摘要
[目的]监测2000—2013年来松嫩平原盐碱地时空演变过程,为松嫩平原盐碱地防治提供理论依据。[方法]以MODIS影像为主要数据源,结合野外实测样点建立回归模型,对松嫩平原土壤含盐量进行定量反演。将整个研究时期分为3个时段:时段1(2000—2004年),时段2(2004—2008年),时段3(2008—2013年)。[结果]时段1和时段2盐碱地面积增加,增加速度为5 109.75和2 240.62km2/a,同时盐碱化程度加剧;以2008年为转折点,时段3盐碱地面积减少,主要是轻度盐碱地的减少,但是盐碱化程度仍在加剧。[结论]松嫩平原的盐碱化趋势不容乐观,应该采取紧急措施防止盐碱化程度进一步恶化,保护松嫩平原的生态环境健康发展。
[Objective]The objective of the study is to monitor the spatio-temporal evolution of saline soil in Songnen Plain and provide a theoretical basis for the prevention and treatment of saline soil in this region.[Methods]We established a regression model based on MODIS images and the field measured samples to retrieve soil salt content on Songnen Plain quantitatively.Study period can be divided into three sub-periods：period one（2000—2004）,period two（2004—2008）and period three（2008—2013）.[Results]The area of saline-alkali land increased and salinization was becoming worse in period one and two,and the rate of increase reached 5 109.75km^2/a and 2 240.62km^2/a respectively.After the turning point in 2008,the area of saline-alkali land（mainly the light saline-alkali land）decreased in period three,but the salinization degree was still growing.[Conclusion]Songnen Plain salinization is not optimistic,we should take emergent measures to prevent the further salinization and to ensure the healthy development of eco-environment of Songnen Plain.
出处
《水土保持通报》
CSCD
2017年第1期155-160,共6页
Bulletin of Soil and Water Conservation
基金
国家自然科学基金面上项目"气候变暖背景下东北多年冻土退化对温室气体排放的影响"(41571199)
国家自然科学基金青年项目(41001243)
黑龙江省自然科学基金(D201409)
黑龙江省普通高校青年骨干学术项目(1253G034)
哈尔滨师范大学硕士研究生创新基金重点项目(HSDSSCX2015-11)
关键词
松嫩平原
盐碱化
反演
动态变化
Songnen Plian
salinization
retrieve
dynamic change
