Rain is the main water resource in Syria, affecting the availability of all other water resources. The average annual rainwater resource is estimated at 46 billion cubic metres (BCM).

Egypt, which lies in north-eastern Africa and extends into the Sinai Peninsula in Asia, covers a total area of 1 million square kilometres (km²). It is bordered by the Mediterranean Sea to the north, the Gaza Strip, Israel and the Red Sea to the east, Sudan to the south and Libya to the west.

About 98% of Egypt’s fresh water resources originate outside of its borders, such as the Nile River and groundwater aquifers. Indeed, the Nile River provides the country with some 93% of its water requirements

groundwater is the main water resource in Oman used for domestic, industrial and agricultural purposes.

Wastewater reuse is among the main alternatives to overcome water scarcity challenges and to meet the current water needs

Water resources in the UAE can be classified into two main categories: conventional, such as surface water (including aflaj water systems, springs and dams) and groundwater (shallow and deep aquifers), and non-conventional, such as desalinated water, treated wastewater and cloud seeding.

Groundwater quality in the shallow and deep aquifer systems, particularly in the Bajada region, ranges from 600 to 2000 parts per million (ppm). Household water quality is considered one of the best in the world, reaching 96%

Desalination of seawater and brackish groundwater will continue to be a viable option to increase water supply. Considering recent cost-cutting innovations in the desalination process, this alternative may prove to be a relatively inexpensive option in the near future.

The Zayandehroud, which means ‘life-giving river’, is the largest river in central Iran and has traditionally been a major source of water for the country

Benefits of marshland are; Flood hazard mitigation, Water purification, and Production and sale of goods such as dairy products from water buffalo, milk etc