河道潜流交换水动力过程现场监测研究进展

河道潜流带是河水与地下水交互作用的关键过渡区，具有高度的动态性和敏感性，频繁的水力交换易引发其内部的生物地球化学反应，并对河流生态安全产生重要影响。为提高河道潜流交换水动力监测结果的真实性和有效性，介绍渗流、水压、溶质、温度等监测方法及其适用性，归纳河床和河岸的监测点布设参数和不同监测手段的数据采集频率，系统总结河段、河床及河岸的潜流交换理论与计算方法，探讨导致潜流监测结果不确定的因素。针对现有监测方法的不足和未来研究的发展方向，提出今后需加强多方法联合监测和多技术集成的应用，开展河岸侧向潜流监测及不确定性分析等工作，为潜流带水文-生物地球化学过程耦合机制研究提供可靠数据。

Advance in field monitoring research of hydrodynamic process of hyporheic exchange in rivers

The hyporheic zone is the key transition region between rivers and aquifers, which is highly dynamic and sensitive. Frequent water exchange can trigger the bio-geochemical reactions within the hyporheic zone easily, and consequently make a difference to river ecological security. On the purpose of improving the authenticity and validity of the hyporheic flow hydrodynamic monitoring, the present study introduces various monitoring methods including seepage, water pressure, solute & temperature tracing and their applicability, and summarizes the monitoring points arrangement in the riverbed and adjacent riparian zone and the data acquisition frequency of different monitoring methods. The hyporheic exchange theory and calculation methods for reach, riverbed and riparian zone are summarized systematically, and the factors causing measurement uncertainties of the hyporheic exchange are discussed in the paper. In view of the deficiencies of the existing monitoring methods and the development direction of future research, it is proposed to strengthen the application of multi-method joint and multi-technology integration in future and carry out the lateral hyporheic flow monitoring and uncertainty analysis. By this means, the reliable data for studies on the coupling mechanism between hydrological and bio-geochemical processes in the hyporheic zone might be provided.