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1990 Vol. 1, No. 1

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1990, 1(1): 1-1.
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Distribution of Extreme Storm Rainfall Values in China
Wang Jiaqi, Hu Mingsi
1990, 1(1): 2-12.
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Extreme rainfall storm values are most important for determining design floods of large water resource projects. Based on the storm data in China, some relevant problems of the extreme point rainfall storm values are discussed in this paper, including maximum 24 hr point rainfall, maximum point rainfall for different duration and seasonal variation of extreme values of rainfall storm. Numerous figures and tables of maximum point rainfall storm records are presented here in. In addition, spatial pattern of the rxtreme values and their influencing factors are also discussed.
Stochastic Variations of Annual Runoff Data for the Main Rivers in China
Deng Yuren, Ding Jing, Yang Rongfu
1990, 1(1): 13-21.
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Based on the stochastic analyses of annual data for the main rivers in China (more than 100 rivers and 177 streamflow gaging-stations), some relevant statistical properties including trends, almost periodicities, purrandomness and persistences as well as their spatial patterns are discussed herein.
Conservative Difference Schemes for 1-D Unsteady Flow Computation in Natural Rivers
Tan Weiyan, Hu Siyi
1990, 1(1): 22-32.
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From the viewpoint of numerical computation, various forms of 1-D unsteady open channel flow equations and conservativity of their differences schemes are analysed. Based on the discussion, the authors summarize the approaches and principles for constructing conservative difference schemes for the equations,and propose practical techniques such that conservation can be achieved exactly or approximatley.
The Theory and Technique of Fuzzy Optimizing Dynamic Programming for Multiobjective Water Resources System
Chen Shouyu
1990, 1(1): 33-43.
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This paper presents the new concept-multiobjective recursive matrix and establishes the theory, model and technique of fuzzy optimizing dynamic programming for multiobjective water resources system. The objective weight is also proposed by using the fuzzy sets method. Finally, a case study is given.
The Warm/cold Winter in East Asia and the El Niño Event
Bao Ghenglan, Xie Simei, Wei Dingying
1990, 1(1): 44-48.
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In recent decade, the winter temperature in East Asia has been increasing obviously. The analysis in this paper verifies that the temperature change in winter in East Asia has a close teleconnection with sea surface temperature(SST) over the eastern equatorial Pacific and the main ocean current regions of the North Pacific. If SST over the eastern equatorial Pacific is anomalously higher (orlower),i.e. El Niño event (or Anti El Niño event)occurs, North and Northeast China would experience a warmer (or colder) winter, and the sea ice situation of the Bohai Sea would be a light (or severe, ice year) during the period of the following 7-24 months. Based on this idea, a regressive forecasting equation was established. The forecasting results of sea ice situation of the Bohai Sea in 1988/1989 and 1989/1990 winters were pretty good.
The Application of Water (Mass) Balance Model in Glacierized Area to Assessing the Climate Impact on Glacial Water Resources
Lai Zuming, Ye Baisheng, Zhu Shousen
1990, 1(1): 49-54.
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A water (mass) balance model is suggested, which can be used to evaluate the hydrologic impacts of plausible climatic changes in glacierized area.Taking an example of Glacier No.1,Headwaters of Urumqi River on the northern slop of Tianshan Mts., hypothetical twenty climatic change scenarios are discussed,which are combinations of temperature incrcase from 1-4℃ with precipitation change of 0, ±10% and ±20%. The results show that the present runoff yielded in the glacierized area is the maximum during the period of glacial retreat, higher than that among the twenty hypothetical scenarios. Therefore the runoff of the rivers fed by glaciers in the cold high mountains in Northwest China would decrease gradually as the global climate becomes wanner.
Developments of Environmental Hydro-Science in China
Fang Ziyun
1990, 1(1): 55-59.
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The purpose of this paper is to describe the definition and the contents of the environmental hydro-science and to propose its five tacks. Also, the developments of each task in China are reviewed in some detail. Finally, the author suggests some ideas how to develop this subject.
The Scientific Achievements of the International Hydrological Programme
Zhao Kejing
1990, 1(1): 60-65.
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In this paper a general survey is given on the main scientific achievements of the International Hydrological Decade and the International Hydrological Programme in the past 25 years. Attention is also paid to the characteristics of every step of the IHD/IHP development. In conclusion a few remarks upon the scientific progress of IHD and IHP are made.
1990, 1(1): 65-65.
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1990, 1(1): 65-65.
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1990, 1(1): 66-72.
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1990, 1(1): 72-72.
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