The Imjin River ( in South Korea) or Rimjin River ( in North Korea) is the 7th largest river in Korea. It flows from north to south, crossing the Demilitarized Zone and joining the Han River downstream of Seoul, near the Yellow Sea. The river is not the namesake of the Imjin War (Japanese invasions in the late 16th century). History Imjin River was the site of two major battles: the Battle of Imjin River during the Imjin war in 1592, and the Battle of the Imjin River that took place during the Korean War. Joint Use Zone On November 4, 2018, a 20-member team consisting of 10 people from North Korea and 10 people from South Korea began a joint inter-Korean survey intended to lead to the development a Joint Utilization Zone along Imjin River's estuary. The Zone would allow civilians to access the estuary for tourism, ecological protection and the collection of construction aggregate under the protection of militaries from both sides of the Korean border. On November 5, 2018, the councils of South Korea's Gangwon and Gyeonggi provinces, which border the DMZ, signed a “peace working agreement” at Dorasan Station in Paju, giving local approval to the Joint Utilization Zone. The inter-Korean survey of Imjin River's estuary was completed on December 9, 2018. The new map of the river's estuary, which consists of newly discovered reefs, was to be made public by January 25, 2019. Characteristics The active channel of Imjin River uses only about 150 to 200 feet of the width of the dry riverbed that it runs through, which is bordered by almost vertical rock cliffs standing approximately above the mean low water level. It gives no indication in normal times of the tremendous power it develops when in flood. During the Korean rainy season of July and August, the Imjin becomes a raging torrent, largely confined by its steep rocky banks. Fed by its larger tributaries and many small mountain streams, it reaches flood heights of above mean water level and a velocity of 15 to . The rapid runoff of approximately 95 percent of precipitation during heavy general rains has caused Imjin, on occasion, to rise at a rate of more than six feet per hour. During the severe Korean winter, icy winds sweep down the Imjin; the sub-zero temperatures cause thick ice to form on the river. Fluctuations in the level of