[1]苏俊磊,罗为群,王广哲,等.基于MODIS-EVI的广西西江流域植被时空变化特征及其影响因素[J].水土保持研究,2019,26(03):232-238.
　SU Junlei,LUO Weiqun,WANG Guangzhe,et al.Spatiotemporal Variation of Vegetation and Its Influencing Factors in Xijiang River Basin of Guangxi Based on MODIS-EVI[J].Research of Soil and Water Conservation,2019,26(03):232-238.
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基于MODIS-EVI的广西西江流域植被时空变化特征及其影响因素

《水土保持研究》[ISSN:1005-3409/CN:61-1272/P] 卷: 26 期数: 2019年03期 页码: 232-238 栏目: 出版日期: 2019-04-12
Title:
Spatiotemporal Variation of Vegetation and Its Influencing Factors in Xijiang River Basin of Guangxi Based on MODIS-EVI
作者:
苏俊磊1,2, 罗为群1,3, 王广哲1, 杨奇勇1, 周永华1,3, 黄静1,3, 蒋忠诚1
1. 中国地质科学院 岩溶地质研究所/自然资源部岩溶生态系统与石漠化治理重点实验室, 广西 桂林 541004;
2. 中国地质大学(北京), 北京 100083;
3. 广西师范学院, 南宁 530001
Author(s):
SU Junlei1,2, LUO Weiqun1,3, WANG Guangzhe1, YANG Qiyong1, ZHOU Yonghua1,3, HUANG Jing1,3, JIANG Zhongcheng1
1. Institute of Karst Geology, CAGS/Key Laboratory of Karst Ecosystem and Treatment of Rocky Desertification, MNR, Guilin, Guangxi 541004, China;
2. China University of Geosciences Based in Beijing, Beijing 100083, China;
3. Guangxi Teachers Education University, Nanning, 530001, China
关键词:
MODIS-EVI; 植被; 时空变化; 西江流域; 广西
Keywords:
MODIS-EVI; vegetation; spatiotemporal changes; Xijing River Basin; Guangxi
分类号:
Q948;TP75
摘要:
基于MODIS-EVI数据对2007—2016年广西西江流域植被时空变化特征进行了分析，进而探讨其影响因素。结果表明：近10年来，研究区月EVI呈周期性变化，每年7—8月份最高，1—2月份最低，明显受到季节性气候等自然因素控制。EVI年际变化总体呈上升的趋势，可能与一系列植被保护措施有关，但存在两次骤然下降现象，可能是受到重大自然灾害的影响。岩溶区与非岩溶区EVI变化趋势与全区基本一致。研究区EVI具有明显的空间差异，EVI高值（>0.4）主要分布于高海拔或人为破坏小的地区，适合实施封山育林、人工造林等生态修复举措；EVI低值（≤0.4）主要分布于水系发达或城市中心地带等低海拔地区，受到自然条件和城镇化发展的制约。另外，研究区植被EVI与气温和降雨均呈显著正相关，且与气温的相关性明显高于降雨，对气温和降雨的响应均存在1个月的滞后期。
Abstract:
Based on the MODIS-EVI data, the spatiotemporal variation of vegetation in Xijiang River Basin of Guangxi from 2007 to 2016 was analyzed and then its influencing factors were discussed. The results indicated that in recent decade, the monthly EVI in the study area periodically oscillated, and had the peak and nadir values from July to August and from January to February, respectively, which was clearly controlled by natural factors such as seasonal climate. The interannual variation of EVI was on the rise as a whole, and possibly related to a series of vegetation protection measures, but displayed two abrupt drops which might be affected by serious natural disasters in Southwest China. The variation trend of EVI in karst region and non-karst region was nearly consistent with that of the whole region. EVI of vegetation mainly ranging from 0.4 to 0.6 in the study area had obvious spatial differences. High EVI values (>0.4) mainly distributed in the high altitude areas with little anthropogenic damage where the measures of forest reservation and artificial afforestation were feasible. Conversely, low EVI values (≤ 0.4) were observed in the low altitude areas such as river system and urban center restricting the increase of vegetation coverage. In addition, EVI of vegetation showed a significant positive correlation with- and a one-month lag in response to both temperature and rainfall, and its correlation with temperature was higher than that with rainfall.

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备注/Memo

收稿日期:2018-07-02;改回日期:2018-09-13。
基金项目:滇黔桂岩溶区土地质量地球化学调查（121201237000160024）；桂西南峰丛洼地水土漏失过程与阻控技术研究与示范（200000002371610053）
作者简介:苏俊磊(1994-),男,湖南长沙人,硕士研究生,主要从事岩溶地区石漠化治理。E-mail:962618449@qq.com
通讯作者:罗为群(1980-),男,广西桂林人,副研究员,硕士生导师,主要从事岩溶石漠化治理和国土整治研究。E-mail:oyrlwq@karst.ac.cn

更新日期/Last Update: 1900-01-01