EVOLUTION TREND AND HOT ISSUES OF GROUNDWATER ENVIRONMENT RESEARCH IN RECENT 40 YEARS BASED ON EMOTIONAL BEHAVIOR CHANGES: A SUMMARY OF SCIENTIFIC ECONOMETRIC ANALYSIS FROM 1981 TO 2021
Authors: Ding Yueqing , Lei Kaiqi , Yang Jianhua 
Published: July 2022

Abstract

Background
Groundwater pollution has become an important factor restricting regional economic development and environmental protection. The prevention and control of groundwater pollution has always been the focus of water resources management scholars. The purpose of this study is to systematically evaluate the knowledge system of groundwater pollution prevention and control from 1981 to 2021, and to explore the research trend and hot spots of groundwater pollution prevention and control knowledge system. And the emotional and behavioral changes of water conservancy workers.

Topics and Methods
In the field of groundwater environment from 1981 to 2021, taking “science network” (WOS) as the literature source database, the literature system and bibliometric characteristics were studied by means of bibliometrics, knowledge atlas and collaborative research. Occurrence analysis. This paper attempts to evaluate and sort out the similarities and differences between frontier hotspots and evolution trends in the field of groundwater environment. At the same time, the emotional behavior of water conservancy workers in various places was investigated. In order to investigate the regulation of psychological expectation on the emotional arousal effect of negative stimulation and its corresponding neural mechanism when excluding any cognitive strategy involvement in the emotional expectation stage. It is intended to mainly manipulate the predictability (predictable / unpredictable) and potency (negative / neutral) of the target stimulus. The experimental task is the expected stage from the emergence of the negative cue to the presentation of the negative target. The subjects are required to only pay attention to the fixation point in the center of the screen after watching the negative cue and do not take any coping strategies for the subsequent negative stimulus. In order to eliminate the fatigue effect, the experiment is divided into four sections. At the end of each section, the subjects took a proper rest, and then tested the success degree of the subjects following the experimental guidance requirement of “only pay attention to the fixation point from the presentation of the cord stimulus to the appearance of the target stimulus”, and scored with a 5-point scale (1 = very unsuccessful, 5 = very successful) to evaluate the success degree of non cognitive manipulation. 36 healthy subjects, 18 men and 18 women, were recruited to rule out possible gender differences in the process of emotional expectation (Galli et al., 2011). All subjects filled in the state trait anxiety questionnaire and Beck depression questionnaire before participating in the experiment to eliminate the possibility of anxiety disorder or depressive tendency. The experiment intends to simultaneously record the activity level of peripheral physiological indexes such as event-related brain potential (ERP), skin electricity, heart rate and skin temperature and frowning electromyography (electromyography index directly related to the negative expression of subjects under negative stimulation), so as to comprehensively reveal how the EEG, peripheral physiological activity level and electromyography activity level related to negative emotion change with expected factors.

Results
Groundwater pollution prevention and control is a general theory in the field of environmental risk of groundwater at home and abroad. There are many core trends in groundwater pollution prevention and control. This paper gives the evolution track, development stage and dynamic change of the research topic.

Conclusion
In recent 40 years, the research on the change law of hot spot migration can be divided into three stages. 2009 is a watershed, and the problem has undergone earth shaking changes. Through the visual analysis of knowledge base system, 12 research hotspots are summarized. Explore the change law of topics in the form of dynamic knowledge map, observe the migration of research hotspots, and provide evidence and discussion for research trends and recent hotspots.

Acknowledgements
Supported by a project grant from Key R&D Program of Shaanxi Province (Grant No. D5140200023) and Xi 'an Geological Survey, China Geological Survey (Grant No.211527180141).