Hydrochemical Characteristics and Controlling Factors of Hengshui Lake Wetland During the Dry Season, North China

作者：Hongyan An, Tianjiao Wang, Xianzhou Meng, Xueyao Niu, Dongyang Song, Yibing Wang, Ge Gao, Mingming Li, Tong Zhang, Hong‐Liang Song, Xinfeng Wang, Kuanzhen Mao · 发表于：Water · 年份：2025 · DOI：10.3390/w17101468 · 被引用次数：3 · 研究领域：Constructed Wetlands for Wastewater Treatment、Peatlands and Wetlands Ecology、Aquatic Ecosystems and Phytoplankton Dynamics

Wetland lakes are crucial ecosystems that serve as vital ecosystems that harbor rich biodiversity and provide essential ecological services, particularly in regulating regional water resources, purifying water quality, and maintaining ecological equilibrium. This study aims to conduct an in-depth investigation into the hydrochemical characteristics and their controlling factors during the dry season of the Hengshui Lake wetland system. By collecting water samples from the lake and shallow groundwater, and using water chemistry diagrams, ion ratios, mineral saturation indices, and multivariate statistical methods, the study systematically analyzes the hydrochemical characteristics of Hengshui Lake Wetland and its controlling factors. The results show: there is significant stratified differentiation in the water chemical composition: the lake water is weakly alkaline and fresh, while the shallow groundwater is highly mineralized and saline. Both are dominated by Na+, Mg2+, SO42−, and Cl−. Significant differences exist in water chemistry types between the lake and shallow groundwater. The lake water exhibits homogenized characteristics with a dominant SO4·Cl·HCO3-Na·Mg type, whereas shallow groundwater displays five distinct hydrochemical facies indicative of multi-source recharge processes. Evaporation–rock interaction mechanisms dominate the system, as evidenced by a Gibbs diagram analysis showing evaporation crystallization as the primary control. Ion ratio calculations demon...