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Posts tagged Yalu River

Sediments in Korea Bay and Incheon Bay, North and South Korea – March 25th, 2011

38.1N 125.4E

March 25th, 2011 Category: Image of the day, Rivers, Sediments

Korean Peninsula - March 11th, 2011

Sediments pour off the western coast of the Korean Peninsula and into the Yellow Sea. They are particularly concentrated in Korea Bay (above) and Incheon Bay (center, below).

Incheon Bay is located by the border between North Korea and South Korea, and is famous for its high tidal range. Korea Bay, also called West Korea Bay, is located in the northern part of the Yellow Sea, between Liaoning Province of China and North P’yŏngan Province of North Korea.

Korea Bay is separated from the Bohai Sea by the Liaodong Peninsula, with Dalian at its southernmost point. The Yalu (Amnok) River, which marks the border between China and North Korea, empties into the Korea Bay between Dandong (China) and Sinŭiju (North Korea).

Volcanic Baekdu Mountain on the Border of North Korea and China

41.4N 128.2E

September 12th, 2009 Category: Volcanoes

North Korea - September 4th, 2009

North Korea - September 4th, 2009

Baekdu Mountain, also known as Changbai Mountain in China, is a volcanic mountain on the border between North Korea and China, visible near the top center of this orthorectified image.

At 2,744 m (9,003 ft), it is the highest mountain of the Changbai mountain range to the north and Baekdudaegan mountain range to the south. It is also the highest mountain on the Korean peninsula and Manchuria.

Baekdu Mountain is stratovolcano whose cone is truncated by a large caldera, about 5 km (3.1 miles) wide and 850 m (2,789 ft) deep, partially filled by the waters of the large Heaven Lake, which appears dark black here. The lake has a circumference of 12 to 14 kilometres (7.5-8.7 miles), with an average depth of 213 m (699 ft) and maximum depth of 384 m (1,260 ft).

Water flows north out of the lake, and near the outlet there is a 70 metre (230 ft) waterfall. The mountain is the source of the Songhua, Tumen (Duman) and Yalu (Amnok) rivers.

The central section of Baekdu Mountain rises about 3 mm every year, due to rising levels of magma below the central part of the mountain. Sixteen peaks exceeding 2,500 m (8,200 ft) line the caldera rim surrounding Heaven Lake.

Sediments from Yalu/Amnok River Flowing into Korea Bay

35.1N 126.8E

May 29th, 2009 Category: Rivers

Korea and China - May 18th, 2009

Korea and China - May 18th, 2009

Sediments are present along much of the Korean and Chinese coastline. This is particularly evident on the border between China and North Korea, where the Yalu River (Chinese) or Amnok River (Korean) is discharging a dense brown cloud of silt into the Korea Bay.

From 2,500 m above sea level on Baekdu Mountain, in the Changbai mountain range, on the China-North Korea border, the river flows south to Hyesan before sweeping 130 km northwest to Linjiang. It then returns to a more southerly route for a further 300 km to empty into the Korea Bay between Dandong (China) and Sinŭiju (North Korea).

The river is 790 km (491 mi) long and receives the water from over 30,000 km2 of land. The Yalu’s most significant tributaries are the Changjin, Heochun and Tokro rivers.

The river is not easily navigable for most of its length: although at its widest it is around 5 km, the depth is no greater than 3 m and much of the river is heavily silted.