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| An analysis of research trends about non-point source pollution over the last three decades |
| Received:December 28, 2017 |
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| KeyWord:diffuse pollution;bibliometrics;trend analysis;Cite Space;H-index |
| Author Name | Affiliation | | OUYANG Wei | State Key Laboratory of water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China | | LIU Ying-chun | Beijing Normal University Library, Beijing 100875, China | | LENG Si-wen | State Key Laboratory of water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China | | LIU Hong-bin | Institute of Agricultural Resources and Regional Planning, Chinese Academy of Agricultural Sciences, Beijing 100081, China | | WANG Yi-di | State Key Laboratory of water Environment Simulation, School of Environment, Beijing Normal University, Beijing 100875, China |
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| Abstract: |
| The goal of this research is a brief analysis of the characteristics of nonpoint source (NPS) pollution in the field over the last three decades. We retrieved all the relevant literature from "Web of Science core collection" and chose literature during 1990-2016 during further investigations. Based on Web of Science, we found the main sources of literature and compared the H-index of Chinese scholars and their international peers. Utilizing the "keyword co-occurring analysis" and "co-cited references analysis" functions incorporated in CiteSpace, we analyzed the changes in the most-used keywords (including author keywords and keywords plus) and investigated the most influential references to obtain a better understanding of research trends and the intellectual base in this field. The first recorded research paper about NPS pollution began in 1992 and 1975 in China and abroad, respectively. The Chinese researchers and studies in the Chinese mainland played an increasingly important role in this field. In terms of keywords,"watershed" and "management", "SWAT", "China", and "climate change" appeared in the top 30 keywords in recent years. In terms of the research content, NPS pollution studies ranged from the point scale observation to water quality change, nitrogen and phosphorus pollution output law, and model application at the watershed scale. The simulation, optimization, and application of the hydrological model based on GIS (geographic information system) spatial analysis were the basis of NPS control and evaluation. With the development of research, the management of watersheds, the development and coupling NPS pollution models, and the effect of climate change had received more attention recently. |
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