基于土地覆被和水文过程变化的松嫩平原典型区域土地盐渍化成因分析（英文）

编号 zgly0001634838

文献类型 期刊论文

文献题名 基于土地覆被和水文过程变化的松嫩平原典型区域土地盐渍化成因分析（英文）

作者 王志勇  李丽娟 

作者单位 InstituteofGeographicSciencesandNaturalResourcesResearch  CAS  UniversityofChineseAcademyofSciences 

母体文献 Journal of Geographical Sciences 

年卷期 2018年08期

年份 2018 

分类号 S156.41 

关键词 changedetection  hydrologicalprocess  landcover  landsalinization  SongnenPlain 

文摘内容 Causes of land salinization were determined via land cover and hydrological process change detection in a typical part of Songnen Plain.The area of saline land increased from4627 km2 in 1980 to 5416 km2 in 2000,and then decreased to 5198 km~2 in 2015.The transformation between saline land and other land covers happened mainly before 2000,and saline land had transformation relationship mainly with cropland,grassland,and water body.From 1979 to 2007,groundwater depth fluctuated to increase and was mainly deeper than3.3 m.Spatially,the area of the region where groundwater depth was deeper than 3.3 m increased from 46.7%in 1980 to 84%in 2000,while the area of the region almost occupied the whole region after 2000.Precipitation and evaporation changed little,while runoff decreased substantially.Shallow groundwater,change of cropland,grassland,and water body induced from human activities and decrease of runoff and increase of irrigation and water transfer from outer basin were the main reasons for land salinization before 2000.After 2000,groundwater with relatively great depth could not exert great influence on land salinization.Protection of grassland and wetland prevented the increase of the area of saline land.