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Remote Sensing for Natural Resources    2021, Vol. 33 Issue (3) : 211-218     DOI: 10.6046/zrzyyg.2020286
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Ecological vulnerability assessment of the Yellow River basin based on partition-integration concept
YANG Wenna1,2(), ZHOU Liang1,3,4(), SUN Dongqi3
1. Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China
2. National-Local Joint Engineering Research Center of Technologies and Applications for National Geographic State Monitoring, Lanzhou 730070, China
3. Institute of Geographic Sciences and Natural Resources Research/State Key Laboratory of Resources and Environment Information System, Beijing 100101, China
4. Gansu Provincial Engineering Laboratory for National Geographic State Monitoring, Lanzhou 730070, China
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Abstract  

The Yellow River basin is an important ecological safety barrier, an agglomeration area of resource and energy, and an area with highly intensive production activities in China. Therefore, its ecological change directly affects the sustainable development of the ecological environment and economy in the basin. This paper aims to quantitatively assess the ecological vulnerability and analyze the spatial heterogeneity in the Yellow River basin. To this end, an evaluation system was established using the partition-integration assessment method by selecting indicators such as water resources, climate, soil, vegetation, and human activities. Meanwhile, a multiplication model was introduced. The assessment results are as follows. The overall ecological environment in the basin is moderately vulnerable, with moderately vulnerable areas accounting for 42.37% of the total area of the basin. Meanwhile, the areas with a highly vulnerable ecological environment in the basin are mainly distributed in the urban economic belt along the upper mainstream of the Yellow River. From 2000 to 2018, the ecological vulnerability of the basin first decreased and then increased. During this period, ecological problems were the most notable in 2000 and ecological vulnerability was the lowest in 2015, with the Comprehensive Vulnerability Index (CVI) of 2.28 and 2.00, respectively in 2000 and 2015. The ecological vulnerability and its evolution trend in the basin significantly varied in space. In detail, the ecological vulnerability notably increased in the plateau areas in the upper reaches, slightly changed in the urban belt along the river, and significantly decreased in the middle and lower reaches.

Keywords partition-integration      ecological vulnerability      spatial difference      sustainable development      Yellow River basin     
ZTFLH:  TP79  
Corresponding Authors: ZHOU Liang     E-mail: yangwennaleo10@163.com;zhougeo@126.com
Issue Date: 24 September 2021
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Wenna YANG
Liang ZHOU
Dongqi SUN
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Wenna YANG,Liang ZHOU,Dongqi SUN. Ecological vulnerability assessment of the Yellow River basin based on partition-integration concept[J]. Remote Sensing for Natural Resources, 2021, 33(3): 211-218.
URL:  
https://www.gtzyyg.com/EN/10.6046/zrzyyg.2020286     OR     https://www.gtzyyg.com/EN/Y2021/V33/I3/211
Fig.1  Location of Yellow River Basin
Fig.2  Zoning plan for the Yellow River Basin
一级指标 二级指标 权重/%
Ⅰ区 Ⅱ区 Ⅲ区
年降水量 1.30 3.30 2.98
水资源总量 2.23 8.50 7.32
河网密度 0.16 0.38 0.60
水流速率*① 1.20 5.16 8.10
气候 年积温(≥10°C) 7.47 0.34 0.92
湿润指数 2.40 5.15 4.97
日照时数 1.36 2.53 1.50
极端降水* 5.22 13.92 8.48
一级指标 二级指标 权重/%
Ⅰ区 Ⅱ区 Ⅲ区
土壤 黏土含量 0.14 0.45 0.39
砂土含量* 0.10 0.54 0.37
富水能力 2.38 3.65 4.52
植被 生物多样性指数 0.27 0.44 1.32
森林覆盖度 3.28 8.27 10.03
草地覆盖度 0.19 0.20 0.90
人类活动 人口密度* 19.49 14.48 14.01
GDP密度* 34.97 21.83 15.05
路网密度* 3.83 1.73 2.79
建设用地强度* 14.00 9.14 15.74
Tab.1  Ecological vulnerability assessment system of the Yellow River Basin
脆弱性等级 脆弱性阈值
高原寒区 干旱过渡区 季风气候区
轻度脆弱 (0,0.14] (0,0.24] (0,0.30]
中度脆弱 (0.14,0.20] (0.24,0.31] (0.30,0.40]
重度脆弱 (0.20,0.31] (0.31,0.40] (0.40,0.51]
极度脆弱 (0.31,1] (0.40,1] (0.51,1]
Tab.2  Ecological vulnerability threshold of each ecological zone in the Yellow River Basin
Fig.3  Distribution of ecological vulnerability in the Yellow River Basin
Fig.4  Ecological vulnerability assessment results of the Yellow River Basin of each year
Fig.5  Changes in the ecological vulnerability of the Yellow River Basin (2000—2018)
Fig.6  Proportion of ecological vulnerability grades in the Yellow River Basin in each year
Fig.7  Proportion of ecological vulnerability grades in each ecological zone of the Yellow River Basin
一级指标 二级指标 Avg Sd PPMC
年降水量 0.328 0.148 -0.153
水资源总量 0.210 0.157 -0.345
河网密度 0.564 0.117 0.026
水流速率 0.901 0.993 0.137
气候 年积温(≥10 °C) 0.557 0.282 -0.242
湿润指数 0.264 0.149 -0.528
日照时数 0.473 0.155 0.072
极端降水 0.182 0.169 0.455
土壤 黏土含量 0.351 0.121 -0.110
砂土含量 0.522 0.137 0.096
富水能力 0.321 0.224 -0.085
植被 生物多样性指数 0.487 0.216 -0.300
森林覆盖度 0.058 0.111 -0.159
草地覆盖度 0.254 0.102 -0.016
人类活动 人口密度 0.016 0.028 0.427
GDP密度 0.009 0.022 0.381
路网密度 0.351 0.207 0.444
建设用地强度 0.043 0.058 0.479
Tab.3  Pearson coefficient between ecological vulnerability and evaluation index
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