流式细胞术对微微型浮游植物识别初探

利用流式细胞术对东、黄海水域中微微型浮游植物进行识别测量的初步探讨，实验结果表明，可以直接利用细胞内含有的不同色素，经氩离子激光器488nm波长的蓝光激发产生的自发荧光，通过FACScan流式细胞仪进行识别，进一步的研究可以建立近岸生物群体分布和丰度研究的实验分析方法。     

On the Triassic Stratigraphy of Szechuan

正 Since the illuminating study on the Mesozoic stratigraphy of Szechuan by C. Y. Lee [40] and the valuable contributions by T. Y. Hsu [26-32], much light has been thrown upon the Triassic stratigraphy and palaeontology of that region.     

On the Occurrence of Melonechinus in Kuangsi, China

正 This short paper is meant to record the discovery of the interesting genus, Melonechinus, in eastern Kuangsi, China. It is well known that most species of the genus are found in the St. Louis limestone of the Meramec group in North     

ESTIMATION OF SOIL EROSION IN A RESERVOIR WATERSHED USING ^137CS FALLOUT RADIONUCLIDE

Sedimentation from soil erosion is a critical reservoir watershed management issue. Due to the difficulty of field investigations, empirical formulas are commonly used to estimate the soil erosion rate. However, these estimations are often far from accurate. An effective alternative to estimating soil erosion is to analyze the spatial variation of 137Cs inventory in the soil. 137Cs can be adsorbed by the soil and is widely assumed to change its distribution only when disturbed by rainfall and human activities. Thus, 137Cs distributed in soils can be a useful environmental tracer to estimate soil erosion. In this study, the net soil loss estimate is 108,346 t/yr and the gross erosion and net erosion rates are 10.1 and 9 t/ha yr respectively. The sediment delivery ratio is therefore estimated to be 0.9 based on the two erosion rates. Because of the steep hillsides in the watershed, only 10% of the sediment yield stayed in the deposition sites and 90% was transported to the river as the sediment output. Soil erosion estimates from spatial variations of the 137Cs activity in the Baishi river watershed showed satisfactory accuracy when compared to sediment yield data. Using soil 137Cs concentrations is therefore a feasible method for estimating soil loss or deposition in Taiwan. Data sampling, analysis and result of this approach are given in this paper.     

地下水中有机氯农药的半透膜采样方法野外实验

利用含有甘油三油酸酯的半透膜装置进行室内模拟实验和野外验证实验，旨在开发一种可以模拟生物过程的监测地下水的方法。得出了有机氯农药在水相和半透膜之间分配的平衡时间和富集系数，平衡时间除δ-BHC为234h和p，p’-DDE、o，p-DDT为70h外，其余组分均为594h；α—BHC、六氯苯、β—BHC、γ—BHC、δ-BHC、七氯、艾氏剂、七氯环氧、p，p’-DDE、狄氏剂、异狄氏剂、p，p’-DDD、o，p’-DDT,p，p，-DDT富集系数分别为：0．061、0．071、0．098、0．066、0．033、0．014、0．007、0．062、0．108、0．052、0．029、0．032、0．061 mL／h。七氯、艾氏剂、o，p—DDT、p，p’-DDE以及p，p’-DDT组分在膜中的平衡浓度远小于它们在水中浓度，不适于用此种半透膜取样器进行富集；在凉水河岸边的野外实验结果也验证了半透膜装置监测地下水有机氯农药的可行性，但其个别组分的结果出现异常，需要在该地区进一步开展工作进行研究。     

区域水资源可持续利用评价研究——以陕西省为例

引用宋松柏等人提出的RSWRS系统发展综合指标体系，分单项指标可持续利用隶属度和等级评分两种方法对指标量化，为避免线性加权求和方法得出的指标数值因忽略低指标数值对可持续利用的限制影响，建立了以可持续隶属度幂权重求积方法的水资源复合系统综合指数模型，对陕西省水资源可持续利用评价，并将评价的结果与线性加权求和方法得出的结论相比较。     

中国沿岸主要验潮站海图深度基准面的计算与分析

对中国沿岸有代表性的15个验潮站的多年潮位观测资料，以年序列进行调和分析并据调和常数计算验潮站的海图深度基准面，分析了由年观测序列求得的调和常数和海图深度基准面的稳定性，研究和更新了理论上可能最低潮面计算中的浅水分潮和长周期分潮订正算法。计算结果表明，中国沿岸不同验潮站的海图深度基准面定义和算法存在差异，新的订正算法计算的可能最低潮面和最低天文潮面具有意义一致性，研究成果能够用来精化和重新构建中国沿岸海图深度基准面。     

重力场的局部虚拟向下延拓以及利用EGM96模型的模拟实验检验

阐述了基于虚拟压缩恢复法导出的虚拟向下延拓法，该法从理论上解决了重力场的向下延拓问题。为了检验理论的正确性，选取EGM96模型进行了模拟实验检验，实验结果支持局部虚拟向下延拓法。同时，对观测值加进随机误差的情形也进行了模拟实验检验，结果表明，局部虚拟向下延拓几乎不损失精度。     

Active fault survey on the Tanlu fault zone in Laizhou Bay

Introduction The Tanlu fault zone, the largest active structure in the eastern region of China, is character-ized by right lateral strike-slip movement with dip-slip component in the Quaternary; it shows great significance for the modern seismicity (FANG et al, 1976; Institute of Geophysics, China Earthquake Administration, 1987; GAO et al, 1980; MA, 1987; LI, 1989; CHAO et al, 1995). The Tanlu fault zone is the boundary between the Jiaoliao block and the North China Plain block of …