Nile. It starts near the modern town of Zagazig and the ancient town of Bubastis ...
.
The
Suez Canal is east of the delta and enters the coastal
Lake Manzala
Lake Manzala ( ar, بحيرة المنزلة ''baḥīrat manzala''), also Manzaleh, is a brackish lake, sometimes called a lagoon, in northeastern Egypt on the Nile Delta near Port Said and a few miles from the ancient ruins at Tanis.Dinar, p.51 ...
in the north-east of the delta. To the north-west are three other coastal lakes or lagoons:
Lake Burullus,
Lake Idku and
Lake Mariout
Lake Mariout ( ar, بحيرة مريوط ', , also spelled Maryut or Mariut), is a brackish lake in northern Egypt near the city of Alexandria. The lake area covered and had a navigable canal at the beginning of the 20th century, but at the begin ...
.
The Nile is considered to be an "arcuate" delta (arc-shaped), as it resembles a triangle or flower when seen from above. Some scholars such as Aristotle have written that the delta was constructed for agricultural purposes due to the drying of the region of Egypt.
In modern day, the outer edges of the delta are eroding, and some coastal lagoons have seen increasing salinity levels as their connection to the Mediterranean Sea increases. Since the delta no longer receives an annual supply of nutrients and sediments from upstream due to the construction of the
Aswan Dam
The Aswan Dam, or more specifically since the 1960s, the Aswan High Dam, is one of the world's largest embankment dams, which was built across the Nile in Aswan, Egypt, between 1960 and 1970. Its significance largely eclipsed the previous Aswan L ...
, the soils of the floodplains have become poorer, and large amounts of fertilizers are now used.
Topsoil
Topsoil is the upper layer of soil. It has the highest concentration of organic matter and microorganisms and is where most of the Earth's biological soil activity occurs.
Description
Topsoil is composed of mineral particles and organic matt ...
in the delta can be as much as in depth.
History
People have lived in the Nile Delta region for thousands of years, and it has been intensively farmed for at least the last five thousand years. The delta was a major constituent of Lower Egypt, and there are many archaeological sites in and around the delta. Artifacts belonging to ancient sites have been found on the delta's coast. The
Rosetta Stone
The Rosetta Stone is a stele composed of granodiorite inscribed with three versions of a decree issued in Memphis, Egypt, in 196 BC during the Ptolemaic dynasty on behalf of King Ptolemy V Epiphanes. The top and middle texts are in Ancien ...
was found in the delta in 1799 in the port city of Rosetta (an anglicized version of the name
Rashid). In July 2019 a small Greek temple, ancient granite columns, treasure-carrying ships, and bronze coins from the reign of
Ptolemy II, dating back to the third and fourth centuries BC, were found at the sunken city of
Heracleion, colloquially known as Egypt's Atlantis. The investigations were conducted by Egyptian and European divers led by the underwater archaeologist
Franck Goddio. They also uncovered a devastated historic temple (the city's main temple) underwater off Egypt's north coast.
In January 2019 archaeologists led by
Mostafa Waziri working in the Kom Al-Khelgan area of the Nile Delta discovered tombs from the
Second Intermediate Period
The Second Intermediate Period marks a period when ancient Egypt fell into disarray for a second time, between the end of the Middle Kingdom and the start of the New Kingdom. The concept of a "Second Intermediate Period" was coined in 1942 b ...
and burials from the
Naqada II era. The burial site contained the remains of animals,
amulets and scarabs carved from
faience
Faience or faïence (; ) is the general English language term for fine tin-glazed pottery. The invention of a white pottery glaze suitable for painted decoration, by the addition of an oxide of tin to the slip of a lead glaze, was a major a ...
, round and oval pots with handles, flint knives, broken and burned pottery. All burials included skulls and skeletons in the bending position and were not very well-preserved.
Ancient branches of the Nile
Records from ancient times (such as by
Ptolemy
Claudius Ptolemy (; grc-gre, Πτολεμαῖος, ; la, Claudius Ptolemaeus; AD) was a mathematician, astronomer, astrologer, geographer, and music theorist, who wrote about a dozen scientific treatises, three of which were of importance ...
) show that the delta had seven
distributaries
A distributary, or a distributary channel, is a stream that branches off and flows away from a main stream channel. Distributaries are a common feature of river deltas. The phenomenon is known as river bifurcation. The opposite of a distributar ...
or branches, (from east to west):
*the Pelusiac,
*the Tanitic,
*the Mendesian,
*the Phatnitic (or Phatmetic),
*the Sebennytic,
*the Bolbitine, and
*the Canopic (also called the Herakleotic and the Agathodaemon)
There are now only two main branches, due to flood control, silting and changing relief: the Damietta (corresponding to the Phatnitic) to the east, and the Rosetta (corresponding to the Bolbitine) in the western part of the Delta. The Delta used to flood annually, but this ended with the construction of the
Aswan Dam
The Aswan Dam, or more specifically since the 1960s, the Aswan High Dam, is one of the world's largest embankment dams, which was built across the Nile in Aswan, Egypt, between 1960 and 1970. Its significance largely eclipsed the previous Aswan L ...
.
Population
About 39 million people live in the Delta region. Outside of major cities, population density in the delta averages or more.
Alexandria
Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...
is the largest city in the delta with an estimated population of more than 4.5 million. Other large cities in the delta include
Shubra El Kheima
Shubra El Kheima, ( ar, شبرا الخيمة, lit=hamlet of the tent, , from ) is the fourth-largest city in Egypt after Cairo, Giza and Alexandria. It is located in the Qalyubia Governorate along the northern edge of the Cairo Governorate. It ...
,
Port Said,
El Mahalla El Kubra,
Mansura,
Tanta
Tanta ( ar, طنطا ' , ) is a city in Egypt with the country's fifth largest populated area and 658,798 inhabitants as of 2018. Tanta is located between Cairo and Alexandria: north of Cairo and southeast of Alexandria. The capital of Gharbia ...
, and
Zagazig
Zagazig ( ar, الزقازيق ' , rural: ) is a city in Lower Egypt. Situated in the eastern part of the Nile delta, it is the capital of the governorate of Sharqia.
It is located on the Muweis Canal and is a hub of the corn and cotton ...
.
Wildlife
During autumn, parts of the Nile River are red with
lotus flowers. The Lower Nile (North) and the Upper Nile (South) have plants that grow in abundance. The Upper Nile plant is the Egyptian lotus, and the Lower Nile plant is the Papyrus Sedge (''
Cyperus papyrus''), although it is not nearly as plentiful as it once was, and is becoming quite rare.
Several hundred thousand water birds winter in the delta, including the world's largest concentrations of
little gull
The little gull (''Hydrocoloeus minutus'' or ''Larus minutus''), is a small gull that breeds in northern Europe and across the Palearctic. The genus name ''Hydrocoloeus'' is from Ancient Greek , "water", and , a sort of web-footed bird. The speci ...
s and
whiskered terns. Other birds making their homes in the delta include
grey heron
The grey heron (''Ardea cinerea'') is a long-legged wading bird of the heron family, Ardeidae, native throughout temperate Europe and Asia and also parts of Africa. It is resident in much of its range, but some populations from the more norther ...
s,
Kentish plover
The Kentish plover (''Charadrius alexandrinus'') is a small cosmopolitan shorebird (40-44 g) of the family Charadriidae that breeds on the shores of saline lakes, lagoons, and coasts, populating sand dunes, marshes, semi-arid desert, and tundra.S ...
s,
shovelers,
cormorants,
egret
Egrets ( ) are herons, generally long-legged wading birds, that have white or buff plumage, developing fine plumes (usually milky white) during the breeding season. Egrets are not a biologically distinct group from herons and have the same build ...
s and
ibis
The ibises () (collective plural ibis; classical plurals ibides and ibes) are a group of long-legged wading birds in the family Threskiornithidae, that inhabit wetlands, forests and plains. "Ibis" derives from the Latin and Ancient Greek word ...
es.
Other animals found in the delta include
frog
A frog is any member of a diverse and largely carnivorous group of short-bodied, tailless amphibians composing the order Anura (ανοὐρά, literally ''without tail'' in Ancient Greek). The oldest fossil "proto-frog" ''Triadobatrachus'' is ...
s,
turtle
Turtles are an order of reptiles known as Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked t ...
s,
tortoise
Tortoises () are reptiles of the family Testudinidae of the order Testudines (Latin: ''tortoise''). Like other turtles, tortoises have a shell to protect from predation and other threats. The shell in tortoises is generally hard, and like oth ...
s,
mongoose
A mongoose is a small terrestrial carnivorous mammal belonging to the family Herpestidae. This family is currently split into two subfamilies, the Herpestinae and the Mungotinae. The Herpestinae comprises 23 living species that are native to so ...
s, and the
Nile monitor.
Nile crocodile
The Nile crocodile (''Crocodylus niloticus'') is a large crocodilian native to freshwater habitats in Africa, where it is present in 26 countries. It is widely distributed throughout sub-Saharan Africa, occurring mostly in the central, eastern, ...
s and
hippopotamus
The hippopotamus ( ; : hippopotamuses or hippopotami; ''Hippopotamus amphibius''), also called the hippo, common hippopotamus, or river hippopotamus, is a large semiaquatic mammal native to sub-Saharan Africa. It is one of only two extan ...
, two animals which were widespread in the delta during antiquity, are no longer found there. Fish found in the delta include the
flathead grey mullet
The flathead grey mullet (''Mugil cephalus'') is an important food fish species in the mullet family Mugilidae. It is found in coastal tropical and subtropical waters worldwide. Its length is typically . It is known with numerous English names ...
and soles.
Climate
The Delta has a
hot desert climate
The desert climate or arid climate (in the Köppen climate classification ''BWh'' and ''BWk''), is a dry climate sub-type in which there is a severe excess of evaporation over precipitation. The typically bald, rocky, or sandy surfaces in desert ...
(
Köppen Köppen is a German surname. Notable people with the surname include:
* Bernd Köppen (born 1951), German pianist and composer
* Carl Köppen (1833-1907), German military advisor in Meiji era Japan
* Edlef Köppen (1893–1939), German author and ...
: ''BWh'') as the rest of Egypt, but its northernmost part, as is the case with the rest of the
northern coast of Egypt
The Northern Coast of Egypt ( ar, الساحل الشمالي, "'", North Coast, commonly shortened to "'", "The Coast" or "The Egyptian Coast") extends for about along the Mediterranean Sea, it covers entirely the northern territory of Egypt. ...
which is the wettest region in the country, has relatively moderate temperatures, with highs usually not surpassing in the summer. Only of rain falls on the delta area during an average year, and most of this falls in the winter months. The delta experiences its hottest temperatures in July and August, with a maximum average of . Winter temperatures are normally in the range of at nights to in the daytime. With cooler temperatures and some rain, the Nile Delta region becomes quite humid during the winter months.
Sea level rise
Egypt's Mediterranean coastline experiences significant loss of land to the sea, in some places amounting to a year. The low-lying Nile Delta area in particular is vulnerable to
sea level rise
Globally, sea levels are rising due to human-caused climate change. Between 1901 and 2018, the globally averaged sea level rose by , or 1–2 mm per year on average.IPCC, 2019Summary for Policymakers InIPCC Special Report on the Ocean and Cry ...
associated with
global warming
In common usage, climate change describes global warming—the ongoing increase in global average temperature—and its effects on Earth's climate system. Climate change in a broader sense also includes previous long-term changes to E ...
. This effect is exacerbated by the lack of sediments being deposited since the construction of the
Aswan Dam
The Aswan Dam, or more specifically since the 1960s, the Aswan High Dam, is one of the world's largest embankment dams, which was built across the Nile in Aswan, Egypt, between 1960 and 1970. Its significance largely eclipsed the previous Aswan L ...
. If the polar ice caps were to melt, much of the northern delta, including the ancient port city of
Alexandria
Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...
, could disappear under the Mediterranean. A rise in sea level could affect about 6.6% of the total land cover area in the Nile Delta region. At sea level rise, an estimated 887 thousand people could be at risk of flooding and displacement and about of vegetation, wetland, cropland, and of urban area land could be destroyed,
flooding approximately . Some areas of the Nile Delta's agricultural land have been rendered saline as a result of sea level rise; farming has been abandoned in some places, while in others sand has been brought in from elsewhere to reduce the effect. In addition to agriculture, the delta's
ecosystem
An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the syste ...
s and tourist industry could be negatively affected by global warming. Food shortages resulting from climate change could lead to seven million "climate refugees" by the end of the 21st century. Nevertheless, environmental damage to the delta is not currently one of Egypt's priorities.
The delta's coastline has also undergone significant changes in
geomorphology as a result of the reclamation of coastal dunes and lagoons to form new agricultural land and
fish farms as well as the expansion of coastal urban areas.
Governorates and large cities
The Nile Delta forms part of these 10
governorates
A governorate is an administrative division of a state. It is headed by a governor. As English-speaking nations tend to call regions administered by governors either states or provinces, the term ''governorate'' is often used in translation from ...
:
*
Alexandria
Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...
*
Beheira
Beheira Governorate ( ar, محافظة البحيرة ', , "the governorate of the Lake") is a coastal governorate in Egypt. Located in the northern part of the country in the Nile Delta, its capital is Damanhur.
Overview
Beheira Governorate en ...
*
Kafr el Sheikh
*
Gharbiya
*
Minufiya
*
Qalyubiya
*
Dakahlia
*
Damietta
Damietta ( arz, دمياط ' ; cop, ⲧⲁⲙⲓⲁϯ, Tamiati) is a port city and the capital of the Damietta Governorate in Egypt, a former bishopric and present multiple Catholic titular see. It is located at the Damietta branch, an easter ...
*
Sharqiyah
*
Port Said
Large cities located in the Nile Delta:
*
Abusir
*
Alexandria
Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...
*
Avaris
*
Bilbeis
Belbeis ( ar, بلبيس ; Bohairic cop, Ⲫⲉⲗⲃⲉⲥ/Ⲫⲉⲗⲃⲏⲥ ' is an ancient fortress city on the eastern edge of the southern Nile delta in Egypt, the site of the Ancient city and former bishopric of Phelbes and a Lat ...
*
Bubastis
Bubastis ( Bohairic Coptic: ''Poubasti''; Greek: ''Boubastis'' or ''Boubastos''), also known in Arabic as Tell-Basta or in Egyptian as Per-Bast, was an ancient Egyptian city. Bubastis is often identified with the biblical ''Pi-Beseth'' ( h ...
*
Canopus
Canopus is the brightest star in the southern constellation of Carina and the second-brightest star in the night sky. It is also designated α Carinae, which is Latinised to Alpha Carinae. With a visual apparent magnitude ...
*
Damanhur
Damanhur ( ar, دمنهور ', ; Egyptian: ''Dmỉ-n-Ḥr.w''; cop, ⲡϯⲙⲓⲛ̀ϩⲱⲣ '; ; grc, Ἑρμοῦ πόλις μικρά ') is a city in Lower Egypt, and the capital of the Beheira Governorate. It is located northwest of Cai ...
*
Desouk
Desouk ( ar, دسوق, ) is a city in northern Egypt. Located 80 km east of Alexandria, in the Kafr El Sheikh Governorate and had a population of 137,660 inhabitants as of 2011. It is bordered to the west by the Beheira Governorate.
Desouk ...
*
Damietta
Damietta ( arz, دمياط ' ; cop, ⲧⲁⲙⲓⲁϯ, Tamiati) is a port city and the capital of the Damietta Governorate in Egypt, a former bishopric and present multiple Catholic titular see. It is located at the Damietta branch, an easter ...
*
El Mahalla El Kubra
*
Kafr El Sheikh
*
Leontopolis
*
Mendes
Mendes ( grc-gre, Μένδης, '' gen''.: ), the Greek name of the ancient Egyptian city of Djedet, also known in ancient Egypt as Per-Banebdjedet ("The Domain of the Ram Lord of Djedet") and Anpet, is known today as Tell El-Ruba ( ar, تل ا ...
*
Mit Abu El Kom
*
Mansoura
Mansoura (' , rural: ) is a city in Egypt, with a population of 960,423. It is the capital of the Dakahlia Governorate.
Etymology
''Mansoura'' in Arabic means "victorious". The city is named after the El Mansoura Battle against Louis IX of Fr ...
*
Naucratis
Naucratis or Naukratis (Ancient Greek: , "Naval Command"; Egyptian: , , , Coptic: ) was a city and trading-post in ancient Egypt, located on the Canopic (western-most) branch of the Nile river, south-east of the Mediterranean sea and the city ...
*
Pelusium
*
Port Said
*
Rosetta
Rosetta or Rashid (; ar, رشيد ' ; french: Rosette ; cop, ϯⲣⲁϣⲓⲧ ''ti-Rashit'', Ancient Greek: Βολβιτίνη ''Bolbitinē'') is a port city of the Nile Delta, east of Alexandria, in Egypt's Beheira governorate. The Ro ...
*
Sais
Sais ( grc, Σάϊς, cop, Ⲥⲁⲓ) was an ancient Egyptian city in the Western Nile Delta on the Canopic branch of the Nile,Mish, Frederick C., Editor in Chief. "Saïs." '' Webster's Ninth New Collegiate Dictionary''. 9th ed. Springfield ...
*
Tanis
Tanis ( grc, Τάνις or Τανέως ) or San al-Hagar ( ar, صان الحجر, Ṣān al-Ḥaǧar; egy, ḏꜥn.t ; ; cop, ϫⲁⲛⲓ or or ) is the Greek name for ancient Egyptian ''ḏꜥn.t'', an important archaeological site in the ...
*
Tanta
Tanta ( ar, طنطا ' , ) is a city in Egypt with the country's fifth largest populated area and 658,798 inhabitants as of 2018. Tanta is located between Cairo and Alexandria: north of Cairo and southeast of Alexandria. The capital of Gharbia ...
*
Zagazig
Zagazig ( ar, الزقازيق ' , rural: ) is a city in Lower Egypt. Situated in the eastern part of the Nile delta, it is the capital of the governorate of Sharqia.
It is located on the Muweis Canal and is a hub of the corn and cotton ...
References
External links
*
Adaptationlearning.net: UN project for managing sea level rise risks in the Nile Delta*
{{Authority control
*Delta
River deltas of Africa
Landforms of Egypt
Landforms of the Mediterranean
Flooded grasslands and savannas
Freshwater ecoregions of Africa
Ecoregions of Egypt
Eastern Mediterranean