莱州湾南岸海（咸）水入侵数值模拟

发布时间：2018-05-23 15:07

本文选题：莱州湾 + SEAWAT　；参考：《中国地质大学(北京)》2015年硕士论文

【摘要】：地下水资源是经济社会可持续发展的重要自然资源,已经成为当今学术界的一个研究热点。昌邑市位于山东省莱州湾南岸,由于过量开采地下淡水资源和深层卤水资源,在研究区内已经形成了淡水漏斗和卤水漏斗,因此海(咸)水不断的向内陆入侵,这里是我国海(咸)水入侵研究的典型区域。海(咸)水入侵不仅造成地下淡水咸化,使区域淡水资源可利用量减少,同时也使地区环境的承载力持续降低。海水入侵现象的本质是沿海地区咸淡水界面处的静水压力遭到破坏,海水顺着含水层入侵内陆的现象。海水的向陆移动会使内陆土壤盐渍化,也破坏了内陆淡水水源地,同时也给当地居民带来了生活上的困难和经济上的损失。海水入侵现象如果发生,通常情况下会经历初始、加剧、减缓这三个阶段,这种现象的发生也需要具备两个先决条件,就是水动力条件和水文地质条件。在充分搜集研究区已有水文地质及其相关资料基础上,查明研究区水文地质条件并将其概化为含水层组;利用地下水数值模拟软件SEAWAT建立其2013.1.1~2013.12.31时段的地下水流数值模型;采用试估—校正法对模型识别校正;并利用2014.1.1~2014.4.31时段的源汇项对识别后的水文地质结构、参数及边界类型进行验证。以识别和验证后的水文地质结构、参数及边界类型为基础,引入预测期源汇项后,又建立了水源地2014.1.1~2021.12.31时段的预测模型。利用预测模型求得模拟区多年平均年补给量为34309×104kg/a,多年平均排泄量为33936×104kg/a。模型模拟末2021.12.31,3g/l的矿化度线以约400m/a速率向陆推移,浅层淡水咸化速度快,严重影响了农业和生活用水量。
[Abstract]:As an important natural resource for sustainable development of economy and society, groundwater resources have become a research hotspot in the academic circle. Changyi city is located on the South Bank of Laizhou Bay in Shandong province. Due to overexploitation of underground fresh water resources and deep brine resources, a light water funnel and a brine funnel have been formed in the study area. Therefore, the sea (salty) water is constantly being developed. The invasion of the sea (salty) water in China is a typical area. The sea (salty) water intrusion not only causes the salinity of the underground water, but also reduces the amount of fresh water resources in the region. At the same time, the carrying capacity of the regional environment is continuously reduced. The essence of the seawater intrusion phenomenon is that the hydrostatic pressure at the salt and freshwater interface in the Haiti area is destroyed. The movement of water along the aquifer invaded the inland. The land movement of the sea water will make inland soil salinized, and it also destroys the inland water source. It also brings the local residents with the difficulties in life and the economic loss. If the seawater intrusion occurs, it will usually begin, aggravate and slow down these three stages. It also needs two prerequisites, namely, hydrodynamic conditions and hydrogeological conditions. On the basis of fully collecting hydrogeology and related data in the study area, the hydrogeological conditions of the study area are ascertained and generalized into aquifer group, and the ground water numerical simulation software SEAWAT is used to establish its 2013.1.1~2013.12.31 period. The water flow numerical model is used to verify the model recognition and correction by using the test correction method. The hydrogeological structure, parameters and boundary types are verified by the source and sink of the 2014.1.1~2014.4.31 period. The hydrogeological structure, parameters and boundary types are identified and verified, and the water and sink terms are introduced, and the water is also established. The prediction model of the 2014.1.1~2021.12.31 period in the source area is used to obtain the annual average annual recharge of 34309 x 104kg/a in the simulated area, and the average annual excretion of 33936 x 104kg/a. model simulation end 2021.12.31,3g/l mineralization line is about 400m/a rate to land, and the shallow fresh water saltization speed is fast, which seriously affects agricultural and living use. Water.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：P731.2;P641.8

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