LI Qiuyan,FANG Haiyan,LI Guoqiang.Research on Sediment Sources of the Shouchangjiang River[J].Research of Soil and Water Conservation,2022,29(04):115-120.
寿昌江河流泥沙来源研究
- Title:
- Research on Sediment Sources of the Shouchangjiang River
- 文章编号:
- 1005-3409(2022)04-0115-06
- 分类号:
- S157; P333.4
- 文献标志码:
- A
- 摘要:
- 人类活动是影响河流泥沙淤积的重要因素,为探讨道路建设和河道破坏对河流产沙的影响,以浙江省寿昌江流域为研究对象,采用复合指纹识别示踪技术,得到了不同潜在泥沙来源区对河流产沙的贡献。结果表明:采用Kruskal-Wallis H-test(KW-H)与多元判别分析(DFA)组合、主成分分析(PCA)与DFA组合得到的指纹示踪因子,结合复合指纹示踪模型,均能够很好地区分泥沙来源,但PCA和DFA统计法得到的4个指纹示踪因子组合能更好地区分泥沙来源。在河流出口处,来自河道的泥沙最多,占河流总产沙的34.7%,其次是建设用地,其产沙贡献为总产沙的28.1%,来自林地和水田的泥沙贡献分别为24.1%,12.7%,旱地产沙贡献最小,仅为0.3%。降水、土地利用、造桥、挖沙及道路建设等是引起产沙贡献差异的重要原因。因此,寿昌江流域降雨量大,植被覆盖度高,河流泥沙主要来自人类生产建设对地表的破坏。
- Abstract:
- Human activity is the main factor inducing sediment siltation in rivers. In order to explore the impacts of road construction and river bed destruction on sediment yield in rivers, the Shoucang River in Zhejiang Province was selected in this study, and sediment contributed from different potential source areas were quantified. Two groups of fingerprinting factors were derived from the statistical combinations of Kruskal-Wallis H-test(KW-H)and discriminant function analysis(DFA), and principal component analysis(PCA)and DFA, both of which could well discriminate sediment source when they were used with a composite fingerprinting tracer model. However, the four fingerprints from PCA and DFA were better to discriminate the five potential sediment source areas. At the outlet of the river, the sediment from river beds was the most, occupying 34.7% of the total, followed by 28.1% sediment from construction lands, 24.1% sediment from forest lands, and 12.7 sediments from paddy fields. The sediment contribution from dry lands was the least, occupying only 0.3% of the total. Precipitation, land use, instream sand mining, bridge building, and road construction activities could explain the different contributions from the five potential sand source areas. Therefore, in the Shouchang River Basin where precipitation is high and vegetation coverage is dense, sediment in rivers mainly came from the destructed land surface by human production and construction activities.
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备注/Memo
收稿日期:2021-04-22 修回日期:2021-06-13
资助项目:国家自然科学基金(41977066); 国家重点研发计划(2021YFD1500703); 建德市水文水资源监测站项目
第一作者:李秋艳(1978—),女,山东金乡人,博士后,策划编辑,主要从事自然地理学和出版编辑研究。E-mail:liqiuyan@mail.sciencep.com
通信作者:方海燕(1977—),男,山东金乡人,博士,研究员,主要从事土壤侵蚀与水土保持研究。E-mail:fanghy@igsnrr.ac.cn