To ensure adequate water availability for their crops, ancient Egyptians have found the means to deal with the seasonal flood that took about six months; agricultural land becomes completely submerged. This is why farmers have dug irrigation canals and built storage basins, built by building small dams, in order to deliver water to distant and high lands that are not flooded. They also carried the water in the bucket; they hung from a portable yoke on their shoulders. For the same purpose, Shadov invented the era of the modern state. The chadof consists of a long wooden mast that weighs on a pillar or vertical pillar, or attached to a wooden frame. The shadowed can move axially up and down; or side to side. In use, pull the floating agent down to fill the bucket with water: it automatically raises the weight of the bucket to where the worker can empty it in the irrigation channel. This has helped to irrigate the highlands, contributing to an increase in yields.
The other is a tool of irrigation in ancient Egypt. It consists of a large number of small vessels installed in a wheel wheel connected to a branch connected by a cow that runs the branch that runs the wheel. The use of Sakia continued in the Ptolemaic period, and was later developed during the reigns of the successors and governors of Muslims.
During his stay in Alexandria, the Greek scientist Archimedes invented the trench machine, also known as the Archimedes snail. The trench consists of a wooden snail surrounded by a pierced disk. When the bottom is placed in the water and the tap is run, the snail causes the water to rise to higher levels.
The collection of crop taxes in the Ptolemaic period, by order of governors, was based on flood levels. To determine these levels, the officials used a portable instrument known as the "Nile scale"; perhaps a long stick of wicker was scratched with marks of various levels. The temples, which were provided with Nile standards, were built at sites along the river.
After the opening of the Muslims to Egypt, the kings and sultans set up many projects; to dig canals, canals and dams; in order to deliver the Nile water: for use in agriculture and drinking. When Sultan Saladin built the walls around Cairo, the surfaces were used as water channels. Water was transferred from these canals, through pottery pipes, to supply water to the houses, which were distributed to kitchens, bathrooms and basins. Sultan al-Nasir Muhammad ibn Qalawun established a canal carrying large quantities of flowing water and four streams. The function of Sakka was an important function in the era of the caliphs and Muslim preachers in Egypt. Al-Sikka was responsible for transporting water from reservoirs to mosques, schools and public drinking grounds. As with the Greek-Roman governors, the Muslim rulers also decided to assess taxes collected from the peasants: on the basis of the flood of the Nile. They also used the scale of the Nile, and were appointed on the island of kindergarten employee assigned to record water level per day, according to reading the scale of the Nile on the island.

Tags: Sciences
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