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中国沙漠 ›› 2023, Vol. 43 ›› Issue (6): 131-141.DOI: 10.7522/j.issn.1000-694X.2023.00053

• • 上一篇    

20年张掖盆地绿洲结构和规模变化及其影响因素

卢调雪1,2(), 杨林山1(), 冯起1, 朱猛1, 李乃玉1,3   

  1. 1.中国科学院西北生态环境资源研究院,甘肃 兰州 730000
    2.中国科学院大学,北京 100049
    3.甘肃农业大学,甘肃 兰州 730070
  • 收稿日期:2023-02-03 修回日期:2023-05-10 出版日期:2023-11-20 发布日期:2023-11-30
  • 通讯作者: 杨林山
  • 作者简介:杨林山(E-mail: yanglsh08@lzb.ac.cn
    卢调雪(1999—),女,甘肃平凉人,硕士研究生,主要从事内陆河生态水文研究。E-mail: lutiaoxue22@mails.ucas.ac.cn
  • 基金资助:
    国家自然科学基金项目(42001035);中国科学院青年创新促进会会员项目(2022435);甘肃省科技计划项目(21ZD4NF044-02)

The change of oasis structure / scale and its influencing factors in Zhangye Basin in recent 20 years

Tiaoxue Lu1,2(), Linshan Yang1(), Qi Feng1, Meng Zhu1, Naiyu Li1,3   

  1. 1.Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    2.University of Chinese Academy of Sciences,Beijing 100049,China
    3.Gansu Agricultural University,Lanzhou 730070,China
  • Received:2023-02-03 Revised:2023-05-10 Online:2023-11-20 Published:2023-11-30
  • Contact: Linshan Yang

摘要:

为明晰内陆河流域绿洲化特征及其驱动因素,以黑河流域张掖盆地绿洲为研究对象,根据土地利用和归一化植被指数(NDVI)数据反演得到2000—2020年张掖盆地绿洲规模连续数据,分析张掖盆地绿洲规模和内部结构演变规律,结合盆地近20年经济、人文、水文资源等数据厘清驱动绿洲演变的关键因素。结果表明:近20年张掖盆地绿洲规模扩张了485.78 km2,整体呈现出荒漠向绿洲转化的趋势;绿洲内部土地利用类型以耕地为主,近20年间耕地面积增加最多,相对于2000年增长了19.00%,而林地面积减少最多,相对于2000年减少了25.38%;绿洲规模和内部结构变化受自然因素和人类活动的共同作用,其中经济发展与人口增加对绿洲规模扩张和内部结构变化起直接作用,水资源对绿洲扩张起决定性作用。

关键词: 张掖盆地, 绿洲规模, 绿洲结构, 驱动因素

Abstract:

In order to clarify the characteristics and driving factors of oasisization in inland river basin, this paper took the oasis in the Zhangye Basin of Heihe River Basin as the research object, obtained the continuous oasis scale data in the Zhangye Basin from 2000 to 2020 based on land use and NDVI data inversion, and analyzed the law of change of oasis scale and internal structure in the Zhangye Basin. The key factors affecting oasis change were clarified based on the data of economic, cultural and hydrological resources in the basin in the past 20 years. The results show that the oasis scale in the Zhangye Basin has expanded by 485.78 km2 in the recent 20 years, showing a trend of the desert to oasis transformation on the whole. In oasis, the proportion of cultivated land and unused land was the largest, and the cultivated land area increased the most in the past 20 years, increasing 19.00% compared with 2000, while the forest land area decreased 25.38% compared with 2000. The changes of oasis scale and internal structure are influenced by natural factors and human activities. Economic development and population play a direct role in oasis scale expansion, and irrigation water consumption plays a decisive role in oasis scale expansion. The results can provide a basis for the rational development of soil and water resources in the inland river basin and the future layout of the oasis structure.

Key words: Zhangye Basin, oasis scale, oasis structure, driving factors

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