| 黄河三角洲浅层地下水位年内变化特征及影响因素 |
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| 引用本文： | 常茂祥,史经昊,叶思源,王祥东,李广雪.黄河三角洲浅层地下水位年内变化特征及影响因素[J].海洋科学,2021,45(10):20-31. |
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| 作者姓名： | 常茂祥 史经昊 叶思源 王祥东 李广雪 |
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| 作者单位： | 海底科学与探测技术教育部重点实验室(中国海洋大学)；中国海洋大学海洋地球科学学院,青岛蓝色地球大数据科技有限公司,自然资源部青岛海洋地质研究所,青岛蓝色地球大数据科技有限公司,海底科学与探测技术教育部重点实验室(中国海洋大学)，中国海洋大学海洋地球科学学院 |
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| 基金项目： | 国家重点研发计划政府间重点专项项目(2017YFE0133500)；泰山学者建设工程专项 |
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| 摘 要： | 基于黄河三角洲地区3个站位的1小时一次的浅层地下水位连续观测记录，将浅层地下水位与同时期ERA5高分辨率再分析实际蒸发量数据结合，并联合潮位、降水量和径流量等数据，通过快速傅里叶变换、时序分析等方法，分析并阐明了黄河三角洲地区浅层地下水位变化的特征及机制。结果表明：（1）不同的沉积环境导致了浅层地下水位整体变化的差异。表层沉积物渗透性相对较强区域，浅层地下水位波动剧烈；而表层沉积物透水性较差地区，浅层地下水位在6月中上旬存在低谷，但总体相对稳定；（2）潮汐对黄河三角洲浅层地下水位在水平方向的影响范围至少可达7km，但不超过15km。在其影响区域内，浅层地下水位波动滞后于潮汐的时间存在年内变化，分为两个时间上持续各6个月的区间，二者数值相差约12h；（3）降水量与实际蒸发量是黄河三角洲浅层地下水位升降最主要的影响因素。此外，农业活动也对浅层地下水位的变化有一定影响。对黄河三角洲浅层地下水位变化规律研究，能够为本地区土地盐碱化、海水入侵灾害防治与生态保护提供科学依据。
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| 关 键 词： | 黄河三角洲 浅层地下水位 潮汐 滞后性 降水量 实际蒸发量 |
| 收稿时间： | 2020/11/10 0:00:00 |
| 修稿时间： | 2021/3/2 0:00:00 |
Dynamic characteristics and causes of shallow groundwater level intra-annual changes in the Yellow River Delta |
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| CHANG Mao-xiang,SHI Jing-hao,YE Si-yuan,WANG Xiang-dong,LI Guang-xue.Dynamic characteristics and causes of shallow groundwater level intra-annual changes in the Yellow River Delta[J].Marine Sciences,2021,45(10):20-31. |
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| Authors: | CHANG Mao-xiang SHI Jing-hao YE Si-yuan WANG Xiang-dong LI Guang-xue |
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| Institution: | Key Lab of Submarine Geosciences and Prospecting Techniques(Ocean University of China), Ministry of Education, Qingdao 266100, China;College of Marine Geosciences, Ocean University of China, Qingdao 266100, China;Qingdao Blue Earth Big Data Technology Co., Ltd, Qingdao 266400, China;Qingdao Institute of Marine Geology, Ministry of Natural Resources of the People''s Republic of China, Qingdao 266071, China |
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| Abstract: | Based on continuous monitoring records of 3 monitoring wells in the Yellow River Delta, this paper combines hourly shallow groundwater level data with contemporarily high-resolution ERA5 reanalysis actual evaporation data, together with other data such as tide, precipitation and runoff statistics of the Yellow River, adopting methods including fast Fourier transform and time series analysis, to analyze and illustrate the characteristic and mechanics of shallow groundwater level fluctuation. The results of analysis show that: (1) the variety of sedimentary environment leads to the difference of the general condition of groundwater level. In the area that surface layer sediment has relatively good permeability, shallow groundwater level fluctuation is more violent and frequent. When the permeability of the surface layer sediment is relatively weak, the shallow groundwater level reaches a striking minimum in early June, but displays a stable condition in general; (2) the horizontal scope of tidal influence on shallow groundwater level in the Yellow River Delta could reach 7km but no more than 15km. Within that scope, the time lag between shallow groundwater level fluctuation and tide is not constant during the year 2009, it can be divided into two 6-month intervals between which a 12 hour difference stands; (3) precipitation and actual evaporation are the fundamental factors in causing shallow groundwater level rise and fall in the Yellow River Delta. Agricultural activities also have certain effect on shallow groundwater level. The research on shallow groundwater level dynamics could provide a scientific basis for ecological protection, prevention and control of local land salinization and seawater intrusion. |
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| Keywords: | the Yellow River Delta shallow groundwater level tide hysteresis precipitation actual evaporation |
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