秦皇岛市沿海地区海水入侵水文特征值变化趋势分析

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英文篇名：Analysis on the Changing Trend of Hydrological Characteristics during Seawater Intrusion in the Coastal Area of Qinhuangdao Urban 作者：赵云峰 英文作者：Zhao Yunfeng;Hebei provincial Qinhuangdao hydrology and water resources survey bureau; 关键词：海水入侵 ; 降水量 ; 径流量 ; 潮位 ; 变化趋势 英文关键词：Seawater intrusion;;precipitation;;runoff;;tide level and the changing trend 中文刊名：SXSN 英文刊名：Shaanxi Water Resources 机构：河北省秦皇岛水文水资源勘测局; 出版日期：2019-04-20 出版单位：陕西水利 年：2019 期：No.219 语种：中文; 页：SXSN201904015 页数：3 CN：04 ISSN：61-1109/TV 分类号：47-49

摘要

秦皇岛市濒临渤海,由于地下水超采及地质因素,沿海地区出现不同程度的海(咸)水入侵。采用1995年～2016年水文统计资料,选取降水量、河道径流量、潮位和地下水开采量四个主要的水文特征值对长系列资料进行分析,与地下水埋深和海水入侵调查资料进行对比。结果表明:秦皇岛沿海河流多为暴涨暴落的山溪性河流,暴雨历时短,强度大,加上一年中,降水主要集中发生在7月、8月,占年径流量的70%左右,且一次洪水的洪量主要集中在24 h内,24 h洪量占3 d洪量的70%以上。大量的地表径流排入大海,地下水得不到充分补给,地下水位持续下降,海水压迫海(咸)水体向内陆延伸。结果可为控制地下水超采、遏制海水入侵、改善地下水环境提供科学依据。
        Qinhuangdao is near the Bohai Sea. Due to the over-exploitation of groundwater and special geological conditions, there are seawater(salty) water intrusion at different level in coastal areas. Based on the hydrological statistics from 1995 to 2016, four major hydrological eigenvalues of precipitation, river runoff, tidal level and groundwater extraction were selected to analyze the long series of data, and compared with groundwater depth and seawater intrusion survey data.The results show that the coastal rivers in Qinhuangdao are mostly mountain rivers with rapid ups and downs. The rainstorms are short-lived and strong. The precipitation mainly occurs in July and August, accounting for about 70% of the annual runoff, and the flood of primary floods is mainly concentrated. Within 24 h, the 24 h flood accounted for more than70% of the 3 d flood. A large amount of surface runoff is discharged into the sea, the groundwater is not fully replenished,the groundwater level continues to drop, and the seawater oppresses the sea(salty) water body to extend inland. It can provide scientific basis for controlling groundwater over-exploitation, curbing seawater intrusion and improving groundwater environment.

引文

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