摘要
针对现有方法无法准确提取削山造地范围以及定量评价削山造地区域生态变化问题,由此提出了基于三维地形变化的削山造地范围提取方法;同时,基于1991、2001、2009和2016年遥感影像,以绿度、湿度、热度和干度指标构建遥感生态指数(Remote Sensing Ecological Index,RSEI),对比分析4个时期生态质量时空变化。结果表明:RSEI不仅能够定量反映生态环境质量,而且可以空间化可视化。1991—2016年,兰州市周边削山造地工程面积不断增加,RSEI值由1991年的0.297上升至2016年的0.406,兰州市生态环境质量整体呈上升趋势,但是具有明显的空间差异。生态变差区域集中在兰州主城区北部山区、兰州新区东南部的削山造地工程范围,削山造地工程致使建筑用地和裸土地激增,植被覆盖度降低,表明削山造地工程对区域生态环境质量有一定影响,因此应该控制削山造地工程规模,加强保护生态脆弱区域环境。
To solve the problem that the existing methods cannot accurately extract the land creation region and quantitatively assess the ecological change of the land creation region,This paper proposed a method to extract the land creation region based 3D terrain change.Based on the remote sensing images of 1991,2001,2009 and 2016,the Remote Sensing Ecological Index(RSEI)was established based on the indexes of greenness,humidity,heat and dryness.The results showed that RSEI can not only quantitatively reflect the quality of ecological environment,but also can be spatially visualized.From 1991 to 2016,the area of land creation region continued to increase.The RSEI increased from 0.297 in 1991 to 0.406 in 2016.The overall ecological environmental quality of Lanzhou was an upward trend,but it had obvious spatial difference.The ecological deterioration areas were concentrated in land creation region of the northern mountainous area of Lanzhou and the southeast of Lanzhou New Area.The land creation project resulted in the expansion of built-up land and bare land,and the decrease of vegetation coverage.It indicated that the land creation project has a certain impact on the regional quality of ecological environment.Therefore,we should control the scale of land creation project,and protect the environment of fragile ecological region.
作者
高小龙
闫浩文
王桂钢
白建荣
Gao Xiaolong;Yan Haowen;Wang Guigang;Bai Jianrong(Faculty of Geomatics,Lanzhou Jiaotong University,Lanzhou 730070,China;National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring,Lanzhou 730070,China;Gansu Provincial Engineering Laboratory for National Geographic State Monitoring,Lanzhou 730070,China;Mapping Institutiion of Gansu province,Lanzhou 730000,China)
出处
《遥感技术与应用》
CSCD
北大核心
2022年第4期1012-1020,共9页
Remote Sensing Technology and Application
基金
国家重点研发计划项目(2017YFB0504203)
甘肃省自然资源科技项目资助
关键词
遥感生态指数
削山造地
地表覆盖
Remote sensing ecological index
Land creation
Land cover
作者简介
高小龙(1989-),男,甘肃通渭人,高级工程师,主要从事遥感应用研究。E‐mail:381940392@qq.com;通讯作者:闫浩文(1977-),男,甘肃民勤人,教授,主要从事地图自动综合和空间方向关系研究。E‐mail:58391794@qq.com
