摘要
大九湖湿地是华中地区少有的亚热带高山湿地。建国以来,大九湖湿地经历了多次大规模的开发导致该湿地被严重破坏,2005年实施的“大九湖湿地保护与恢复及公园建设工程”使得湿地功能得到一定恢复。为了解大九湖湿地近期土地利用类型的变化状况,本研究结合实地调查及前人工作,构建了大九湖湿地9种土地利用类型,利用2005年、2011年和2017年的高分辨率遥感影像及2018年的无人机影像进行土地利用解译,研究了3个时期土地利用的动态变化和类型转换,探索湿地变迁的原因及其驱动力。结果表明,2005—2011年间,新增了湖泊(84.41 hm2)这一类型,主要由旱生草甸、林地和农田转化而来。面积减少最多的是农田,主要向旱生草甸和湿生草本沼泽转化。2011—2017年间,新增了中生草甸(80.07 hm^(2))这一类型,主要由湿生泥炭沼泽、湿生草本沼泽和旱生草甸转化而来。面积减少最多的是农田,主要向旱生草甸转换。总之,研究时段内,大九湖湿地类型和面积均呈增加趋势,湿地景观得到一定恢复,湿地生态环境有所改善。驱动力分析表明,湿地自然保护区的设立及一系列有效的湿地生态恢复工程是大九湖湿地土地利用变化的最主要驱动力。本文研究结果可为湿地的恢复和保护提供参考和建议。
Dajiu lake wetland is a rare subtropical alpine wetland in Central China.The wetland has experienced several periods of large-scale development since the founding of the People’s Republic of China,which has led to the serious destruction of the wetland.The“Dajiu Lake wetland protection and restoration and park construction project”implemented in 2005 has made the wetland function recovered to a certain extent.To understand the land use changes in Dajiuhu wetland,the authors identified nine land use types of Dajiu lake wetland based on field investigation and previous work.The high-resolution remote sensing images acquired in 2005,2011 and 2017 and UAV images in 2018 were used to visually interpret the land use types.The dynamic change and type conversion of land use in three periods were examined and the driving forces were explored.The results show that,from 2005 to 2011,new lakes(84.41 hm2)were added,and the most decreased area was farmland,which mainly transformed into xerophytic meadow and wet herbaceous swamp.From 2011 to 2017,a new type of mesophytic meadow(80.07 hm^(2))was added,which was mainly transformed from wet peat swamp,wet herbaceous swamp and xerophytic meadow.Most of the reduction was in farmland,which was mainly converted to xerophytic meadow.In a word,during the research period,the wetland types and areas of Dajiu Lake were increasing,the wetland landscape was restored to a certain extent,and the wetland ecological environment was improved.The analysis of driving forces shows that the establishment of Wetland Nature Reserve and a series of effective wetland ecological restoration projects are the main driving forces of land use change in Dajiu Lake wetland.The results of this study can provide reference and suggestions for wetland restoration and protection.
作者
胡苏李扬
李辉
顾延生
黄咸雨
张志麒
汪迎春
HU Suliyang;LI Hui;GU Yansheng;HUANG Xianyu;ZHANG Zhiqi;WANG Yingchun(China University of Geosciences(Wuhan), School of Geography and Information Engineering, Wuhan 430074, China;China University of Geosciences(Wuhan),Hubei Key Laboratory of Critical Zone Evolution, Wuhan 430074, China;Geological Surveying and Mapping Institute, Kunming 650000, China;State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan 430074, China;Hubei Key Laboratory of Wetland Evolution and Eco-Restoration(WEER), China University of Geosciences, Wuhan 430074, China;Shennongjia National Park Management Bureau, Shennongjia 442421, China)
出处
《国土资源遥感》
CSCD
北大核心
2021年第1期221-230,共10页
Remote Sensing for Land & Resources
基金
中国地质大学(武汉)“地学长江计划”核心项目“长江中游大九湖、洪湖湿地初级生产与有机碳埋藏”(编号:CUGCJ1806)资助。
关键词
神农架大九湖
高分辨率遥感影像
土地利用
湿地
驱动力
Shennongjia Dajiu Lake
high resolution remote sensing image
land use
wetland
driving forces
