bluuebunny/crossref_metadata_2025_split huggingface dataset:
Calculation and Analysis of Sluice Bottom Seepage with Two Methods
Authors: Jiang Linlin , Zhao Chuan , Zhang Jiongjiong 
Published: February 2021

Abstract
Based on Tianjin Xihe control sluice, this paper uses the improved resistance coefficient method and ABAQUS finite element software to calculate the seepage at the bottom of sluice. By comparing the calculation results, the advantages and disadvantages of two methods to calculate the seepage at the bottom of sluice are analyzed, which provides a new idea for the calculation of sluice bottom seepage.
Effect of Different Irrigation Patterns and Covering Methods on Soil Temperature of Onions Under Membrane Drip Irrigation
Authors: Deng Haoliang , Wang Peng , Zhang Yongling , Xiao Rang , Pan Xiaofan , Li Xuan , Wu Keqian , Chen Tao 
Published: February 2021

Abstract
In order to investigate the influence of the soil temperature of onions in the West Hebei Oasis, this paper tested the soil temperature of onions in the Oasis by using the early golden dragon onion as a test material and randomly grouped it into different irrigation modes and cover methods. There were five treatments in the experiment, and the soil temperature of onion was measured in each reproductive period, and the results showed that: The most significant changes in soil temperature were found in the 5 cm soil layer, where the soil temperature was more affected by external influences, and in the 10 and 20 cm soil layers, where the soil temperature was less affected by external influences. The difference in soil temperature was not significant between full irrigation and regulated deficit irrigation. The soil temperature in the black mulch layer was higher than that in the transparent mulch layer and fine sand mulch layer at the seedling and leaf development stages, while the soil temperature in the black mulch layer was higher than that in the transparent mulch layer and fine sand layer at the bulb expansion and maturity stages.The soil temperature of the onion can be best controlled by irrigation while covering the onion with black mulch throughout the growing season, which is of great significance for onion cultivation in the Hexi Irrigation Zone.
DEM analyses of cemented hydrate’s effect on the compression behavior of fine-grained sediments
Authors: Li Tao , Li Liqing 
Published: February 2021

Abstract
The participation of gas hydrate constitutionally affects the mechanical properties of gas hydrate-bearing sediments. The hydrates contribute to the mechanical properties of hydrate-bearing sediments by pore-filling, bearing and bonding effects. A discrete element model of hydrate-bearing silt was established randomly filled by the hydrate particles into silt-sized granular skeleton reservoir. The cluster & bonding hydrate is generated in the pores of the numerical silt reservoir to study hydrate’s mechanical effects. One-dimensional loading was applied to the numerical sample to investigate its volume change, bond degradation and stress transmission. The main conclusions are as follows. The structural yield stress corresponds with the abrupt bond breakage. Particles and contacts will be redistributed after the widespread bond breakage. The breakage of hydrate-hydrate bonded contacts is more quickly than that of silt-hydrate contacts ascribe to a crushing process of hydrate clusters (especially for SMH=45%).
Numerical Simulation Study on Cross Construction of Seawall Engineering and Bridge Foundation
Authors: An Xiaoyu , Wang Fei , Luo Yongjun , Zhang Yuting 
Published: February 2021

Abstract
In view of the overlapping project between the double track bridge of Ningbo-Taizhou-Wenzhou expressway and seawall, the large-scale three-dimensional finite element calculation is carried out by using the finite element software ABAQUS, the displacement limit of bridge pier top is studied, the internal force deformation of bridge pile foundation and its variation law in the process of seawall filling and later consolidation settlement are analyzed, and the influence of sea seawall filling on the stress and deformation of bridge pile foundation is studied. The calculation results show that: the main pier in the enclosure side of the two main piers in the design scheme is most affected by the construction of seawall. At the end of seawall construction, the longitudinal displacement along the bridge is 25.56cm, the transverse displacement is -10.68cm, and the settlement is 3.49cm. From the beginning of seawall construction to 15 years after the completion of seawall, the maximum longitudinal displacement along the bridge is -80.87cm, the maximum transverse displacement is -38.94cm, and the maximum settlement is 382.2cm, in which the settlement during the construction period is 346.0cm, accounting for 90.5%. The calculation results of design scheme show that the displacement of bridge pier top is too large, and the tensile stress of bridge pile is also large, therefore, it is necessary to optimize the design scheme to reduce the displacement of the bridge.
Effect of Different Irrigation Patterns and Covering Methods on Physiological characteristics of Onions Under Membrane Drip Irrigation
Authors: Deng Haoliang , Wang Peng , Xiao Rang , Zhang Yongling , Li Fuqiang , Wang Yucai , Wang Jiaqi , Bu Yifan 
Published: February 2021

Abstract
In order to investigate the influence of the physiological characteristics of onions in the Hexi Corridor, this paper tested the physiological characteristics of onions in the Oasis by using the early golden dragon onion as a test material and randomly grouped it into different irrigation modes and cover methods. There were five treatments in the experiment, and the physiological characteristics of onion was measured in each reproductive period, and the results showed that: The net photosynthetic rate, stomatal conductance, and intercellular CO2 concentration all decreased with increasing amplitude of the transfer loss. Although the net photosynthetic rate, stomatal conductance, and intercellular CO2 concentration of black mulch T1 were higher than those of transparent mulch T4, there was no significant difference between the two treatments, and the net photosynthetic rate, stomatal conductance, and intercellular CO2 concentration of T1 and T4 were significantly higher than those of sand mulch T5. The physiological characteristics of the onion can be best controlled by irrigation while covering the onion with black mulch throughout the growing season, which is of great significance for onion cultivation in the Hexi Corridor.
Research and application on numerical simulation of ship maneuvering motion under bank effect
Authors: Tang Meifang , Tong Sichen , Yang Yun 
Published: February 2021

Abstract
A ship maneuvering mathematical model was established considering the influence of river bank effect based on the depth integrated 2-D flow mathematical model. Tanking the section of the Suoluo beach reach of Lancang River in Yunnan Province as an example, the numerical simulation of ship maneuvering motion under bank effect was carried out. Results show that the typical ship can not ascend rapids when considering the bank effect, so it is necessary to implement channel regulation. The study reveals that the model can simulate the ship maneuvering motion and navigation status under bank effect, which can provide some useful references for the ship’s navigation and maneuvering in mountainous rivers.
Status and Evaluation of the Benefits of Developing Efficient Water-saving Irrigation Infrastructure in Gansu Province
Authors: Deng Haoliang , Pan Xiaofan , Zhang Hengjia , Xiao Rang , Zhang Yongling , Li Fuqiang , Wang Yucai , Chen Tao 
Published: February 2021

Abstract
Since the 20th century, national investment in agricultural irrigation has been increasing, indicating that the state is paying more and more attention to the “Three Rural Issues”. Along with the national emphasis on the "Three Rural Issues" and the background of increasing economic investment in agricultural irrigation, irrigation technology has been developing rapidly in Gansu Province, which is reflected in the year-on-year expansion of efficient water-saving irrigation area. The goal of water-efficient irrigation technology is to improve the water utilisation coefficient, thus optimising the planting structure of crops and increasing crop yields. Therefore, a variety of high-efficiency water-saving irrigation technologies such as pipe irrigation, sprinkler irrigation and micro-irrigation have been vigorously promoted and applied. The article analyses the current status and benefits of high-efficiency water-saving irrigation infrastructure in Gansu Province, and aims to provide data support and theoretical guidance for the development and improvement of high-efficiency water-saving irrigation in the province.
Analysis of application of cement paste grouting curtain in coastal environment
Authors: Peng Tao 
Published: February 2021

Abstract
Zhejiang Datang Wushashan power plant is composed of farmland and aquaculture ponds in the Xizhou seawall, which are backfilled with artificial riprap. In order to block the seepage path in the rock fill layer, the vertical curtain cement paste grouting anti-seepage reinforcement measures are adopted to block the connection between the underground water and the surrounding surface water in the plant area, so as to achieve the purpose of gas closure. This paper mainly analyzes and evaluates the technical indexes, such as grout diffusion range and impermeability, of the cement paste grouting curtain, via field tests and two dimensional numerical simulation based on the platform of PFC2D or Geostudio.
Study on Vegetation Water Requirements of Robinia pseudoacacia and its mixed plantation in Loess Gully Region
Authors: Fu Chong , Song Xiaoyu , Li Lanjun , Li Huaiyou 
Published: February 2021

Abstract
By calculating the vegetation water requirements(ETC
) of the typical plantations of Robinia pseudoacacia and Robinia pseudoacacia-Platycladus orientalis mixed plantation in the Loess Gully Region and analysing the coupling relationship between rainfall(P) and water requirements of each plantation, thereby scientifically guides local tree planting and afforestation, and better vegetation restoration.The Penman-Monteith formula is used to calculate the reference crop evapotranspiration in the study region, and then the double crop coefficient method is used to calculate the daily ETC
of Robinia pseudoacacia and its mixed plantation in different hydrological years. The result shows that from dry year to normal year, the ETC-RP-CO
is less than ETC-RP
by 48.8 mm and 52.2 mm respectively, and the growth season accounts for the largest proportion. The ETC-RP-PO
and ETC-RP
are not satisfied in most months of the growth season. Among them, the initial period and the development period of the growth season are the largest, with the largest water requirements deficits(D) reaching 58.65mm, 51.32mm (dry year) and 106.21mm, 93.18mm (normal years).The ETC
of two plantation increases from dry year to normal year.And the D also increases when vegetation water requirements satisfaction(S) increases, but the increase rate is expressed ETC
> S > D.
A Method of Wetland Planning and Design Scheme Decision Making
Authors: Xiangli HUO , Cong MA 
Published: February 2021

Abstract
In the bidding process of wetland planning and design scheme, in order to obtain the optimal solution through comprehensive trade-off from multiple bidding schemes, this paper proposes a comprehensive evaluation and decision-making method of wetland planning and design scheme based on the wetland planning and construction objectives and the commonly used evaluation index system of wetland planning and design scheme. The fuzzy correlation coefficient from the bidding scheme to the optimal and inferior wetland planning and design scheme is used to determine the relative advantage fuzzy correlation degree of each bidding scheme, and the priority degree of each bidding scheme is ranked according to the relative fuzzy correlation degree, so as to realize the evaluation and decision-making of wetland planning and design scheme. The application shows that the method can effectively solve the uncertainty problem in the comprehensive evaluation and decision-making process of wetland planning and design scheme, and has strong operability. It can provide a reference for similar problems in the process of engineering practice.
Effect of Different Irrigation Patterns and Covering Methods on Onion Water Consumption Characteristics
Authors: Deng Haoliang , Wang Peng , Zhang Hengjia , Xiao Rang , Zhang Yongling , Li Fuqiang , Wu Keqian , Liang Chao 
Published: February 2021

Abstract
In order to investigate the influence of the water consumption characteristics of onions in the Hexi Corridor, this paper tested the water consumption of onions in the Oasis by using the early golden dragon onion as a test material and randomly grouped it into different irrigation modes and cover methods. There were five treatments in the experiment, and the water consumption of onion was measured in each reproductive period, and the results showed that: (1) the soil water storage decreased with the increase of water loss, i.e. the soil water storage size was T1>T2>T3. The difference in soil water storage between black mulch and transparent mulch was smaller, but significantly larger than that of fine sand mulch. (2) The water consumption and water intensity of onion showed a decreasing trend with the increase of the adjustment loss, and the water consumption of fine sand cover > transparent mulch cover > black mulch cover. (2) The water consumption and water intensity of onions decreased with the increase of the regulation deficit, and the water consumption of fine sand mulch was more than that of transparent mulch and black mulch.
Numerical simulation of hydraulic characteristics of surface jet on horizontal base plate with shallow depth
Authors: Yan Zheng , Shuxiang Zhao , Hongchen Xu , Weiping Pan , Dong Zhang 
Published: February 2021

Abstract
The VOF (volume of fluid) method was applied to track free water surface, and the Realizable turbulent model was used to close the two-phase flow time-averaged equation to numerically simulate the hydraulic characteristics of surface jet on horizontal base plate with shallow depth. The result showed that a big vortex exists in the flow field, and the greater the inlet flow velocity, the longer the length of vortex. The distribution laws of horizontal velocity and longitudinal velocity of a cross section are different in the backflow region and open channel flow region. The gradient decaying of the maximum velocity on cross-section was mainly affected by the inlet velocity.
Establishment and application of oil spill model in inland waterway
Authors: Jiang Pinfeng , Tong Sichen , Wang Yiting 
Published: February 2021

Abstract
With the construction of reservoirs in China, inland waterway conditions have been greatly improved. The number of ships and tankers navigated in the inland waterways significantly increased which may lead to an increased risk of oil spill accidents. Oil pollution is one of the major threats to economy and ecosystem. To date research on oil spill is mainly focus on marine environment, however it is very limited on inland river. The purpose of this study is to combine our previous liner experimental study of characteristic of spread and transport of oil spill to develop a coupled two-dimensional oil spill model. An oil trajectory model has been conducted and applied for water surface spread simulation in the Luoqi reach of Yangtze River. The results can provide a reference for the prediction of spread and transport of oil spill in inland waterway.
Research and Application on Mathematical Model of Ship Manoeuvring Motion under Shallow water effect
Authors: Ran Tao , Tong Sichen , Yang Yun , Zhang Huan 
Published: February 2021

Abstract
When ships sail on the inland river in mountainous areas, the limited water depth can frequently lead to shallow water effect. To some extent, safety and maneuverability of shipping will be impacted. Consequently, it’s necessary to consider the shallow water effect when studying the ship ascending rapids in mountainous rivers. By considering the impact of shallow water effect, a three freedoms maneuvering mathematical model based on shallow water effect was established in this paper on the basis of two-dimensional water flow mathematical model. Application of the model was implemented on the regulation of the waterway in Suoluo rapids section of the Lancang River to obtain ship navigating parameters (helm angle, drift angle, heading angle, ship’s speed and speed against the water) for comparative analysis. Results show that the ship can reduce the impact of shallow water effect by adjusting the rudder angle and reducing the ship speed when navigating in shallow and narrow channel. The obtainment of the voyage line diagram by the simulation of ship’s maneuverability test validates that the ship can ascending rapids through self-propulsion after the river regulation.
The study of hydraulic characteristics of pneumatic lifting pump with air startup and shutdown
Authors: Zuo Juanli , Wu Shuang , Huang Ze , Wei Bingqian , Zhang Ning 
Published: February 2021

Abstract
Pneumatic lifting pump, as one of the ideal new methods for mining and upgrading, has obvious advantages such as simple structure, safety and reliability. The research of it has important scientific value and engineering significance. Based on Fluent simulation software, using Euler model and SST k-ω turbulence model, with the help of UDF self-programming, the influence of variable air volumes-linear opening, linearly closing on the hydraulic characteristics of the air-water lifting pump is discussed. The results are shown as follows. 1) In the slow linear opening mode of the gas flow, the liquid lifting flow increases, the change trend of it is slower than that of fast linear closing mode. 2) In the slow linear closing mode of the gas flow, the liquid lifting flow reduces, the change trend of it is slower than that of fast linear closing mode. These research results will lay the theoretical foundation for the application of pneumatic lifting technology in river dredging, sewage treatment, oil extraction and other fields.
Research on the quality risk assessment model for water conservancy projects based on the semi-supervised classification of text
Authors: Zou Zhenyu , Feng Jingchun , Wei He , Li Sheng , Zhang Ke 
Published: February 2021

Abstract
This paper systematically analyzes the quality supervision data system of water conservancy projects. Then, according to the characteristics of water conservancy project quality supervision text, the Word2vec algorithm and TFIDF algorithm are combined to construct a feature extraction system of water conservancy project quality supervision text suitable for short length and few samples. Finally, a semi-supervisory model system consisting of logical regression, simple Bayes, and SVM is introduced to solve the problem of incomplete quality supervision risk data for water conservancy projects. To sum up, on the basis of the three parts, i.e. data system, feature extraction, and semi-supervisory text classification, we build a water conservancy project quality risk assessment framework and provide a data processing tool for machine learning of hydraulic engineering quality risks.
Flood control impact assessment of Tai’an Viaduct (across Panwen River) on Qingdao Lanzhou Expressway
Authors: Wei Zhaozhen , Wang Guanghui , Liu Lili 
Published: February 2021

Abstract
This paper introduces the bridge design and the basic situation of the river channel. Through the calculation of the design flood, backwater, scouring and silting at the bridge site, the paper analyzes and demonstrates the rationality of the construction project from the aspects of the relationship and influence with the relevant planning, the adaptability with the existing flood control standards and management requirements, the impact on the flood safety and appropriate stability, the impact on the existing flood control projects and the flood control and emergency rescue.
Bibliometric Analysis of Water Conservancy Talent Development Research in China
Authors: Ge Qiuli , Zhang Long 
Published: February 2021

Abstract
In order to study the overall status of the research on water conservancy talent development in China, 6135 articles on the water conservancy talent development published in the past 30 years were downloaded from CNKI. Taking these articles as the sample, the time distribution, hot topic, topic cluster and research frontier of the water conservancy talent development research were quantitatively analysed with CiteSpace software. The results indicate that the scale of water conservancy talent development research has increased significantly in the past 30 years, but it has not become a popular school in the field of water conservancy research. Moreover, the research on the development of water conservancy talent involves a wide range of topics, including water conservancy reform, talent management in enterprises, talent education, rural water conservancy talent development, but the research appears extensive on the whole, so the future research can develop in a more refined way.
The Hydrodynamic Division of Lingdingyang Estuary and its Application in the Impact Analysis of Large Water-Related Projects
Authors: Yang Liling , Yang Fang , Yu Shunchao , He Yong , Li Yue 
Published: February 2021

Abstract
The dynamic environment of lingdingyang estuary is very complex due to the confluence of runoff and tide as well as the different characteristics of each entrance. Meanwhile, human activities are intensive. Taking the large bridge project of the Pearl River Estuary--Shenzhen-Zhongshan Bridge Project as an example, this paper divides the waters of Lingdingyang estuary where the project is located into tidal channel area, shoal area and two west flood discharge areas based on the differences of hydrodynamic and environmental characteristics. Combined with the one and two-dimensional tidal current model of estuary and delta, the paper discusses the dynamic response of different dynamic characteristic areas to the engineering construction, and carries out the construction scheme optimization and hydrodynamic influence demonstration. The project impact analysis based on dynamic zoning proposed in this paper not only rationally evaluates the hydrodynamic environmental impact of large water-related projects of Lingdingyang, but also is of great significance to the balance of protection and development of Lingdingyang Estuary.
Rainfall-induced landslide displacement prediction model based on attention mechanism neural network
Authors: Tang Tianjun , Tang Feifei , Wang Xifei 
Published: February 2021

Abstract
Being influenced by fluctuating precipitation, long-term rainfall-induced landslide displacement prediction could be unstable. To solve this problem, a rainfall-induced landslide displacement prediction model based on Attention Mechanism Neural Network(AMNN) is proposed in this paper. Firstly, accumulative landslide displacement is decomposed into the trend term and the periodic term. Secondly, multivariate linear regression is adopted to fit the trend term and AMNN is used to predict the periodic term. Finally, the accumulative predicted displacement is given by summing the trend and the periodic displacement components. In this paper, one rainfall-induced landslide in Chongqing province, China was taken as an example to evaluate the designed model. Compared with some existing methods, the model proposed in this paper can captured the correlation between each feature sequence and the predicted term with higher prediction accuracy of 0.97 Goodness of Fit. The results of this paper are believed to be contributive to further rainfall-induced landslide forecast and early warning research.