郭程程,刘惠英

• 1:南昌工程学院水利与生态工程学院

摘要(Abstract)：

【目的】探明赣江中游左岸一级支流禾水河水沙变化驱动因素，为赣江中游土壤侵蚀治理、土地利用和功能调整等工作提供科学依据。【方法】采用Mann-Kendall检验法、Pettitt检验法、累积距平法、双累积曲线法、累积量斜率变化率法对河流控制水文站上沙兰站1980—2019年降雨量、径流量及输沙量数据进行分析，量化人类活动对禾水河水沙变化的贡献率。【结果】结果表明：(1)禾水河多年平均降雨量、径流量、输沙量分别为1 622.75 mm/a、477.53亿m~3/a、26.65万t/a。近40 a降雨量、径流量年际变化稳定，汛期输沙量年际变化大，极值比27.37;(2)禾水河水沙年内分配不均。降雨量呈双峰形，第一次达到峰值的时间为6月，其次为8月；径流量与输沙量变化趋势一致，呈单峰形主要集中在汛期4—6月，分别占全年的45.31%、64.76%;(3)年降雨量和径流量均无显著变化趋势和突变；年输沙量呈显著下降趋势，在2006年发生突变，经贡献率分析，与水库建设和水土保持治理工程具有相关性，人类活动对禾水河水沙关系的贡献率为98%。【结论】人类活动是赣江中游禾水河年输沙量减少的主要因素，其中水土保持措施的减沙作用是缓慢的且有滞后现象，而功阁水库等水利工程的拦沙作用是显著且迅速的。

关键词(KeyWords)： 赣江中游;禾水河;水沙;人类活动贡献率

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41761058);; 江西省2021年研究生创新专项资金项目“赣江流域径流时空变化研究”(YC2021-S810)

作者(Author): 郭程程,刘惠英

DOI: 10.13928/j.cnki.wrahe.2023.05.010

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