Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute

Wuhan, China

Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute

Wuhan, China
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Chen S.,Wuhan University | Chen S.,University of Alberta | Shao D.,Wuhan University | Tan X.,University of Alberta | And 2 more authors.
Agricultural Water Management | Year: 2017

In regional water management, various uncertainties such as randomness, non-stationarities, dynamics and complexities, lead to difficulties for water managers. To deal with the above problems, a new methodology is proposed by introducing two methods nonstationary analysis, where the generalized additive model is selected to analyze and fit the distribution of water inflow; and model optimization, where an interval multistage water classified-allocation model (IMWCA) is formulated to optimally allocate the available water. By incorporating multistage stochastic programming, interval parameter programming and classification thought, the IMWCA model can tackle both stochastic and imprecise uncertainties, realize inter-seasonal dynamic allocation, and address the complexity of various water users. The methodology is applied to the Zhanghe Irrigation District to optimize water allocation for municipality, industry, hydropower and agriculture among winter, spring, summer and autumn. The Zhanghe Reservoir seasonal inflow is found to be nonstationary for all the seasons and can be well fitted by the corresponding distributions, showing the sense of nonstationary analysis. Additionally, the comparison with the other model demonstrates the need for classification. From the results, municipality and industry are more competitive than hydropower. The Dongbao, Dangyang and Zhanghe districts have a higher priority than the Jingzhou and Shayang districts for irrigation water. Water requirements are more likely to be satisfied in autumn. These solutions of optimal targets and optimal water allocation are valuable for optimizing inter- and intra-seasonal water resource allocation under uncertainty. © 2017 Elsevier B.V.


Yan S.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute | Yan S.,Hohai University | Zhai L.,University of Miami | Deng Q.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute | And 3 more authors.
Journal of Soils and Sediments | Year: 2017

Purpose: Restoration of saline soil in coastal areas requires detailed understanding of spatial and temporal soil salt distribution and how the distribution is affected by different environmental factors (e.g., precipitation and evaporation), particularly under the influence of salt water intrusion. Because of the high accuracy of chloride measurement, and chloride as a common ion in soil salt, we used soil chloride as a proxy of soil salt in a coastal area of southeastern China. Materials and methods: The study sites, without confounding influences from human activities and vegetation cover, provide a unique opportunity to estimate the influence of the ocean and climatic factors on soil chloride. Our study represents for the first time the use of daily measured precipitation and evaporation data to quantify these two climatic factors on soil chloride content. Our study includes three sites S1, S2, and S3 which have different distances to the ocean that can indicate the sea intrusion effect. Soil chloride was measured at six soil depths and three times a month from January 2013 to December 2014. We used a general linear model to describe the soil chloride content as a function of distance from the coast, precipitation, evaporation, and soil layer, and the interactions of these factors. Results and discussion: We detected significant main factors including distance to ocean, soil layer, precipitation, and evaporation. The closer site to the ocean and deeper soil layer have a higher chloride content. Precipitation has a strong negative effect, particularly in spring and summer, on the soil chloride content, because of its dilution effect. Evaporation has limited effect on the soil chloride content, because its uptaking effect may be offset by precipitation. Conclusions: The sea intrusion influence can result in degraded soil quality, and this influence may be complicated by the combined effect of precipitation and evaporation. We found that soil chloride in a coastal ecosystem may be highly affected by the salt water intrusion according to the site and layer effects in the results. Chloride is highly mobile and soluble which makes soil chloride highly sensitive to the change of sea intrusion, precipitation, and evaporation. © 2017 Springer-Verlag GmbH Germany


You X.,Wuhan University | You X.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute | Tang J.,Changjiang Institute of Survey Planning Design and Research | Zhang X.,Wuhan University | And 4 more authors.
Journal of Geographical Sciences | Year: 2017

Alluvial channel has always adjusted itself to the equilibrium state of sediment transport after it was artificially or naturally disturbed. How to maintain the equilibrium state of sediment transport and keep the river regime stable has always been the concerns of fluvial geomorphologists. The channel in the middle and lower reaches of the Yangtze River is characterized by the staggered distribution of the bifurcated river and the single-thread river. The change of river regime is more violently in the bifurcated river than in the single-thread river. Whether the adjustment of the river regime in the bifurcated river can pass through the single-thread river and propagate to the downstream reaches affects the stabilities of the overall river regime. Studies show that the barrier river reach can block the upstream channel adjustment from propagating to the downstream reaches; therefore, it plays a key role in stabilizing the river regime. This study investigates 34 single-thread river reaches in the middle and lower reaches of the Yangtze River. On the basis of the systematic summarization of the fluvial process of the middle and lower reaches of the Yangtze River, the control factors of barrier river reach are summarized and extracted: the planar morphology of single-thread and meandering; with no flow deflecting node distributed in the upper or middle part of the river reach; the hydraulic geometric coefficient is less than 4; the longitudinal gradient is greater than 12‰, the clay content of the concave bank is greater than 9.5%, and the median diameter of the bed sediment is greater than 0.158 mm. From the Navier-Stokes equation, the calculation formula of the bending radius of flow dynamic axis is deduced, and then the roles of these control factors on restricting the migration of the flow dynamic axis and the formation of the barrier river reach are analyzed. The barrier river reach is considered as such when the ratio of the migration force of the flow dynamic axis to the constraint force of the channel boundary is less than 1 under different flow levels. The mechanism of the barrier river reach is such that even when the upstream river regime adjusts, the channel boundary of this reach can always constrain the migration amplitude of the flow dynamic axis and centralize the planar position of the main stream line under different upstream river regime conditions, providing a relatively stable incoming flow conditions for the downstream reaches, thereby blocking the upstream river regime adjustment from propagating to the downstream reaches. © 2017, Institute of Geographic Science and Natural Resources Research (IGSNRR), Science China Press and Springer-Verlag GmbH Germany.


Zhao Y.,Wuhan University | Zhao Y.,Key Laboratory of Precise Engineering and Industry Surveying | Guo J.,Wuhan University | Guo J.,Key Laboratory of Precise Engineering and Industry Surveying | Di G.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute
Journal of Geomatics | Year: 2017

This paper focuses on the applications of BDS/GPS observations in the Baolin Tunnel Control Network of North Hubei Water Resources Allocation Project. According to the data of four periods in 2016, three models-BDS, GPS and BDS+GPS are used to calculate the baseline vector of each period respectively. Then we compare the accuracy results with GAMIT solution, which we take as reference value. Results show that the precision result with BDS observation is enough for Baolin Tunnel Control Network. However, observations should be screened to remove the larger ephemeris observations under poor condition. Compared to BDS or GPS solutions (within about 5 mm between North direction and East direction, and 10 mm for Up direction), the accuracy of BDS+GPS observations is much higher than each of them. For the incoming error adjustment work, the accuracy results of different adjustment methods are in line with specifications. The stability of points presents approximately same results with different observation data at the same time.


Guo J.,Wuhan University | Guo J.,Key Laboratory of Precise Engineering and Industry Surveying | Ang X.,Wuhan University | Chen J.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute
Journal of Geomatics | Year: 2017

Focusing on the Baolin Tunnel Project of Water Resources Allocation Project in the north of Hubei Province, project design and analysis of inner horizontal control network for underground water tunnel are introduced. Three kinds of control networks are designed: single-traverse method, cross-traverse method and continuous free-station method, gyro azimuth for the first two methods is also measured, which is used as a new observation for the combined adjustment, then we get the optimal network layout for guiding the construction of project.


You X.,Wuhan University | You X.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute | Tang J.,Changjiang Institute of Survey Planning Design and Research
Journal of Earth System Science | Year: 2017

Alluvial river self-adjustment describes the mechanism whereby a river that was originally in an equilibrium state of sediment transport encounters some disturbance that destroys the balance and results in responses such as riverbed deformation. A systematic study of historical and recent aerial photographs and topographic maps in the Middle and Lower Reaches of the Yangtze River (MLYR) shows that river self-adjustment has the distinguishing feature of transferring from upstream to downstream, which may affect flood safety, waterway morphology, bank stability, and aquatic environmental safety over relatively long reaches downstream. As a result, it is necessary to take measures to control or block this transfer. Using the relationship of the occurrence time of channel adjustments between the upstream and downstream, 34 single-thread river reaches in the MLYR were classified into four types: corresponding, basically corresponding, basically not corresponding, not corresponding. The latter two types, because of their ability to prevent upstream channel adjustment from transferring downstream, are called barrier river reaches in this study. Statistics indicate that barrier river reaches are generally single thread and slightly curved, with a narrow and deep cross-sectional morphology, and without flow deflecting nodes in the upper and middle parts of reaches. Moreover, in the MLYR, barrier river reaches have a hydrogeometric coefficient of <4, a gradient >1.2‱, a silty clay content of the concave bank >9.5%, and a median diameter of the bed sediment >0.158 mm. The barrier river reach mechanism lies in that can effectively centralise the planimetric position of the main stream from different upstream directions, meaning that no matter how the upper channel adjusts, the main stream shows little change, providing relatively stable inflow conditions for the lower reaches. Regarding river regulation, it is necessary to optimise the benefits of barrier river reaches; long river reaches without barrier properties should be systematically planned and regulated; drastic bank collapse and sandbar shrinking should be urgently controlled to prevent the loss of barrier effects. © Indian Academy of Sciences.


Wang T.,Huazhong University of Science and Technology | Zhou J.,Huazhong University of Science and Technology | Jiang Y.,Flood Control and Drought Relief Office of Hubei Province | Weng Z.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute | And 2 more authors.
Journal of Natural Disasters | Year: 2016

Refuge migration in the flood attack makes up an important part of the emergency refuge system. A reasonable refuge migration can effectively reduce the social, economic losses and casualties induced by flood disaster. In view of seeking the optimal evacuation path in the flood disaster, a new network-flow-based migration strategy model which considers road classification, capacity of shelters, evacuation unit, and the traffic jam in the evacuation process was proposed in this paper, and the Jingjiang flood diversion area was taken as the research object to validate its effectiveness. Also, the result from the network flow-based model was compared with the existing evacuation scheme. The comparison showed that, the new evacuation strategy reduced time-consumption and route length, and relieved the congestion in the evacuation process. The proposed new network flow model has good applicability. It can be also applied to other flood impact areas. © 2016, Science Press. All rights reserved.


Shu C.W.,Wuhan University | Han S.S.,Wuhan University | Kong W.N.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute | Dong B.L.,Wuhan University
IOP Conference Series: Earth and Environmental Science | Year: 2016

Extreme urban flood events occur frequently in China, often leading to heavy casualties. Thus, it is of great importance to study the mechanism of the instability of the human body in floodwaters. The results of such research can provide scientific reference for city flood control standards. In this paper, a formula for the incipient velocity of the human body, during toppling instability in floodwaters, was derived based on mechanical characteristics, instability mechanism, and critical conditions during instability. A series of flume experiments were conducted to investigate the incipient velocity of two 3D printed human body models of different sizes; the resultant experimental data was used to determine parameters in the derived formula. Additionally, grip strength was taken as a standard of a person's ability to withstand floodwaters. Finally, crowd factors were introduced, and based on this study, a criterion for the toppling instability of different subjects in floodwaters was proposed. Compared to the results of previous studies, the proposed formula can better predict the instability of the human body in floodwaters. © Published under licence by IOP Publishing Ltd.


Cai J.,China Three Gorges University | Cai J.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute | Liu J.,China Three Gorges University
Yantu Lixue/Rock and Soil Mechanics | Year: 2013

A large three-dimensional model of double hole four dimensional Danba hydropower station diversion tunnel excavation is established, and rock mechanics are calculated by using the Mohr-Coulomb model finite element analysis method and unloading rock mass theory and method, and the effect of stress on tunnel is considered to excavate in different depths of tunnel face, from the hole to a certain depth. The displacement changes of tunnel faces at different key points at each excavation are counted. In comparison, the depth of the best tunnel face propulsion should be selected. Under the propulsion depth, the amount of reserved displacements at different segments and locations of holes is counted to provide data support of necessity of advanced support so as to ensure the construction process successfully. It provides references for other similar engineering design.


Liu Y.Y.,Changjiang Water Resources Commission Changjiang Institute of Survey | Liu B.J.,Hubei Provincial Water Resources and Hydropower Planning Survey and Design Institute
Applied Mechanics and Materials | Year: 2014

Hydrologic responses to climate change have become a great challenge and attracted widespread attention of the researchers. The mountainous Qingyi River watershed in the southwest, China, had experienced significant climate change in the past three decades. It is necessary to investigate the hydrologic responses to these changes. Therefore, the effect of climate change on evapotranspiration (ET), surface runoff, baseflow and streamflow were assessed using Variable Infiltration Capacity (VIC) hydrologic model. The Mann-Kendall test analysis was first used to identify the long-term change in precipitation and temperature over the period of 1980-2010. It revealed that there is a significant change in annual temperature particularly in February, March, July and September, whereas an insignificant change in annual precipitation was founded. Hydrologic simulations show that hydrologic responses to climate change were varied from region to region. Surface runoff was more sensitive than ET and baseflow. Monthly variation of the hydrologic processes, especially the change in surface runoff, was mainly attributed to seasonal variation in precipitation. The results of this research can be a useful source of information for the decision making in water resources management and protection. © (2014) Trans Tech Publications, Switzerland.

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