环境保护科学2025，Vol.51Issue(2)：152-158,174,8.DOI:10.16803/j.cnki.issn.1004-6216.2023120026
赤峰市土地荒漠化时空变化分析
Analysis of spatial-temporal variation characteristics of land desertification in Chifeng
摘要
Abstract
The monitoring of land desertification is an important part of ecological environment monitoring.Based on the MODIS NDVI data from 2000 to 2022,the vegetation coverage dataset of Chifeng was obtained through the pixel dichotomy model,and the desertification index was calculated.Combining methods such as Theil-Sen Median trend analysis,Mann-Kendall significance test method,Hurst index and partial correlation analysis,the spatial-temporal variation characteristics of land desertification in Chifeng and the main meteorological influencing factors were analyzed.The results showed that from 2000 to 2022,the multi-year average value of the desertification index in Chifeng was 0.41,showing an overall downward trend,with a decline rate of 0.04 per 10 years.The land desertification in Chifeng generally showed the characteristics that the proportion of non-desertification areas increases,the proportions of light and moderate desertification areas decrease,and the areas of severe and extremely severe desertification basically remained unchanged.The Hurst index showed that the proportions of areas where the desertification index would show a downward and an upward trend in the future are 41.9%and 52.0%respectively.The partial correlations between the desertification index and the annual precipitation as well as the annual average temperature were mainly negative correlations,and precipitation was the main meteorological factor affecting the land desertification in Chifeng.The research results could provide a theoretical basis for the prevention and control of land desertification in Chifeng.关键词
荒漠化/植被覆盖度/像元二分模型/时空变化/赤峰市Key words
desertification/vegetation coverage/pixel dichotomy model/spatial-temporal variation/Chifeng分类
资源环境引用本文复制引用
张迎杰,樊雪丰,刘建成,王海梅..赤峰市土地荒漠化时空变化分析[J].环境保护科学,2025,51(2):152-158,174,8.基金项目
内蒙古自治区科技计划(2022YFSH0130) （2022YFSH0130）
内蒙古自治区自然科学基金项目(2021MS03105) （2021MS03105）
