采用 2016 年 8 月采集的 192 个地下水样品水化学数据, 查明了穆棱河) 兴凯湖平原( 穆兴平原) 北区第四系 浅层地下水溶解性总固体( T DS ) 和地下水化学类型分布特征, 并结合研究区水文地质条件和人类活动影响分析其 形成原因。结果表明: 穆兴平原北区浅层地下水主要以 TDS 小于 01 5 g / L 的淡水为主, 未见 TDS 大于 11 0 g / L 的 微咸水。地下水 TDS 受含水介质、溶滤作用和地表水- 地下水交互作用影响, 在区内呈多种分带规律。区内浅层 地下水化学类型不具备明显的水平分带规律, 主要以 H CO32Ca# Mg 型水为主, 与人为活动较少的 20 世纪 60 年代 背景水化学类型( H CO32Ca# Na 型水) 对照, 地下水中硫酸根、氯离子及镁离子的增加与煤矿开采、生活用水污染及 大范围农业施肥等人类活动相关。

We studied the distribution characteristics o f to tal disso lved so lids ( TDS) and hydro chemical ty pes of shallow gr ound2 w ater in the Muling2Xingkai Plain on the basis of analy zing 192 gr oundw ater samples. Then w e explo red the cause of fo rmatio n by co nsidering the hy drog eolog ical conditions and human act ivities. The results showed that the shallow gr oundwat er in the study ar ea w as mainly fresh w ater w ith T DS less than 01 5 g/ L, and ther e w as no saline g ro undwater w ith TDS higher than 11 0 g/ L. Influenced by aquifer medium, leaching, and g r oundwater2river interaction, the gr oundwat er TDS showed zonal distributio n in the study area. T her e w as no obvio us zo nal distribut ion r egularity o f the hy dr ochemical types in the study area. Nowadays, the HCO32Ca# Mg type water has r eplaced the H CO32Ca# Na ty pe w ater in the 1960 s ( considered as backg ro und water t ype) to become the common w ater ty pe in the study area. T he incr eases of sulfate ion, chlo ride io n, and mag nesium ion in g ro undw ater wer e mainly due t o coal mining, domestic w astewater po llution, and fertilizatio n

中国地质调查局地质调查项目 ( DD20160311) ; 河北省自然科学基金项目 ( D2018504011)