三门湾海岸带第四系地下水资源

张志忠; 曹珂; 吕胜华; 周宇渤; 印萍; 李昂; 高飞

doi:10.12284/hyxb2022151

三门湾海岸带第四系地下水资源

doi: 10.12284/hyxb2022151

张志忠^{1, 2,},
曹珂¹,
吕胜华¹,
周宇渤³,
印萍¹,
李昂³,
高飞¹

1.
青岛海洋地质研究所，山东青岛 266237
2.
青岛海洋科学与技术试点国家实验室海洋矿产资源评价与探测技术功能实验室，山东青岛 266237
3.
浙江省水文地质工程地质大队，浙江宁波 315012

基金项目: 国家自然科学基金（41172228）；中国地质调查项目（DD20190237，DD20221775）；自然资源部华东海岸带野外科学观测研究站项目（ORSECCZ2022102）

详细信息

作者简介:
张志忠（1965-），男，河北省保定市人，博士，研究员，研究方向为海岸带水文地质和环境地质。 E-mail：zhangzzcy@163.com

中图分类号: P748; P641.7
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出版历程
- 收稿日期: 2021-12-22
- 修回日期: 2022-05-29
- 网络出版日期: 2022-08-10
- 刊出日期: 2023-01-17

The study on Quaternary groundwater resources in Sanmen Bay coastal zone

1.
Qingdao Institute of Marine Geology, Qingdao 266237, China
2.
Laboratory for Marine Mineral Resources, Pilot National Laboratory for Marine Science and Technology (Qingdao), Qingdao 266237, China
3.
Zhejiang Institute of Hydrogeology and Engineering Geology, Ningbo 315012, China

摘要

摘要: 利用三门湾海岸带最近施工完成的水文地质孔、工程地质孔和地下水碳（¹⁴C）测年以及前人的分析研究资料，对三门湾海岸带第四系分布、第四系承压含水层富水性和咸淡水资源分布、承压水年龄和可更新能力进行了深入研究。三门湾海岸带蛇盘滩涂围垦区第一承压含水层（组）富水性较好，绝大部分地区为淡水；宁海县长街镇区域承压水淡水资源总体呈“人”字型分布，北部的大湖−车岙港区域淡水主要分布在第一承压含水层（组）中，在大湖−下洋涂区域淡水主要分布在第二承压含水层（组）中。三门湾海岸带第四系承压水年龄普遍较老。蛇盘滩涂围垦区第一承压含水层地下水年龄为21 642～22 012 cal a BP，未受到后期海侵作用影响；长街下洋涂滩涂围垦区第二承压含水层地下水的年龄为35 052～45 439 cal a BP，部分地段受到后期海侵影响。在目前未开采利用条件下，承压水补给条件差、水资源更新性差。对于拟作为应急供水水源地靶区，应加强地下水资源管理。
- 咸淡水分布 /
- 地下水年龄 /
- 可更新能力 /
- 三门湾海岸带
Abstract: Quaternary distribution, Quaternary confined aquifer productivity, distribution of freshwater and seawater resources, confined groundwater age and renewability are further studied based on recently completed hydrogeological borehole, engineering pores and AMS ¹⁴C dating combined with previous data. The first confined aquifer productivity in Shepan tideland reclamation area of Sanmen Bay coastal zone is better, most of groundwater is fresh water. As a whole, freshwater resources of confined aquifer at Changjie Town of Ninghai County are distributed by herringbone patterns. Freshwater resources are mainly distributed in first confined aquifer at Dahu-Cheaogang of north Changjie Town, and freshwater resources are mainly distributed in second confined aquifer at Dahu-Xiayangtu of Changjie Town. The Quaternary confined aquifer ages are generally older. The groundwater ages of the first confined aquifer in Shepan tideland reclamation area are 21 642−22 012 cal a BP, the groundwater is not affected by late transgression. The groundwater ages of the second confined aquifer in Xiayangtu tideland reclamation area are of Changjie Town are 35 052−45 439 cal a BP, the groundwater in partial site is affected by late transgression. Under present unexploited conditions the condition of confined groundwater recharge is bad, the renewability of groundwater resources is not good. Therefore, the management of groundwater resources should be strengthened in emergency water source.
- distribution of freshwater and seawater resources /
- groundwater ages /
- renewability /
- Sanmen Bay coastal zone

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图 1 三门湾海岸带第四系厚度分布

Fig. 1 Thickness distribution of quaternary in Sanmen Bay coastal zone

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图 2 三门湾海岸带第四系承压水资源和年龄分布

Fig. 2 The distribution of Quaternary confined groundwater resources and ages in Sanmen Bay coastal zone

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图 3 水文地质剖面（A–A′）

Fig. 3 Hydrogeological profile (A–A′)

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图 4 水文地质剖面（B–B′）

Fig. 4 Hydrogeological profile (B–B′)

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表 1 蛇盘滩涂围垦区第一承压含水层地下水年龄

Tab. 1 Groundwater ages of the first confined aquifer in Shepan tideland reclamation area

样号	¹⁴C/a BP	日历年龄/（cal a BP）		含水层位置/m	水化学类型	矿化度/（g·L⁻¹）
样号	¹⁴C/a BP	中值	范围（2σ）	含水层位置/m	水化学类型	矿化度/（g·L⁻¹）
SW02	17 820	21 642	21 397～21 915	49.2～63.0	Cl·HCO₃-Mg·Ca·Na	0.769
SW03	18 060	22 012	21 807～22 201	45.6～59.5	Cl·HCO₃-Na·Mg·Ca	0.815
SW11	17 560	21 199	20 962～21 412	51.4～81.0	HCO₃-Na	0.506

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表 2 长街镇下洋涂围垦区第二承压含水层地下水年龄

Tab. 2 Groundwater ages of the second confined aquifer in Xiayangtu, Changjie town tideland reclamation area

样号	¹⁴C/a BP	日历年龄/（cal a BP）		含水层位置/m	水化学类型	矿化度/（g·L⁻¹）
样号	¹⁴C/a BP	中值	范围（2σ）	含水层位置/m	水化学类型	矿化度/（g·L⁻¹）
SW7	30 710	35 052	34 500～35 634	91.0～96.5	Cl·HCO₃-Na	1.411
SW13	42 860	45 439	43 822～47 588	98.1～110.5	HCO₃·Cl-Na	0.84

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