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基于多源遥感数据的福建省海岸带县域森林生态质量评价

闫谨, 周小成, 黄婷婷, 乐通潮, 王永荣, 吴善群

闫谨, 周小成, 黄婷婷, 乐通潮, 王永荣, 吴善群. 基于多源遥感数据的福建省海岸带县域森林生态质量评价[J]. 北京林业大学学报, 2024, 46(5): 12-25. DOI: 10.12171/j.1000-1522.20230200
引用本文: 闫谨, 周小成, 黄婷婷, 乐通潮, 王永荣, 吴善群. 基于多源遥感数据的福建省海岸带县域森林生态质量评价[J]. 北京林业大学学报, 2024, 46(5): 12-25. DOI: 10.12171/j.1000-1522.20230200
Yan Jin, Zhou Xiaocheng, Huang Tingting, Le Tongchao, Wang Yongrong, Wu Shanqun. Evaluation of forest ecological quality in coastal zone counties of Fujian Province, eastern China based on multi-source remote sensing data[J]. Journal of Beijing Forestry University, 2024, 46(5): 12-25. DOI: 10.12171/j.1000-1522.20230200
Citation: Yan Jin, Zhou Xiaocheng, Huang Tingting, Le Tongchao, Wang Yongrong, Wu Shanqun. Evaluation of forest ecological quality in coastal zone counties of Fujian Province, eastern China based on multi-source remote sensing data[J]. Journal of Beijing Forestry University, 2024, 46(5): 12-25. DOI: 10.12171/j.1000-1522.20230200

基于多源遥感数据的福建省海岸带县域森林生态质量评价

基金项目: 福建省林业科技攻关项目(2023FKJ02),福建省科技厅高校产学合作项目(2022N5008)。
详细信息
    作者简介:

    闫谨。主要研究方向:环境与资源遥感。Email:225520027@fzu.edu.cn 地址:350108福建省福州市闽侯县上街镇学院路2号福州大学旗山校区

    责任作者:

    周小成,博士,副研究员。主要研究方向:环境与资源遥感。Email:zhouxc@fzu.edu.cn 地址:同上。

  • 中图分类号: S771.8

Evaluation of forest ecological quality in coastal zone counties of Fujian Province, eastern China based on multi-source remote sensing data

  • 摘要:
    目的 

    森林生态质量是从生态角度反映森林质量的内涵,对森林的生态功能和生态服务、生长状况以及自我调节功能进行综合测度,以期提高森林改善生态环境、维护生态平衡的能力。

    方法 

    利用中、高分辨率多源遥感数据,获取大范围尺度下能表征森林生态质量的关键指标信息,在此基础上,分析福建省海岸带40个县域的森林生态质量状况。首先,基于2016年2 m分辨率多源遥感数据为主要数据源,利用双层尺度集模型选定最佳分割尺度,多分类器集成算法集,自动选择最优分类算法进行森林类型提取,并结合2020年Sentinel遥感数据及森林分类产品,更新2020年福建省海岸带森林类型精细分布图;其次,利用LandTrendr算法衍生的干扰开始时间特征推算现存森林年龄,通过GEDI冠层高度产品获取海岸带森林冠层高度分布图;在以上关键森林质量指标提取基础上,对遥感手段获取的8项森林生态质量评价指标进行主成分分析,获得福建省海岸带县域森林生态质量综合评价结果。

    结果 

    2020年福建海岸带40个县域约50%的县域森林生态质量处于优良水平,其中仙游县、闽侯县、南安市、霞浦县、柘荣县及厦门海沧区、思明区、集美区、同安区等森林生态质量为优;森林生态质量较差的县域有惠安县、秀屿区、石狮市、福安市、平潭实验区、诏安县。

    结论 

    结合中、高分辨率多源遥感数据,能够发挥遥感大范围监测优点,客观评价福建省海岸带40个县域的森林生态质量;研究结果表明2020年福建沿海县域森林生态质量还存在较大的提升空间,需要针对存在的问题采取相应森林管理措施提升森林生态质量。

    Abstract:
    Objective 

    Forest ecological quality reflects the ecological quality of forests from an ecological perspective, measuring the comprehensive capacity of forests to improve the ecological environment, maintain ecological balance, and provide ecological functions and services. Utilizing medium and high-resolution multisource remote sensing data, we aim to acquire crucial indicator information that characterizes forest ecological quality at a large-scale level. Based on this foundation, our objective is to analyze the forest ecological quality status in the 40 coastal counties of Fujian Province of eastern China.

    Method 

    Firstly, the primary data source utilized was 2 m resolution multisource remote sensing data. The bi-level scale-sets model (BSM) was employed to determine the optimal segmentation scale, integrating multiple classifiers to create an algorithm set. The best classification algorithm for forest type extraction was automatically selected. This approach was complemented by the use of Sentinel remote sensing data in 2020 and fine forest classification products, resulting in an optimized fine-scale distribution map of coastal forests in Fujian Province for year 2020. Secondly, forest age was estimated using disturbance onset time features derived from the LandTrendr algorithm. Additionally, GEDI crown height products were used to obtain the canopy height distribution map of coastal forests. Building upon the extraction of key forest quality indicators through remote sensing methods, a principal component analysis was conducted on eight forest ecological quality assessment indicators obtained through remote sensing. This led to a comprehensive assessment of forest ecological quality for the coastal counties of Fujian Province.

    Result 

    In 2020, approximately 50% of the 40 coastal counties in Fujian’s coastal zone exhibited a favorable level of forest ecological quality. Among them, Xianyou County, Minhou County, Nan’an City, Xiapu County, Zherong County, as well as the districts of Haicang, Siming, Jimei, and Tong’an in Xiamen, demonstrated excellent forest ecological quality. On the other hand, counties with relatively poor forest ecological quality included Huian County, Xiuyu District, Shishi City, Fu’an City, Pingtan Experimental Zone, and Zhao’an County.

    Conclusion 

    Utilizing high and medium-resolution multisource remote sensing data, the advantages of remote sensing large-scale monitoring have been leveraged to provide an objective assessment of the forest ecological quality in the 40 coastal counties of Fujian Province. The research findings reveal that there is considerable room for improvement in the forest ecological quality of the coastal counties in Fujian Province in 2020. Addressing the existing issues calls for the implementation of appropriate forest management measures to enhance the forest ecological quality.

  • 图  1   研究技术路线图

    Figure  1.   Research technology roadmap

    图  2   基于多源遥感数据的2020年福建海岸带森林类型分布提取结果

    Figure  2.   Extraction results of forest type distribution in Fujian Province coastal zone in 2020 based on multi-source remote sensing data

    图  3   2020年福建海岸带森林类型面积统计及森林覆盖率

    Figure  3.   Forest area statistics and forest coverage of coastal zone in Fujian Province in 2020

    图  4   福建海岸带森林干扰量级

    Figure  4.   Forest disturbance levels in Fujian Province coastal zone

    图  5   福建海岸带森林林龄空间分布

    Figure  5.   Spatial distribution of forest age in Fujian Province coastal zone

    图  6   GEDI 冠层高度验证

    Figure  6.   Verification of GEDI canopy height

    图  7   福建海岸带GEDI冠层高度分级

    Figure  7.   GEDI canopy height classification of Fujian Province coastal zone

    图  8   福建海岸带各县域森林生态质量综合指数

    Figure  8.   Comprehensive index of forest ecological quality by counties in Fujian Province coastal zone

    图  9   福建海岸带县域尺度森林生态质量等级分布

    Figure  9.   Distribution of forest ecological quality levels at the county level in the coastal zone of Fujian Province

    表  1   遥感影像数据介绍

    Table  1   Introduction of remote sensing image data

    卫星名称
    Satellite name
    空间分辨率
    Spatial resolution
    景数
    Scene number
    获取时间
    Access time
    资源三号 ZY-3 2.1 m (全色)
    2.1 m (panchromatic)
    5.8 m (多光谱)
    5.8 m (multispectral)
    30 2015年9月至2016年9月,以2016年度卫星影像为主
    September 2015 to September 2016, based on
    annual satellite imagery in 2016
    高分一号 GF-1 2 m (全色)
    2 m (panchromatic)
    8 m (多光谱)
    8 m (multispectral)
    19
    天绘一号 TH-1 2 m (全色)
    2 m (panchromatic)
    10 m (多光谱)
    8 m (multispectral)
    13
    Landsat5、Landsat7、Landsat8 30 m 每年约20 ~ 40景
    About 20−40 views per year
    1991—2020年7—10月
    July to October in 1991 to 2020
    下载: 导出CSV

    表  2   LandTrendr算法参数

    Table  2   Parameters of LandTrendr algorithm

    过程
    Step
    参数
    Parameter

    Value
    分割
    Segmentation
    核尺寸 Kernel size3
    最大分段数
    Maximum number of segmentation
    6
    噪声值 Noise level0.9
    恢复率阈值 Recovery rate threshold0.25
    最优模型比例 Optimal model ratio0.75
    滤波
    Filter
    1年植被覆盖损失阈值
    1 year vegetation cover loss threshold
    10
    10年植被覆盖损失阈值
    10 year vegetation cover loss threshold
    3
    干扰前覆盖阈值
    Pre-interference coverage threshold
    20
    植被生长比例阈值
    Threshold for percentage of vegetation growth
    5
    制图
    Mapping
    最小制图单位 Minimum mapping unit30 m
    下载: 导出CSV

    表  3   森林生态质量评价指标体系

    Table  3   Forest ecological quality evaluation index system

    指标
    Index
    森林生态质量评价指标含义
    Meaning of forest ecological quality assessment indicators
    计算方法
    Calculation method
    森林类型
    Forest type (X1)
    表征森林覆盖类型的均衡程度
    Characterizing the balance of forest cover types
    森林各类型面积与其区域面积比
    Proportion of area of each forest type in relation to
    its regional area
    森林覆盖率
    Forest coverage (X2)
    反映地区森林资源、林业发展状况及森林效益的综合性指标
    Comprehensive indicators reflecting regional forest resources,
    forestry development and forest benefits
    区域森林面积与其区域面积比值
    Ratio of regional forest area to its regional area
    龄级结构
    Age structure (X3)
    反映森林龄级的均衡水平
    Reflecting equilibrium level of forest age class
    各龄级与森林面积比值
    Ratio of age classes to forest area
    人工林比重
    Percentage of plantation (X4)
    反映森林资源造林活动的演替程度
    Reflecting the degree of succession of silvicultural
    activities on forest resources
    人工林面积与森林面积比值
    Ratio of plantation area to forest area
    人均森林面积
    Forest area per capita (X5)
    反映森林资源的人均占有量水平
    Reflecting the level of per capita occupancy of forest resources
    森林总面积与人口比值
    Ratio of total forest area to population
    林地利用率
    Forest land utilization rate (X6)
    反映林业用地的利用水平
    Reflecting the level of utilization of forestry land
    有林地面积与林业用地面积比值
    Ratio of forested land area to forest land area
    冠层高度
    Canopy height (X7)
    反映森林生长状况
    Reflecting forest growth condition
    各冠层高度面积与森林总面积比值
    Ratio of area of each canopy height to
    total forest area
    干扰量级
    Interference level (X8)
    反映森林受干扰的程度
    Reflecting the extent of forest disturbance
    不同干扰量级与干扰总面积比值
    Ratio of different interference levels to
    total interference area
    下载: 导出CSV

    表  4   福建海岸带森林类型遥感分类结果精度验证

    Table  4   Validation of the accuracy of forest classification results in the coastal zone of Fujian Province

    地区
    Region
    精度
    Accuracy
    人工地表
    Artificial
    surface
    耕地
    Plow
    land
    迹地
    Trails
    有林地
    Woodland
    果园
    Orchard
    茶园
    Tea
    plantation
    水体
    Waters
    红树林
    Mangrove
    总体精度
    Overall
    accuracy/%
    Kappa系数
    Kappa
    coefficient
    宁德市
    Ningde City
    PA/% 94.12 91.89 88.89 92.86 88.46 88.24 95.83 91.11 0.89
    UA/% 91.43 82.93 92.31 94.20 85.19 91.84 95.83
    F 92.75 87.18 90.57 93.53 86.79 90.00 95.83
    福州市
    Fuzhou City
    PA/% 92.31 88.10 89.74 96.25 88.24 87.10 97.37 92.71 0.91
    UA/% 85.71 86.05 94.59 95.06 93.75 93.10 97.37
    F 88.89 87.06 92.11 95.65 90.91 90.00 97.37
    莆田市
    Putian City
    PA/% 92.31 94.00 91.67 92.31 85.71 87.18 94.87 91.51 0.89
    UA/% 96.00 94.00 91.67 88.89 85.71 89.47 97.37
    F 94.12 94.00 91.67 90.57 85.71 88.31 96.10
    泉州市
    Quanzhou City
    PA/% 89.13 93.88 85.71 91.30 86.11 84.62 96.30 93.33 90.20 0.88
    UA/% 95.35 85.19 92.31 95.45 86.11 81.48 92.86 87.50
    F 92.13 89.32 88.89 93.33 86.11 83.02 94.55 90.32
    厦门市
    Xiamen City
    PA/% 89.19 91.67 90.91 93.88 83.33 92.31 96.00 91.96 0.90
    UA/% 91.67 91.67 90.91 93.88 88.24 92.31 92.31
    F 90.41 91.67 90.91 93.88 85.71 92.31 94.12
    漳州市
    Zhangzhou City
    PA/% 93.18 93.33 91.67 93.65 87.10 87.23 91.67 93.75 91.32 0.90
    UA/% 93.18 91.80 91.67 92.19 88.52 89.13 93.62 90.91
    F 93.18 92.56 91.67 92.91 87.80 88.17 92.63 92.31
    注:PA、UA、F分别代表生产者精度、用户精度和F统计量。Notes: PA, UA, and F represent producer accuracy, user accuracy, and F statistic, respectively.
    下载: 导出CSV

    表  5   森林生态质量评价指标Pearson相关系数

    Table  5   Pearson correlation coefficients of forest ecological quality evaluation indicators

    指标
    Index
    平均值
    Average value
    标准差
    Standard deviation
    X1 X2 X3 X4 X5 X6 X7 X8
    X1 0.794 0.269 1
    X2 0.556 0.329 −0.657** 1
    X3 0.569 0.216 −0.039 −0.13 1
    X4 0.325 0.178 −0.058 0.156 −0.241 1
    X5 0.225 0.233 −0.643** 0.821** −0.119 −0.028 1
    X6 0.795 0.276 0.524** −0.485** −0.044 0.001 −0.475** 1
    X7 0.578 0.271 0.414** −0.830** 0.005 −0.041 −0.736** 0.207 1
    X8 0.209 0.236 −0.558** 0.689** −0.064 0.194 0.559** −0.29 −0.571** 1
    注:* P < 0.05 ,** P < 0.01。Notes: * P < 0.05 ,** P < 0.01.
    下载: 导出CSV

    表  6   线性组合系数及权重结果

    Table  6   Results of linear combination coefficients and weights

    名称NameY1Y2Y3Y4综合得分系数
    Composite score coefficient
    权重
    Weight/%
    X10.29290.52200.083 0.08920.284613.92
    X20.49350.28240.08750.10210.321815.74
    X30.026 0 0.02500.12890.96890.18238.92
    X40.02770.00330.93210.13540.17838.72
    X50.45340.31460.13970.14750.326015.95
    X60.08270.72080.02800.00020.214110.48
    X70.52950.00810.04850.01690.254012.43
    X80.42010.16880.27830.05060.283113.85
    特征根 Eigenvalue3.1491.6431.0691.027
    方差解释率
    Variance explaination rate/%
    39.3720.5413.3712.84
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-08-22
  • 修回日期:  2023-11-06
  • 网络出版日期:  2024-04-27
  • 刊出日期:  2024-05-19

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