论文部分内容阅读
本文运用环境变迁的理论和方法 ,较系统地分析了松嫩平原西部盐沼的形成与演变机制。本区沼泽形成的主要控制因素是古河道变迁、新构造运动、风力作用、古气候变化。沼泽残余盐碱化与晚更新世松辽大湖的消亡、河道变迁有关 ,现代盐碱化则主要是水利工程、植被破坏和气候变化引起的 ,而且呈迅速加剧的趋势。防治沼泽盐碱化的主要措施是实施水稻和芦苇开发、大规模建立蓄洪区和自然保护区。
This paper uses the theories and methods of environmental change to systematically analyze the formation and evolution mechanism of salt marsh in west Songnen Plain. The main controlling factors for the formation of swamps in this area are ancient river courses, neotectonic movement, wind action and paleoclimate changes. The remnant salinization of the swamp is related to the demise of Songliao Great Lakes in the late Pleistocene and the change of river courses. Modern salinization is mainly caused by water conservancy projects, vegetation destruction and climate change, and shows a trend of rapid increase. The main measures to prevent and control marsh salinization are to carry out the development of rice and reeds, and to establish large-scale flood storage areas and nature reserves.