基于MODIS的泾河流域植被动态年际变化

doi:10.17521/cjpe.2007.0107

植物生态学报 ›› 2007, Vol. 31 ›› Issue (5): 850-856.DOI: 10.17521/cjpe.2007.0107

基于MODIS的泾河流域植被动态年际变化

王辉¹(), 昝国盛², 毕晓丽³, 周睿⁴, 熊友才¹, 洪军⁵, 葛剑平¹^,^*()

1 北京师范大学生命科学学院, 北京 100875
2 国家林业局调查与规划设计院, 北京 100714
3 中国科学院植物研究所, 北京 100093
4 云南大学生态学与地植物学研究所, 昆明 650091
5 农业部全国畜牧总站, 北京 100026

收稿日期:2006-06-23 接受日期:2006-09-08 出版日期:2007-06-23 发布日期:2007-09-30
通讯作者: 葛剑平
作者简介:* E-mail: gejp@bnu.edu.cn
E-mail: bnuwanghui.student@sina.com
基金资助:
国家重大基础研究规划项目(2002CB111507);国家科技攻关项目(2004BA508B2);国家自然科学基金资助项目(30270254)

MODIS-DETERMINED INTER-ANNUAL VEGETATION DYNAMICS IN JINGHE WATERSHED, CHINA

WANG Hui¹(), ZAN Guo-Sheng², BI Xiao-Li³, ZHOU Rui⁴, XIONG You-Cai¹, HONG Jun⁵, GE Jian-Ping¹^,^*()

¹College of Life Sciences, Beijing Normal University, Beijing 100875, China
²Academy of Forest Inventory and Planning, State Forestry Administration, Beijing 100714, China
³Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China
⁴Institute of Ecology and Geobotany, Yunnan University, Kunming 650091, China
⁵China Animal Husbandry Headstation, Beijing 100026, China

Received:2006-06-23 Accepted:2006-09-08 Online:2007-06-23 Published:2007-09-30
Contact: GE Jian-Ping

摘要/Abstract

摘要：

以中分辨率成像光谱仪数据(Moderate resolution imaging spectroradiometer, MODIS)为基础计算泾河流域归一化差异植被指数(Normalized difference vegetation index, NDVI)在2001~2004年的时间序列值,分别采用相关系数r值和成对t检验的t值定量描述年内NDVI曲线在年际间的协同性和差异性。以农田、森林、灌丛和草地4种土地利用类型NDVI曲线在年际间变化显著的面积百分比为参数,在2001~2004年间分为1、2和3年间隔共6个时间组,比较分析4种土地利用类型的NDVI曲线在6个时间组内的协同性和差异性,进而探讨泾河流域植被年际变化及其与土地利用之间的关系。结果表明:4种土地利用类型NDVI波动对外界环境的响应在不同的时间间隔里表现一致,在2001~2003年和2001~2004年间变化比较明显;在各个时间组内比较发现有较大面积的农田和草地NDVI协同性较差,尤其在2001~2002年间,这可能与退耕还林还草政策的实施有关;4年来泾河流域内4种土地利用类型的NDVI值有增加趋势,植被状况趋于良好;NDVI年际间差异最明显的是草地,其次是农田和灌丛,森林的NDVI比较稳定。

关键词: 归一化差异植被指数, 协同性, 土地利用, 泾河流域

Abstract:

Aims NDVI is extensively used as an important index in evaluating vegetation growth and dynamics, including inter-annual dynamics; however, research on the relationship between inter-annual vegetation dynamics and land use is largely lacking. This study was conducted in the Jinghe watershed to determine inter-annual NDVI dynamics in different land use types.

Methods MODIS data were used to calculate NDVI time serial values from 2001 to 2004. Correlation coefficient (r) and t-test were used to test the consistency in six temporal intervals including one-, two- and three-year scales of four land use types: cropland, forest, shrub and grassland. We calculated the percent area to quantify the spatial extent of significant inter-annual NDVI variation.

Important findings The four land use types had similar NDVI dynamics in all temporal scales. Differences were significant in 2001-2003 and 2001-2004. Cropland and grassland were generally less consistent than forest and shrub in six temporal intervals, especially in 2001-2002, which may be the result of the policy of returning farmland to forest and grassland. Annual NDVI tended to increase over time in the four land use types, suggesting vegetation in this area was gradually restored. Grassland had the greatest percent of area with significantly increasing NDVI, followed by cropland, shrub and forest.

Key words: NDVI, consistency, land use, Jinghe watershed

王辉, 昝国盛, 毕晓丽, 周睿, 熊友才, 洪军, 葛剑平. 基于MODIS的泾河流域植被动态年际变化. 植物生态学报, 2007, 31(5): 850-856. DOI: 10.17521/cjpe.2007.0107

WANG Hui, ZAN Guo-Sheng, BI Xiao-Li, ZHOU Rui, XIONG You-Cai, HONG Jun, GE Jian-Ping. MODIS-DETERMINED INTER-ANNUAL VEGETATION DYNAMICS IN JINGHE WATERSHED, CHINA. Chinese Journal of Plant Ecology, 2007, 31(5): 850-856. DOI: 10.17521/cjpe.2007.0107

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参考文献 22

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土地利用类型 Land use types	时间段 Temporal interval (Year)
土地利用类型 Land use types	2001~2002	2002~2003	2003~2004	2001~2003	2002~2004	2001~2004
农田 Crop	21.82	21.17	3.27	42.82	18.42	48.60
森林 Forest	3.54	4.36	0.43	13.93	25.63	40.71
灌丛 Shrub	7.26	10.83	1.17	22.59	17.52	34.35
草地 Grass	16.01	8.81	1.14	37.58	9.16	51.10

土地利用类型 Land use types	时间段 Temporal interval (Year)
土地利用类型 Land use types	2001~2002	2002~2003	2003~2004	2001~2003	2002~2004	2001~2004
农田 Crop	21.82	21.17	3.27	42.82	18.42	48.60
森林 Forest	3.54	4.36	0.43	13.93	25.63	40.71
灌丛 Shrub	7.26	10.83	1.17	22.59	17.52	34.35
草地 Grass	16.01	8.81	1.14	37.58	9.16	51.10

土地利用类型 Land use types	年份 Year
土地利用类型 Land use types	2001	2002	2003	2004
农田 Crop	0.30	0.33	0.33	0.34
森林 Forest	0.43	0.46	0.47	0.48
灌丛 Shrub	0.40	0.43	0.49	0.45
草地 Grass	0.29	0.33	0.33	0.33

土地利用类型 Land use types	年份 Year
土地利用类型 Land use types	2001	2002	2003	2004
农田 Crop	0.30	0.33	0.33	0.34
森林 Forest	0.43	0.46	0.47	0.48
灌丛 Shrub	0.40	0.43	0.49	0.45
草地 Grass	0.29	0.33	0.33	0.33

土地利用类型 Land use types	时间段 Temporal interval (Year)
土地利用类型 Land use types	2001~2002	2002~2003	2003~2004	2001~2003	2002~2004	2001~2004
农田 Crop	25.86	1.86	10.77	21.70	6.71	21.33
森林 Forest	21.37	0.79	5.47	10.80	2.50	11.89
灌丛 Shrub	23.10	1.20	7.35	13.95	4.47	15.90
草地 Grass	35.73	2.00	12.25	28.60	6.44	24.35

基于MODIS的泾河流域植被动态年际变化

MODIS-DETERMINED INTER-ANNUAL VEGETATION DYNAMICS IN JINGHE WATERSHED, CHINA

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