Numerical Simulation of Residual Circulation due to Bottom Rouglmess Variability Under Tidal Flows in A Semi-Enclosed Bay

Nowadays there are some chronic serious environmental problems, such as eutrophication, blue tide and so on, in a complicated coastal zone or a semi-enclosed bay, because the water exchanges between an inner bay and an outer sea is weak compared with the supply of contaminant. Under this situation, a method to improve the water quality by 3-dimensional small unsymmetrical structures has been proposed by Komatsu et al. In this paper, several numerical simulations of the tidal current and concentration for various arrangements of bottom roughness in a semi-enclosed model bay are carfled out with a depth-averaged 2-D numerical model. The model is solved by the hybrid finite analytic method with nonstaggered grid. And the SIMPLES algorithm with Rhie and Chow＇ s momentum interpolation technique is used for the simulation. The effect of Komatsu＇ s method for water purification is examined by numerical simulation. The result of numerical experiment indicates that it is possible to generate a new tidal residual current and to activate a tidal exchange by bottom roughness arrangement only.     

许氏平鲉繁殖群体的生物学及其苗种培育的初步研究

报道了山东近岸许氏平Ｓｅｂａｓｔｅｓｓｃｈｌｅｇｅｌｉ繁殖群体的种群结构，系由体长２３５～４６７ｍｍ、体重３００～３７７０ｇ的３～１４龄个体组成，其生长特性多数为Ｌ∞＝４８０．３４ｍｍ、Ｗ∞＝４１１１．７０ｇ、ｋ＝０．２２１１、ｔ０＝０．５６７、α＝１．０９０５×１０－５、ｂ＝３．１９８．雄鱼３岁、雌鱼４岁达初次性成熟．产仔期在４～５月、盛期为５月上中旬．繁殖力为１．５２万～３１．４５万尾．在水温１１．６～２０．５℃的条件下、约４０ｄ进入幼鱼期。在此基础上报告了亲鱼选择与产仔、苗种培育方法、饵料系列以及水质管理等技术措施，取得育苗的成功。     

怀念中国浮游生物学的创建者──郑重教授(1911-1993)

MOURNINGPROFESSORZHENGZHONGWITHDEEPGRIEF郑重教授，字千里，著名的海洋生物学家、教育家，我国浮游生物学的创建者。1911年10月19日出生于苏州。1934年毕业于清华大学生物系，留校任助教。1936年考取清华水产学留美生，因抗日战争爆发，航线中断，1938年改赴英国留学。先在赫尔大学动物系主任、世界著名浮游生物学家人巴哈代（Hardy）教授指导下，从事北海浮游一生物生态研究，欧洲战争暴发后，他转学于剑桥大学、北威尔士大学。l942年又转入阿伯丁大学，1944年获哲学博士学位并留校任教。1946年任牛津大学研究助理。19…     

一种新型经济海藻--冈村枝管藻

介绍了1种新型经济海藻冈村枝管藻。阐明了引进新型经济海藻，对进一步发展我国海藻栽培业的经济意义和生态意义，综述了该物种的生物学特性、栽培和加工情况、应用价值，以及作者在这方面初步的研究工作，并展望了在我国发展枝管藻栽培业的前景。     

Studies on environment protection of vanadium exploitation in open air

Vanadium, improving mechanism and jointing capacity of steel products, is a kind of excellent additive during steel-making and its industry gets support from national industry policy. On account of shallow buried depth and low technique request of exploitation, there is much exploitation by local people lacking system management and technique guidance in area rich in vanadium since years ago, which damages regional environment dramatically. Accordingly, taking stone coal-vanadium as an example, the paper focuses on environment impact on water environment and eco-environment caused by exploitation in open air. Impact of exploitation on surface water mainly includes mining drainage and eluviated water of stock yard. According to civilian exploitation in the area, the rock suffers man-made disturbance, therefore, water quality indicators of mining drainage like heavy metal, permanganate, CI, SO4^2-, F are able to be analogies of ground water quantity in the region since the primary component of drainage is surrounding rock ground water. Water monitoring result of local well shows as follows： pH 6.68, SO4^2- 5.76 mg/L, F- 0.005 mg/L, Fe 0.025 mg/L, Mo 8.08 μg/L, Ni 5.91 μg/L, Co 0.61 μg/L, and all of them reach corresponding standard of water quality. Ground water turns into acid mine water by oxygenation after it discharges and with the help of sulfur the acid water contains nocuous elements which permeate in groundwater and surface water arousing pollution. The value of pH in the range of standard indicates that the acidification of mine water is relatively weak in the diggings. Eco-environment damage is another aspect that cannot be ignored, it acts as： （1） peeling work and establishment construction destroy landform; （2） stack of waste soil and rock occupies amounts of land; （3） various exploitation activities like vegetation peeling, landform change will enlarge the scope or enhance the intensity of soil erosion, which destroys eco-environment by leading water and soil loss;     

水环境容量的影响因素及分析研究

本文采用流量级频率分析和统计分析方法,对黄河下游流量及泥沙含量对水环境容量的影响进行了研究分析.分析结果:河流在平滩流量时不仅输沙能力最大[8],而且输运污染物能力也最大,黄河下游水环境容量萎缩是平滩流量降低的必然结果.     

宁城中生代道虎沟生物群中两类具原始羽翼龙的发现及其地层学和生物学意义

本文实事求是地介绍了道虎沟生物群的组成及相关地层的岩性，并根据长尾型嘴口龙类(Rhamphorhynchoidea)翼龙与短尾型翼手龙类（Pterodactyloidea）翼龙同期共生的特点，确信道虎沟生物群的地质时代为晚株罗世。此外，本文还研究了道虎沟生物群中翼龙身上发育的皮肤衍生物，初步认为它们是原始羽毛（protofeathers)，至少是与羽毛同源的（feather-homologous)，这对于了解羽毛（广义）的演化历史和早期的形态结构将具有十分重要的意义。     

张家界水环境演变与旅游发展关系

通过实地监测并全面分析张家界国家森林公园水环境演变趋势，发现金鞭溪水质下降最为明显，而且随着游客的逐年增多，呈现出加速恶化的趋势。金鞭溪水质恶化主要表现为蓝藻，绿藻迅速繁殖，感官质量下降，主要原因是上游接待区锣鼓塔排出的污水中总磷超标，通过建立基于环境脆弱因子的动态阈值模型，计算得出：在不超出张家界景区最为脆弱的环境因子－金鞭溪水质标准：总磷≤0．02前提下，金鞭溪上游接待区住宿设施生态阈值，春季临界床位数1186，夏季为3057，冬季为545，秋季为333。     

福州市水环境的问题与对策

本文从工业废水及其排放，生活污水及其排放，畜禽养殖废水及其排放和农药的使用，以及内河水环境等4个方面，分析了福州市水环境的现状及其存在的问题；提出了加强水环境保护、提高水环境质量的有关对策。