Abstract:Outstanding contribution, educational mode. The deeply cherish and the memory of Professor Shi Chengxi is presented in this paper.

Abstract:There exist significant differences between the river systems in the area of the Karakorum-test Kunlun Mountains. Regionalization of the water resources in this area has been proved by using fuzzy clustering method, through which 3 types have been settled.

Abstract:Based on the precipitation data from 1953 to 1983, the features of the spatial-temporal distribution of precipitation and regularity of droughts and floods over the Xiuhe River basin in the upper reaches of Zhelin Reservior are analysed. In general, rainfall mainly occurs in the middle and last decade of Jane, Sometimes the rainy season is delayed to the middle decade of July, Statistics show that two month's rainfall from May to June yields about 55% of the year's total. The heavy rainstorms in the end of Meiyu are of great importance for the responsible department to control flood operation. A composite distribution map of 14 heavy rainstorms is given, meanwhile, the features of circulation during drought and flood years are also comparatively investigated in this paper.

Abstract:Understanding deeply the interrelationship between different kinds of gravity current deposits is an extremely important subject in the study of lake sedimentology.Recently the transporting process models for turbidity currents with diverse origin have been established through the analysis and anatomies of resedimentation by disaster events. A tremendous debris flow emptying directly into Lucerne Lake occurred at Wegiss Town in 1795. The research of sedimentation caused by this event reveals the characteristics of transportation and sedimentation for different facies of subaqueous mud flow, providing a good case for the transforming process from mud flow into turbidity currents.

Abstract:A number of oil and gas-bearing closed rift basins were formed at Early Tertiary along the great faults, stretching in a NE or NNE direction in East China.These basins were often evolved into closed or semi-closed saline lakes as a result of arid climate.The chemical content of mudstones in some of there basins indicates that mudstones are composed of clay minerals and a small amount of carbonates. The relationship between the sedimentary environments, especially salinity and some geochemical indexes, is studied and it is believed that Sr/Ba, total Ca/Mg, Ca/Mg, V/Ni and Mn/Fe can reveal the temporal and spatial changes in salinity of the lakes at the stage of low salinity.However, there exists no positive correlation among Sr/Ba, CaCO₃, B and salinity at supersaturated stage.

Abstract:The geomorphic characteristics of Qarhan Salt Lakes are divided by utilizing the basic data and remote sensing and the salt geomorphic dynamic mechanism and salt geomorphic genesis type studied according to the endogenic and exdogenic force function of geodynamic principles. With the genetic relation and movement regularity of geomorphic landscape constructed, the geomorphic evolution order of each other substantiates original and secondary geomorphic order and the geomorphic evolution pattern of contain geomorphic and minerogenetion faction etc., forming geomorphic environment system and substance process, and inductive in the compatibility unification of the field conceptual relation-geomorphic field.

Abstract:Poyang Lake of Jiangxi Province is the largest freshwater lake in China. There are abundant aquatic plants, including flowering plants of 37 families, 70 genera, 98 species. Although Poyang Lake is located in the subtropic zone, the floristic elements are complexly composed of the common species of subtropic-temperate, tropic-temperate and cosmopolitan. As compared respectively with the floras of Lugu Lake, Honghu Lake, Baiyandian Lake and Jingbo Lake, the flora of Poyang Lake is found more similar to that of Honghu Lake than to those of the other lakes, showing that the flora of Poyang Lake has a, character of subtropic.

Abstract:From March 1987 to March 1988, measurements were taken on the quantities of seston and particulate organic detritus in two areas of Baoan Lake, Dahu and Jiaodunhu. The average dry weight of seston was 337.6 and 100.5 tons in Dahu and Jiaodunhu respectively. The ash-free dry weight of seston was 127.7 and 50.3 tons in Dahu and Jiaodunhu respectively. The quantity of particulate organic detritus was 96.9 and 40.2 tons in Dahu and Jiaodunhu respectively, Showing apparent seasonal variations in the quantities of seston and particulate organic detritus. The decomposition of Potamoglton maackianus, Myrio-phllum spicatum and Vallisneria spiralis are important in the formation of seston. Estimated from the amount of carbon in the seston, the potential production of silver carp and bighead carp is 12.3 and 11 kg/mu at Dahu and Jiaodunhu respectively.

Abstract:This paper deals with the reproductive biology of Neosalanx tangkahkeii taihuensis, Neosalanx jordani and Reganisalanx brachyrostralis in Poyang Lake, the results are as follows:1.N. tangkahkeii taihuensis has two reproductive seasons, from the mid-Feb. to the mid-May and from the beginning of Sept. to the mid-Nov., in a year. N. jordani spawns from the mid-Mar. to the mid-May, And R.brachyrostralis spawns very little earlier than N. tangkah keii taihuensis. 2.All the three species have an evident second character, with a row of scales above base of anal in male. The No. of scale of N. tangkahkeii taihuensis is 14-19, N. jordani 10-16, R. brachyrostralis 18-28. 3.The body length of reproductive group:N. Jangkakkeii taihuensis re pro-ducting in spring in female is 61.5±2.5mm(n=456), male 59.9±2.3mm(u= 116), female shows greater than male in body length, (F=39.5, F_{0.01(1, 400)}=6.7). N. tangkahkeii taihuensis reproducing in fall in female 59.6±2.7mm(n=31), male 58.2±2.6mm(n =63), female also shows significantly greater than male, (F=5.61, F_{0.05(1, 80)}=3.96), N. jordani in female 38.9±2.4mm(n=443), male 38.6±2.2mm(n=347), both show no significant difference in body length, (F=2.45, F_{0.05(1, 1000)}=3.85). R. brachyrostralis in female 131.7±9.9mm(n=18), male 127.3±7.3mm(n=9). 4.Sex ratio:N. tangkahkeii taihuensis is about 1:1 before spawning, and during the reproductive season, it varies from hoar to hour.By the analysis of the process as a whole, the closer the time to the end of spawning, the less the No, of male. N. jordani is about 1:1 before spawning too, During the reproductive season the sex ratio varies greatly. 5.Ave. absolute No. of eggs and Ave. relative No.of eggs N. tangkahkeii taihuensis 1696 and 1716/g. body weight, N. jordani 317 and 1749/g. body weight, R. brachyrostralis 5129 and 1643/g. body weight. 6.The eggs of the three species fishes are adherent and sinkable, on which are some fine adherent threads, No. of threads of N. tangkahkeii taihuensis 19-37, N. jordani 12-17, R. brachyrostralis 13-17. 7.In the reproductive season the coefficient of ovary of N. tangkahkeii taihuensis is 13-16%, and that of spermary 0.27-2.63%. 8.There is ten spots of spawning site of salangid fishes in Poyang Lake, the total area is about 118 km².

Abstract:Hanasi Lake, located in Buerjin County, Aertai Region, Xinjiang Province, 48°43'-48°54'N, 86°59'-87°09'E, has an area of 45km², average depth 120.1 m. and maximum depth 188.5 m, belonging to a tectonic-glacial deposit dam lake formed by glacial erosion. Since 1985, it has become famous for its discovering the "big red fish" (Hue ho taimen (Pallas)).Hanasi Lake was surveyed twice, in Aug. 1987 and July 1988. According to the analysis of samples, 21 speceis of zooplankton have been identified, among which, 1 species belongs to Protozoa, 11 to Rotifera, 6 to Cladocera and 3 to Copepoda. The average amount of zooplankton is 60.7 ind./L and average biomass is 0.6499 rag/L. In addition, this paper deals with the characters of horizontal and perpendicular distributions for zooplankton, and estimates the amount which acts as the bait for fishes. All these may help discover the “raddle” of the “big red fish”.