#nilometer

Rawda Island Nilometer, Egypt

The nilometer is an ancient device used to measure the water level of the Nile River.

These measurements were crucial in Ancient Egypt, as the level of the Nile determined the fertility of agricultural land and therefore the annual harvest.

A nilometer could consist of a graduated column, a stone staircase, or a well connected to the river.

Priests and officials were analyzing these measures to predict floods and plan resource distribution.

Over the course of some five millennia the ancient Egyptians developed a distinctive material culture shaped in large part by their local geography, natural resources, and relationship with the Nile River. In the 5th Century BCE, the Greek historian Herodotus noted that “any sensible person” could see that Lower Egypt was a “gift of the river” (Herodotus, 2.5). While his comments were limited to the areas in the north and in the Delta, they really ring true for all the Nile River Valley. Every aspect of life in Egypt depended on the river – the Nile provided food and resources, land for agriculture, a means of travel, and was critical in the transportation of materials for building projects and other large-scale endeavors. It was a critical lifeline that literally brought life to the desert.

Map of Ancient Egypt (www.shutterstock.com 211163719)

The modern name of the Nile River comes from the Greek Nelios, but the Egyptians called it Iteru or “River.” The Nile is the longest river in the world, measuring some 6,825 km. The Nile River System has three main branches – the White Nile, the Blue Nile, and the Atbara river. The White Nile, the river’s headwaters, flows from Lake Victoria and Lake Albert. The Blue Nile brings about the inundation or annual flood and provides most of the river’s water and silt. The Atbara river has less of an impact, as it flows only occasionally.

In the south, the Nile has a series of six main cataracts, which begin at the site of Aswan. A cataract is a shallow stretch of turbulent waters formed where flowing waters encounter resistant rock layers. In the case of the Nile cataracts, large outcroppings of granite make the flow of the river unpredictable and much more difficult to traverse by boat. The cataract system created a natural boundary at Aswan, separating Egypt from its southern neighbor, Nubia.

Ancient Egypt was located in Northeastern Africa and had four clear geographic zones: the Delta, the Western Desert, the Eastern Desert, and the Nile Valley. Each of these zones had its own natural environment and its own role within the Egyptian State. Cities could only flourish in the Nile Delta, the Nile Valley, or desert oases, where people had access to water, land, and key resources. The ancient Egyptians, who were always keen observers of nature, often associated the Nile Valley with life and abundance and the neighboring deserts with death and chaos.

Kemet or, “black land,” denotes the rich, fertile land of the Nile Valley, while Deshret, or “red land,” refers to the hot, dry desert. The contrast between the red land and the black land was not just visible or geographic, it effected the Egyptians’ everyday lives. The dry climate of the desert, for example, made it an ideal location for cemeteries. There, the annual Nile flood would not disturb people’s graves and the dry climate acted to preserve tombs and their contents. Good preservation and the fact that most people do not live in the desert, are the main reasons that so much of what archaeologists and anthropologists study comes from a funerary context. 

View with the Nile River Valley in the foreground and the desert cliffs in the background. (www.shutterstock.com 1082850872)

The landscapes of Upper and Lower Egypt also differ. The Egyptian word Tawy, means “Two Lands” – this refers to the two main regions of ancient Egypt, Upper and Lower Egypt. Lower Egypt is in the north and contains the Nile Delta, while Upper Egypt contains areas to the South. These two designations may seem counterintuitive to their physical locations, but they reflect the flow of the Nile River, from South to North.

The expansive floodplain of the Nile Delta and the very narrow band of fertile land present in the Nile Valley led to different ways of life. In the Nile Delta for example, the Egyptians constructed their towns and cemeteries on turtlebacks; natural highpoints in the landscape that became islands during the inundation. In addition, the location of the Delta along the Mediterranean and at the entry point into the Levant made it an important area for trade and international contacts. The Delta was a very multi-cultural region throughout Egyptian history.

Ancient Egyptian Sema-Tawy – represents the eternal unification of Upper and Lower Egypt (www.shutterstock.com 1778750570).

The Egyptians thought of the king as the unifier of the “Two Lands.” One of the king’s primary roles was to keep Upper and Lower Egypt united; the Egyptians expressed this visually using something we call the sema-tawy motif. Here you can see two Nile gods symbolically uniting the lands of Upper and Lower Egypt – each depicted in the form of their characteristic plant, the papyrus for Lower Egypt and the lotus for Upper.

The Egyptians constructed their calendar around the yearly cycle of the Nile. It included three main seasons: Akhet, the period of the Nile’s inundation, Peret, the growing season, and Shemu, harvest season. The Egyptians made Nilometers to measure and track the height of the annual inundation – they used the recorded readings from these Nilometers much like more contemporary farmers would use almanacs. One particularly well-preserved example is located on Elephantine Island at Aswan.

The close connection between the Egyptians the Nile River led them to identify a number of Egyptian gods with aspects of the river, its annual flood, and the fertility and abundance associated with them. Hapi, for example, is the incarnation of the life force that the Nile provides; he also symbolizes the annual inundation of the Nile. His round belly and folds of skin represent abundance. Osiris, who is most often recognized in his role associated with the afterlife, is fundamentally a god of regeneration and rebirth. Artists often depicted him with black skin, linking him to the fertility of the Nile River and its lifegiving silt. The broader natural world was a further source of inspiration for Egyptian religion. 

Elephantine Nilometer (Image by author)

The Nile was also an important highway, it was the easiest way to travel and played an essential role in mining expeditions, trade, architectural projects, and general travel. The Egyptians were expert boat builders; images of boats are some of the earliest designs that appear on Egyptian Predynastic Vessels dating to ca. 3500-3300 B.C.E. River access decreased the time and number of individuals needed for the transportation of large objects, like stones, obelisks, and architectural elements. Boats were also common in the funerary religion as well – as a part of the funeral itself and for the afterlife.

Although I’ve only been able to touch on a few key elements here, the natural environment of Egypt and the Nile River impacted every aspect of life in ancient Egypt. The river’s floodplain, water, and silt provided the foundation for civilization and served as a source of inspiration for the people who inhabited northeastern Africa during this pivotal period in history.  

Nilometer is a device for measuring the height of the Nile, usually consisting of a series of steps against which the increasing height of the inundation, as well as the general level of the river, could be measured. Records of the maximum height of the inundation were kept, although there is no firm evidence that these records were used in any systematic way in the determination of taxation on the amount of agricultural land flooded.

Two views of the markings on the Elephantine Nilometer at Aswan on the Nile in Egypt.

Ancient egyptian inscriptions on the rocks, and some modern tourists boats, at the "nilometer” in the Nile River at Aswan.  The height of the annual flood was critical to the agriculture, and hence economy, of ancient egypt and so was monitored closely.  Oh, and taxes applied accodingly.  Have Pharoah and Temple, will tax.