Based on the data of daily precipitation in 11 national ground meteorological observation stations in Jining City from 1981 to 2020,the interdecadal variation,intensity,range and spatial distribution of rainstorms in ...Based on the data of daily precipitation in 11 national ground meteorological observation stations in Jining City from 1981 to 2020,the interdecadal variation,intensity,range and spatial distribution of rainstorms in Jining City were analyzed.The results show that the number of rainstorm days and the total amount of rainstorms in Jining City had significant changes among different decades.There was a continuous upward trend from the 1980s to the early 21 st century and a decrease after the early 21 st century.Rainstorms had distinct seasonal characteristics.They were mainly concentrated in summer,especially in July and August.In terms of spatial distribution,the frequency and intensity of rainstorms in the southeastern regions were significantly higher than those in the northwestern regions.The above results can provide a scientific basis for flood control and disaster reduction in Jining City.展开更多
Based on the observation data of meteorological observation stations in Jining City during 1970-2024,MK mutation test and principal component analysis(PCA)were used to study the evolution characteristics of urban heat...Based on the observation data of meteorological observation stations in Jining City during 1970-2024,MK mutation test and principal component analysis(PCA)were used to study the evolution characteristics of urban heat island intensity(UHII)and the contribution rate of various influencing factors in Jining City over the past 55 years.The results show that from 1970 to 2024,the UHII in Jining City generally rose at a rate of 0.1℃/10 a.On the interannual scale,the correlation between temperature and UHII was most significantly positive.On the seasonal scale,there was a strong negative correlation between wind speed and UHII.PCA reveals that temperature had a significant positive impact on the increase of UHII in Jining City.展开更多
Through analyzing the situation of atmospheric circulation and the variation of meteorological element at the time of dense fog happened on November 10,2005 in Jining,the results indicated that there were abundant wat...Through analyzing the situation of atmospheric circulation and the variation of meteorological element at the time of dense fog happened on November 10,2005 in Jining,the results indicated that there were abundant water vapor,weaker pressure field and wind field,weaker cold air in high altitude,stable stratification in underlying bed and ground was located in the bottom of cold high pressure,all those conditions were beneficial to the generation of dense fog in Jining.展开更多
Samples of near-surface atmosphere dust-fall and different pollution end-members were collected in the urban area of Jining City. The element characteristics of the near-surface atmosphere dust-fall and pollution end-...Samples of near-surface atmosphere dust-fall and different pollution end-members were collected in the urban area of Jining City. The element characteristics of the near-surface atmosphere dust-fall and pollution end-members were analyzed systematically and the spatial distribution of the dust-fall and its pollution sources were studied. The results showed that the contents of elements varied obviously in different pollution end-members. The contents of As,Cd,Cu,F,Pb,S and Se within coal dust-fall were the highest,higher than those in atmosphere dust-fall and had great influences on the environment. The contents of Cd,Pb,Se,Zn,Hg and CaO within near-surface atmosphere dust-fall were affected by human activities to different degrees. Results of correlation analysis and factor analysis showed that Cd,Pb,Se and Zn mainly came from enterprise coal consumption,with a contribution ratio of 26. 32%. The contents of the above four elements near chemical factories,steel factories and high populated regions were generally high,which was consistent with the spatial distribution of the coal pollution sources.CaO was related to traffic pollution,with a contribution ratio of 10. 06%. Hg was mainly due to automobile emissions,with a contribution ratio of 8. 12%. The contents of As,Cr,F and Ni within dust-fall were seldom influenced by human activities and mainly came from soil sedimentation( natural sources),with a contribution ratio of 30%. The above four pollution sources( enterprise coal consumption,traffic pollution,automobile emissions and soil sedimentation) were the main sources of atmosphere dust-fall in Jining City. The enrichment coefficients of As,Cr,F and Ni were smaller and the spatial correlations of the four elements were better,while the enrichment coefficients and variable coefficients of elements influenced by human activities,such as Cd,Pb,Se and Hg were larger,and the spatial distributions of these elements were consistent with those of the pollution sources.展开更多
The evaluation system for coal resources was established and a related software was programmed based on some former achievements and actual situation of the research area. And the evaluating calculation and data proce...The evaluation system for coal resources was established and a related software was programmed based on some former achievements and actual situation of the research area. And the evaluating calculation and data processing were also conducted. The result indicates that in the research area, the resource condition of the 3rd lower coal seam falls in the classes of "good" to "middle". In space, the south and the east parts is better than the north and the west parts. And the east part is suitable for the recent and the near future exploitation and the west part for the long dated exploitation. The distribution regularity of geologic structure and the stability of thickness of coal seams should be studied carefully and more exploration project in the west part should be carried out. The above achievements are significant in the exploitation of coal resource in this region.展开更多
Groundwater over-exploitation is a major problem in groundwater development, utilization and protection. At present, the area of shallow groundwater over-exploitation in the High-tech Zone is 76 km^(2). In this study,...Groundwater over-exploitation is a major problem in groundwater development, utilization and protection. At present, the area of shallow groundwater over-exploitation in the High-tech Zone is 76 km^(2). In this study, the system and mechanism construction, engineering measure construction, and control effect of national comprehensive control project of groundwater over-exploitation areas in the High-tech Zone in 2020 were evaluated, and the comprehensive control of groundwater over-exploitation in the High-tech Zone in the year was summarized to provide effective basis for the continuous implementation of comprehensive control of groundwater over-exploitation. At the same time, the water-saving and exploitation reduction effect and generalizability of different measures were studied to provide useful reference for other over-exploitation areas.展开更多
The Shandong Jining Knitting Mill was established in 1958. Since it began cooperating with two Hongkong companies in 1991, it has developed into an all-round knitting enterprise for knitting cotton, wool, and syntheti...The Shandong Jining Knitting Mill was established in 1958. Since it began cooperating with two Hongkong companies in 1991, it has developed into an all-round knitting enterprise for knitting cotton, wool, and synthetic fibre clothing. It also employs mercerizing and singeing technology. The mill has an annual output展开更多
基金the Project of Jining Meteorological Bureau(2023JNZL09).
文摘Based on the data of daily precipitation in 11 national ground meteorological observation stations in Jining City from 1981 to 2020,the interdecadal variation,intensity,range and spatial distribution of rainstorms in Jining City were analyzed.The results show that the number of rainstorm days and the total amount of rainstorms in Jining City had significant changes among different decades.There was a continuous upward trend from the 1980s to the early 21 st century and a decrease after the early 21 st century.Rainstorms had distinct seasonal characteristics.They were mainly concentrated in summer,especially in July and August.In terms of spatial distribution,the frequency and intensity of rainstorms in the southeastern regions were significantly higher than those in the northwestern regions.The above results can provide a scientific basis for flood control and disaster reduction in Jining City.
基金Supported by the Project of Jining Meteorological Bureau(2024JNZL08).
文摘Based on the observation data of meteorological observation stations in Jining City during 1970-2024,MK mutation test and principal component analysis(PCA)were used to study the evolution characteristics of urban heat island intensity(UHII)and the contribution rate of various influencing factors in Jining City over the past 55 years.The results show that from 1970 to 2024,the UHII in Jining City generally rose at a rate of 0.1℃/10 a.On the interannual scale,the correlation between temperature and UHII was most significantly positive.On the seasonal scale,there was a strong negative correlation between wind speed and UHII.PCA reveals that temperature had a significant positive impact on the increase of UHII in Jining City.
文摘Through analyzing the situation of atmospheric circulation and the variation of meteorological element at the time of dense fog happened on November 10,2005 in Jining,the results indicated that there were abundant water vapor,weaker pressure field and wind field,weaker cold air in high altitude,stable stratification in underlying bed and ground was located in the bottom of cold high pressure,all those conditions were beneficial to the generation of dense fog in Jining.
基金Supported by Program of Ecological and Geochemical Survey in the Lower Reach of the Yellow River in Shandong Province(1212010310306)
文摘Samples of near-surface atmosphere dust-fall and different pollution end-members were collected in the urban area of Jining City. The element characteristics of the near-surface atmosphere dust-fall and pollution end-members were analyzed systematically and the spatial distribution of the dust-fall and its pollution sources were studied. The results showed that the contents of elements varied obviously in different pollution end-members. The contents of As,Cd,Cu,F,Pb,S and Se within coal dust-fall were the highest,higher than those in atmosphere dust-fall and had great influences on the environment. The contents of Cd,Pb,Se,Zn,Hg and CaO within near-surface atmosphere dust-fall were affected by human activities to different degrees. Results of correlation analysis and factor analysis showed that Cd,Pb,Se and Zn mainly came from enterprise coal consumption,with a contribution ratio of 26. 32%. The contents of the above four elements near chemical factories,steel factories and high populated regions were generally high,which was consistent with the spatial distribution of the coal pollution sources.CaO was related to traffic pollution,with a contribution ratio of 10. 06%. Hg was mainly due to automobile emissions,with a contribution ratio of 8. 12%. The contents of As,Cr,F and Ni within dust-fall were seldom influenced by human activities and mainly came from soil sedimentation( natural sources),with a contribution ratio of 30%. The above four pollution sources( enterprise coal consumption,traffic pollution,automobile emissions and soil sedimentation) were the main sources of atmosphere dust-fall in Jining City. The enrichment coefficients of As,Cr,F and Ni were smaller and the spatial correlations of the four elements were better,while the enrichment coefficients and variable coefficients of elements influenced by human activities,such as Cd,Pb,Se and Hg were larger,and the spatial distributions of these elements were consistent with those of the pollution sources.
文摘The evaluation system for coal resources was established and a related software was programmed based on some former achievements and actual situation of the research area. And the evaluating calculation and data processing were also conducted. The result indicates that in the research area, the resource condition of the 3rd lower coal seam falls in the classes of "good" to "middle". In space, the south and the east parts is better than the north and the west parts. And the east part is suitable for the recent and the near future exploitation and the west part for the long dated exploitation. The distribution regularity of geologic structure and the stability of thickness of coal seams should be studied carefully and more exploration project in the west part should be carried out. The above achievements are significant in the exploitation of coal resource in this region.
文摘Groundwater over-exploitation is a major problem in groundwater development, utilization and protection. At present, the area of shallow groundwater over-exploitation in the High-tech Zone is 76 km^(2). In this study, the system and mechanism construction, engineering measure construction, and control effect of national comprehensive control project of groundwater over-exploitation areas in the High-tech Zone in 2020 were evaluated, and the comprehensive control of groundwater over-exploitation in the High-tech Zone in the year was summarized to provide effective basis for the continuous implementation of comprehensive control of groundwater over-exploitation. At the same time, the water-saving and exploitation reduction effect and generalizability of different measures were studied to provide useful reference for other over-exploitation areas.
文摘The Shandong Jining Knitting Mill was established in 1958. Since it began cooperating with two Hongkong companies in 1991, it has developed into an all-round knitting enterprise for knitting cotton, wool, and synthetic fibre clothing. It also employs mercerizing and singeing technology. The mill has an annual output
