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复杂的河流-河口连续的水质响应和管理导向的空间值

Jiang Wu¹, Tang Liu², Dian-Bao Li³

¹Eco-environment and Resource Efficiency Research Laboratory, School of Environment and Energy, Peking University Shenzhen Graduate School, Shenzhen 518055, China.

|March 9, 2026

概括

网络配置显著影响珍珠河三角洲的水质,800米的缓冲区通过分离河流和河口区域来优化管理. 这项研究揭示了有针对性的水质控制的关键驱动因素和空间变化.

科学领域:

环境科学环境科学
水资源管理水资源管理
生态生态学生态生态学

背景情况:

珍珠河三角洲 (PRD) 是一个复杂的,城市化的河口系统,具有复杂的网络,对水质管理构成挑战.
强烈的人类调节和潮和盐度分层等自然因素使理解网络结构和水质之间的关系变得复杂.
目前的统一管理方法不足,因为对时空水质变化及其驱动因素的知识有限.

研究的目的:

分析PRD在2019-2023年间的时间空间水质变化.
确定网络配置和环境驱动因素对水质的影响.
建立最佳的空间尺度,以有效地,有针对性的水质管理.

主要方法:

从45个站点 (2019-2023) 收集每日水质数据.
计算的网络指标包括树突连接指数 (DCI) 和发展系数 (Kω).
采用LightGBM和Mantle分析,将水质变化归因于网络结构,水化学,水文学和社会经济驱动因素.

主要成果:

网络几何学显示出明显的空间差异化,DCI呈现出南北梯度.
为水质驱动因素确定了400-800m的最佳解释距离.
水化学,水文学和社会经济因素是主要的驱动因素,像DCI和水面比 (Wp) 这样的网络指标显著影响电导率和度.
一个800米的缓冲区有效地将河流和河口区分开,用于管理目的.

结论:

网络配置在通过流量连接和材料运输来管理水质方面发挥着至关重要的作用.
人类活动和水力动力学连接是水质变化的主要驱动因素,特别是在中间空间尺度 (≥600m) 上.
建议采用800米的缓冲区方法,用于PRD城市聚合区的区域水质管理.

关键词:

环境影响值是指环境影响值.网络几何学网络几何学河流-河口连续体.有针对性的管理管理.水质的变化水质的变化

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