Persian Gulf rain contributions, there is still a deficit of 416 cubic kilometers per year. This difference is supplied by currents at the Strait of Hormuz. The water from the Gulf has a higher salinity, and therefore exits from the bottom of the Strait, while ocean water with less salinity flows in through the top. Another study revealed the following numbers for water exchanges for the Gulf: evaporation = -1.84m/year, precipitation = 0.08m/year, inflow from the Strait = 33.66m/year, outflow from the Strait = -32.11m/year, and the balance is 0m/year. Data from different 3D computational fluid mechanics models, typically with spatial resolution
Piracy in the Persian Gulf bin Muhammad Al Qasimi argues in his book "The Myth of Piracy in the Gulf" that the allegations of piracy were simply excuses used by the British to impose imperialism. Piratical activities were common in the Persian Gulf from the late 18th century to the mid 19th century, particularly in the area known as the "Pirate Coast" which spanned from modern-day Qatar to Oman. Piracy was alleviated from 1820 with the signing of the General Maritime Treaty, cemented in 1853 by the Treaty of Maritime Peace in Perpetuity, after which the Pirate Coast began to be known by the British