沈阳黄家傍河水源地河水入渗过程中氧化还原分带规律

在分析沈阳市黄家傍河水源地地质及水文地质条件的基础上，通过场地监测-室内实验相结合的方法，对黄家水源地河水入渗过程孔隙水氧化还原分带规律进行研究.结果表明：辽河河床沉积带在河水入渗途径上存在氧化还原分带，在水流垂向入渗的初始0~20cm、20~80cm、80~90cm及后续范围内依次存在O₂-NO₃^-混和还原带、锰氧化物还原带和铁氧化物还原带；反应中河水中溶解有机碳不能提供足够的电子还原氧化剂，溶解至入渗水流中的沉积物有机碳与河水溶解有机碳一起作为碳源参与了氧化还原反应.

Redox zonation in the process of river water infiltration in the Huangjia riverside well field,Shenyang City

Based on the analysis of hydrogeological conditions and geological formations in the Huangjia riverside well field, Shenyang City, the redox zonation during water infiltration process was integrally studied on the basis of in-situ monitoring together with indoor experiments. Our study reveal that regular patterns of the redox zonation along the river water infiltration do exist in the riverbed sediments of Liaohe River.Successive arrangements of O₂-NO₃^- mixed reduction zone, mangne-oxide reduction zone and iron-oxide reduction zone are found embedded in the depth of 0~20cm, 20~80cm, 80~90cm in the riverbed. It is implied that dissolved organic carbon (DOC) from the river water could not provide enough electrons as the reduction oxidants. DOC in river and the dissolved sedimentary organic carbon (SOC) involve in the redox reaction as carbon sources together.