[1]邓雁菲 胡宝清 张 泽.广西西江流域输沙量时空格局演变及归因研究[J].大众科技,2020,22(08):19-22.
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广西西江流域输沙量时空格局演变及归因研究()
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《大众科技》[ISSN:1008-1151/CN:45-1235/N]

卷:
22
期数:
2020年08
页码:
19-22
栏目:
资源与环境
出版日期:
2020-08-20

文章信息/Info

Title:
Evolution and Attribution Study of Spatial and Temporal Pattern of Sediment Transport in Xijiang River Basin, Guangxi
作者:
邓雁菲 12 胡宝清 2 张 泽 12
(1.南宁师范大学地理与规划学院,广西 南宁 530001; 2.广西地表过程与智能模拟重点实验室,广西 南宁 530001)
关键词:
输沙量有序聚类分析泥沙归因分析西江
Keywords:
sediment discharge ordered clustering analysis sediment attribution analysis Xijiang river
文献标志码:
A
摘要:
科学认识河流输沙演变规律及动因,是开展水利建设最重要的依据。以广西西江为研究对象,选取具有代表性 的 4 个站点近十五年相关数据,通过有序聚类、泥沙归因及植被指数(NDVI)分析等方法,探究西江流域输沙时空演变规律以 及动因。结果表明:四个站点输沙变化均存在一二级跳跃点,一级跳跃点均发生于 2008 年前后,二级跳跃点均出现于 2012 年 前后。含沙量是输沙变化主要贡献因子,径流量、降水量的贡献率普遍偏低。流域整体植被覆盖状况良好,呈上升趋势,上游 植被指数(NDVI)稳定,输沙序列亦稳定,中下游植被指数(NDVI)变化明显,输沙序列较紊乱。水利工程建设及城市建设 用地的扩张等人类活动很可能是打断输沙量变化序列,引起突变的重要因子。
Abstract:
It is the most important basis for water conservancy construction to scientifically understand the evolution law and motivation of river sediment transport. Taking Xijiang river in Guangxi as the research object, relevant data of 4 representative stations in the past 15 years were selected, and the spatiotemporal evolution rules and motivations of sediment transport in Xijiang river basin were explored by means of orderly clustering, sediment attribution and normalized difference vegetation index (NDVI) analysis. The results show that: the first and second jump points exist in the sediment discharge changes of the four stations. The first jump points all occurred around 2008, and the second jump points all appeared around 2012. Sediment concentration is the main contributing factor of sediment discharge change, and the contribution rates of runoff and precipitation are generally low. The overall vegetation cover of the basin is in good condition, showing an upward trend, the upstream normalized difference vegetation index (NDVI) is stable, the sediment discharge sequence is also stable, the middle and downstream normalized difference vegetation index (NDVI) changes significantly, and the sediment discharge sequence is quite disordered. Water conservancy project construction and the expansion of urban construction land and other human activities are likely to interrupt the sequence of sediment discharge changes, causing an important factor of mutation.

参考文献/References:

[1] 许炯心. 中国江河地貌系统对人类活动的响应[M]. 北 京: 科学出版社,2007. [2] Wang S, Fu B J, Piao S L, et al. Reduced sediment transport in the Yellow River due to anthropogenic changes[J]. Nature Geoscience, 2015, 9(1): 38-41. [3] 郭文献,李越,张陵,等. 近 60 年长江中游宜昌站水沙 变化与驱动因素分析[J]. 水文,2019(6): 69-73,58. [4] 薛天翼,武旭同,朱晨怡,等. 红水河流域输沙量变化 及其影响因素[J].地理科学进展,2019,38(5): 772-782. [5] 苏俊磊,罗为群,王广哲,等. 基于 MODIS-EVI 的广西 西江流域植被时空变化特征及其影响因素[J]. 水土保持 研究,2019,26(3): 232-238. [6] 朱正治. 贵州省降水、径流、输沙的 Cv 与土壤侵蚀[J]. 中国水土保持,1995(11): 24-26. [7] 袁满,王文圣,叶濒璘. 有序聚类分析法的改进及其在水 文序列突变点识别中的应用[J]. 水文,2017,37(5): 8-11. [8] 应铭,李九发,万新宁,等. 长江大通站输沙量时间序列 分析研究[J]. 长江流域资源与环境,2005,14(1): 83-87. [9] Fu B J, Zhao W W, Chen L D, et al. Assessment of soilerosion at large watershed scale using RUSLE and GIS: a case study in the Loess Plateau of China[J]. Land Degradation and Development, 2005,16(1): 73-85.

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备注/Memo

备注/Memo:
【收稿日期】2020-06-05 【基金项目】复杂环境下西江流域社会—生态系统变化及其生态风险模拟研究(41661021)。 【作者简介】邓雁菲(1993-),女,广西钦州人,南宁师范大学地理与规划学院在读硕士研究生,研究方向为自然地理。 【通信作者】胡宝清(1966-),男,江西临川人,南宁师范大学地理与规划学院教授,博士,研究方向为脆弱环境演变。
更新日期/Last Update: 2020-11-17