It then flows along the border between Kuwait and Iran and empties into the Persian Gulf. The rivers provide water for both drinking and farming. The countries that share these rivers have had problems over how the water should be shared.Click to see full answer. Keeping this in view, which rivers are the longest and most important in Southwest Asia?At 1,300 feet (396 m) below sea level, it ranks as the world’s lowest body of water, and its shore represents the lowest land elevation. Southwest Asia’s two longest and most important rivers are the Tigris and the Euphrates, which are often considered parts of the same river system.Likewise, what are the two major rivers in southwest Asia? Tigris-Euphrates river system, great river system of southwestern Asia. It comprises the Tigris and Euphrates rivers, which follow roughly parallel courses through the heart of the Middle East. Correspondingly, what are the 3 most important rivers in southwest Asia? Several important rivers run through this region, including the Tigris and Euphrates in an area commonly referred to as the Cradle of Civilization. Euphrates River. Tigris River. Aras River. Karun River. Jordan River. What is the important irrigation source in SW Asia?Oasis and underground river supplies also provide important sources of water for farming. Desalinization removes salt from sea water. Since areas like the Arabian Peninsula are surrounded by salt water, desalinization would greatly increase the amount of water suitable for irrigation in Southwest Asia.