Water Conservancy Construction Research Articles

Evaluation on the willingness of migrants and native farmers to transfer farmland in resettlement areas and their coupled coordination relationships: perspectives for environmental and social sustainability

The construction of water conservancy and hydropower projects often involves substantial land acquisition and resettlement. Land is a crucial means of production, playing a significant role in ensuring food security and protecting the ecological environment and social development. However, the advancement of urbanization and changes in production methods have led to a noticeable shift in the behavior of farmers on lands. Abandoned land and reclaimed wasteland in host resettlement areas lead to low land-use efficiency, environmental degradation, and frequent geological disasters. It is important to evaluate the willingness of migrants and native farmers to transfer farmland in the resettlement area and their coupled coordination relationships to realize effective land use. These were evaluated in this study by constructing an index system from personal and family characteristics, land resource endowment, characteristics of the external policy environment, and psycho–cognitive characteristics. The results showed that their coupling degree was 0.999, while their coupling degree of coordination was 0.68. The relative development degree was 1.01. It showed that a strong correlation existed between the willingness of migrants and native farmers, and they were in a basic coordination phase. They influenced each other and reached a basic balanced state. Farmland can be transferred between migrants and native farmers to improve their livelihood, resettle migrants, improve land-use efficiency, and reduce wasteland reclamation. This suggested the possibility of establishing a land transfer resettlement model based on the willingness of migrants and native farmers to achieve environmental and social sustainability in the resettlement area.

Research on Probability Estimation Method of Investment Cost of Water Conservancy Construction Project

The construction period of water conservancy construction project is long, and the project cost is affected by many uncertain factors. There is a great difference between the final account value after the completion of the project and the budget value before the commencement.Therefore, this paper considers the complexity and variability of the project cost, analyzes and constructs the probability estimation theory of investment cost from the perspective of system analysis, and applies it to the estimation of the investment cost of the construction project of Matan River miaotazi hydropower station, and calculates the probability distribution of the total cost change.The research results can provide a new idea for the estimation of investment cost of water conservancy projects, and also provide valuable reference for the estimation of investment cost of Matan River miaotazi hydropower station.

An Analysis of the Relationship between River Engineering and Water Conservancy Construction and State Capacity in the early and middle periods of the Qing Dynasty (A.D. 1644 - A.D. 1820)

The study in this paper focuses on the relationship between the financial situation related to river engineering and water conservancy and state capacity in the early and middle periods of the Qing Dynasty. There have been some controversies in the study of state capacity in the Qing Dynasty. Taking the governance of the Yongding River in the Kangxi Dynasty and the governance of the Jiangsu and Zhejiang Seawalls in the Yongzheng and Qianlong Dynasties as examples, this paper argues that in the river engineering and water conservancy construction in the early and middle periods of the Qing Dynasty, the expenditures were not only supported by the part of the total amount of regular fiscal income, but by the positive extra revenue other than regular fiscal income. This fact suggests that the state’s capacity in the early and middle periods of the Qing Dynasty was recognizable in handling practical affairs and might not be as weak as it appeared.

The important role of intelligent water conservancy in the construction of high-standard farmland

Farmlandis the basis of food production,and also the key and difficult point of agricultural development in China.At present, China’s farmland is generally characterized by small scale, scattered distribution, weak infrastructure, and low level of informatization. High-standard farmland construction is an important policy formulated at the national level to ensure food security and promote agricultural transformation and upgrading. It is based on farmland water conservancy and combines information technology and communication technology with high-standard farmland construction, realizing the whole process of information perception, transmission, and management from field to market. However, China’s farmland water conservancy has problems such as backward irrigation conditions and technology, imperfect supervision and management mechanism, and lack of information professionals. The contradiction between agricultural modernization and high-quality development and insufficient demand for farmland water conservancy has gradually become prominent. Therefore, it is necessary to strengthen the construction of smart water conservancy, and strengthen the use of Internet of Things, cloud computing, big data, artificial intelligence, and other technologies to achieve information sharing and data sharing of high-standard farmland construction, to realize the efficient, accurate, and scientific management of high-standard farmland, and to ensure China’s food security.

An integrated accounting system of the economic-social-ecological framework for assessing the value of intensive land use: A case study of the Taihu Lake governance project

Assessing the value of land resources is a prerequisite for resource management, as well as for resolving the conflict between supply and demand. In the realm of intensive land use (ILU), a standardized framework for accounting methods from a project perspective has yet to be established. Therefore, taking the Taihu Lake governance project (TLGP) (which includes the Xingou River project, Xinmeng River project and Zoumatang River project) as a case study, this paper firstly constructs an integrated value accounting system based on economic, social and ecological frameworks. Furthermore, with consideration of physical parameters, we incorporated the integrated land section price method, income reduction method, alternative market method, and equivalent factor method are all incorporated to assess the value of ILU at distinct stages within the research area. This approach serves to elucidate the evolving dynamics of ILU valuation. The results showed that: (1) There were significant differences in the values generated by the ILU in different projects. The integrated value of the TLGP brought about by ILU was 177,189,300 yuan, and the ILU of the Xinmeng River project was significantly higher than the Zoumatang River project and the Xingou River project. (2) The ILU at different stages basically displayed the law of diminishing marginal utility. Consistent with changes in the different stages of the TLGP, the value of ILU in Stage I of the Zoumatang River project and the Xingou River project was significantly higher than that in Stage II. Additionally, the accounting system proposed in this study has the advantages of reasonable index setting and simple process operability. This helps to realize the comparison of ILU values across projects and stages. The results of this study can provide a reference for the management and sustainable use of land resources during the construction of water conservancy and other projects.

Alteration Mechanism of Variscan Granite in a Project Area at the Northern Foot of the Tianshan Mountains, China

Long-term erosion of granite—a type of hard rock—by hydrothermal fluids and tectonic movement can lead to a fragmentation of the internal structure of the original rock, transfer/replacement of mineral elements, and alteration of the rock’s basic properties. Such changes can be problematic for the construction of water conservancy, hydropower, and road projects. This study adopted the altered Variscan granite in a water diversion project area at the northern foot of the Tianshan Mountains (China) as the research object, and explored the alteration mechanism using thin section identification, X-ray diffraction, major element analysis, and electron probe and oxygen isotope tests. Results showed that the lithology of the granite in the study area is mainly biotite granodiorite and biotite monzonitic granite. Reductions in both the K+ content in plagioclase and the K+ and Ti4+ contents in chlorite indicate that the alteration types within the study area are mainly clayization of feldspar minerals and chloritization of biotite. Biotite granodiorite and biotite monzonitic granite both have low δ18O values. The δ18O value of biotite granodiorite decreases with increase in the Loss on Ignition. The low-δ18O-value granodiorite due to an alteration by hydrothermal fluids transformed from glacier meltwater, groundwater, atmospheric precipitation, and magmatic water; whereas the monzonitic granite might be formed by the reinvasion of low-δ18O-value granodiorite formed in the early stage, which is remelted, assimilated, and rebalanced. The research findings provide a reference for similar research on altered granite at the northern foot of the Tianshan Mountains, and also lay a foundation for subsequent research on its physical/mechanical properties and engineering characteristics.

Exploring the Importance and Countermeasures of Construction Management of Water Conservancy Projects

This article aims to explore the importance of construction management in water conservancy projects and the strategies to address challenges. The second part emphasizes the significance of construction management in water conservancy projects, including improving project quality and safety, scheduling construction progress effectively, controlling costs and resource utilization, and ensuring environmental protection and sustainable development. The third part lists major challenges faced in water conservancy construction management, such as technical issues, land use and acquisition problems, financial and human resource management, as well as environmental protection and ecological balance. The fourth part presents strategies to address these challenges, including strengthening project management systems and standards, enhancing technological research and innovation, establishing sound regulatory mechanisms and legal frameworks, improving personnel training and management, and strengthening communication and collaboration with communities and stakeholders. In conclusion, the importance of construction management in water conservancy projects lies in ensuring project quality, safety, and progress. To address challenges, appropriate strategies should be implemented to continuously improve and innovate.

Retracted: Construction of Water Conservancy and Energy Engineering Structure Platform Based on Cloud Computing

Retracted: Construction of Water Conservancy and Energy Engineering Structure Platform Based on Cloud Computing

Effects of Extreme Precipitation on Runoff and Sediment Yield in the Middle Reaches of the Yellow River

Understanding the link between extreme precipitation and changes in runoff and sediment yield is of great significance for regional flood disaster response and soil and water conservation decision-making. This study investigated the spatial and temporal distribution of extreme precipitation (characterized by 10 extreme precipitation indices recommended by the Expert Team on Climate Change Detection and Indices) in the Toudaoguai–Longmen section of the middle Yellow River from 1960 to 2021 and quantified the effects of extreme precipitation on runoff and sediment yield based on the method of partial least squares regression (PLSR). The extreme precipitation index showed an obvious upward trend in the last 20 years, with the increases in the central and northern regions (upstream) being stronger than the increase in the southern region (downstream). However, the runoff and sediment yield decreased significantly due to the implementation of large-scale soil and water conservation measures on the Loess Plateau, with average rates of 94.7 million m3/a and 13.3 million t/a during 1960–2021, respectively. The change points of runoff and sediment yield change occurred in 1979. Compared with those in the period from 1960 to 1979, the reductions in runoff and sediment yield in the years 1980–2021 were 52.7% and 70.6%, respectively. Moreover, extreme precipitation contributed 35.3% and 6.2% to the reduction in runoff in the 1980–1999 and 2000–2021 periods, respectively, and contributed 84.3% and 40.0% to the reduction in sediment yield, respectively. It indicated that other factors (such as large-scale soil and water conservation construction) played main roles in the decrease in runoff and sediment yield in the study area in recent 20 years.

The optimization model of soil and water conservation ecological construction for power transmission and transformation projects in ecologically sensitive areas in Sichuan and Chongqing area in the new era is analyzed

In the construction and development of modern society, the overall characteristics of soil and water conservation ecological construction are not only reflected in the coordination of biological measures and engineering measures, but also in the sustainable development of economy and technology, which is the fundamental demand of the comprehensive treatment and optimization model of soil and water conservation for power transformation projects in ecologically sensitive areas of Sichuan and Chongqing in the new era. Therefore, after understanding the development requirements of ecological sensitive areas in Sichuan-Chongqing area, this paper mainly studies the optimization model of ecological construction of soil and water conservation according to the construction management content of power transmission and transformation projects, so as to provide technical support for urban construction and development in the new era.

Variation characteristics of hydrological response to water conservancy construction in the Qinhe River Basin of the Loess Plateau, China

AbstractInvestigating the response characteristics of various hydrological factors to water conservancy projects area in basin and evaluating their impact on the ecological environment are crucial for ecological protection and restoration on the Loess Plateau, China, with a complex environment. In this study, we employed a geomorphology‐based hydrological model to simulate the hydrological elements of the Qinhe River Basin on the Loess Plateau. We explored the response characteristics of the water cycle and hydrological processes to the construction of reservoirs in the basin. Additionally, we also examined multiyear changes in peak flood volume and sediment discharge during flood seasons influenced by reservoirs. The sub‐basins hosting reservoirs initialled an increase in evaporation, followed by a decrease. During the change periods, both runoff and soil water decreased, but remained higher than the mean values for the basin during the same period. The Normalized Difference Vegetation Index of sub‐basins associated with five reservoirs was obviously higher than the mean value for the basin during the same period. The peak flood volume and sediment discharge in the basin were characterized by decreasing trends, with the latter showing weak sustainability. The value of each index for a sub‐basin associated with a reservoir was higher than the average value for the basin. The construction and operation of reservoirs had a positive impact on the ecology of the basin. Water and soil conservation measures, including sediment regulation and storage using reservoirs, effectively decreased water hazard and soil erosion in the basin. This study provides a scientific basis for the construction of water conservancy projects and ecological governance in the basin.

Analysis and Evaluation of the Benefits of Rural Land Remediation Planning in China

Compared with land improvement performance evaluation and post evaluation, the essence of the former is to conduct predictive analysis and evaluation of events that have not occurred, while the latter can directly use indicator data that has occurred for analysis. This article conducts corresponding benefit analysis and evaluation of comprehensive land consolidation work through qualitative and quantitative evaluation, closely focusing on the goals and tasks of national land consolidation planning and provincial land use overall planning, and coordinating and arranging projects such as land consolidation, reclamation and development, and urban-rural construction land increase and decrease linkage. By utilizing urban land consolidation models such as old city renovation, we aim to improve the efficiency of urban land use and increase the effective area of urban construction land. In accordance with the requirements of the new rural construction, efforts will be made to strengthen land consolidation, concentrate on promoting land leveling and the construction of farmland water conservancy, field roads, and field protective forests, and effectively promote the scale and industrialization of agriculture; Efforts will be made to promote village renovation and form a new rural pattern with relatively concentrated housing and beautiful environment.

Design and implementation of intelligent reservoir inspection system based on Internet of Things and deep learning

The safety test of reservoir dam is the focus of reservoir safety management. Aiming at the technical and management problems in the traditional inspection methods, this paper proposes an intelligent inspection system of reservoir based on Internet of things and deep learning. Based on the Internet of things and deep learning technology, the system constructs a system architecture including perception layer, information fusion layer, intelligent diagnosis decision-making layer and inspection terminal layer, which realizes the inspection requirements of intelligent perception, information fusion, safety identification, emergency management, etc. Taking ZhangJiang reservoir as an example, the intelligent inspection system of reservoir based on Internet of things is developed, which can meet the needs of daily management and safety management of reservoir. It is an important part of realizing intelligent water conservancy construction of reservoir engineering.

Characteristics and attribution analysis of runoff and sediment evolution in the Wei River mainstream, China

Abstract This study evaluates the characteristics of river runoff and sediment changes in the Wei River mainstream over the past 50 years based on runoff and sediment data and meteorological data from 1971 to 2020 at the Huaxian hydrological station in the lower reaches of the Wei River. The main research methods are the Mann–Kendall method, wavelet analysis, cross-wavelet analysis, and cumulative curve method. The results show that there is no significant decreasing trend and abrupt change in runoff volume in recent years, the decreasing trend of sediment transport is obvious, and the abrupt change occurs around 2006. The dominant periodicity of runoff is 12–13a, and the dominant periodicity of sediment transport is 5a. There is only a significant resonance periodicity of 3–5a in 1980–1990, which is roughly a positive correlation. The runoff–sediment series can be divided into four time periods, and the reasons for the change in the runoff–sediment relationship are different in each time period. The precipitation factor has a slightly greater impact on runoff and a weak impact on sediment transport, with contribution rates of 21.2 and 7.6%. Human activities such as subsurface changes and water conservancy construction have a greater impact on runoff and sediment load, with contribution rates of 78.8 and 92.4%.

Research and Analysis of Promotional Policies for Small Hydropower Generation in Taiwan

To achieve the net zero emission target by 2050, Taiwan is committed to promoting solar photovoltaic and offshore wind power. However, in order to ensure the stable supply of renewable energy, it should actively develop low-cost and mature base load renewable energy sources, such as small hydropower. By the end of 2021, Taiwan’s hydropower (excluding pumped storage hydropower) had a total installed capacity of 2094 MW, accounting for 18.6% of the overall renewable energy ratio, with an average growth rate of 0.05% from 2016 to 2021. It is mainly limited by the need for low environmental and ecological impact, so it is relatively difficult to install large-scale hydropower; therefore, Taiwan has turned to the development of environmentally friendly small hydropower generation. In order to actively develop small hydropower generation and resolve development concerns, Taiwan has established a “Small Hydropower and Renewable Energy Development Strategy Platform”. The current effective cases are mostly in the fields of the Taiwan Power Company, Water Resources Agency, and Council of Agriculture. The private sector has not yet shown its investment in the field. The reasons for this can be summarized as cumbersome administrative procedures, regulatory restrictions, insufficient economic incentives, and lack of technical capacity. The higher-level supervision mechanisms (such as the Executive Yuan level) are also the main key to whether small hydropower can be quickly promoted. In view of this, this study analyzes the current situation and policies to promote small hydropower generation policy recommendations through a literature review and comparison of international promotion experience. Some recommendations have also been incorporated into the newly revised Renewable Energy Development Act in 2023, such as relaxing the definition of small hydropower generation and incorporating water conservancy construction facilities that can be combined with power generation to improve site diversification. Other suggestions mentioned in the text can also be used as a reference for subsequent policy promotion in the future.

GRACE Data Quantify Water Storage Changes in the Shiyang River Basin, an Inland River in the Arid Zone

Global changes and human activities have significantly altered water cycle processes and water resource patterns in inland river basins in arid zones. New tools are needed to conduct more comprehensive and scientific assessments of basin water cycle processes and water resource patterns. Based on GRACE satellite and Landsat data, this study investigated terrestrial water storage changes and surface water area in the Shiyang River Drainage Basin from 2002 to 2021. It explored the effects of climate change and water conservancy construction on terrestrial water storage changes in the basin. The results of the study show that, although the surface water quantity in the Shiyang River basin has increased in the past 20 years, the overall decreasing trend of terrestrial water storage in the basin of the Shiyang River has an interannual decreasing rate of 0.01 cm/a. The decreasing trend of water storage in the midstream and downstream areas is more prominent. The change in precipitation controls the change in water storage in the Shiyang River Drainage Basin. Artificial water transfer has changed the spatial distribution of water resources in the basin of the Shiyang River. However, it still has not completely reversed the trend of decreasing water storage in the middle and lower reaches of the Shiyang River.

Regional Allocation Design and Efficiency Improvement of Rural Water Conservancy Project in China

Different development levels and speeds in different regions in China leads to the great difference in the allocation of rural water conservancy projects and the inefficiency. In order to improve the services function and configuration efficiency of rural China water conservancy infrastructure from water engineering, water supply engineering, reservoir engineering, the work chose the Chinese provincial panel data from 2017 to construct input-output indicator evaluation system with super-efficiency DEA. Then we designed the rural area of configuration of water conservancy projects for comparative analysis and China’s current rural water conservancy project region configuration system of geographical network coverage. Finally, based on the configuration in the grid lines, the method was proposed for efficiency. In order to analyze the regional difference in input-output efficiency of rural water conservancy construction, the panel data of 2017 was selected to establish the input-output indicator system of management efficiency. The results of super efficiency DEA show the general situation of input-output efficiency of rural water conservancy construction in China is not good, while there are some differences among input-output efficiency of rural water conservancy construction in East, West, Middle of China. Besides, Qinghai, Beijing, Hainan and Tibet are located in the last four. Finally, the four regions are all relatively effective with less than 100% super efficiency value, and four regions has redundant input in hydropower investment.

Research on Intelligent Grading Evaluation of Water Conservancy Project Safety Risks Based on Deep Learning

With the rise of artificial intelligence and big data technologies, it is increasingly significant to apply these emerging technologies to scientific decision-making in water conservancy project construction management in the face of many problems in the process of water conservancy project construction. Different from using traditional assessment methods for risk classification of water conservancy construction hazards, this paper integrates a priori attention and constructs a transformer risk prediction model based on a sliding window, which deeply explores the data value of water conservancy construction hazards information, further predicts the risk level of water conservancy construction hazards and realizes efficient and intelligent management of water conservancy project construction hazard identification management.

Complicated Time-Constrained Project Scheduling Problems in Water Conservancy Construction

Water conservancy project scheduling is an extension to the classic resource-constrained project scheduling problem (RCPSP). It is limited by special time constraints called “forbidden time windows” during which certain activities cannot be executed. To address this issue, a specific RCPSP model is proposed, and an approach is designated for it which incorporates both a priority rule-based heuristic algorithm to obtain an acceptable solution, and a hybrid genetic algorithm to further improve the quality of the solution. In the genetic algorithm, we introduce a new crossover operator for the forbidden time window and adopt double justification and elitism strategies. Finally, we conduct simulated experiments on a project scheduling problem library to compare the proposed algorithm with other priority-rule based heuristics, and the results demonstrate the superiority of our algorithm.

A Slope Structural Plane Extraction Method Based on Geo-AINet Ensemble Learning with UAV Images

In the construction of large-scale water conservancy and hydropower transportation projects, the rock mass structural information is often used to evaluate and analyze various engineering geological problems such as high and steep slope stability, dam abutment stability, and natural rock landslide geological disasters. The complex shape and extremely irregular distribution of the structural planes make it challenging to identify and extract automatically. This study proposes a method for extracting structural planes from UAV images based on Geo-AINet ensemble learning. The UAV images of the slope are first used to generate a dense point cloud through a pipeline of SfM and PMVS; then, the multiple geological semantics, including color and texture from the image and local geological occurrence and surface roughness from the dense point cloud, are integrated with Geo-AINet for ensemble learning to obtain a set of semantic blocks; finally, the accurate extraction of structural planes is achieved through a multi-semantic hierarchical clustering strategy. Experimental results show that the structural planes extracted by the proposed method perform better integrity and edge adherence than that extracted by the AINet algorithm. In comparison with the results from the laser point cloud, the geological occurrence differences are less than three degrees, which proves the reliability of the results. This study widens the scope for surveying and mapping using remote sensing in engineering geological applications.