Optimal Statistical Unit for Relief Amplitude in Southwestern China

ZHONG Jing; LU Tao

doi:10.13961/j.cnki.stbctb.2018.01.031

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Optimal Statistical Unit for Relief Amplitude in Southwestern China

- Optimal Statistical Unit for Relief Amplitude in Southwestern China
- Bulletin of Soiland Water Conservation Vol. 38, Issue 1, Pages: 175-181(2018)
- 作者机构：
  
  1. 中国科学院成都生物研究所, 中国科学院山地生态恢复与生物资源利用重点实验室, 生态恢复与生物多样性保育四川省重点实验室,四川,成都,610041
  2. 中国科学院大学,北京,100049
- 作者简介：
- 基金信息：
- DOI：10.13961/j.cnki.stbctb.2018.01.031
  CLC：
- Published：2018
- 稿件说明：
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ZHONG Jing, LU Tao. Optimal Statistical Unit for Relief Amplitude in Southwestern China[J]. Bulletin of Soiland Water Conservation, 2018, 38(1): 175-181.
DOI：

ZHONG Jing, LU Tao. Optimal Statistical Unit for Relief Amplitude in Southwestern China[J]. Bulletin of Soiland Water Conservation, 2018, 38(1): 175-181. DOI： 10.13961/j.cnki.stbctb.2018.01.031.

摘要

[目的

]

确定中国西南地区地形起伏度的最佳分析尺度并进行地形分级，明确区域地形结构特点并进行地貌结构划分。[方法

]

以ASTER GDEMv2数据为基础，通过Python模块编程，利用窗口分析方法提取西南地区各典型地貌以及整个区域n×n（n=2，3，4，…，181，182，183）窗口下的平均地形起伏度，进而采用均值变点分析方法确定最佳统计窗口。[结果

]

①西南地区地形起伏度的最佳分析尺度为2.43 km

；②区域地形起伏度以中小起伏为主，其中小起伏（200~500 m）占38.68%，中起伏（500~1 000 m）占23.58%；③从空间分布来看，西南地区的地形起伏度呈现中部高，东南部次之，西北部和东北部较低的特征。[结论

]

以2.43 km

为最佳统计窗口提取的西南地区地形起伏度符合区域地形起伏特征，同时较好地兼顾了各地貌类型的起伏特点。

Abstract

[Objective] The objective of this article is to determine the best statistical unit to extract and classify the relief amplitude of Southwestern China

and then the characteristics of the amplitude structure and the classification of geomorphologic structure can be determined.[Methods] Based on ASTER GDEMv2 data and through Python module programming

the average relief amplitude in the Southwestern China and the typical experimental areas was extracted at n×n windows (n=2

…

181

182

183)

and the best window area was calculated by the mean change point method.[Results] ① 2.43 km2 was the optimal statistical unit for extracting amplitude relief in the study area. ② Fluctuation of terrain was moderate and low in the study area

with the relief amplitude between 200 m to 500 m having the highest proportion (38.68%)

and that between 500 m to 1 000 m accounting for 23.58%. ③ As for the spatial distribution

the relief amplitude of the middle region was generally higher than that of other regions

followed by the southeast

lower in the northwest and northeast.[Conclusion] The method

computing relief amplitude with optimum statistical unit of 2.43 km2

conformed to the regional terrain characteristics and balanced the various landform types.

关键词

Keywords

references

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