The Songnen Plain () in

Northeast China Northeast China or Northeastern China () is a geographical region of China, which is often referred to as "Manchuria" or "Inner Manchuria" by surrounding countries and the West. It usually corresponds specifically to the three provinces east of t ...

is named after the

Songhua The Songhua or Sunghwa River (also Haixi or Xingal, russian: Сунгари ''Sungari'') is one of the primary rivers of China, and the longest tributary of the Amur. It flows about from the Changbai Mountains on the China–North Korea bord ...

and

Nenjiang River The Nen River or Nenjiang (), or Nonni () is a river in Northeast China. The Nen River flows through the northern part of Heilongjiang Province and the northeastern section of Inner Mongolia, some parts of the river forming the border between the ...

s and is connected to the

Sanjiang Plain The Sanjiang Plain includes the Amur River (also known as the Heilong, or literally, "Black Dragon" or River), Songhua and Ussuri (also known as the Wusuli) rivers and covers 23 counties in Heilongjiang Province, China encompassing about 109,000&nb ...

through the

Songhua River The Songhua Postal Romanization, or Sunghwa River (also Haixi or Xingal, russian: Сунгари ''Sungari'') is one of the primary List of rivers of China, rivers of China, and the longest tributary of the Amur. It flows about from the Chang ...

Valley; a small plain lies north of

Xingkai Lake Lake Khanka (russian: о́зеро Ха́нка) or Lake Xingkai (), is a freshwater lake on the border between Primorsky Krai, Russia and Heilongjiang province, Northeast China (at ). Etymology On the Delisle map of 1706, the lake is named ...

in the east.

Salinization

The alkali-saline area of the western Songnen Plain is one of China's most important alkali-saline areas and have been increasing in size by 20,000 square hm per year as a result of natural and anthropogenic factors, which is impeding economic development in the area. Efforts are being made to establish and protect shelterbelt forests, improve the management techniques used in the grasslands, to raise fish and reeds in the lakes of the region, and to improve the conditions of salinized lands.

References

Plains of China {{PRChina-geo-stub