中国农业气象 ›› 2025, Vol. 46 ›› Issue (7): 1039-1049.doi: 10.3969/j.issn.1000-6362.2025.07.012

• 农业气象灾害栏目 • 上一篇    下一篇

基于VCI指数的塔里木河流域2000−2022年农业干旱时空特征

彭永,李巧,蒋平安,陶洪飞,马合木江·艾合买提   

  1. 1. 新疆农业大学水利与土木工程学院/新疆水利工程安全与水灾害防治重点实验室,乌鲁木齐 830052;2. 新疆农业大学资源与环境学院,乌鲁木齐 830052
  • 收稿日期:2024-10-28 出版日期:2025-07-20 发布日期:2025-07-20
  • 作者简介:彭永,E-mail:yongpeng_0217@qq.com
  • 基金资助:
    新疆维吾尔自治区重大科技专项项目(2023A02002-1);新疆维吾尔自治区自然科学基金青年科学基金项目(2022D01B86);新疆自治区高校基本科研业务费科研项目(XJEDU2022J008);“新疆水利工程安全与水灾害防治重点实验室”研究项目(ZDSYS−JS−2021−09)

Spatiotemporal Characteristics of Agricultural Drought in the Tarim River Basin from 2000 to 2022 Based on the Vegetation Condition Index

PENG Yong, LI Qiao, JIANG Ping-an, TAO Hong-fei, MAHEMUJIANG Aihemaiti   

  1. 1. College of Hydraulic and Civil Engineering, Xinjiang Agricultural University/Xinjiang Key Laboratory of Hydraulic Engineering Security and Water Disasters Prevention, Urumqi 830052, China; 2. College of Resources and Environment, Xinjiang Agricultural University, Urumqi 830052
  • Received:2024-10-28 Online:2025-07-20 Published:2025-07-20

摘要:

基于美国国家航空航天局20002−202212月逐月MODIS系列NDVI数据,计算植被状态指数(VCI),结合土地利用数据,利用一元线性回归Theil−Sen Median趋势分析、Mann−Kendall检验等方法分析VCI变化趋势突变情况、干旱面积占比和干旱频率,探讨塔里木河流域农业干旱时空特征。结果表明:12000−2022年塔里木河流域VCI集中在0.3~0.6且呈显著上升趋势。干旱面积占比显著下降趋势干旱面积占比最大值为98.4%,最小值为38.6%。干旱最严重的季节、年份、土地利用类型分别是春季、2000耕地。塔里木河全流域及其不同土地利用类型(耕地、林地、草地)农业干旱突变年份分别为2011年、2010年、2014年和2015年。(2)生长季VCI空间变化为极显著增加趋势的比例最大,其值为63.50%。春季、夏季、秋季、生长季农业干旱频率主要集中在50%~100%区间。VCI空间变化为显著增加趋势的区域主要分布在开都−孔雀河中部和东南部,阿克苏河中部,喀什噶尔河中部和东北部。农业干旱低频区域主要分布在和田河南部,克里亚河诸小河南部,车尔臣河诸小河北部西南部。综合来看,2000−2022年塔里木河流域农业干旱以全域性干旱为主且呈逐年减轻趋势。

关键词: 植被状态指数(VCI), 农业干旱, 时空特征, 塔里木河流域

Abstract:

Based on monthly MODIS series NDVI data from NASA between February 2000 and December 2022, the vegetation condition index (VCI) was calculated, and combined with land use type data. Methods such as univariate linear regression, the Theil-Sen Median trend test, and the Mann−Kendall test were used to analyze the trend and abrupt change of VCI, the drought proportion, and the drought frequency. The spatiotemporal characteristics of agricultural drought in the Tarim river basin were explored. The results indicated that: (1) the VCI concentration in the Tarim river basin from 2000 to 2022 was between 0.3−0.6 and showed a significant increase trend. The drought proportion was showing a significant decrease trend, with the highest drought proportion being 98.4%, and the lowest being 38.6%. The most severe seasons, annual, and land use types of drought were spring, 2000 and cultivated land, respectively. The years of agricultural drought abrupt changed in the Tarim river basin and its different land use types (cultivated land, wood land, meadow) were in 2011, 2010, 2014, and 2015, respectively. (2) The proportion of VCI spatial changes showed a highly significant increasing trend during the growing season was the highest, accounting for 63.50%. The frequency of agricultural drought in spring, summer, autumn, and growing season was mainly concentrated in the range of 50%−100%. The regions where VCI spatial changes showed a significant increasing trend, mainly distributed in the central and southeastern parts of Kaidu−Kongque river, the central part of Aksu river, the central and northeastern parts of Kashgar river. The low−frequency areas where agricultural drought occurs were mainly distributed in the southern part of Hotan river, the southern part of the small rivers of Crimea river, and the northern and southwestern parts of the small rivers of Chechen river. Overall, the agricultural drought in the Tarim river basin from 2000 to 2022 is mainly characterized by regional drought and shows a decreasing trend year by year.

Key words: Vegetation condition index (VCI), Agricultural drought, Spatiotemporal characteristics, Tarim river basin