1957—2019年红碱淖时空演变过程及其成因分析

Analysis on the Space-time Evolvement Process and Cause of Hongjiannao during 1957 and 2019

借助遥感影像、数字栅格地图和地形图数据,提取红碱淖1957-2019年长时间序列范围数据集,结合长时序空间分布对比图和面积变化趋势曲线图对红碱淖时空演变过程和成因进行分析。结果表明:1)1957—2019年红碱淖面积经历了“扩张—稳定—萎缩—恢复”四个阶段,扩张和稳定阶段是其正常的发展过程,萎缩阶段折射出生态问题,恢复阶段反映了治理成效。2)红碱淖萎缩主要是自然条件和人为因素共同作用的结果。3)红碱淖恢复期面积有所增长的原因在于政策保护、人工降雨和上游水库放水等措施已有成效,建议持续实施相关保护措施,恢复红碱淖正常的生态功能。

In this paper,with the help of remote sensing images,digital raster maps and topographic map data,the Hongjiannao long-term series data set from 1957 to 2019 is extracted.Combined with the long-term spatial distribution comparison chart and the area change trend curve chart,The cause of temporal and spatial evolution of Hongjiannao is analyzed.The results show that:(1)The area of Hongjiannao underwent four stages of"expansion-stabilization-shrinkage-recovery"from 1957 to 2019.The expansion and stabilization stage is its normal development process,the shrinking stage reflects ecological problems,and the recovery stage reflects Governance effectiveness.(2)The atrophy of Hongjiannao is mainly the result of the combined effect of natural conditions and human factors.(3)The area of Hongjiannao increased during the restoration period due to the effect of policy protection,artificial rainfall,and water release from upstream reservoirs.It is recommended that relevant protection measures continue to be implemented to restore the normal ecological functions of Hongjiannao.