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Remote Sensing for Natural Resources    2024, Vol. 36 Issue (1) : 227-234     DOI: 10.6046/zrzyyg.2022369
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Analyzing the comprehensive evolutionary characteristics of the ecological environment in the Bayin River basin based on Landsat data
WU Bingjie(), WEN Guangchao(), ZHAO Meijuan, XIE Hongbo, FENG Yajie, JIA Lin
Insitute of Resources & Environment, Henan Polytechnic University, Jiaozuo 454000, China
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Abstract  

This study aims to provide a guide for the optimal management of land use and ecological environment in the Bayin River basin or similar areas by revealing the comprehensive evolution characteristics of the ecological environment in the Bayin River basin. Based on the 12 scenes of remote sensing image data from 2005 to 2020, this study quantitatively explored the critical factors influencing the ecological environment in the study area using a geographical detector. By combining the model for integrated valuation of ecosystem services and trade-offs (InVEST), this study established an ecological environment quality assessment model through statistical analysis, overlay analysis, and analytic hierarchy process, revealing the comprehensive evolutionary characteristics of the ecological environment in the basin. The results show that: ① The critical factors influencing the ecological environment quality in the basin included population size, GDP, elevation, and rainfall. The comprehensive assessment value of the ecological environmental quality in the basin increased from 0.455 to 0.533, suggesting an overall upward trend; ② The ecological environmental quality in the basin exhibited significant regional differences. Specifically, 14.9% of the basin manifested degraded ecological environmental quality, primarily distributed in the vicinity of the Bayin River basin and the surrounding area of Delingha City. In contrast, 33.6% displayed improved ecological environmental quality, spreading in areas to the south of lakes in the middle and lower reaches of the Bayin River basin. This study indicates that the future ecological environment protection and planning in the Bayin River basin should focus on the balance between agricultural land and other ecological and construction land during urbanization, thereby achieving coordinated development of economy and ecology through scientific planning of spatial framework.
Keywords Bayin River basin      geographic detector      InVEST model      ecological environment quality      spatio-temporal evolution     
ZTFLH:  TP79  
Issue Date: 13 March 2024
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Bingjie WU
Guangchao WEN
Meijuan ZHAO
Hongbo XIE
Yajie FENG
Lin JIA
Cite this article:   
Bingjie WU,Guangchao WEN,Meijuan ZHAO, et al. Analyzing the comprehensive evolutionary characteristics of the ecological environment in the Bayin River basin based on Landsat data[J]. Remote Sensing for Natural Resources, 2024, 36(1): 227-234.
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https://www.gtzyyg.com/EN/10.6046/zrzyyg.2022369     OR     https://www.gtzyyg.com/EN/Y2024/V36/I1/227
Fig.1  Schematic diagram of the location of the Bayin River basin
数据名称 数据来源 空间分
辨率/m		 备注
Landsat数据 美国陆地资源卫星(http://glovis.usgs.gov/) 30 2005年、2010年、2015年、2020年7—9月共12景
DEM数据 地理空间数据云(http://www.gscloud.cn/) 90 若干幅DEM数据
气象数据 中国气象数据分享平台(www.cma.gov.cn) — 2005—2020年逐月气象数据
人口、经济等数据 《海西州统计年鉴》《青海统计年鉴》 — 2005—2020年
Tab.1  Data sources
不同地貌单元 生态环境问题
北部高山区域 主要由于气温升高等气候因素变化,北部高山区域冰川及永久性积雪融化,减少固体水源储存量,同时导致土地利用类型的裸地、草地、冰川等发生改变
中部冲洪积扇区域 中部主要是宗务隆山脉所在区域,区内由于气候因素、地质条件改变,草地、林地等土地利用类型、植被覆盖度发生变化
南部湖泊水体聚集的盆地区 南部区域主要为巴音河流域、柯鲁克湖、托素湖、尕海湖等水体聚集区,同时也是人类活动的主要区域,由于农业种植、牧业发展、水库枢纽工程建设、工业园建设、制碱业发展等生产生活活动,区内土地利用类型改变、土地沙化、土地荒漠化、湖泊水体面积缩减、植被覆盖度改变等生态环境问题
Tab.2  Ecological and environmental problems under different geomorphic units
地类
名称		 生境
适宜度		 威胁因子
耕地 建设
用地		 河流 盐碱地 戈壁
河流 0.7 1 0.3 0 0.2 0.5
冰雪 0.4 0.1 0.2 0.7 0 0.2
滩涂 0.2 0.1 0 0.5 0 0.3
盐碱地 0.3 0.4 0.7 0.3 0 0.2
建设用地 0 0 0 0 0.3 0.2
耕地 0.3 0 0 0 0.2 0.2
戈壁 0.2 0 0 0 0.3 0
裸地 0.3 0 0 0 0.2 0.1
草地 0.8 0.8 0.4 0.8 0.6 0.7
林地 1 0.5 0.5 0.8 0.5 0.5
Tab.3  Sensitivity scale of different types of land to threat factors
Fig.2  Geographical detector factor detection results
Fig.3  Evaluation of ecological environment quality in the study area from 2005 to 2020
Fig.4  Proportion of ecological environment quality grades in the study area from 2005 to 2020
Fig.5  Changes in ecological environment quality from 2005 to 2020
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