Research on Inversion of Water Conservation Distribution of Forest Ecosystem in Alpine Mountain Based on Spectral Features

Teng NIU; Jie LU; Jia-xin YU; Ying-da WU; Qian-qian LONG; Qiang YU

doi:10.3964/j.issn.1000-0593(2022)02-0530-07

Spectroscopy and Spectral Analysis, Volume. 42, Issue 2, 530(2022)

Research on Inversion of Water Conservation Distribution of Forest Ecosystem in Alpine Mountain Based on Spectral Features

Teng NIU^{1、1; 3;}, Jie LU^{1、1; 2; *;}, Jia-xin YU^4、4;, Ying-da WU^5、5;, Qian-qian LONG^3、3;, and Qiang YU^3、3;

Author Affiliations

¹1. Institute of Tibet Plateau Ecology, Tibet Agriculture & Animal Husbandry University, Linzhi 860000, China

³3. Beijing Key Laboratory of Precision Forestry, Beijing Forestry University, Beijing 100083, China

⁴4. Hutuohe State-Owned Forest Farm of Shijiazhuang Forestry Bureau, Shijiazhuang 050000, China

⁵5. Forest and Grassland Fire Fighting Research of China Fire and Rescue Institute, Beijing 102202, China

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Figures & Tables(9)

Fig. 1. Vegetation type and distribution location of sampling points

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Fig. 2. Schematic diagram of spectrometer measuring leaf spectrum

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Fig. 3. Reflectance spectrum curve of different vegetation leaves

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Fig. 4. First derivative spectral curve of different vegetation types
(a): First derivative spectral curve;(b): Reflectance spectrum trilateral parameters

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Fig. 5. Distribution of water conservation of forest ecosystem in Bayi district

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Fig. 6. Accuracy verification of water conservation forecast model
(a): Verification of picea likiangensis var. linzhiensis inversion accuracy; (b): Verification of Pimus densata inversion accuracy;(c): Verification of Quercus aquifolioides inversion accuracy; (d): Verification of Rhododendron nivale inversion accuracy

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Table 1. Vegetation water conservation(t·hm^-2)

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Table 1. Vegetation water conservation(t·hm^-2)

植被类型	林冠层截流量	枯落物持水量	土壤含水量	水源涵养总量
雪层杜鹃	13.54±1.35	13.51±2.39	158.69±10.21	185.74±12.21
林芝云杉	54.72±3.21	15.36±1.22	309.33±28.97	379.41±21.65
高山松	49.86±2.53	17.74±2.31	287.61±15.88	355.21±25.36
高山栎	30.33±5.68	23.69±1.11	450.97±31.74	504.99±42.11

Table 2. Correlation between vegetation reflectance spectrum and water conservation

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Table 2. Correlation between vegetation reflectance spectrum and water conservation

参数	描述	雪层杜鹃	林芝云杉	高山松	高山栎
R₄₀₀	紫光波段	0.359	0.246	0.355	0.329
R₄₄₀	蓝光波段	0.243	0.237	0.298	0.267
R₄₈₀	青光波段	0.341	0.339	0.356	0.374
R₅₄₀	绿光波段, 可见光绿峰	0.357	0.457^*	0.442^*	0.449^*
R₅₈₀	黄光波段	0.389	0.391	0.361	0.312
R₆₀₀	橙光波段	0.277	0.324	0.339	0.341
R₇₀₀	红光波段	0.167	0.258	0.22	0.303
SD_r	红边	0.293	0.287	0.258	0.212
SD_y	黄边	0.333	0.368	0.305	0.357
SD_b	蓝边	0.316	0.289	0.226	0.303
R_{1 450}	近红外波段水吸收带	-0.387	-0.355	-0.213	-0.372
R_{1 950}	中红外波段水吸收带	-0.454^*	-0.488^*	-0.571^*	-0.488^*
R_{3 450}	中红外波段水吸收带	-0.332	-0.371	-0.225	-0.301
NDWI	归一化水体指数	0.567^*	0.49^*	0.46^*	0.467^*
NDVI	归一化植被指数	0.487^*	0.471^*	0.459^*	0.466^*
LWI	叶面水含量指数	0.312	0.365	0.339	0.353

Table 3. Prediction model for water conservation capacity of different vegetation

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Table 3. Prediction model for water conservation capacity of different vegetation

植被类型	拟合模型
林芝云杉	W=981.24R₅₄₀-1 457.66R_{1 950}+792.29NDWI+506.25NDVI-502.38
高山松	W=803.77R₅₄₀-1 287.65R_{1 950}+578.92NDWI+743.11NDVI-556.67
高山栎	W=1 245.75R₅₄₀-530.45R_{1 950}+638.21NDWI+744.21NDVI-634.77
雪层杜鹃	W=-878.66R_{1 950}+754.37NDWI+375.92NDVI-366.86

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Teng NIU, Jie LU, Jia-xin YU, Ying-da WU, Qian-qian LONG, Qiang YU. Research on Inversion of Water Conservation Distribution of Forest Ecosystem in Alpine Mountain Based on Spectral Features[J]. Spectroscopy and Spectral Analysis, 2022, 42(2): 530

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Paper Information

Category: Research Articles

Received: Dec. 17, 2020

Accepted: Mar. 29, 2021

Published Online: Apr. 2, 2022

The Author Email:

DOI:10.3964/j.issn.1000-0593(2022)02-0530-07

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology

Table 1. Vegetation water conservation(t·hm-2)

Table 1. Vegetation water conservation(t·hm-2)

Table 2. Correlation between vegetation reflectance spectrum and water conservation

Table 2. Correlation between vegetation reflectance spectrum and water conservation

Table 3. Prediction model for water conservation capacity of different vegetation

Table 3. Prediction model for water conservation capacity of different vegetation

Table 1. Vegetation water conservation(t·hm^-2)

Table 1. Vegetation water conservation(t·hm^-2)