RP图及RQA分析法在滨海浅层地下水研究中的应用

发布时间：2019-04-25 09:27

【摘要】：以海南东北部滨海浅层地下水的逐时水位、电导率和地表气压监测数据为基础,利用RP图和RQA分析法对地下水系统的内部动力结构进行研究,分析ε和RR的取值对地下水系统比较结果的影响,并对台风过境引发的地下水系统内部动力结构的改变进行了相应的探讨。研究结果表明:(1)ε的取值对气压子系统的影响较小,但会明显放大或缩小水位和电导率子系统之间的差异性,尤其是电导率子系统,可能导致比较结果完全相反。(2)气压和水位子系统均具有漂移和破碎两种拓扑结构,电导率子系统则以破碎结构为主,部分兼具漂移结构。(3)当台风过境并产生影响时,地表气压出现明显的极小值,而地下水位则相应的出现极大值,RP图上表现为白色带状区域的出现。带状区域的边界可能暗示了台风影响的起止时间,而区域宽度则可能表征了台风的影响时长。此外,个别电导率子系统也相应出现了白色带状区域,很有可能意味着其也受到了过境台风的影响。(4)对于地下水系统而言,其层流态总是比确定性更为显著,系统的平均可预测长度则总是大于"特定状态"的受困时间,表明基于相邻轨道进行预测会获得更长的预见期。
[Abstract]:Based on the hourly water level, electrical conductivity and surface pressure monitoring data of shallow groundwater in the northeastern coastal area of Hainan Province, the internal dynamic structure of groundwater system is studied by means of RP diagram and RQA analysis. The influence of 蔚 and RR values on the comparison results of groundwater system is analyzed, and the changes of internal dynamic structure of groundwater system caused by typhoon transit are discussed. The results show that: (1) the value of 蔚 has little effect on the air pressure subsystem, but it will enlarge or decrease the difference between the water level and the conductivity subsystem, especially the conductivity subsystem. (2) both air pressure and water level subsystems have two topologies, drift and fragmentation, while electrical conductivity subsystems are dominated by broken structures. Some of them have drifting structure. (3) when typhoon passes through and has influence, the surface pressure appears obvious minimum value, and the corresponding maximum value of groundwater level appears. The RP chart shows the appearance of white banded area. The boundary of the zonal region may indicate the onset and stop time of typhoon influence, while the region width may indicate the duration of typhoon influence. In addition, some electrical conductivity subsystems also appear white banded regions, which may well mean that they are also affected by transit typhoons. (4) for groundwater systems, the laminar flow patterns are always more significant than deterministic ones. The average predictable length of the system is always longer than the trapped time of the "specific state", indicating that the prediction based on adjacent orbits will obtain a longer prediction period.
【作者单位】：国土资源部广州海洋地质调查局;广州市海珠区气象局;
【基金】：中国地质调查局基金(1212010914020)
【分类号】：P641;P731

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