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CONSIDERATION OF HYDRODYNAMIC CHARACTERISTICS,SEDIMENTS & ENVIRONMENTAL PROBLEMS OF muddy COAST IN THE CONSTRUCTION OF LIANYUNGANG HARBOUR

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Chinese Journal of Oceanology and Limnology 1994年第2期12卷 97-105页

作者：虞志英金■ 张庆曙 1. Institute of Estuarine and Coastal Research East China Normal University 200062 Shanghai 2. Headquarters of Lianyungang Port Construction 222042 Lianyungang

After nearly 20 years of construction,we have successfully solved a series of hydrologic sedimentaryand environment problems encountered during the construction of the big deep water harbour inLianyungang which can now accommodate ships of 50000 *** the economic development,the channel of 50000 tonnage will be built soon, and of 100000 tonnage is under planning. Theconstruction of the international container shipping hub at the harbour is being accelerated in anticipationof the opening of the second Eurasian land *** future development of the harbour will givegreat impetus to the local economy of Lianyungang City and make it an international city.

关键词： Lianyungang Harbour muddy coast hydrodynamic sediments environment

Remediation of Coastal Sediments by Addition of Calcium Nitrate and Presence of Benthos in a muddy Tidal Flat

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Journal of Environmental Protection 2014年第8期5卷 703-708页

作者： Hiroyuki Harada Kotarou Akagi Hiroaki Tutioka Atushi Hashimoto Faculty of Life and Environmental Science Prefectural University of Hiroshima Shobara Japan

This study investigated the change in denitrification rate in muddy tidal flats sediment by chemical and biological remediation. Column experiments were conducted to determine the dependence of denitrification rate on the redox potential. Filtered seawater was fed continuously to the pipe filled with sediment from the muddy tidal flats. An increase in the redox potential from -198 mV to 21 mV with bioturbation led to increases in the denitrification rate from 24.2 mg/m2/day to 29.8 mg/m2/day. The increase in denitrification was explained by the acceleration of mass transfer in the sediment. Redox-potential increased from -400 mV to -200 mV by the addition of 10 g calcium nitrate, acid volatile sulfide was below the detection limit to 20 cm depth, and denitrification rate was increased from 21.3 mg/m2/day to 36.4 mg/m2/day. It is considered that the increased nitrogen concentration led to an increase in microbial activity.

关键词： Redox Potential muddy Tidal Sediment Denitrification Bioturbation Calcium Nitrate

Seismic event, sequence and tectonic significance in Canglangpu Stage in Paleo-Tanlu Fault Zone

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Science China Earth Sciences 2002年第9期45卷 781-791页

作者：乔秀夫高林志彭阳李海兵 Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China School of Earth and Space Sciences Peking University Beijing 100871 China

The Canglangpu Stage of Lower Cambrian Series is widely distributed along both sides of the Tanlu (Tancheng-Lujiang) Fault Zone in the Jiao-Liao-Xu-Huai regions. In the Liaodong Peninsula, the Canglangpu Stage consists of three formations, i.e. Gejiatun, Dalinzi and Jianchang formations in ascending order (lying on the eastern side of the Tanlu Fault Zone). The Dalinzi Formation, developing in a littoral Sabkha environment, is full of catastrophic event records of violent seism, such as liquefied muddy-sandy veins, hydroplastic folds, hydroplastic micro-faults (three forming an organic whole), liquefied crinkled deformations, liquefied breccia and sandy dikes. Based on such records, the seismic liquified sequence of argillaceous rocks in Sabkha is built up. In northern Jiangsu and Anhui provinces, however, there hardly observe seismic records in the Canglangpu Stage, which consists of Jinshanzhai and lower Gouhou and upper Gouhou formations (lying on the western side of the Tanlu Fault Zone). Even if the Gouhou Formation, developing in a lagoon-dry environment, is in the same climate zone as the Dalinzi Formation, and 4 depositional sequences have been identified in the Canglangpu Stage in Northern Jiangsu and Anhui provinces, however, in the same stage in the Liaodong Peninsula, there exist only 3 ones. Therefore, it is not supported by the above mentioned evidence (such as catastrophic events, sequences stratigraphy and lithologic correlation of formations) that the Canglangpu Stage in the Liaodong Peninsula came from northern Jiangsu and Anhui provinces through a long-distance, about hundreds kilometers, left-hand displacement of the Tanlu Fault in the Mesozoic era.

关键词： Canglangpu Stage, Dalinzi Formation, Tanlu Fault Zone, catastrophic event of seism, liquefied muddy vein, hydroplastic fold, seismic-liquefied sequence in Sabkha argillaceous rocks.

PROBLEMS OF RESERVOIR SEDIMENTATION IN CHINA

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Chinese Geographical Science 1998年第2期8卷 22-30页

作者：姜乃森傅玲燕

As there are many heavily sedimentladen rivers in China, with high sediment concentration and a large quantity of sediment load, the sedimentation problems of the reservoirs built on those rivers are so serious that the amount of sediment deposited in the reservoirs is great and the rate of sedimentation is accelerated. According to the statistics, up to the end of 1981, a total amount of 11.5×109m3 of sediment were accumulated in those reservoirs, i.e. 14.2% of the total designed capacity were lost. The average annual loss in storage capacity reached 2.3 percent, being the highest in the world. Silting of impounding lakes not only has an effect on the benefits of the reservoirs and seriously threatens the life of reservoirs, but also results in many environmental problems which were not fully estimated in the planning of the reservoirs. In this paper, the situation of reservoir deposition in China are described from the following aspects: 1) the characteristics of hydrology and sediment of the rivers; 2) the seriousness of reservoir sedimentation in China; 3) problems caused by reservoir deposition; 4) the methods of minimizing sediment deposition, etc.

关键词： reservoir sedimentation rivers with heavy sediment load impounding clear water and releasing muddy water measure of minimizing sediment deposition

“Water-Colouring” and Geomorphologic Features of the Marl Hills in Changing Quality of Soil and Water

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Computational Water, Energy, and Environmental Engineering 2017年第1期6卷 129-142页

作者： Leila Montaseri Abolghasem Amirahmadi Mohammadali Zangeneh Asadi Mokhtar Karami Faculty of Geography and Environmental Sciences Hakim Sabzevari University Sabzevar Iran

Water scarcity has always been one of the most important obstacles in the process of agricultural development in arid and low-rainfall climates. In farming, the water quality also plays an important role;as the poor quality of water can be one of the limiting factors in this sector that in addition to the agricultural problems has also caused soil problems. In this paper, we introduce and study an indigenous method of water conservation and soil protection in the east of Iran termed as “water-colouring” and the role of geomorphologic features of marl hills in one of the rivers located in the southern slopes of the Joghtay Mountain (Kalateh-Sadat Watershed). In this study, field observation, sampling and analysis of water and sediment, physicochemical experiments, SPSS software for statistical analysis and satellite images have been used to produce digital models. Finally, the effects of muddy water and clear water have been compared in terms of chemical quality and productivity of agricultural land. The results show that the method of water-colouring is the best indigenous-economical method for moisture retention and regeneration of the agricultural land soil. Given the statistical reasons and studying the other researches in this field, water-colouring causes change texture and soil composition, fertility of agricultural land and reduce the losses due to evaporation and infiltration.

关键词： Water-Colouring Marl Hills Kalateh-Sadat muddy