测绘通报 ›› 2018, Vol. 0 ›› Issue (5): 102-107.doi: 10.13474/j.cnki.11-2246.2018.0153

• 技术交流 • 上一篇    下一篇

基于MODIS植被丰度的沙漠化界线提取方法探究——以陕甘宁地区为例

马静宇, 秦怡, 任宇鹏, 王鑫, 谷娟, 郭仲皓, 邹乐君, 沈晓华   

  1. 浙江大学地球科学学院, 浙江 杭州 310000
  • 收稿日期:2017-10-11 出版日期:2018-05-25 发布日期:2018-05-31
  • 通讯作者: 沈晓华。E-mail:shenxh@zju.edu.cn E-mail:shenxh@zju.edu.cn
  • 作者简介:马静宇(1993-),女,硕士生,研究方向为遥感地质。E-mail:majingyu@zju.edu.cn
  • 基金资助:

    国家科技重大专项(2017ZX05008-001)

Estimating the Desertification Boundary Using Vegetation Abundance Derived from MODIS Data: A Case Study of Shanxi-Gansu-Ningxia Region, China

MA Jingyu, QIN Yi, REN Yupeng, WANG Xin, GU Juan, GUO Zhonghao, ZOU Lejun, SHEN Xiaohua   

  1. School of Earth Sciences, Zhejiang University, Hangzhou 310000, China
  • Received:2017-10-11 Online:2018-05-25 Published:2018-05-31

摘要:

以陕甘宁地区为研究区、2001—2015年的MODIS遥感影像为数据源,基于MODIS像元的植被丰度提出了累积曲线梯度变化法,通过提取沙漠化界线确定了用植被丰度表达的界线指标,讨论了陕甘宁地区的沙漠化变化。结果表明:①基于数学统计分析方法的累积曲线梯度变化法,方法简单、可操作性强,为沙漠化的定量分析与动态监测提供了新方法;②以植被丰度15%为指标作为陕甘宁地区的沙漠化界线,发现在这15年间,陕甘宁地区的沙漠化呈现在波动中不断改善的总体趋势。

关键词: 沙漠化监测, 植被丰度, 累积曲线, MODIS

Abstract:

In this study,the Shanxi-Gansu-Ningxia region is selected as the study area,and MODIS data from 2001 to 2015 is chosen as data source.The objective of this study is to explore the possibility of using vegetation abundance derived from MODIS data to estimate the desertification boundary at a large regional scale.Its significance in application is that it can quickly monitor the process of desertification by the movement of the boundary and improve accuracy of desertification assessment.The results show that:①The method developed in this paper allowed the easy and scientific determination of the desertification boundary.②When using the estimated 15% vegetation abundance isoline as the desertification boundary,we find that the desertification area shows a general trend of constant improvement with some volatility during the period from 2001 to 2015.

Key words: desertification monitoring, vegetation abundance, cumulative curve, MODIS

中图分类号: