img

官方微信

高级检索

中国沙漠 ›› 2023, Vol. 43 ›› Issue (5): 59-65.DOI: 10.7522/j.issn.1000-694X.2023.00036

• • 上一篇    下一篇

19662019年黄河乌兰布和沙漠宽谷段河道深泓横向摆动特征

李永山1(), 贾晓鹏2(), 王海兵3, 王建1, 马启民4   

  1. 1.盐城师范学院 苏北农业农村现代化研究院,江苏 盐城 224007
    2.中国科学院西北生态环境资源研究院 沙漠与沙漠化重点实验室,甘肃 兰州 730000
    3.内蒙古农业大学 沙漠治理学院,内蒙古 呼和浩特 010011
    4.成都信息工程大学 资源环境学院,四川 成都 610225
  • 收稿日期:2023-03-01 修回日期:2023-04-07 出版日期:2023-09-20 发布日期:2023-09-27
  • 通讯作者: 贾晓鹏
  • 作者简介:贾晓鹏(E-mail: jiaxp@1zb.ac.cn
    李永山(1990—),男,山东临沂人,博士,讲师,从事风水复合地貌研究。E-mail: liys@yctu.edu.cn
  • 基金资助:
    国家自然科学基金项目(42101016);内蒙古自治区科技成果转化专项资金项目(2021CG0046);阿拉善盟科技计划项目(AMYY2021-19);江苏省“双创博士”项目((2020)31015号)

Talweg lateral shift characteristics in the Ulan Buh Desert Reach of the Yellow River from 1966 to 2019

Yongshan Li1(), Xiaopeng Jia2(), Haibing Wang3, Jian Wang1, Qimin Ma4   

  1. 1.North Jiangsu Institute of Agricultural and Rural Modernization,Yancheng Teachers University,Yancheng 224007,Jiangsu,China
    2.Key Laboratory of Desert and Desertification,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.College of Desert Control Science and Engineering,Inner Mongolia Agricultural University,Hohhot 010011,China
    4.College of Resources and Environment,Chengdu University of Information Technology,Chengdu 610225,China
  • Received:2023-03-01 Revised:2023-04-07 Online:2023-09-20 Published:2023-09-27
  • Contact: Xiaopeng Jia

摘要:

受风沙入黄影响,黄河沙漠宽谷段河流地貌过程复杂,河道深泓摆动响应敏感。以1966—2019年黄河乌兰布和沙漠段河道断面为基础,提取深泓摆动参数,分析沙漠河流深泓横向摆动特征与规律,以期为沙漠河流管理提供参考。结果表明:河道深泓横向摆动强度与径流量及其年内分配不均匀系数、河床质粒度和河岸风沙动力条件呈现显著正相关;1966—2019年,河道深泓横向摆动幅度以每年8.24 m的速度下降,且波动幅度明显减小。河道深泓摆动过程中存在19 a和7 a时间尺度下的周期变化规律,摆动周期分别为13 a和5 a,且周期性不断减弱。深泓摆动速度与周期变化趋势指示沙漠宽谷辫状河道横向冲淤趋于稳定。

关键词: 乌兰布和沙漠, 沙漠河流, 横向摆动

Abstract:

Affected by the lateral infusion of aeolian sand into the Yellow River, geomorphological processes along the desert reach of the Yellow River are complex, of which channel lateral shift response of the river is sensitive. Based on the river channel cross-section data set of the Ulan Buh Desert reach of the Yellow River from 1966 to 2019, the talweg lateral shift parameters were extracted, and the characteristics and mechanism of the talweg lateral shift of desert rivers were analyzed, in the hope of providing references for the management of desert rivers. The results show that the lateral shift intensity of the riverbed talweg is significantly positively correlated with annual runoff and its unevenness coefficient, riverbed load grainsize and riverbank aeolian dynamic conditions. Talweg lateral shift speed decreased at an annual rate of 8.24 m from 1966 to 2019, and the fluctuation amplitude decreased significantly. Meanwhile, there are two types of periodic variation at 19 a and 7 a characteristic time scale in the process of talweg lateral shift, whose periodic variation are 13 a and 5 a, respectively, with continuously weakening periodicity. The trends of talweg lateral shift speed and periodic variation indicate that the lateral erosion and deposition of desert braided river channel tends to be stable.

Key words: Ulan Buh Desert, desert river, lateral shift

中图分类号: