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基于DEM与太阳辐射的北京市山地坡向提取方法研究

闫明 刘鹏举 蒋育昊 张英凯 孙丽

闫明, 刘鹏举, 蒋育昊, 张英凯, 孙丽. 基于DEM与太阳辐射的北京市山地坡向提取方法研究[J]. 北京林业大学学报, 2018, 40(1): 67-73. doi: 10.13332/j.1000-1522.20170311
引用本文: 闫明, 刘鹏举, 蒋育昊, 张英凯, 孙丽. 基于DEM与太阳辐射的北京市山地坡向提取方法研究[J]. 北京林业大学学报, 2018, 40(1): 67-73. doi: 10.13332/j.1000-1522.20170311
Yan Ming, Liu Peng-ju, Jiang Yu-hao, Zhang Ying-kai, Sun Li. Extraction method of slope aspect based on DEM and solar radiation in mountain area of Beijing[J]. Journal of Beijing Forestry University, 2018, 40(1): 67-73. doi: 10.13332/j.1000-1522.20170311
Citation: Yan Ming, Liu Peng-ju, Jiang Yu-hao, Zhang Ying-kai, Sun Li. Extraction method of slope aspect based on DEM and solar radiation in mountain area of Beijing[J]. Journal of Beijing Forestry University, 2018, 40(1): 67-73. doi: 10.13332/j.1000-1522.20170311

基于DEM与太阳辐射的北京市山地坡向提取方法研究

doi: 10.13332/j.1000-1522.20170311
基金项目: 

中央级公益性科研院所基本科研业务费专项 IFRIT201502

详细信息
    作者简介:

    闫明。主要研究方向:地理信息系统开发与应用。Email:yanming0528@126.com  地址:100091 北京市海淀区香山路东小府1号中国林业科学研究院资源信息研究所

    责任作者:

    刘鹏举,副研究员。主要研究方向:林业GIS应用与开发。Email:liupeng@caf.ac.cn 地址:同上

  • 中图分类号: S718.51+1

Extraction method of slope aspect based on DEM and solar radiation in mountain area of Beijing

  • 摘要: 目的坡向是描述地形的重要因子,基于DEM提取坡向对于自然生境分析与地理生态过程模拟具有重要意义。同时,由于山地地形复杂,坡面太阳辐射受地形遮挡影响很大。本文基于DEM与太阳辐射研究山地坡向提取方法,既保持了DEM计算山地坡向的客观性,又能和坡面阴阳属性保持良好的一致性,为山地气象、土壤分布、立地条件、适宜性分析等有关研究奠定基础。方法以DEM数字地形分析技术为基础,应用基于DEM的太阳辐射分析模型,探究太阳辐射量与坡向、坡度和海拔之间的关系,建立北京地区太阳辐射参考模型,并计算样地点标准太阳辐射;依据样地点DEM计算太阳辐射与标准太阳辐射推导出太阳辐射等效坡向。结果以北京市一类清查数据山区的2 000个样地点为测试数据,将30、60、90、120、150、200 m空间分辨率的DEM计算坡向作为评判标准,建立太阳辐射参考模型,其中1 398个样地点的DEM计算太阳辐射与标准太阳辐射差异小于5%,太阳辐射等效坡向与30 m空间分辨率DEM计算坡向保持一致,占全部样地点69.9%;602个样地点受地形遮挡较大,依据太阳辐射参考模型计算进行调整,调整后其中583个样地点的太阳辐射等效坡向与评判标准一致。结论与一类清查人工测量坡向的比较表明:测试数据中样地点的太阳辐射等效坡向与评判标准一致性达到99.05%,而测试数据中样地点的人工测量坡向与评判标准一致性为72.05%。因此,依据本文方法推导出的太阳辐射等效坡向能反映出实际太阳辐射的信息,推导的坡向科学实用,为森林资源调查、立地分析等研究与生产提供了坡向获取的新方法。

     

  • 图  1  实验区示意图

    Figure  1.  Schematic diagram of study area

    图  2  年太阳辐射量与坡度关系图

    Figure  2.  Diagram of relationship between annual solar radiation and slope degree

    图  3  年太阳辐射量与坡向关系图

    Figure  3.  Diagram of relationship between annual solar radiation and slope aspect

    图  4  年太阳辐射量与海拔关系图

    Figure  4.  Diagram of relationship between annual solar radiation and altitude

    图  5  基于太阳辐射的坡向划分流程

    Figure  5.  Flowchart for slope aspect-dividing based on solar radiation

    表  1  年太阳辐射量公式相关系数表

    Table  1.   Correlation coefficients of annual solar radiation formula

    高程范围
    Elevation
    range/m
    系数k
    Coefficient k
    判定系数
    Determination
    coefficient (R2)
    50~100142.150.97
    100~150140.980.92
    150~200141.590.93
    200~250144.250.88
    250~300139.460.90
    300~350138.660.95
    350~400138.230.91
    400~450142.170.94
    450~500142.610.93
    500~550141.050.89
    550~600138.990.99
    600~650138.480.92
    650~700139.560.94
    700~750141.390.90
    750~800138.400.90
    800~850144.740.94
    850~900143.160.98
    900~950139.520.92
    950~1 000139.180.98
    1 000~1 050138.880.94
    1 050~1 100144.050.97
    1 100~1 150142.150.93
    1 150~1 200143.310.93
    1 200~1 250139.520.94
    1 250~1 300142.040.97
    1 300~1 350140.540.92
    1 350~1 400140.180.96
    1 400~1 450143.900.95
    1 450~1 500139.620.95
    1 500~1 550144.250.94
    1 550~1 600143.650.90
    1 600~1 650139.670.88
    1 650~1 700139.020.98
    1 700~1 750138.250.88
    1 750~1 800144.380.94
    1 800~1 850144.070.92
    1 850~1 900144.900.99
    1 900~1 950143.720.98
    1 950~2 000144.900.91
    2 000~2 050139.370.93
    2 050~2 100143.350.97
    2 100~2 150143.140.98
    2 150~2 200143.560.88
    2 200~2 250140.180.96
    2 250~2 300138.770.89
    2 300~2 350138.240.97
    下载: 导出CSV
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出版历程
  • 收稿日期:  2017-09-04
  • 修回日期:  2017-12-08
  • 刊出日期:  2018-01-01

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