济南泉域岩溶水系统溶解性有机质的光谱特性及指示作用  

Spectral characteristics and indication of dissolved organic matter in the karst water system of Jinan

作　　者：刘丹 田婵娟[1,2] 陈学群 徐丹丹[1,2] 管清花 辛光明 LIU Dan;TIAN Chanjuan;CHEN Xuequn;XU Dandan;GUAN Qinghua;XIN Guangming(Water Resources Research Institute of Shandong Province,Jinan,Shandong 250014,China;Shandong Province Key Laboratory of Water Resources and Environment,Jinan,Shandong 250014,China)

机构地区：[1]山东省水利科学研究院,山东济南250014 [2]山东省水资源与水环境重点实验室,山东济南250014

出　　处：《中国岩溶》2024年第3期500-512,共13页Carsologica Sinica

基　　金：山东省自然科学基金项目(ZR2021QD021,ZR2021MD086);水利技术示范项目(SF-202210);山东省水利科学研究院自选课题(SDSKYZX202121-1)。

摘　　要：选取济南泉域岩溶水系统为研究对象,在分析水化学特征的基础上,采用紫外-可见光光谱、三维荧光光谱和平行因子分析方法,识别岩溶水系统中溶解性有机质(DOM)的组分、来源及其空间分布特征,探讨影响DOM分布特征的控制因素及其指示作用。结果表明:识别出的岩溶水系统中3种主要荧光组分分别为腐殖质物质、类蛋白色氨酸和类蛋白酪氨酸,间接补给区以腐殖质物质组分为主(31%),直接补给区和汇集排泄区以类蛋白色氨酸物质为主(48.5%和45.6%)。岩溶地下水DOM处于弱腐殖化水平,在微生物活动影响下以内源输入为主。腐殖质物质与TDS、Ec、K^(+)、Mg^(2+)等水化学指标显著相关;类蛋白色氨酸、类蛋白酪氨酸与微生物作用关系密切,可作为评价岩溶水系统生态及脆弱性的指标。Dissolved organic matter(DOM)plays an important role in the biochemical cycle of karst water systems.In this paper,the karst water system of Jinan spring,a typical karst area in North China as well as an important source of drinking water in Jinan,was selected as the research area.In the southern part of the area,the metamorphic rocks of the Taishan Group of Archean Eonothem are exposed.The carbonate rock strata of the Cambrian and Ordovician,which incline toward the north with monoclinic structures and are hidden under the Quaternary in the north part,are located above the metamorphic rocks.The regional groundwater flows from south to north under the control of topography.The main aquifers in the sampling area of this study are the middle Cambrian Zhangxia Formation,the upper Cambrian Fengshan Formation and the Ordovician aquifers,which contain carbonate fissure water with lithology mainly composed of limestone,dolomite limestone and argillaceous limestone.According to the hydrogeological conditions in the source area and the formation process of the source,the study area was successively divided into the indirect recharge area(IRA),direct recharge area(DRA)and discharge area(DA)from south to north.The direct recharge area can directly be recharged by surface water leakage.In the indirect recharge area,recharged by atmospheric precipitation,surface water and groundwater flows into the direct recharge area in the form of surface and subsurface runoffs.Groundwater was blocked by magmatic rocks in the north,and fissures were developed in the contact zone between aquifers and the magmatic rocks,where karst groundwater rose and was exposed,and springs came into being.This study aims to investigate the spectral characteristics,spatial distribution and indicator of DOM in karst groundwater in recharge,runoff and discharge areas at a spring-area scale.The composition,source and spatial distribution in the karst water system of Jinan spring were analyzed by absorption spectrum,fluorescence spectrum and PARAFAC,combined w

关 键 词：溶解性有机质 光谱特性 空间分布 荧光组分 济南泉域 

分 类 号：P641.3[天文地球—地质矿产勘探]