浅谈区域自动气象站状态监控与异常识别

利用广西加密自动气象站数据查询系统和数据的连续性、逻辑性进行判别自动气象站运行状态与数据异常状况。     

大柏舍地电台映震能力初析

分析了大柏舍地电台１８年的有效观测资料，研究了ρｓ异常变化与周围一定范围内发生的Ｍｓ≥４．０级地震的对应关系，评价了该台的映震能力，结果表明，在所发生的１３次Ｍｓ≥４．０级地震中，有１０次地震前观测到了明显的ρｓ异常变化，其中Ｍｓ≥４．３级地震，都有ρｓ前兆反应，５次５级以上地震尤为显著，表明该台具有较强的映震能力。     

Hydrodynamic characteristics of a typical karst spring system based on time series analysis in northern China

In order to study the hydrodynamic characteristics of the karst aquifers in northern China, time series analyses (correlation and spectral analysis in addition with hydrograph recession analysis) are applied on Baotu Spring and Heihu Spring in Jinan karst spring system, a typical karst spring system in northern China. Results show that the auto-correlation coefficient of spring water level reaches the value of 0.2 after 123 days and 117 days for Baotu Spring and Heihu Spring, respectively. The regulation time obtained from the simple spectral density function in the same period is 187 days and 175 days for Baotu Spring and Heihu Spring. The auto-correlation coefficient of spring water level reaches the value of 0.2 in 34–82 days, and regulation time ranges among 40–59 days for every single hydrological year. The delay time between precipitation and spring water level obtained from cross correlation function is around 56 days for the period of 2012–2019, and varies among 30–79 days for every single hydrological year. In addition, the spectral bands in cross amplitude functions and gain functions are small with 0.02, and the values in the coherence functions are small. All these behaviors illustrate that Jinan karst spring system has a strong memory effect, large storage capacity, noticeable regulation effect, and time series analysis is a useful tool for studying the hydrodynamic characteristics of karst spring system in northern China.© 2021 China Geology Editorial Office.     

Evaluation of the mussel Perna perna as a biomonitor of polycyclic aromatic hydrocarbon (PAH) exposure and effects

The mussel Perna perna was used to monitor and assess areas suspected of oil contamination by transplanting animals from unimpacted to impacted sites and vice versa. The deployment lasted for three months during which total PAH were measured in seawater samples collected every 15 days. PAH concentrations were determined in mussel tissue monthly. The lysosomal neutral red assay and the condition index were used as biomarkers of the adverse biological effects. The PAH concentration in mussels at unimpacted sites, prior to deployment was ca. 100 microg kg(-1) but increased to 300 microg kg(-1) after three months at the contaminated site. Mussels transplanted to the uncontaminated site showed a decrease from 380 to 80 microg kg(-1). Significant changes in lysosomal stability occurred within one month of the beginning of the transposition; in contrast condition indexes were not correlated with the observed changes in PAH concentration.     

市政管道状况评价技术研究

本文首先对管道缺陷状况进行了总结分类,并对管道缺陷状况评价方法进行了探讨,以此为基础,用VB6．0开发了相应的管道状况评价软件,然后,采用层次分析法对管道各类缺陷严重性进行了分析,得出管道修复优先次序,为市政管道的评价与维护提供了一定的参考意见。     

模拟地震环境土钉墙基坑支护设计研究

根据土体边坡滑动面破坏模式,拟静力法,在稳定性模型的假定条件下,建立地震作用下土钉支护边坡稳定性模型,并对云南映象中水处理厂的基坑土钉墙支护进行了计算,得到满意结果。     

依据潜水动态资料确定水文地质参数

本文利用陕西省礼泉县宝鸡峡东干渠茨林地段潜水动态观测资料,通过建立水文地质模型和数学模型的途径,采用配线法求得压力传导系数a和给水度μ,然后再以公式计算法或相关模型法及断面流量法求得渠道渗入系数β。确定结果:该地段潜水含水层的压力传导系数平均值为1051.2m~2/d;给水度变化于0.0364—0.0546之间,最后取值为0.05;渠道渗入系数变化于1.14×10~(-4)—1.14×10~(-1),最后取值为1.14×10~(-1).     

全球生态系统服务的状况与趋势

简要介绍了千年生态系统评估（MA）状况与趋势工作组的报告《生态系统与人类福祉：现状与趋势》中的第2部分，即“对生态系统服务的评估”。该部分主要对全球生态系统服务在20世纪末的总体状况，以及它们在20世纪后半叶的主要变化趋势进行了评估。评估结果表明，在MA明确评估的24项服务中，15项处于下降趋势，约占60%；4项处于上升趋势，约占18%；其余5项（约占22%）存在显著的空间或时间差异，即在有些地区（时段）处于上升趋势，而在另外一些地区（时段）处于下降趋势。这些变化主要表现在：①全球谷类作物和牲畜等方面的生态系统服务已经取得了显著的提高，但同时却对淡水资源和调控害虫等方面的服务造成了巨大的损害；② 按照当前的捕捞速度，野生鱼类资源已经无法承受人类的持续捕捞；③ 许多地区的淡水资源已经不能满足人类和生态系统的需求，如果延续当前的水资源利用模式，供需之间的差距将会继续扩大；④ 在对污染物质进行无害化处理、保持养分平衡、调控自然灾害，以及控制害虫、疾病与入侵生物的爆发等方面，许多生态系统的调节服务已经呈现出明显的下降趋势；⑤作为生态系统提供供给服务、调节服务和文化服务的基础条件，全球生态系统的支持服务出现了复杂的变化趋势。     

施甸由旺镇岩层含水性及其开发

由旺镇属于水源缺乏区,通过水文地质勘察,查明区内具有地下水赋存条件并具备供水条件。含水地层及水构造发育,有利于地下水富集。     

晋江市规划区地下水调查初探

本文通过在晋江市规划区开展抗震防灾基础调查工作中的地下水调查工作,总结在抗震防灾规划基础调查工作中对地下水专项调查的工作方法、重点及成果介绍。