Remote Sensing inversion of Classification and Stocking Volume of Tropical Virgin Forest Types Based on Multivariate Data

doi:10.13466/j.cnki.lyzygl.2019.02.006

Abstract

Abstract:

Study on the spatial distribution and inversion of forest ecosystem stocks play a crucial role in carbon stock estimation,biodiversity and global climate change research.However,due to the diversity of forest vegetation types,especially in tropical primary forest areas that are beyond the reach of human,forest survey data is missing,the estimates and inversions of forest stocks still present significant challenges.This study takes the tropical primitive rain forest area of 18.80 million ha in the West Syepik Province of Papua New Guinea as the study area,and uses the high-resolution remote sensing images of RapidEye,QuickBird and Landsat TM combining the field survey data to classify the land cover types in the study area.Based on the forest vegetation parameter information obtained by remote sensing image,the remote sensing inversion model of forest stock quantity is established in cooperation with the ground sample plot.The optimal inversion model is selected to estimate the forest stock volume,and combined with GIS technology to analyze the spatial distribution characteristics of the small class scale.The results show that the land cover types in the study area can be divided into low-altitude plain forests,low-altitude highland forests,low-mountain forests,sparse forests,swamp forests and other types,with a classification accuracy of 79.2%.The multivariate regression model R² of the stock volume remote sensing inversion model is 0.694,which has a good inversion accuracy for the forest stock volume.The distribution of forest stocks in the study area is characterized by a higher central area than the surrounding,northern and central eastern regions,which is significantly higher than the northwest and southeast regions,which corresponds to the distribution of land cover types in the study area.The forest stock inversion model used has important reference value for the estimation of forest resource stocks in tropical forest areas.

Key words: remote sensing image, forest volume, inversion model, spatial distribution, tropical primary forest areas

CLC Number:

S771

CHEN Xinyun, LI Liwei, LIU Chengfang, WANG Liuru, DING Jing. Remote Sensing inversion of Classification and Stocking Volume of Tropical Virgin Forest Types Based on Multivariate Data[J]. FOREST RESOURCES WANAGEMENT, 2019, (2): 39-46.

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一级类型	二级类型
低海拔平原森林	中大树冠森林
	稀疏树冠森林
	小树冠森林
	巴拉斯榄仁树林
低海拔高地森林	大树冠森林
	中树冠森林
	小树冠森林
低山森林	小树冠森林
	小树冠针叶林
稀疏森林
沼泽森林
其它类型

土地覆盖类型	面积/万hm	比例/%	样地数/个
低海拔高地森林	7.52	40.01	33
低海拔平原森林	4.76	25.30	20
沼泽森林	3.16	16.82	14
低山森林	1.16	6.20	6
稀疏森林	1.15	6.09	6
其它类型	1.05	5.58	—
合计	18.80	100.00	79

因子类型	建模因子	来源
波段反射率值	Band1,Band2,Band3,Band4,Band5,Band7	RapidEye,QuickBird,Landsat TM
波段运算	NDVI,EVI,SAVI,MSAVI,NDMI	RapidEye,QuickBird,Landsat TM
主成分	PCA1,PCA2,PCA3
地形数据	Aspect,Slope,Elevation	DEM

类型	总面积		总蓄积		公顷蓄积/(m³/ hm²)
类型	面积/万hm²	比例/%	蓄积/万m³	比例/%	公顷蓄积/(m³/ hm²)
低海拔平原森林	4.76	25.3	1504	35.35	316.1
低海拔高地森林	7.52	40.01	2062	48.49	274.2
低山森林	1.16	6.2	255	5.98	218.5
稀疏森林	1.15	6.09	105	2.46	91.3
沼泽森林	3.16	16.82	328	7.72	103.9
其它类型	1.05	5.58	—	—	—
合计	18.80	100.00	4254	100.00	239.6

建模因子	Pearson相关性	建模因子	Pearson相关性
Band 2	-0.456^**	NDMI	0.074
Band 3	-0.464^**	SAVI	0.388^**
Band 5	-0.083	MSAVI	0.382^**
Band 7	-0.270^*	Elevation	0.035
Slope	0.055	Aspect	0.307^**