Seismotectonics of the 26 November 2005 Jiujiang-Ruichang,Jiangxi,Ms 5.7 Earthquake

The 26 November 2005 Jiujiang-Ruichang, Jiangxi, Ms 5.7 earthquake occurred in a seismotectonic setting of moderate earthquake. The northwest-trending Xiangfan-Guangji fault （XFG） does not enter into the epicenter vicinity, but the northeast-trending Ruichang-Wuning fault （RWF） as a regional fault extends to the epicenter nearby, appearing as the Ruichang basin and its marginal faults. Tilting of the Ruichang Basin （RCB） in the Quaternary was controlled by the RCB southeast- marginal, buried fault （RSMBF）. Shallow geophysical survey reveals that the RSMBF caused an offset of the reflection layers. Drill hole columnar section demonstrates that there are about 10-12 m displacement in the lower section of the middle-Pleistocene Series along the RSMBF, but no disruption is found in the upper section of the middle-Pleistocene Series. The RSMBF not only has activity in the Quaternary, but also coincides with the nodal plane I from the focal mechanism of the Jiujiang- Ruichang Ms 5.7 earthquake. This evidence, including aftershock distribution and isoseismic lines, strongly suggests that the RSMBF might be the seismogenic tectonics. The RWF is discontinuous at the surface, and consists of three en echelon Quaternary basins, which are the Ruichang, Fanzhen and Wuning basins. Three moderate earthquakes, the Fanzhen ML 4.9 earthquake, the Yejiapu ML 4.1 earthquake and the Jiujiang-Ruichang Ms 5.7 earthquake, have happened in the basins since 1995. The seismogenic tectonics of the Jiujiang-Ruichang Ms 5.7 earthquake is not isolated, but may be controlled by the RWF at depth, the slip of which causes the accumulation of energy for earthquake occurrence.

Causes of Continuous Haze Pollution in Jiujiang City

The causes of persistent haze pollution in Jiujiang City from the end of November to the beginning of December 2016 are analyzed. The results show that there were three main long-distance paths to transport fine particles to Jiujiang. The upstream guide wind and the local static weather conditions made local pollutants superimposed on the particulate matter. The first source emission and two conversion of different inorganic pollutants contributed to the increase in the concentration of particles in Jiujiang. High temperature and high humidity could promote the formation of two organic particles. But when temperature was low in winter,the increase of energy consumption made local source emission increase. The high molecular weight semi-volatile organic compounds in the air were adsorbed on the surface of the particles,and the haze was gradually formed through the process of hygroscopic growth and the aging of particles. Jiujiang's natural landform,the " valley wind" circulation effect of dominant wind,and the radiation effect of aerosol were favorable for the accumulation of pollutants in Jiujiang.

Analysis of a Cold Wave Process in Jiujiang and Its Numerical Model Forecast

The cold wave weather process in Jiujiang in the early spring of February 2020 was analyzed.The results show that the establishment of blocking high near Lake Baikal and the rapid southward of cold air after accumulation resulted in the cold wave weather accompanied by strong cooling,hale and rain(snow)weather in Jiujiang.Before the cold wave broke out,the ground warmed up significantly,which was also one of thermal conditions for this cold wave weather.Water vapor conditions were abundant at middle and low levels;at 850 hPa,temperature dropped by 12-14℃during February 14-15,and-4℃isotherm appeared in the southern part of central Jiangxi,which is a favorable condition for rain(snow)in most areas of Jiujiang.

A Comparative Analysis of Sino-Thai College English Course Teaching——A Case of Comparison between Jiujiang University and Chiang Mai University

English is one of the most common languages in the world,and it has become one of the most important subjects in various countries.The native languages of China and Thailand are not English,and both countries are located in Asia and have many similarities in geographical location and cultural background.The Ministries of Education of the two countries have successively put forward relevant policies to promote the development of English education in the country.The implementation of these policies has promoted the development of college English course teaching in the country.These factors determine that the two countries have similarities in college English course teaching for Non-English majors.However,there are differences in teaching mode and teaching staff in the two countries because of their different national conditions,which make many differences,exist in college English course teaching for non-English majors in the two countries.During the author’s career as an exchange student in Chiang Mai University,she experienced the difference of college English course teaching for non-English majors in Thai universities,so the author did some researches on the basis of the understanding of English course teaching in Thai universities.Therefore,this thesis takes Sino-Thai college English course teaching for non-English majors as the research object—takes Jiujiang University and Chiang Mai University as example,and analyses their present situation from the aspects of the development and evolution,the teaching mode,and teaching staff of college English course teaching for non-English majors.On this basis,the author makes a comparative analysis of the English course teaching for non-English majors in two selected universities,then find their respective advantages and disadvantages,and put forward some suggestions on the development of Sino-Thai college English course teaching.

Preliminary Study on the Dynamic Variations of the Surface Thermal Flux before and after the M_S5.7 Earthquake of 2005 in Jiujiang City,Jiangxi Province

The temporal and spatial variations of surface latent heat flux(SLHF)and diagnostic air temperature at 2m before and after the M_S5.7 earthquake occurring on November 26,2005 in the area between Ruichang City and Jiujiang City,Jiangxi Province are summarized in this paper.It is found that before the earthquake significant SLHF anomalies and air temperature anomalies occurred in the epicentral area and its vicinity.The air temperature anomalies appeared from the 2nd to the 13th of November,2005 and were concentrated at the epicentral area and in its southern part.Then two days later,that is,from the 4th to the 15th of November 2005,significant SLHF anomalies occurred in the epicentral area and to its northern area where many lakes are distributed along the active faults.During the anomalous period,the SLHF and air temperature at 2m exceeded the sum of average daily value over 26 years and 1.5 times of its mean square deviation.Both anomalies had maintained for 12 days with a peculiar distribution related to the tectonic active zone.It is considered that both of air temperature anomalies and SLHF anomalies are correlated to the movement of thermal flux from underground prior to earthquake.SLHF anomalies occurred over wide regions covered with abundant water,whereas air temperature anomalies occurred over land.

Shear-wave Splitting of Aftershocks of the M_S 5.7 Jiujiang-Ruichang Earthquake

Shear wave splitting is studied based on the digital waveforms of three seismic stations DJS, SZD and WUJ, which were set up after the Jiujiang-Ruichang MS5.7 earthquake of November 26, 2005 around the epicenter area. The result shows that the time delays of slow shear waves of the DJS station, which is not far from the epicenter and where the distribution of faults is complex near the station, are relatively larger and the polarization directions of fast shear waves are not concentrated; the predominant polarization direction of fast shear waves of WUJ station, with single fault distributed nearby, has a difference of 35° to the strike of the fault and is inconsistent with the direction of regional principal compressive stress. The predominant polarization direction of fast shear waves of SZD station with no faults nearby is in accordance with regional principal compressive stress. There is no obvious regular relationshipship between the delay time and the focal depth.

Discussion on the Precise Relocation and Seismo-Tectonics of the Jiujiang-Ruichang Earthquake

Based on relocating the Jiujiang-Ruichang earthquake sequence which occurred on November 26,2005 in Jiangxi Province with the double-difference(DD)algorithm and master event technique,the paper discusses the focal mechanism of the main shock(M_S5.7)and the probable seismo-tectonics.The precise relocation results indicate that the average horizontal error is 0.31km in a EW direction and 0.40km in a NS direction,and the average depth error is 0.48km.The focal depths vary from 8km to 14km,with the predominant distribution at 10km～12km.The epicenter of the main shock is relocated to be 29.69°N,115.74°E and the focal depth is about 10.8km.Combining the predominant distribution of the earthquake sequence,the focal mechanism of the main shock and the tectonic conditions of NE-and NW-strike faults growth in the seismic region,we infer that the main shock of the earthquake sequence was caused by a NW striking buried fault in the Ruichang basin.The nature of seismic faults needs to be further explored.

Distribution and Transport of Heavy Metals in Rice Plants in the Jiujiang River Basin

Inductively coupled plasma mass spectrometry(ICP-MS)was used to analyze the distribution and migration of heavy metals in rice plants in the Jiujiang River Basin,to evaluate the distribution of heavy metals in rice plants and to analyze their migration.The results showed that the distribution of different heavy metal elements in various tissues of rice plants varied greatly.The heavy metal migration factor of rice plant stems and leaves was significantly higher than that of rice husk and brown rice.The distribution of heavy metal content in rice in the Jiujiang River can provide a certain theoretical basis and reference value for the safety and quality of rice in the Jiujiang River Basin.

三峡水库运行后汉口—九江河段水位变化特征及成因

大型水库的修建引起坝下游的水位调整,进而对河势、航运、防洪及生态等产生显著影响。为探究汉口—九江河段水位变化特征及成因,采用M-K分析法分析1988—2022年汉口、黄石港和九江站的水位变化趋势,并使用基于距平残差的水位变幅分析方法和一维水动力模型,分析河道冲淤、下游水位和阻力变化对不同特征流量下水位变化的影响。研究结果表明:①三峡成库前,除九江站枯水位呈显著性下降趋势,各级流量下的水位均没有显著性变化趋势。②三峡成库后,九江站的水位变化趋势与建库前相同;汉口站、黄石港站在12000 m^(3)/s和20000 m^(3)/s下的水位呈显著性下降趋势,12000 m^(3)/s时降幅分别为0.072、0.045 m/a,20000 m^(3)/s时降幅分别为0.048、0.027 m/a;水位变化的临界转换流量约为30000 m^(3)/s,在该流量附近水位未出现明显变化;当流量大于30000 m^(3)/s时,水位呈非显著性上升趋势,45000 m^(3)/s下的升幅分别为0.037、0.049 m/a。③临界转换流量以下水位下降的主导作用为河道冲刷,临界流量附近的水位未出现明显变化源于阻力增大作用接近抵消了河道冲刷的影响,临界转换流量以上的水位上升源于阻力增大作用更加明显,个别年份的洪水位上升显著源于下游水位顶托作用明显。

The tectonic settings and seismogenic tectonics of the M5.7 Jiujiang earthquake in 2005,Jiangxi Province,China

The M5.7 Jiujiang earthquake in 2005 was a mid-strong one, stronger than expected to occur in the region. This paper discusses the neo-tectonic settings of this earthquake, and it is thought that the earthquake region is located in the transitional belt, a potential area inducing weak to moderately strong earthquakes, between two large different tectonic units. The results of the reconnaissance work and on-the-spot investigation after earthquake indicate that the occurrence of the M5.7 Jiujiang earth- quake is closely related with the NE-trending fault on the western margin of Ruichang Basin. From its controlling to the landforms and Quaternary depositions, geological profiles, ESR dating, etc., the ac- tivity of the Dingjiashan-Langjunshan fault bounding the basin is discussed. It suggests that this fault displays an active one in Middle Pleistocene by the outcrop. Based on the activity of the fault, and the direction and location of the ground fissures, the isoseismal lines and the nodal plane of the focal mechanism solution, it is inferred that the Dingjiashan-Langjunshan fault is the seismogenic tectonics of the M5.7 Jiujiang earthquake, and the intersection point between this fault and the active NW ones is the possible origin of location of this earthquake. Our study shows that this earthquake is not an event exceeding expectation, and that the active and invisible characteristics of the causative fault are typical in the eastern area of China.

长江中游新九河段蔡家渡护岸损毁原因及维修对策

护岸工程在航道整治工程中被广泛用于抵御水流冲刷和维持岸线的稳定。由于护岸工程通常布置在原有岸坡易发生崩岸和垮塌的部位,易受水流冲刷而发生损毁,影响其功能的正常发挥。采用实测资料对长江中游新洲—九江河段蔡家渡护岸损毁情况进行分析。结果表明:蔡家渡护岸水下护排头部损毁严重、上游侧出现崩窝,损毁原因主要是大水作用下水流贴岸及大江侧主槽摆动等。在此基础上,分析了维修的必要性,并提出采用“补坡+镇脚”的维修方式,旨在为长江中下游类似护岸建筑物提供参考。

藤本植物园林景观应用调查分析——以九江市为例

为了解九江市园林景观中藤本植物的应用情况,对九江市濂溪区、浔阳区、柴桑区、八里湖新区四个城区进行抽样实地调查,并详细记录各地点应用的藤本植物名称,应用形式,生长状况,观赏效果等.通过调查发现藤本植物在园林景观应用中存在的问题,并对九江藤本植物的应用及发展提出合理性建议,以期提高九江市的绿化覆盖率、增加城市绿量.

1970—2022年九江市寒露风灾害变化趋势研究

为提升九江市水稻寒露风防灾减灾的科学水平,利用九江市内9个国家气象观测站1970—2022年的气象数据计算寒露风指数,以寒露风指数为统计标准对九江市寒露风的变化趋势进行分析,最后基于均生函数对未来10年九江市寒露风指数进行了预测。结果表明:寒露风指数的高值区主要集中在九江市西部的修水和武宁站、北部的瑞昌站和中部的德安站,其中20世纪80年代为1970—2022年各年代际的最高值;武宁、瑞昌和永修3站的寒露风指数随时间推移呈现出显著的递减趋势,下降速度分别为3.58/10 a、3.13/10 a和2.32/10 a;武宁站寒露风指数的突变年份为1994年,瑞昌和修水站的出现在2010年前后,其他站点的出现在2020年;未来10年九江市的寒露风指数可能会出现1~2个极小值,出现时间集中在2025—2028年,其中北部的瑞昌和湖口站、中部的德安站、西部的修水站寒露风指数的预测数值较高。

2021年九江市都昌县农村居民乙型病毒性肝炎疫苗接种现状及其影响因素

目的:分析2021年九江市都昌县农村居民乙型病毒性肝炎(乙肝)疫苗接种现状及其影响因素。方法:选取2021年九江市都昌县下辖的24个乡镇的600名居民为研究对象,采用调查问卷收集农村居民基本信息,评估疾病与预防知识知晓情况,并根据是否接种乙肝疫苗将其分为接种组与未接种组,采用Logistic回归分析2021年九江市都昌县农村居民未接种乙肝疫苗的影响因素。结果:2021年九江市都昌县600名农村居民未接种乙肝疫苗76名,未接种率为12.67%(76/600);两组性别、配偶情况、职业比较,差异均无统计学意义(P>0.05);未接种组年龄>45岁、学历水平为高中及以下、家庭月收入<3000元、无外出打工史、无乙型肝炎病毒(HBV)感染者接触史、疾病与预防知识知晓情况为不知晓占比均高于接种组,差异有统计学意义(P<0.05);Logistic回归分析结果显示,年龄>45岁、学历水平为高中及以下、家庭月收入<3000元、无HBV感染者接触史、疾病与预防知识知晓情况为不知晓均为2021年九江市都昌县农村居民未接种乙肝疫苗的危险因素(OR>1,P<0.05)。结论:年龄>45岁、学历水平为高中及以下、家庭月收入<3000元、无HBV感染者接触史、疾病与预防知识知晓情况为不知晓均为2021年九江市都昌县农村居民未接种乙肝疫苗的危险因素。

九江市一次锋前降水过程地形作用分析

利用地面自动站常规资料、再分析资料和S波段双偏振雷达资料,对发生在赣北九江地区2022年4月24日到25日的一次锋前降水的生成、发展过程进行分析。结果表明:1)锋面过境前,当整层都处在上下一致的西南风时,庐山东侧鄱阳湖河谷地带会形成东北-西南向的地形通道,易触发局地对流,形成下游比上游先产生降水的现象。2)此次过程锋前暖区中,庐山东侧的地形通道有通过促进湍流增强加快雨滴凝结增长的方式增强降水的作用。3)幕阜山脉对此次冷锋降水在迎风坡有较弱的增强作用,在山顶及背风坡有削弱作用。

长江中下游典型区域土地利用碳排放风险——以江西省九江市为例

[目的]定量测算江西省九江市土地利用碳排放,揭示其时空演变特征,并估算土地利用碳排放风险,为九江市构建绿色低碳土地利用方式提供科学参考。[方法]采用土地利用碳排放系数法测度2000—2020年九江市土地利用碳排放和时空变化规律,并从网格化的视角,利用碳排放风险指数识别各县区碳排放风险,基于对数平均迪式指数(LMDI)模型,分析土地利用碳排放的影响因素。[结果]2000—2020年九江市土地利用净碳排放量呈递增趋势,年均增幅为13.75%,建设用地是主要碳源,占碳排放量的90%以上,林地是主要碳汇。九江市净碳排放量呈现“东北高,西南低”的空间分布特征,森林覆盖率好的武宁县、修水县一直处于碳汇功能,濂溪区、浔阳区、湖口县、瑞昌市的碳排放量占九江市净碳排放量的95%以上。九江市土地利用碳排放风险整体偏低,并呈现“东北高,西南低”的分布特征,长江沿岸县区濂溪区、浔阳区和柴桑区处于高度碳排放风险区。经济发展水平是碳排放增加的主要因素,能源消费强度则是抑制碳排放的关键因素。[结论]2000—2020年九江市土地利用碳排放大幅增加,应控制新增碳源用地,优化土地利用结构,并积极探索低碳绿色能源利用体系,着力推进长江经济带绿色低碳发展的“九江模式”建设。

基于扎根理论的农村三产融合驱动因素分析--以江西省九江市为例

厘清农村三产融合的驱动力,是当前促进农村产业融合发展的关键问题。对江西省九江市龙头企业、农村合作社、新农人、行业协会等新型农业经营主体开展访谈,运用扎根理论方法,构建了驱动因素模型,研究九江市农村三产融合发展过程中主要影响因素。结果表明,九江市农村三产融合驱动因素主要包括政府因素、主体发展特征因素、成长性因素、市场因素和认知因素。几个因素相互影响、相互联系,形成了稳固的四面体。基于以上研究结论,要通过发挥政府主导作用,加大资源整合力度,提升对三产融合的正向认知,促进九江农村三产融合发展。

南浔铁路规划设计图

南浔铁路作为江西省第一条客运铁路,北起九江,南达南昌,全长128.35 km。虽然线路不长,但在中国铁路修筑史上具有重大意义。在中国地质图书馆珍藏着一套手绘图——《NAN—HSING RAILWAY RICHT-OF-WAY PLAN》,从图的绘制者、成文的时间可判定,这应该是南浔铁路的第一张设计图,具有非常重要的学术研究价值。本文从铁路的修建背景入手,向世人展示了这套世人罕知的设计图。

单位大院型历史文化街区的保护更新策略初探--以九江老地委大院为例

作为特定时期的历史见证,单位大院型历史文化街区具有独特的历史价值、自成体系的内部空间,也承载着单位职工的情感记忆。在社会经济转型的大背景下,这类街区面临功能转变、管理缺位、物质性衰败等突出问题。在延续历史文脉、提升城市品质的要求下,应当关注其遗产属性,挖掘保护大院独特的历史和风貌;应当立足城市需求,开放优化大院存量设施,修补城市功能;应当引导社区治理主体从单位转向社会和市场,保障大院长远可持续发展。

江西九江中更新世红土物质来源研究

华南地区广泛分布中更新世红土。目前,对其物质来源尚有争议。九江红土剖面的沉积时代已得到很好限定,同时由于其沉积连续、地层出露较好,是开展中更新世红土物质来源研究的理想剖面。通过对九江中更新世红土2件碎屑锆石样品的分析,共获得177颗谐和锆石U-Pb年龄,主要峰值集中在新元古代(816 Ma、801 Ma和991 Ma)、古元古代(2019 Ma、2022 Ma和2481 Ma)和新太古代(2502 Ma),并具有不显著的中生代峰值(135 Ma)。将其与潜在远源和近源物源区的锆石U-Pb年龄组成进行对比,结果发现中国北方戈壁、沙漠和黄土高原、塔里木盆地、华北平原并不是九江中更新世红土的主要源区。庐山北麓早更新世发育的洪积扇为九江中更新世红土发育提供了充足物质。九江中更新世红土和九江晚更新世黄土的碎屑锆石U-Pb年龄组成存在明显差别,后者主要来自长江河漫滩的碎屑物质。不同的气候条件主导了九江地区红土和黄土的发育,二者都受控于青藏高原构造隆升产生的环境变化。