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2000–2017年中巴经济走廊逐年荒漠化分布数据集
A dataset of desert distributions along the China–Pakistan Economic Corridor 2000 – 2017
: 2018 - 09 - 11
: 2018 - 09 - 12
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摘要&关键词
摘要:土地荒漠化是目前世界上最为严重的生态环境问题之一。荒漠化不仅影响了生态环境,久而久之影响了社会和经济的发展。监测土地荒漠化动态变化,掌握其变化规律对防治荒漠化有很重要的意义。中巴经济走廊是国家“一带一路”倡议的标志性项目,对中国和巴基斯坦以及周边国际的经济文化交流有着重要意义。中巴经济走廊全长约3000公里,其中1300余公里为严寒高原、干旱和荒漠区段。尤其是在南段,干旱和大面积荒漠是其主要的生态环境约束因素。本文采用荒漠化差值指数(DDI)评价中巴经济走廊荒漠化程度,以归一化植被指数(NDVI)与地表反照率(Albedo)为监测指标,通过构造Albedo-NDVI特征空间,并利用Albedo和NDVI之间负相关的关系,构建DDI公式,完成2000–2017年中巴经济走廊荒漠化分类专题数据集,直观反映中巴经济走廊荒漠化程度,为定量评价荒漠化严重程度提供参考,为中巴经济走廊沿线国家进行荒漠化防治工作以及宏观决策的制定提供基础资料。
关键词:中巴经济走廊;荒漠化分布;NDVI-Albedo特征空间;DDI荒漠化差异指数;Albedo地表反照率
Abstract & Keywords
Abstract: Desertification has caused severe ecological environment problems worldwide. It not only affects the ecological environment of human beings, but also hinders social and economic development. It is thus of great importance to monitor the dynamic process of desertification and capture its law for prevention deployment. An iconic project of the Belt and Road Initiative, the China–Pakistan Economic Corridor is critical to economical and cultural exchanges of the China-Pakistan region. The Corridor is about 3,000 kilometers long, covering more than 1,300 kilometers of permafrost, arid and desert regions. Especially its southern section is characterized by drought and large-scale desert, whcih constitutes the Corridor’s major ecological constraints. In this study, desertification difference index (DDI) was used to evaluate the degree of desertification in the Corridor. Based on Normalized Difference Vegetation Index(NDVI) and Albedo, we established a Albedo-NDVI space and a DDI formula through negative correlation between Albedo and NDVI. Based on DDI, we built the dataset of desert distributions along the China–Pakistan Economic Corridor during 2000 – 2017. This dataset reflects the degree of desertification along the Corridor, providing information for desertification prevention and control in the countries around.
Keywords: China–Pakistan Economic Corridor; desertification; NDVI-Albedo space; desertification difference index (DDI)
稿件与作者信息
敏玉芳
Yufang Min
myf@lzb.ac.cn
冯克庭
Feng Keting
康建芳
kangjianfang
艾鸣浩
Ai Minghao
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