Seasonal hydrological exchange reversals control nitrogen transport–transformation coupling in a riverine wetland hyporheic zone

This dataset supports the findings of the study "Seasonal hydrological exchange reversals control nitrogen transport–transformation coupling in a riverine wetland hyporheic zone". The data include field observations and laboratory experimental results from the Wei-Luo-Huang Three-River Estuary Wetland in Shaanxi Province, China. Specifically, the dataset contains: (1) vertical temperature profiles and calculated hyporheic exchange fluxes across three hydrological periods (normal-flow, low-flow, and high-flow); (2) sediment physicochemical properties including pH, water content, salinity, and grain size; (3) concentrations of ammonium nitrogen, nitrate nitrogen, and nitrite nitrogen in sediment pore-water at different depths; (4) surface water and groundwater quality parameters; and (5) metagenomic sequencing data of microbial communities and nitrogen-cycling functional genes. The column experiment data simulating surface water-groundwater alternating recharge are also included. All data are presented as raw measurements and processed values used for statistical analyses, redundancy analysis, and structural equation modeling.本数据集支撑了题为《季节性水文交换逆转调控河流湿地潜流带（hyporheic zone）氮迁移-转化耦合过程》的研究成果。数据集包含中国陕西省渭洛黄三河河口湿地的野外观测数据与室内实验结果。具体而言，本数据集涵盖以下内容：(1) 三个水文周期（平水期、枯水期、丰水期）的垂向温度剖面及计算得到的潜流交换通量；(2) 沉积物理化性质，包括pH值、含水率、盐度与粒度组成；(3) 不同深度沉积物孔隙水中的铵态氮、硝态氮及亚硝态氮浓度；(4) 地表水与地下水水质参数；(5) 微生物群落与氮循环功能基因的宏基因组测序数据。本数据集同时包含模拟地表水-地下水交替补给的柱实验数据。所有数据均以用于统计分析、冗余分析（redundancy analysis）及结构方程模型（structural equation modeling）的原始测量值与处理后数值形式呈现。