Forums | HES 健康与环境科学

02 December 2025, 5:38 PM

Speaker: Dr. Hongzheng Zhu

报告人：朱泓铮

Title: Seeing the Unseen Dynamics: Opportunities and Challenges of In-situ High-Frequency Sensor Networks

报告题目： 看见“不可见”的河流动态：原位高频传感器网络的机遇与挑战

Date: 2025-12-5

Time: 11:00 -12:00 

Room: ES354

Host: Dr. Lei Han

主持人：韩蕾

Tencent Meeting ID: 979-1135-5376

Abstract: 

Urban rivers are dynamic environments where hydrological variability, climatic extremes, and human activities interact to generate rapid and transient biogeochemical responses. Many of these critical processes occur at timescales that conventional low-frequency monitoring cannot detect. This talk introduces how in-situ high-frequency sensor networks make it possible to “see the unseen” by capturing short-lived storm pulses, hypoxia events, and nonlinear water-quality behaviors that are otherwise missed. Drawing on multi-site examples, the presentation demonstrates how high-resolution data reveal storm-driven DOM and DO dynamics, enable more informative concentration–discharge and hysteresis analyses, and clarify when and where source zones and transport pathways become activated. It further highlights how evaluating synchronicity across nested monitoring sites provides insight into catchment-scale controls, signal propagation, and spatial coherence. The talk also outlines the major challenges and emerging opportunities in this field, including the high cost of sensor deployment and maintenance, the potential of IoT-enabled low-cost monitoring networks, and the need for advanced analytical techniques to interpret nonlinear and time-shifted responses. Together, these developments illustrate how high-frequency sensing can advance process-based understanding and support more predictive and sustainable management of urban water systems

摘要：

城市河流是高度动态的系统，其水文变率、极端气候事件与人类活动相互作用，产生快速且瞬态的生物地球化学响应。许多关键过程发生在传统低频监测无法捕捉的时间尺度上。本报告介绍原位高频传感器网络如何使研究者能够“看见不可见的动态”，捕捉短暂的暴雨脉冲、缺氧事件以及常被忽略的水质非线性变化。通过多站点案例，本报告展示高分辨率数据如何揭示暴雨驱动的DOM与DO变化、提升浓度–流量关系与滞回分析的解释力，并阐明源区与输移路径在何时何地被激活。同时，跨层级监测站点之间的同步性分析也为理解整个流域的控制因素、信号传播特征与空间一致性提供了洞见。报告还讨论该领域面临的主要挑战与新机遇，包括传感器部署与维护的高成本、物联网低成本监测网络的潜力，以及解释非线性与时间偏移响应所需的先进分析技术。整体而言，高频传感为提升过程机制理解与促进城市水系统的预测性与可持续管理提供了重要支撑。

Biography：

Dr. Hongzheng Zhu is a postdoctoral researcher in the Ecohydrology and Eco-meteorology Group at Nanjing University of Information Science and Technology (NUIST). He received his Ph.D. in Geography and Environmental Science from the University of Birmingham, U.K., an M.Eng. in Environmental Engineering from the University of Melbourne, Australia, and a B.Sc. in Agricultural and Biological Engineering from the Pennsylvania State University, U.S.A.

Dr. Zhu’s research focuses on using in-situ high-frequency sensor networks to monitor riverine water quality and biogeochemical processes in human-modified catchments. His work integrates advanced sensing, hydrological analysis, and data-driven modeling to improve understanding of dissolved organic matter dynamics, nutrient transport, and storm-event processes in urban streams.

嘉宾介绍：

朱泓铮博士，现任南京信息工程大学水文与水资源学院生态水文学与生态气象学研究组博士后研究员。分别获英国伯明翰大学地理与环境科学博士、澳大利亚墨尔本大学环境工程硕士及美国宾夕法尼亚州立大学农业与生物工程学士学位。

朱博士的研究主要聚焦于利用原位高频传感器网络监测人类活动干扰下河流水质与生物地球化学过程。其工作结合了传感监测、水文分析与数据驱动建模方法，以深入理解城市河流中溶解性有机质动态、营养盐迁移及暴雨事件过程，为水质管理与流域生态恢复提供科学支撑。

Look forward to seeing you!

Liwen Wu