地理科学 ›› 1990, Vol. 10 ›› Issue (3): 246-256,292.doi: 10.13249/j.cnki.sgs.1990.03.246

• 论文 • 上一篇    下一篇

三江平原地区沼泽成因与泥炭分布规律

牛焕光, 宋海远, 孟宪民   

  1. 中国科学院长春地理研究所
  • 出版日期:1990-05-20 发布日期:1990-05-20
  • 基金资助:
    本文得到国家自然科学基金资助。

THE MARSH GENESIS AND THE LAW OF PEAT DISTRIBUTION IN THE SANJIANG PLAIN

Niu Huanguang, Song Haiyuan, Meng Xianmin   

  1. Changchun Institute of Geography, Academia Sinica
  • Online:1990-05-20 Published:1990-05-20

摘要: 三江平原地区是我国主要沼泽分布区之一。受降水变率大和负地貌平浅等区域自然条件的制约,形成的沼泽绝大部分没有泥炭堆积,少量泥炭沼泽发育在有地下水补给的古河道区、一些沼泽性河流的中上游段以及深洼地中。本区为草本泥炭,全局分布很不平衡,主要赋存于古河道、河漫滩、泥床河漫滩沟谷以及热融深洼地等负地貌类型。

Abstract: The Sanjiang Plain region is one of the main marsh distribution regions in China,where marsh covers an area of 11200 km~2.The marsh formation resulted from the synthetic action of such natural factors as regional geological structure, geomorphology,composition of surface materials,climate,hydrology,etc.Most of marshes did not accumulate peat because of the restraint of regional natural conditions,such as big precipitation variability,smooth and shallow negative landform,etc.The peat marsh only developed at the ancient channel fed with groundwater,the middle and upper reaches of some marsh rivers and deep depressions. The peat of this region belongs to herb peat originated from water-body paludification,and its spatial distribution is unbalanced.The peat deposit in the plain area is characterized by a small quantity and abundant reserves,while the peat deposit in the mountain area is characterized b a great quantity and scarce reserves.There are big deposits with rich peat reserves in the eastern part of the plain and small ones with little peat reserves in the western part of the plain. The peatlands are chiefly distributed at negative lanaforms such as ancient channels,floodland,riverbed-floodland,valley depressions and thermokarst depressions.