摘要
为探讨准噶尔盆地南缘荒漠绿洲交错带土地沙化的变化规律,选取干燥度指数、起沙风天数、土壤质地、植被覆盖度4个因子作为评价指标,基于多源数据开展准噶尔盆地南缘荒漠绿洲交错带2015—2020年土地沙化敏感性空间分布格局及其动态变化研究。结果表明:2015、2020年准噶尔盆地南缘荒漠绿洲交错带67%~70%的评估区域土地沙化敏感性处于敏感等级,一般敏感占评价区总面积的28%~31%,极敏感等级面积不足3%,主要发生在研究区东部戈壁区域。总体上,2015—2020年准噶尔盆地南缘荒漠绿洲交错带土地沙化敏感性除巴里坤山南部戈壁区域、奇台县、吉木萨尔县、克拉玛依局部区域、乌苏市西北角外,其余变化区域均由敏感性高等级向低等级转化,土地沙化敏感性呈改善趋势。
In order to investigate the changing rules of land desertification in the Desert-oasis Ecoton in the southern margin of Junggar Basin,dryness index,sandstorm days,soil texture,vegetation coverage were selected as evaluation indexes,spatial distribution pattern of land desertification sensitivity and its dynamic changes were discussed from 2015 to 2020 based on multi-source data.The desertification sensitivity assessment results showed that the sensitive level,general sensitivity,extremely sensitive level accounted for 67%~70%,28%~31%,and less than 3%respectively,in which extremely sensitive level mainly occurs in the gobi area in the east of desert-oasis ecotone in the southern margin of Junggar Basin from 2015 to 2020.In general,except for the Gobi area in the southern part of Barkkun Mountain,Qitai County,Jimsar County,local areas of Karamay and northwest of Wusu City,the sensitivity of land desertification in the desert-oasis ecotone in the southern margin of Junggar Basin changed from high to low level from 2015 to 2020,and the sensitivity of land desertification showed an improving trend.
作者
常梦迪
陈丽
牛婷
李潇然
刘少堂
任璇
CHANG Mengdi;CHEN Li;NIU Ting;LI Xiaoran;LIU Shaotang;REN Xuan(Xinjiang Academy of Environmental Protection Science,Urumqi Xinjiang 830011,China;Xinjiang Key Laboratory for Environmental Pollution Monitoring and Risk Warning,Urumqi Xinjiang 830011,China;Xinjiang Engineering Technology Research Center for Cleaner Production,Urumqi Xinjiang 830011,China;Junggar Desert-oasis Ecotone Station for Scientific Observation and Research of National Environmental Protection,Urumqi Xinjiang 830011,China)
出处
《新疆环境保护》
2023年第3期12-19,共8页
Environmental Protection of Xinjiang
基金
新疆环境保护科学研究院院创新基金(202103)。
关键词
准噶尔盆地
荒漠绿洲交错带
土地沙化敏感性
时空格局
Junggar Basin
desert-oasis ecotone
land desertification sensitivity
spatio-temporal patterns
