Abstract：
To trace the origin of the gushing water in the riverine area of the Beijing section of The Middle Route of South-to-North Water Diversion Project, a dataset was established comprising water chemistry, three-dimensional fluorescence spectra, and stable isotopes for different water bodies. Results indicated significant differences in Electrical Conductivity (EC), Total Dissolved Solids (TDS), and Ca2+ concentration among the gushing water, river water, and the water from the Middle Route of South-to-North Water Diversion Project (MRSD). Analysis using parallel factor analysis (PARAFAC) and fluorescence index revealed that dissolved organic matter (DOM) in the MRSD mainly originated from endogenous sources, while the river water and gushing water showed influences from both endogenous and exogenous sources. Nitrate sources varied among the water bodies, with distinct contributions from domestic sewage and fertilizer sources. The evaporation lines of river water and gushing water exhibited similar intercepts and slopes, but their intercepts and slopes are much smaller than those of the MRSD, suggesting stronger kinetic evaporative fractionation. In conclusion, the gushing water in the riverine area of the MRSD was determined to originate from the river, providing a fast and efficient method for gushing water source identification.
摘要：
为追溯南水北调中线北京段沿江地区涌水的成因,建立了一个包含水化学的数据集，三维荧光光谱,和不同水体的稳定同位素。结果表明电导率（EC）存在显着差异，总溶解固体（TDS），以及喷涌水中的Ca2+浓度，河水,以及南水北调中线工程（MRSD）的水。使用平行因子分析（PARAFAC）和荧光指数的分析表明，MRSD中的溶解有机物（DOM）主要来自内源来源，而河水和涌出的水显示出来自内源和外源的影响。水体中的硝酸盐来源各不相同，与生活污水和化肥来源的不同贡献。河水和涌水的蒸发线表现出相似的截流和坡度，但是它们的截距和坡度比MRSD小得多，表明动力学蒸发分馏更强。总之,MRSD河流区域涌出的水被确定为来自河流，提供了一种快速高效的涌水水源识别方法。
