Selected papers of the Yellow River studies (YRCC)
Source: http://www.yellowriver.gov.cn/zhuanti/hhxxjt/
The water quality status of the estuary of Yellow River and its changing trend in the future
Li Liyang Fengchen Guozhen Wangxia Lihua
（Yellow River Basin Water environmental monitoring center, Zhengzhou 450004)（Corresponding author: liliyang88888@hotmail.com )
Abstract： along with the theory of maintaining the healthy life of the Yellow River brought up and the rising of construction of wetland, the water quality status in Yellow River estuary and its trend of development in the future should be paid highly attention to, because in a sense the water quality status in the estuary is directly related to the continuation of the Yellow River's healthy life in the future, as well as the ups and downs of the wetland construction in the estuary. Combining the results of analysis and assessment of the water quality at LiJin Station in the Yellow River's estuary in “Yellow River basin water resources bulletin”, this paper has generalized the water quality status in the Yellow River estuary at present. Further more combining the field data of mainly water quality parameters at LiJin Station from 1996 to 2005, the trend of the fluctuation of water quality at the estuary has been carried out on both qualitative and quantitative analysis by using the Seasonal Kendall trend test, which will be useful for the reference to management.
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Primary Analysis about the Harness Status, Problems and Countermeasures of the Yellow River Estuary
Sun Yuankuo
Yellow River Shandong Bureau
[Abstract] Based on the analysis of the status and problems of the harness of the Yellow River Estuary such as the capital shortage of the physical model, not suitable management system, not smooth investment channel, not perfect node projects，grim flood prevent position and eroding coastline etc, this paper try to puts forward several countermeasures such as fulfilling the construction of physical model of the Yellow River mouth in good quality and quantity, put the system of harness and management in good order, strengthen integrated father to stabilize the river route to the sea and quicken the construction speed of digital river mouth and so on.
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Research on Diversion of Flow Path at Yellow River Estuary to Beicha
Tang Meiying
Abstract: It has been 30 years since diversion of Yellow River estuary to Qingshuigou in May 1976, and 10 years since diversion of Qingbacha before flood in 1996. To extend passing river years of Qingshuigou flow path, decrease affects on lower reach and be more beneficial to development of regional economics, analysis and research covers continuing using of Qingba or diversion to Beicha and the conclusion is: diversion to Beicha can shorten distance of the river flowing into the sea, maintain the lower water level in the estuary with the same flow rate in a longer time, and improve safety of flood control at the estuary; it can reduce potential threat of natural bank-breaching and adverse water-sediment conditions to the flow path; it will perform retrogressive erosion on the lower reach; diversion to Beicha will deposit 70 km2 additionally and increase safety factor of Eastern Gudong Border Dike with rising of deposit of bottomland.
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A Simplified Model for Narrowing the River Increase Sediment Transport in the Lower Yellow River
Li Yongqiang
Design and planning in the Reconnaissance, Design and Research Institute of Yellow River Henan Bureau, YRCC
Abstract: Narrowing the main channel by the river training works is a scenario which is designed to deal with the increasing of the river bed and disadvantageous route of the Lower Yellow River. 1-D SOBEK is applied to predict what the river morphology is after narrowing the river. The establishment, calibration and validation, simulations, computational results and interpretation are introduced firstly and then discussions. Finally some conclusions and recommendations are proposed based on the SOBEK model.
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Li Shu-Xia ZHANG Jun-hua CHEN Shu-kui MA Huai-bao
(WR Ministry key Lab of Yellow River Sediment, Yellow River Institute of Hydraulic Research, Zhengzhou, 450003)
ABSTRACT: Xiaolangdi Multipurpose Dam Project occupies a critical position in controlling both runoff and sediment of the Yellow River. There are many previous studies on the operation mode of Xiaolangdi Reservoir available in literature, especially for the purpose of sedimentation reduction in the reservoir. Since Xiaolangdi Reservoir was put in use, three times of experiment of flow and sediment regulation were carried out. After that, three times of practice for flow and sediment regulation was implemented with Xiaolangdi Reservoir, which not only made previous studies put into practice, but also recognized law of flow and sediment movement on the Yellow River further.
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Statistical Analysis of Sedimentation Tendency in
Xiaolangdi Hydrometric Station of the Yellow River
Wu Hao 1 Jiao Ruifeng 2 Wang Qingzhai 3
(1. Yellow River Engineer Consulting Co., Ltd., Zhengzhou 450003, China; 2. Yellow River Water Resource Protection Institute, Zhengzhou 450004, China; 3. The Yellow River Conservancy Committee Hydroglogy Bureau, Zhengzhou 450004, China)
Abstract: Based on the water lever and flow data of Xiaolangdi Hydrometric Station of Yellow River from 1960 to 2002, the macroscopic riverbed sedimentation tendency in Xiaolangdi Hydrometric Station of Yellow River was studied with statistical analysis. This study result indicated that the riverbed of Xiaolangdi Hydrometric Station remained basically balanced from 1960 to 1992, and evident souring trend from 1992 to 2002 due to water storage of Xiaolangdi Reservoir and its first water and sedimentation regulation in the Yellow River.
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Zhang Cuiping Ma Tao
(Yellow River Institute of Hydraulics Research, YRCC, Zhengzhou, 450003)
Abstract Since 1974, Sanmenxia reservoir is operated to store the relative clear water in non-flood season and dispose the muddy during floods. The channel adjusts itself toward the direction of equilibrium in flushing period in reservoir. This paper computes the channel-forming discharge based on the concept of geomorphic work, analyzes the relationship between the channel width and channel-forming discharge, presents the change of longitudinal profile, and discusses the index of operation mode of Sanmenxia reservoir and project that should be researched for optimizing it.
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Institute of Hydraulic Research, Yellow River Conservancy Commission,
Zhengzhou 450000, China
The main effective factors of heightening and lowering of Tongguan elevation have been analyzed in this paper. It is pointed out that the main reason on heightening of Tongguan elevation in recent years is caused by the condition of reservoir water and sediment, and the harnessing measures of improving Tongguan elevation is put forward.
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Wang Yanping Zhang Junhua Li Shuxia
(Key laboratory of sediment in yellow river ,zhengzhou 450003 china )
Abstract Based on the study of velocity distribution at mixing interface of turbidity current, an improved formula for calculating the water flow velocity distribution in the region higher the maximum velocity and the turbidity flow in the region beneath the maximum velocity is proposed. On this basis, the formula for calculating the interface resistance of turbidity current is deduced. the validity of the formula is verified by prototype observation an experimental data.
Li Min Zhang Li
(Upper and Middle Yellow River Bureau, YRCC; Xi’an, Shaanxi; 710021)
Abstract: An important approach to “Sustaining the Healthy Life of the Yellow River” is to reduce sediment, especially reduce coarse sediment. The warping dams built in the middle reaches of the Yellow River have retained a great quantity of sediment over the years. However, they were all designed on the ideology, “Intercepting and Retaining All Sediment”, without allowance for the size-grade distribution of the sediment retained, so trapping a mass of fine sediment. Therefore, when calculating the sediment-retaining benefit of warping dam, only 1/4 of total sediment retention was taken into account, greatly reducing the sediment retaining effect of warping dam on sediment reduction in Yellow River.
Studies have shown that great part of the sediment depositing in the lower reaches of Yellow River is coarse sediment with the grain size of more than 0.05mm. Those fine sediments with the grain size of less than 0.05mm could be discharged to the sea along with water flow. The heavy and coarse sediment areas in the middle reaches of Yellow River is main sediment contribution region. Hydrological observation data shows that the sediment with the grain size of less than 0.05mm accounts for about 50% of total sediment even in coarse sediment concentrated region. Therefore, it is essential to study the measures for effectively dealing with (intercept and detain) coarse sediment coming from coarse sediment concentrated region. This paper explores the technique, “Detaining the coarse and Discharging the fine”, for the operation mode of warping dam on the basis of preexisting study results and in combination with the examples of warping dam design, and presents the recommendations to the dam design to increase sediment retention benefit, so that warping dams can play a greater role in “Sustaining the Healthy Life of the Yellow River”
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