谱分析在南沙海区冬季大风中期预报中的应用

本文对１９７９．１１－１９９４．３月，冬季南沙海区出现的偏北大风，采用了谱分析的方法，探讨超长波、长波活动与南沙海区冬季大风的关系，通过对上述１６年冬季北半球５００ｈＰａ候平均高度资料进行分析，计算波数Ｋ＝１－１０的角动量输送，经向和纬向扰动动物物物理量谱参数及有关波参数，分析它们所提供的演变信息及南沙海区冬季大风过程的某些中期预报方法和指标。     

Numerical simulation of characteristics of semidiurnal tidal waves in sea region around Taiwan

INTRODUCTIONNumerica comutation and simu1ation of tidal waves in the closed ocean of China havebo greatly imProved in recent years. As far as the method Of numerica comPU8tion are con-cemed, we can divide them into two classes: beundary va1ue methed and initial value methed.The fOrmer needs the tidal level value of coast beund8ry and the side beundary of water shOuldbe given, and its calculative result dePends on the reliability of boundary value. The rnan-madeermr, caed by getting the…     

A study of remote sensing of sea-surface wind field with 8-12 GHz broad band radar scatterometer

The paper is devoted to the results of the study on sea-surface wind field remote sensing using 8-12 GHz broad band radar scatterometer. Principles and techniques of remote sensing with broad band scatterometer are described. Variations of microwave scattering coefficients on sea surface with different frequencies and incident angles at different polarization and wind velocity are given and the correlationship between scattering coefficients and wind speeds. The result shows that the research is valuable.lt provides data and basis for remote sensing of the sea-surface wind fields with broad band radar scatterometer.     

太湖流域浙西区不同农业土地类型的面源污染产出

This paper takes Zhexi hydraulic region in Taihu Basin as a study area. On the basis of hydraulic analysis function of Arcgis8.3, the drainages were delineated by selecting the monitoring points and discharge stations as outlets. The landuse map were finished by denoting the TM/ETM image. The precipitation map was finished by spatial interpolation according to the rainfall monitoring records. Overlaying the drainage boundary, landuse map and precipitation map, the rainfall, different landuse type area, and runoff pollution concentration and runoff were calculated. Based on these data in different sub-watersheds, by Origin7.0 regression tool, an equation is established to predict runoff using the relationships between runoff, precipitation depth and land use patterns in each of the sub-watersheds. Selecting the sub-watershed which is mainly composed of forest landuse type, the mean runoff concentration (MRC) from sub-watershed has been estimated. The mean runoff concentration of farmland has been estimated by the same methods after the contribution of forestlanduse type was removed. The results are“ for the forest landuse type, the mean runoff concentrationsof COD, BOD, Total N and Total P are 2.95 mg/l, 1.080 mg/l, 0.715 mg/l, and 0.039 mg/l,respectively; for the farmland, the mean runoff concentrations of COD, BOD, Total N and Total P are 5.721 rag/l, 3.097 rag/l, 2.092 rag/l, and 0.166 rag/l, respectively. By using these results, the agriculture non-point pollution loads have been assessed. The loads of COD, BOD, Total N and Total P in Zhexi region are 14,631.69 t/a, 6401.93 t/a, 4281.753 t/a and 287.67 t/a, respectively.     

广西东兰-凤山地区石炭纪-二叠纪碳酸盐岩洞穴发育特点及其控制因素

碳酸盐岩次生溶蚀孔洞是优质的储集空间,为油气的运聚提供条件。为研究溶洞发育的控制因素,选取广西东兰-凤山地区石炭纪-二叠纪碳酸盐岩溶蚀特征进行分析。镜下显示,研究区岩石类型为亮晶生屑灰岩、颗粒灰泥灰岩、含颗粒灰泥灰岩、晶粒灰岩和灰泥颗粒灰岩等,孔隙类型主要为粒间溶蚀孔、粒内溶蚀孔、晶间孔和微裂缝。研究发现,影响洞穴发育的主要因素有构造、岩组类型、流体性质、气候及岩溶古地貌。构造控制洞穴发育规模,在构造破碎带及其附近容易发育大规模洞穴;目的层大套灰岩是溶蚀的物质基础,力学强度较大的亮晶生屑灰岩易于形成大型洞穴,当岩石含较多灰泥或发生重结晶时,溶蚀难度增加;酸性流体、温暖潮湿气候和岩溶斜坡地貌,为洞穴发育的有利条件。其中,构造对洞穴发育的控制作用最大。     

确定天然气水合物饱和度的测井解释新方法

为了丰富和发展天然气水合物的定性识别方法和定量解释技术,研究试验了由测井资料计算孔隙水的氯离子质量浓度并确定水合物饱和度的方法。根据南海某海域水合物储层的测井特征和孔隙水氯离子质量浓度化验结果,证实了氯离子质量浓度与水合物饱和度有密切关系。利用孔隙度测井和电阻率测井资料,计算了孔隙水的氯离子质量浓度,由此确定了天然气水合物的饱和度。为了提高测井解释的可靠性,用回归方法建立了储层的孔隙度解释公式,确定了相应的阿尔奇参数m和a,用滤波和插值的方法得到了目的层的氯离子质量浓度的背景值。初步应用表明,由测井解释氯离子质量浓度计算的水合物饱和度与化验结果的平均值和分布范围都有较好的匹配。     

利用ArcView绘制综合等震线图的简便方法

ArcView是一种地理信息系统软件,具有可视化、浏览、查询和分析空间数据的能力。利用ArcView的菜单命令,本文提出一种绘制综合等震线图的简便方法,并以首都圈地区综合等震线图的绘制为例,说明新方法的易用性。     

旅游地理学视域中的中国名胜组景分析

中国名胜组景遍布全国34个省(市、区),从3～108景不等.在收集到的2395组名胜组景中,以偶数组景为主,其中尤为突出是的四字句组景,占到总数的99%以上:八景在各种组景中居于重要地位,占64.80%.组景景观可分为自然景观与人文景观两种类型,有动静合一、时空合一、虚实合一和主客合一之特点,其构词方式主要为"名词/偏正短语+偏正短语"型与"名词/偏正短语+动宾短语"型;组景景名具有用词典雅、形象生动、化静为动和点睛显要的艺术特色.从整体上看,名胜组景具有与时而变、多元复合、指导游览等特性.可给旅游地理学的研究以有益启示.     

太湖宜溧河流域洗衣粉排磷贡献率的研究

太湖宜溧河流域内总磷发生量为３５４０．９８ｔ／ａ,进入太湖的总磷量为１５７．４３ｔ／ａ、流域内总磷的入湖率为４．４５％。流域内洗衣粉排磷发生量为３３６．２０ｔ／ａ,洗衣粉排磷入湖量为２７．７１ｔ／ａ,洗衣粉排磷量占入湖总磷量的比例为１７．６０％。因此,洗衣粉“禁磷”措施在全太湖流域的实施,可削减约１７．６％的总入湖磷量,这对减轻太湖富营养化状况,缓解藻花的暴发,改善太湖水环境起到一定的作用。     

Faunal associations,paleoecology and paleoenvironment of marine Jurassic rocks in the Mae Sot,Phop Phra,and Umphang areas,western Thailand

We here report a paleoecological analysis and depositional history of the marine Jurassic (Toarcian-early Bajocian) strata cropping out in the western part of Thailand, based on bivalve assemblages with additional data from ammonites, brachiopods, and microfossils. Generally, the benthic bivalve facies in most outcrops is rich in infaunal, semi-infaunal and epifaunal suspension-feeders. Of these, infaunal forms dominate. The diversity of this benthic assemblage was influenced by energy level, substrate, sedimentation rate, and salinity. Low to intermediate energy levels and rather soft fine-grained siliciclastic substrate are proposed as factors governing faunal distribution and explaining the greater abundance and diversity of infaunal than epifaunal suspension-feeders. There were paleoenvironmental changes both in space and time, i.e., from south to north (Umphang to Mae Sot) and from Early Bajocian to Toarcian. In the Toarcian, most outcrops in Umphang are dominated by benthic bivalve facies (infaunal, semi-infaunal, and epifaunal associations). This implies warm, shallow water (inner neritic, 50–100 m) and oxygenated conditions except for the Mae Sot area where a deeper setting (outer neritic to possibly upper continental slope, 50–200 m) with restricted basinal anoxic conditions is favored as indicated by the presence of Bositra. After higher energy conditions in the Toarcian, lower energy conditions with low sediment supplies prevail in the Alenian, and the Mae Sot area was still a restricted basin. As a result of higher sea levels, the oxygen content in the basin is increased, resulting in the presence of the ammonites. By the end of the Alenian-early Bajocian, an ammonite-bivalve association (mixed facies A) and the presence of corals and microfauna (mixed facies B) are dominant but pass upwards to near-shore higher energy conditions in most areas except for restricted basin in Mae Sot. By the middle Bajocian the environment in all areas had changed from marine to nonmarine.