基于机器学习的沟谷地貌识别模型对比——以黄土高原典型流域为例

范天程; 汪珍亮; 李云飞; 贾云飞; 袁可; 赵建林

doi:10.13870/j.cnki.stbcxb.2023.04.026

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基于机器学习的沟谷地貌识别模型对比——以黄土高原典型流域为例

更新时间：2025-03-12

- 基于机器学习的沟谷地貌识别模型对比——以黄土高原典型流域为例
- Comparing the Performance of Machine Learning Models for Identifying Gully Landforms-A Case Study of a Typical Watershed on the Chinese Loess Plateau
- 水土保持学报 2023年37卷第4期页码：205-213
- 作者机构：
  
  长安大学地质工程与测绘学院,西安,710054
- 作者简介：
  
  [ "范天程(1997-),男,硕士研究生,主要从事地貌遥感研究。E-mail:2020226008@chd.edu.cn" ]
- 基金信息：
  
  国家自然科学基金项目(41907048);中央高校基本科研费专项(300102260206)
- DOI：10.13870/j.cnki.stbcxb.2023.04.026
  中图分类号： P208
- 纸质出版：2023
- 稿件说明：
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范天程, 汪珍亮, 李云飞, 等. 基于机器学习的沟谷地貌识别模型对比——以黄土高原典型流域为例[J]. 水土保持学报, 2023,37(4):205-213.

FAN Tiancheng, WANG Zhenliang, LI Yunfei, et al. Comparing the Performance of Machine Learning Models for Identifying Gully Landforms-A Case Study of a Typical Watershed on the Chinese Loess Plateau[J]. 2023, 37(4): 205-213.
范天程, 汪珍亮, 李云飞, 等. 基于机器学习的沟谷地貌识别模型对比——以黄土高原典型流域为例[J]. 水土保持学报, 2023,37(4):205-213. DOI： 10.13870/j.cnki.stbcxb.2023.04.026.

FAN Tiancheng, WANG Zhenliang, LI Yunfei, et al. Comparing the Performance of Machine Learning Models for Identifying Gully Landforms-A Case Study of a Typical Watershed on the Chinese Loess Plateau[J]. 2023, 37(4): 205-213. DOI： 10.13870/j.cnki.stbcxb.2023.04.026.

摘要

探索沟谷地貌空间分布与环境控制特征之间的联系并构建沟谷地貌准确提取模型

对大尺度范围沟谷提取具有重要意义。基于人工提取黄土高原典型流域沟谷地貌样本

结合不同时期的Landsat8 OLI影像数据和DEM数据

建立随机森林模型确定黄土高原沟谷地貌提取最佳影像时期和最佳组合特征

基于最优模型参数

对比其与支持向量机和人工神经网络沟谷提取模型效果

验证模型泛化能力。结果表明:(1)黄土高原沟谷提取的最佳影像时期为12月

最佳组合特征集为Red、Blue、H、SWIR1、PNT、Coastal、GLCM4和NIR;(2)3种方法提取测试区域的沟谷空间分布一致

从定性和定量角度进行比较

随机森林模型提取效果最好

验证样区平均总体精度为80.48％

相较于支持向量机模型和人工神经网络模型分别提高4.00和8.63个百分比;(3)测试区域中

沟谷地貌面积约占总面积的56.91％

且呈现西北至东南方向逐渐集中的特点。研究表明随机森林模型在黄土高原地区高精度沟谷地貌识别研究中综合表现最佳

可大范围推广。

Abstract

Exploring the relationship between spatial distribution and environmental control characters of gully landforms and building accurate extraction model are of great significance for gully landforms extraction in large scale. Based on the artificial extraction of gully landform samples combing with Landsat8 OLI image data with different periods of and DEM data of a typical watershed on the Chinese loess plateau

the random forest model was established to determine the best period for gully landforms extraction and the best combination of gullying features. Then

combined with the optimal model parameters

results of random forest were compared with support vector machine and artificial neural network model to validate the model generalization ability. Our results showed that: (1) The best image period for gully extraction was in December

and the best combination feature set was Red

Blue

elevation (H)

SWIR1

positive and negative terrain (PNT)

Coastal

texture (GLCM4) and NIR; (2) The distribution of gully landforms in the testing area extracted by three methods had consistently spatial pattern. Based on qualitatively and quantitatively modelling performance

the random forest model presented the best extracting performance

with the average overall accuracy of 80.48%

which was higher by 4.00 percentage and 8.63 percentage compared with the support vector machine model and the artificial neural network model

respectively; (3) The gully landforms accounted for 56.91% of the total testing area and the distribution of gullies in testing area was gradually concentrated from northwest to southeast. The results show that the random forest model has the best comprehensive performance in the study of high-precision gully landforms identification on the Chinese Loess Plateau

and can be widely extended.

关键词

Keywords

references

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