Zelin Ding's research while affiliated with North China University of Water Conservancy and Electric Power and other places

... Since the last two decades, many hardfill dams and road embankments have been constructed around world concerning many extensive advantages in comparison with conventional embankments [2][3][4][5][6][7]. While the technology of hardfill dams was established in recent decades, many researchers focused on developing and optimizing new aspects of hardfill dam design [8][9][10][11][12][13][14][15]. ...

... Since the founding of New China in 1949, substantial progress has been made in the construction of gravity dams [18][19][20][21], arch dams [21][22][23][24], and earth-rock dams [25][26][27]. ...

... The Yellow River Delta is located at the junction of the Bohai Sea and Yellow River and has a unique ecosystem and important ecological functions [20,21]. In recent decades, coastal agriculture, fertilization, irrigation, tillage, and other management practices in the Yellow River Delta have added complexity to soil water and salt transport processes and intensified soil salinization and degradation [22]. ...

... Ni et al. [13] elaborated on the application prospects and structural characteristics of light mobile flood control walls, combined with theoretical calculations and finite element analysis techniques and focused on explaining the structural forces and failure modes of light mobile flood control walls. Zhang et al. [14] studied a new type of mobile flood control wall based on urban underground space entrances and exits. e stability and safety of flood control walls were analyzed through the material mechanics method, which provided a positive reference for urban underground space flood control. ...

... The foundation is made of C30 concrete. Considering the size effect of scale model, the materials of the dam are modulated according to the similar-material proportioning based on the similarity principle of the model test [80,81]. Given that Poisson's ratio has an insignificant influence on the vibration response of the structure [82], only the density and elastic modulus of these two parts are considered as unknown input parameters. ...

... Nowadays, in many part of the world, earth fill dams are the most widely adopted dam structure (Nourani et al. 2021), where their advantages are likely to be enormous in terms of drinking water supply, flood protection, irrigation, and energy, among others (Ren et al. 2020). From an operational point of view, the control of dam safety is a critical part of the whole process of dam managing and it can help in a real and better understanding of the overall structure behavior (Zhang et al. 2021a). Seepage flow (Q) plays a vital role in enhancing the dam stability and it became one of the most important factor to be correctly and continuously controlled (Zarif Sanayei and Javdanian 2020). ...

... Numerous studies have investigated changes in the Chinese eco-environment through different perspectives or indicators, such as the following: (1) vegetation change, which is represented by the normalized difference vegetation index (NDVI) derived from remote-sensing data [18][19][20]; (2) changes in ecosystem service values or functions, which can be measured by integrating a series of ecosystem services, such as soil formation, waste treatment, biological control, and food production [21][22][23]; (3) changes in the ecological footprint, which measures anthropogenic pressure changes in the environment, and a declining ecological footprint, contributing to the improvement of eco-environmental quality [24,25]; (4) the eco-environmental vulnerability index, which integrates several subsystems, such as land-resource conditions, water-heat meteorological conditions, geological conditions, and human impacts, to reflect the sustainable development ability of a region [26][27][28][29]; and (5) changes in the eco-environmental quality index (EQI), evaluating the different eco-environmental quality (EQ) of the land-use type and then calculating the EQ changes caused by land-use transition [30][31][32][33]. ...

... At the same time, creative innovative practice online courses have been built, its hybrid teaching has been carried out for five semesters in SDTBU [20][21][22]. A creative and innovation practice curriculum system is built through in-class and after-class learning as well as online and offline learning channels, and the first and second classrooms, as shown in Fig. 8. ...

... With the development of test and computer technologies in the 21st century, studies on the mechanical properties of earthrockfill dam materials by using the P-Z model have entered a new stage. Zhang Hong Yang [13,14] deduced the static and dynamic parameters of P-Z models according to the results of a triaxial test on clay and sandy soils and a vibrostand test. The obtained static and dynamic parameters were applied in the numerical analysis of practical engineering to discuss the safety of earth-rockfill dams under static and dynamic conditions. ...