| 张太平,王奎锋,王强,李静,王薇.黄河三角洲水盐演化及补给来源——基于水化学与同位素分析[J].干旱地区农业研究,2019,37(4):231~239 |
| 黄河三角洲水盐演化及补给来源——基于水化学与同位素分析 |
| Evolution characteristics and recharge sources of water and salt in the Yellow River Delta — Based on water chemistry and isotope analysis |
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| DOI：10.7606/j.issn.1000-7601.2019.04.31 |
| 中文关键词: 黄河三角洲 地表水 浅层地下水 水化学 水盐演化 同位素分析 |
| 英文关键词:Yellow River Delta surface water shallow groundwater hydrochemical characteristics water salt evolution isotope analysis |
| 基金项目:国家自然科学基金（41602356）；中国博士后基金（2017M622240）；山东省地勘基金（鲁勘字2013（55）号，鲁勘字2016（7）号）；山东省重点研发计划项目（（GG201712050002）；中国科学院青年创新促进会项目（2017073） |
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| 中文摘要: |
| 对河口地区地表水和浅层地下水采样调查，结合离子全组分和稳定同位素证据，分析了研究区水化学特征与各水体补给来源，探讨了长期引黄灌溉对区域水循环、地表水-地下水交换的影响。结果显示：(1)河口区地表水与浅层地下水都具有较高的矿化度，浅层地下水与地表水平均矿化度分别为27.96、23.17 g·L-1，地表水和浅层地下水中阳离子Mg2+、Na+、K+，阴离子Cl-、SO2-4是与总溶解固体(TDS)显著相关的主要离子成分；(2)浅层地下水水化学类型为Cl-Na·K，是典型的海水混合或者卤水；地表水由于工、农业和城市污染，水化学类型向Cl·SO4-Na·K·Ca变化，水化学类型变化复杂；(3) 地表水水体的盐分补给来源于海水混合以及城市及农业污染，而浅层地下水的输入则来自海水入侵以及降水、地表水的下渗补给；(4) 生态调水后地表水对浅层地下水的补给高值区主要分布在农田和近海湿地，补给比例48%~81%，而海岸滩涂带地下水的补给比例最低，这可能与海岸含水层渗透系数相对农田和湿地较小有关。 |
| 英文摘要: |
| Based on the sampling of the surface water and shallow groundwater in study area and the combination of the data of the ionic species concentration and stable isotopes, the water chemistry characteristics and the main sources of recharge were systemically analyzed to explore the impact of long-term irrigation on regional water cycle and exchange of surface water and groundwater. The results showed that: (1) The salinity degrees of the surface water and shallow groundwater from the estuary were higher, with an average total dissolved solid (TDS) of 27.96 g·L-1 and 23.17 g·L-1, respectively. Cations of Mg2+, Na+, K+, and anions of Cl- and SO2-4 were the main compositions of surface water and shallow groundwater, which had significant positive correlations with TDS. (2) The hydro-chemical type of shallow groundwater was Cl-Na·K, which was a typical seawater or brine type; the water chemical type of surface water was different as Cl·SO4-Na·K·Ca, which was more complicated due to the industrial, agricultural, and urban pollution. (3) Salt supply sources of surface water were attributed to seawater mixed with urban and agricultural pollution, while the high-ratio areas of recharge with shallow groundwater were mainly from the intrusion of seawater and the infiltration of precipitation and surface water. (4) The high-value areas of recharge with the shallow groundwater from the surface water were mainly distributed in farmland and coastal wetlands under ecological water diversion, and the proportion of recharge was 48%~81%. The recharge proportion from the coastal beach with groundwater had the lowest ratio. It may be caused by the low permeability coefficient with coastal aquifer, compared with farmland and wetland. |
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