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中国沙漠 ›› 2024, Vol. 44 ›› Issue (5): 95-104.DOI: 10.7522/j.issn.1000-694X.2024.00029

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苏宏图戈壁地表沉积物组分变异性及其成因

郭晓敏1,2(), 王海兵1,2,3(), 廖承贤1,2, 杨皓钦1,2, 华天红1,2, 刘旭1,2   

  1. 1.内蒙古农业大学,沙漠治理学院,内蒙古 呼和浩特 010011
    2.内蒙古农业大学,内蒙古自治区风沙物理与防沙治沙工程重点实验室,内蒙古 呼和浩特 010011
    3.内蒙古农业大学,内蒙古杭锦荒漠生态系统国家定位观测研究站,内蒙古 呼和浩特 010011
  • 收稿日期:2023-11-27 修回日期:2024-03-06 出版日期:2024-09-20 发布日期:2024-10-15
  • 通讯作者: 王海兵
  • 作者简介:王海兵(E-mail: hbwang@imau.edu.cn
    郭晓敏(1999—),女,内蒙古乌兰察布人,硕士研究生,主要从事荒漠化防治研究。E-mail: guoxiaominsmy@163.com
  • 基金资助:
    国家自然科学基金项目(42261002);高校青年科技英才项目(NJYT22039);内蒙古自治区高等学校创新团队项目(NMGIRT2408)

Spatial variability and its genesis of surface sediments in Suhongtu Gobi

Xiaomin Guo1,2(), Haibin Wang1,2,3(), Chengxian Liao1,2, Haoqin Yang1,2, Tianhong Hua1,2, Xu Liu1,2   

  1. 1.College of Desert Control Science and Engineering /, Inner Mongolia Agricultural University,Hohhot 010011,China
    2.Inner Mongolia Key Laboratory of Aeolian Physics and Desertification Control Engineering /, Inner Mongolia Agricultural University,Hohhot 010011,China
    3.Inner Mongolia Hangjin Desert Ecosystem National Positioning Observation and Research Station, Inner Mongolia Agricultural University,Hohhot 010011,China
  • Received:2023-11-27 Revised:2024-03-06 Online:2024-09-20 Published:2024-10-15
  • Contact: Haibin Wang

摘要:

本文通过对苏宏图戈壁地表0~2 cm及地下10~20 cm土层沉积物的组分测试、相对蚀积率计算及其空间变异性分析,揭示戈壁区域景观地表分异及风沙活动对其粒度的影响。结果表明:苏宏图区域地表可大致分为侵蚀区(轻度、重度)和堆积区。地表沉积物在风力、水力作用的影响下,侵蚀区地表沉积物相对于地下表现为悬移、蠕移及风蚀残余组分增加,跃移组分减少。地表植物稀少,砾石覆盖度高。堆积区地表沉积物相对于地下而言多表现为悬移、跃移组分增加,蠕移及风蚀残余组分减少,地表有沙辫和灌丛沙丘,或新月形沙丘和沙丘链分布。0~2、10~20 cm土层悬移、跃移、蠕移及风蚀残余组分呈中等的空间自相关性(25%~75%),块金值较小,0~2 cm土层各组分变程均大于10~20 cm土层,各组分的空间自相关范围变大,组分的空间连续性增强。

关键词: 沉积物粒度, 相对蚀积率, 空间变异性, 戈壁

Abstract:

In this paper, the composition test, relative erosion rate calculation and spatial variability analysis of 0-2 cm surface and 10-20 cm underground sediments in Suhongtu Gobi are used to reveal the influence of landscape surface differentiation and wind sand activity on grain size. The results show that the surface of the Suhongmap can be roughly divided into erosion areas (light, heavy) and accumulation areas. Under the influence of wind and hydraulic action, the residual components of suspended, creep and wind erosion increase, and saltation components decrease. The surface vegetation is sparse and the gravel coverage is high. Compared with the underground, the surface sediments in the accumulation area mostly show the increase of suspended and saltation components, the decrease of creep and wind erosion residual components, and the distribution of sand braided and scrub dunes, or barchan dunes and dune chains on the surface. The suspension, saltation, creep and wind erosion residual components in 0-2 cm and 10-20 cm soil layers show moderate spatial autocorrelation (25%-75%), and the nugget value is small. The variation range of each component in 0-2 cm soil layer is greater than that in 10-20 cm soil layer, and the spatial autocorrelation range of each component is larger and the spatial continuity of each component is enhanced.

Key words: sediment granularity, relative erosion rate, spatial variability, gobi

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