东北森林地区与国内外其它地区地表水中主要离子浓度及酸中和能力的比较

几十年来,中国二氧化硫排放量持续增长同多数地区一样,东北森林地区酸性物质沉降量一直较高。资料显示,在中俄边境及中国与北朝鲜边境的大片森林地区岩床普遍不易风化且钙矿物含量低,这与挪威南方七、八十年代遭受大范围的地表水酸化时的情形类似。为探明东北森林地区地表水是否存在酸化潜势,本研究对东北森林地区4个地表水中主要离子浓度与英国、中欧地区、挪威南部、西部、中国南方等地资料数据进行了比较,发现东北森林地区地表水中具有较高的酸中和能力,即具有较大抵御未来地表水酸化的能力。

Comparison of Major Ion Concentration and Acid Neutralizing Capacity in Surface Water between Northeast Forest and Other Areas

In the past several decades,China＇s SO2 emission amount increased steadily.Like most other regions,the deposition of acidic materials in forest area of Northeast China remained a high level.The bedrock in forested regions over the borders between China,Russia and North Korea is generally difficult to weathering and has a low content of calcareous minerals.These conditions are similar to Norway when large amount of surface water was acidified in 70s and 80s of 20th century.This paper compared the major ions concentration of four northeast forest regions with that of U.K.,central Europe,south and east of Norway and southern China to study the possibility of acidification for the forest area of Northeast China.It was found that the surface water of northeast forest areas has a high acid neutralizing capacity.