地下水文连接控制酸盐出口流在一个丘陵的流域
1State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Huazhong Agricultural University, Wuhan 430070, PR China; Jiangxi Academy of Water Science and Engineering, Nanchang, Jiangxi 330029, PR China.
Water research
|February 20, 2024
概括
地下水文连接强烈控制酸盐出口在丘陵的水域. 当连接性超过值时,酸盐流量迅速增加,特别是在降雨量较高时.
科学领域:
- 水文学的水文学
- 环境科学 环境科学
- 地质形态学 地质形态学
背景情况:
- 地下下水流是丘陵水域中酸盐的主要运输途径.
- 地下水文连接影响酸盐出口量.
- 目前对该条例的理解不足.
研究的目的:
- 调查地下水文连接如何调节流域酸盐出口.
- 分析降雨事件期间连接的动态变化.
- 为了量化连接性和酸盐流量之间的关系.
主要方法:
- 在17个月的时间里,高频率的浅地下水监测.
- 基于地形的升级和图形理论,分析38个降雨事件的地下水文连接.
- 交叉相关性分析将连接性和酸盐流量联系起来.
主要成果:
- 地下最大的水文连接通常低于0.5.5.
- 大多数水域缺乏与溪流的连接,尽管有动态的流动路径.
- 连接值 (0.121) 引发了酸盐流量的快速增加.
- 连接性强烈控制酸盐流量 (中位交叉相关性为0.67),随着降雨量和强度而增加.
结论:
- 地下水文连接是流域酸盐出口的关键调节者.
- 酸盐出口模式包括冲洗,稀释和化静态行为.
- 控制酸盐流量的连接是动态的,取决于降雨量.
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