Hazard Evaluation for Seawater Intrusion in the South of Laizhou Bay

2014 ◽  
Vol 1010-1012 ◽  
pp. 317-320
Author(s):  
Guang Quan Chen ◽  
Wen Quan Liu ◽  
Xing Yong Xu ◽  
Qiao Su
Keyword(s):  
Seawater Intrusion ◽  
Hazard Assessment ◽  
Evaluation Process ◽  
Information Value ◽  
Hazard Evaluation ◽  
Laizhou Bay ◽  
Geological Condition ◽  
The South ◽  
Risk Area ◽  
High Risk Area

Laizhou Bay is the most typical and serious region suffering from the geo-hazard of the seawater intrusion in China. The information value model and GIS are used for the hazard assessment study of seawater intrusion disaster in the Laizhou Bay. The assessment indexes are conceived through choosing the factors such as mineralization, groundwater level, geological condition, intensity of human activities and offshore distance . ArcGIS software is applied involving in data collection, data management, data analysis and evaluation process expressing. Finally, the hazard assessment about seawater intrusion disaster is classed into high, medium and low. The result shows that the boundary between the more dangerous and less dangerous zone is the line of Shouguang-Hanting-Changyi. The high-risk area is accounted for more than 46% of the evaluation area. The saltwater under the south of Laizhou plain is main source of the seawater intrusion disaster, and pumping the underground freshwater and saline groundwater is the induced conditions of the seawater intrusion disaster.

scholarly journals Landslide hazard evaluation based on linear rupture plane method

2020 ◽  
Vol 143 ◽  
pp. 02030
Author(s):  
Min Yang ◽  
Shuping Xiong ◽  
Yue Cao ◽  
Zhaoyang Ling ◽  
Yang Liu ◽  
...  
Keyword(s):  
Evaluation System ◽  
Limit Equilibrium ◽  
Slope Angle ◽  
Landslide Hazard ◽  
Hazard Evaluation ◽  
Risk Area ◽  
High Risk Area ◽  
Plane Method ◽  
Landslide Hazards ◽  
Rupture Plane

In recent years, landslide disasters have occurred frequently, making the evaluation of the susceptibility of landslide hazards a major difficulty and hot topic in current research. The current research focuses on the use of statistical models or information models to analyze landslide hazards. However, the accuracy is not high. We first study the mechanism of landslide geological disasters. Based on this, combined with multi-source geological data, a linear rupture plane method (LRP) is employed to construct the landslide hazard evaluation system. LRP regards the failure surface of the slope as an approximate plane and the section as an approximate straight line. It uses the principle of limit equilibrium to calculate the safety factor of slope. In the paper, the Ziyang area with frequent landslide disasters is taken as the research area. Choosing landslide hazard points in Ziyang County as the sample data, we select seven factors including slope height, slope angle, soil bulk density, soil cohesion, internal friction angle, precipitation intensity and seismic intensity as influencing factors. Based on the LRP, we construct an evaluation system to divide the landslide into three grades: high-risk area, low-risk area and safe area, which provides effective technical support for the early warning and prevention planning of landslide disasters.

scholarly journals Elucidating the Pollution Sources and Groundwater Evolution in Typical Seawater Intrusion Areas Using Hydrochemical and Environmental Stable Isotope Technique: A Case Study for Shandong Province, China

Lithosphere ◽  
2021 ◽  
Vol 2021 (Special 3) ◽  
Author(s):  
Guangquan Chen ◽  
Guiyao Xiong ◽  
Jin Lin ◽  
Xingyong Xu ◽  
Hongjun Yu ◽  
...  
Keyword(s):  
River Basin ◽  
Seawater Intrusion ◽  
Anthropogenic Activities ◽  
Shandong Province ◽  
Pollution Sources ◽  
Laizhou Bay ◽  
The South ◽  
Domestic Activity ◽  
Isotope Technique ◽  
Groundwater Evolution

Abstract Seawater intrusion has a serious impact on industry, agriculture, and people’s daily life. Thus, the present study was designed to elucidate the pollution sources and groundwater evolution in typical intrusion areas of Shandong Province by hydrochemistry and environmental isotope techniques. The water samples were collected to analyze the groundwater evolution under different intrusion, and groundwater evolution in the south of Laizhou Bay from 2005 to 2019. The findings indicated that the groundwater level dropping funnel caused by overexploitation was the direct causation of seawater intrusion in the three typical intruded areas. The groundwater evolution paths demonstrated that the groundwater in the south of Laizhou Bay had the fastest evolution rate and the highest degree of evolution, followed by the Dagu River Basin. The groundwater evolution extent and fitting of mixing lines indicated that the groundwater in the south of Laizhou Bay, Longkou, and Dagu River Basin was dominated by palaeosaltwater intrusion, modern seawater intrusion, and sea-saltwater mixed intrusion, respectively. Palaeosaltwater mixing produces a more severe salinization effect compared to seawater mixing. Meanwhile, the isotopes are gradually enriched with the deepening of intrusion, while the decrease of isotopes is delayed compared with the saltwater retreat. This is caused by that the stable isotopes enriched in the aquiclude due to the chemical permeation effect will be released into the aquifer after the salinity attenuates in the aquifer. The palaeosaltwater intrusion caused by anthropogenic activities has promoted serious fluorine pollution in the south of Laizhou Bay, while the groundwater nitrate pollution in Longkou was the most serious, followed by the Dagu River Basin due to high-density agricultural and domestic activity.

scholarly journals Use of GIS for mapping of ticks and tick-borne pathogens in South Bohemia

Geografie ◽  
2009 ◽  
Vol 114 (3) ◽  
pp. 157-168 ◽  
Author(s):  
Pavel Švec ◽  
Václav Hönig ◽  
Milan Daniel ◽  
Vlasta Danielová ◽  
Libor Grubhoffer
Keyword(s):  
Field Work ◽  
Field Analysis ◽  
Key Factors ◽  
The South ◽  
Risk Area ◽  
Activity Data ◽  
High Risk Area ◽  
Tick Activity ◽  
Current Article ◽  
Selection Of

Ticks and tick-borne diseases (TBD) represent a serious health risk in numerous European countries, including Czechia. The South Bohemian Region is a TBD high-risk area. The aims of the current project are: to map the distribution of ticks and tick-borne diseases in the South Bohemian Region, to identify the key factors determining their distribution and to use the obtained data for creation of a TBD risk prediction model. The current article deals with the use of the geographic information system (GIS) for selection of localities for field work (tick collections, estimation of tick activity). Data sources and methods of their processing are described, examples of the main outputs are presented, further possibilities of GIS use in the project are outlined. The field work confirmed GIS analysis as an efficient approach to identification of appropriate sites for field analysis of tick activity.

Risk Assessment of Geological Hazard in Wudu Area of Longnan City, China

2010 ◽  
Vol 39 ◽  
pp. 232-237 ◽  
Author(s):  
Shou Yun Liang ◽  
Yun Xing Wang ◽  
Yu Wang
Keyword(s):  
Risk Assessment ◽  
Hazard Assessment ◽  
Human Life ◽  
Geological Hazard ◽  
Risk Area ◽  
High Risk Area ◽  
Damage Degree ◽  
Geological Conditions ◽  
Geological Disaster ◽  
Medium Risk

Risk assessment of geological hazard is the study of damage degree of human life and property affected by the geological disaster. It is of great importance for reducing harm level of geological hazard fatalness, preventing and controlling of geological disaster. As an example in Wudu area of Longnan City, we choose topography, lithology, meteorology, hydrology and human activity as the hazard assessment factors, on the basis of detailed investigation of geological conditions in study area. Then, adding the importance of the residents activity area as a risk assessment factor, we have finished the geological hazard assessment and its risk assessment by GIS combined with AHP. The result shows that the proportions of geological hazard risk of non-risk, low-risk, medium-risk and high-risk area are respectively 31%, 14%, 25% and 30%.

Geochemical and isotopic evidence for palaeo-seawater intrusion into the south coast aquifer of Laizhou Bay, China

2011 ◽  
Vol 26 (5) ◽  
pp. 863-883 ◽  
Author(s):  
Dongmei Han ◽  
Claus Kohfahl ◽  
Xianfang Song ◽  
Guoqiang Xiao ◽  
Jilong Yang
Keyword(s):  
Seawater Intrusion ◽  
South Coast ◽  
Laizhou Bay ◽  
The South ◽  
Isotopic Evidence

Periodic monitoring of vampire bats and rabies: a new framework for animal restoration projects in the Neotropics

2020 ◽  
Author(s):  
Fernando Gonçalves ◽  
Daniel G. Streicker ◽  
Mauro Galetti
Keyword(s):  
Disease Transmission ◽  
Lessons Learned ◽  
Multidisciplinary Teams ◽  
Risk Area ◽  
Food Web Structure ◽  
Land Bridge ◽  
High Risk Area ◽  
Restoration Project ◽  
Vampire Bats

Nowadays, restoration project might lead to increased public engagement and enthusiasm for biodiversity and is receiving increased media attention in major newspapers, TED talks and the scientific literature. However, empirical research on restoration project is rare, fragmented, and geographically biased and long-term studies that monitor indirect and unexpected effects are needed to support future management decisions especially in the Neotropical area. Changes in animal population dynamics and community composition following species (re)introduction may have unanticipated consequences for a variety of downstream ecosystem processes, including food web structure, predator-prey systems and infectious disease transmission. Recently, an unprecedented study in Brazil showed changes in vampire bat feeding following a rewilding project and further transformed the land-bridge island into a high-risk area for rabies transmission. Due the lessons learned from ongoing project, we present a novel approach on how to anticipate, monitor, and mitigate the vampire bats and rabies in rewilding projects. We pinpoint a series of precautions and the need for long-term monitoring of vampire bats and rabies responses to rewilding projects and highlighted the importance of multidisciplinary teams of scientist and managers focusing on prevention educational program of rabies risk transmitted by bats. In addition, monitoring the relative abundance of vampire bats, considering reproductive control by sterilization and oral vaccines that autonomously transfer among bats would reduce the probability, size and duration of rabies outbreaks. The rewilding assessment framework presented here responds to calls to better integrate the science and practice of rewilding and also could be used for long-term studying of bat-transmitted pathogen in the Neotropical area as the region is considered a geographic hotspots of “missing bat zoonoses”.

74 Improving Handover Between Doctors and Nurses on An Elderly Care Ward

2021 ◽  
Vol 50 (Supplement_1) ◽  
pp. i12-i42
Author(s):  
K Suseeharan ◽  
T Vedutla
Keyword(s):  
High Risk ◽  
Patient Care ◽  
Positive Impact ◽  
Elderly Care ◽  
Task Completion ◽  
Risk Area ◽  
High Risk Area ◽  
Staff Members ◽  
Care Ward ◽  
Doctors And Nurses

Abstract Background The Royal College of Physician guidelines (2011) identified handover as a “high risk step” in patient care, especially in recent times within the NHS where shift patterns lead to more disjointed care with a high reliance on effective handover by all staff members. Introduction At Cannock Chase hospital, Fairoak ward is an elderly care rehabilitation ward where there is a large multi-disciplinary team. While working on the ward as doctors we noticed that handover between the MDT was poor. Anecdotal evidence from both doctors and nurses felt that this was a high risk area in need of improvement. Aim to improve handover between doctors and nurses on this elderly care ward. Method To measure the quality of current handover practice we did a questionnaire. A total of 12 questionnaires were completed which showed that 92% of staff felt that handover on the ward was very poor and 50% preferred both written and verbal handover. We measured the number of tasks verbally handed over between doctors and nurses over 3 days. On average 65% of the tasks were completed. We then made the below interventions and re-audited to see if there was any improvement. Interventions over 3 week period: Results Questionnaire: Measuring task completion after interventions; Conclusion This project has made a positive change qualitatively and quantitatively to the ward handover practice. Staff satisfaction regarding handover has improved and the number of “handed over” tasks completed daily has significantly improved. The written handover sheet had poor utilisation by staff but in 4 months we are going to re-audit and trial the handover sheet again to further improve service delivery. We hope this improvement will have a positive impact on patient care on this elderly care ward.

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