Conservation Projects Research Articles

Construction Design of Slope Support Engineering in Water Conservancy and Hydropower Project

Slope support engineering is an important part of water conservancy and hydropower engineering, and its construction design plays a vital role in the safety and stability of the project. With the continuous development of water conservancy and hydropower project construction in China, the requirements for the construction design of slope support engineering are becoming higher and higher. Therefore, it is of great significance to deeply study and discuss the construction design of slope support engineering to improve the quality of the project and ensure the safety of the project. This paper mainly analyzes the construction design of slope support engineering in water conservancy and hydropower projects.

On the Construction Safety Control of Water Conservancy and Hydropower Projects

Water conservancy and hydropower project, as the core part of national infrastructure, has always carried the heavy responsibility of national economic development. With the progress of society and the rapid change of science and technology, water conservancy and hydropower projects have achieved unprecedented development in scale and technology. However, in this development trend, we have to face up to a crucial issue construction safety. Construction safety is not only directly related to the life safety of the construction personnel, but also related to the progress and quality of the whole project, and even affect the stability of the surrounding environment and the society. This paper aims to discuss the importance of construction safety control by analyzing the safety risks of water conservancy and hydropower project construction, and put forward a series of feasible control measures.

Analysis on Grouting Construction Technology and Quality Management Countermeasures of Water Conservancy and Hydropower Project

Based on the industry background, this paper comprehensively discusses the application points and quality management countermeasures of grouting construction technology in water conservancy and hydropower engineering. The key links of grouting construction technology are expounded, including the selection of grouting materials, optimization of drilling construction technology, reasonable selection of grouting method and scientific arrangement of grouting order. In view of the weak links in the quality management of grouting construction, the countermeasures and measures such as strengthening the audit of construction drawings, constructing the whole-process quality control system, strict quality acceptance standards, and strengthening the professional training of construction personnel are put forward. Through the fine application of grouting construction technology and the comprehensive optimization of quality management, the overall construction level and comprehensive benefits of water conservancy and hydropower projects can be effectively improved.

An experimental investigation of dispersive soils treated by microbially induced calcium carbonate precipitation (MICP)

Dispersive soils are frequently employed as construction materials in projects such as drains and dams in western Jilin, China. However, their propensity to disperse upon contact with water presents a grave threat to construction projects if left unaddressed. Therefore, following the identification of the fundamental physical and chemical properties, as well as the dispersivity of soils in the western region of Jilin Province, Sporosarcina pasteurii was chosen to conduct laboratory experiments and mechanistic studies aimed at improving dispersive soils in the area through MICP. The treatment effect of the soil samples was quantitatively assessed through tests including comprehensive dispersivity identification, unconfined compressive strength (UCS) measurement, and determination of calcium carbonate content. Furthermore, scanning electron microscope (SEM) tests were conducted to examine the microstructural alterations of the soil samples before and after microbial treatment. The experimental results showed that soil dispersion can be significantly reduced under various conditions, and increase the soil strength under certain condition. MICP facilitates the replacement of exchangeable Na+ in soil and induces the formation of calcium carbonate, which fills pores and acts as a cementing agent. Treating dispersive soil in western Jilin is crucial to ensuring the safe and normal operation of its water conservancy projects.

Listing Villages for Conservation: Practices and Impacts of the Village Conservation Project in China

ABSTRACT Due to the rapid destruction and disappearance of villages caused by mass urbanisation in China over the past decades, the Chinese government launched in the 1990s a nationwide ‘village conservation project.’ Villages are officially viewed as a fundamental component of Chinese society, integrating essential elements of Chinese heritage and culture. Consequently, the government has created multiple officially recognised lists to restore, protect, and showcase traditional villages, such as wenwu baohu danwei (cultural relics protection units), lishi wenhua mingcun (historical and cultural villages), chuantong cunluo (traditional villages), xiangcun lvyou zhongdiancun (rural tourism key villages), and meili yiju cunzhuang (beautiful and livable villages). By examining the implementation process of this ‘village conservation project’, this study reveals the motivations and impacts of the Chinese government’s efforts in listing villages for conservation and development. This study contributes to museum and heritage studies by providing a lens for understanding the conservation practices in rural areas in China.

Trade-Off and Synergy Mechanism of Agricultural Water Resource Spatial Allocation in Monsoon Climate Areas Based on Machine Learning: A Case Study of Reservoir Layout Optimization in Shandong Province, China

Influenced by increasing global extreme weather and the uneven spatiotemporal distribution of water resources in monsoon climate areas, the balance of agricultural water resources supply and demand currently faces significant challenges. Conducting research on the spatial allocation trade-offs and synergistic mechanisms of agricultural water resources in monsoon climate areas is extremely important. This study takes the spatial layout of reservoir site selection in water conservancy projects as an example, focusing on Shandong Province as the research area. During the site selection process, the concept of water resource demand is introduced, and the suitability of reservoir siting is integrated. It clarifies ten influencing factors for suitability degree and five influencing factors for demand. A bi-objective optimization model that includes suitability degree and demand degree is established. Utilizing machine learning methods such as the GA_BP neural network model and the GA-bi-objective optimization model to balance and coordinate the supply and demand relationship of agricultural water resources in the monsoon region. The study found that: (1) in the prediction of suitability degree, the influencing factors are most strongly correlated with the regulatory storage capacity (regulatory storage capacity > total storage capacity > regulating storage coefficient); (2) compared with single-objective optimization of suitability degree, the difference between water supply and demand can be reduced by 74.3% after bi-objective optimization; (3) according to the spatial layout optimization analysis, the utilization of water resources in the central and western parts of Shandong Province is not sufficient, and the construction of agricultural reservoirs should be carried out in a targeted manner. This study provides new ideas for promoting the efficient use of water resources in monsoon climate zones and the coordinated development of humans and nature, reflecting the importance of supply and demand balance in the spatial allocation of agricultural water resources, reducing the risk of agricultural production being affected by droughts and floods.

Children's perceptions shape primate conservation message in rural communities of the Barú District, Southwestern Panama.

Panama is a habitat for nine primate species, and most of them are threatened. This has shown a fundamental concern in primate conservation by Panamanian-based conservation projects. Among them is the project Conservación del Mono Cariblanco en Agroecosistemas (COMOCA) which initiated a primate conservation education program in Southwestern Panama in 2022. The first stage of this program consisted of evaluating the perceptions that 102 children aged 8-12 years old have about primate habitat. Ianalyzed drawings made by these children exploring three different themes: (1) description of primate species, (2) primate habitat, and (3) food related to primates. The results indicate that children are more familiar with the white-faced capuchins and squirrel monkeys. Despite 89.2% of the children drawing trees, most of them painted tree crops. Thus, the top three most mentioned foods eaten by monkeys were mango, plantain/banana, and apple. These findings highlight the importance of addressing the relationship between primates and native trees in the content of the conservation education program. Additionally, the study illustrates how children's depiction of their reality has implications for the management of human-primate interfaces.

Did we achieve what we aimed for? Assessing the outcomes of a human–carnivore conflict mitigation and coexistence project in Europe

Monitoring and evaluation practices, demanded by nature conservation project donors, often focus on practical outputs, leaving the assessment of intended short and medium‐term outcomes and long‐term impacts challenging. This study employs a merger of the conflict intervention triangle model (CITM) and its three dimensions relationship, substance, and process, together with the logical framework approach (LFA) within the context of a human–wildlife conflict and coexistence (HWCC) project (LIFE EuroLargeCarnivores) in order to assess project correlated outcomes on stakeholder level over time.Two stakeholder surveys were conducted across 14 project partner countries, capturing baseline perceptions in 2018 and assessing changes in 2021. To assess the actual influence of the project with its focus on conflict mitigation, we applied an ex post counterfactual analysis. Results indicate positive developments in all dimensions of the CITM. The influence of the project is demonstrated by statistically significant differences in response behavior between participants and non‐participants of project interventions. The overall outcome regarding beliefs in satisfactory future management of increasing large carnivore populations, is more intricate. Significant differences are observed among three selected main stakeholder categories over the project's timeframe. While nature conservationists maintain high confidence levels, confidence of hunters and livestock raisers declined. However, results for participants of project interventions depict a significantly lower decline in confidence compared to non‐participants. Based on our findings, we provide insights how to efficiently evaluate outcomes of HWCC projects, offering recommendations for wildlife conservation practitioners. We conclude that HWCC projects are important also and especially in times of unfavorable frame conditions. Rigorous evaluation methods are essential to ensure efficient use of resources in order to maximize the outcomes of HWCC projects. The study highlights the need for long‐term evaluation to assess broader impacts at country, regional, and sector levels.

Positivity Preserving and Mass Conservative Projection Method for the Poisson–Nernst–Planck Equation

Positivity Preserving and Mass Conservative Projection Method for the Poisson–Nernst–Planck Equation

New Acoustic Design for the Piscina Mirabilis Located nearby the Port of Misenum

Many heritage buildings from ancient Rome are being refurbished based on their original plan’s structure. One of them is the piscina mirabilis located nearby in Naples, which was a cistern used by the Romans to collect drinkable water for the navy waiting in the port of Misenum. The piscina mirabilis has similar architectural characteristics to a “cathedral”; however, its current precarious architectural state is the result of high levels of humidity that have caused the proliferation of mold on its vertical and horizontal surfaces over the centuries. Acoustic measurements were conducted inside the piscina mirabilis, highlighting an existing condition of the room being very reverberant, not suitable for occasional speech and conversations. The design proposed by the authors involves some mitigation solutions for the acoustics, mainly focused on controlling the low–medium frequencies and the realization of a restoration project consisting of a raised timber-floored walkway that runs along the perimeter walls, with the addition of water covering the existing floor as a natural element dominating the room volume, which represents the primary function of the building in antiquity. A waterfall was designed to be on the northern side wall. Acoustic studies were an important part of the refurbishment strategy, and a mitigation solution was devised to control medium–low frequencies by using inflated balloons of different sizes that were suspended from the ceiling vaults instead of widely used acoustic panels. The proposed strategy lowered the reverberation time by 3–4 s to accommodate a minimal level of conversational understanding. Such a solution is appropriate for this heritage building as well as other future conservation projects.

Impact of environmental concentrations of fipronil on DNA integrity and brain structure of Bombus atratus bumblebees

Fipronil (FP) is an insecticide used in the treatment and control of pests, but it also adversely affects bees. Currently, there is no data on the genotoxic effects of FP in the brain of bumblebees. Thus, through the comet assay and routine morphological analysis, we analyzed the morphological effects and potential genotoxicity of environmentally relevant concentrations of FP on the brain of Bombus atratus. Bumblebees were exposed at concentrations of 2.5 μg/g and 3.5 μg/g for 96 hours. After the exposure, the brains were removed for morphological and morphometric analysis, and the comet assay procedure - used to detect DNA damage in individual cells using electrophoresis. Our data showed that both concentrations (2.5 μg/g and 3.5 μg/g) caused DNA damage in brain cells. These results corroborate the morphological data. We observed signs of synapse loss in the calyx structure, intercellular spaces between compact inner and non-compact inner cells, and cell swelling. This study provides unprecedented evidence of the effects of FP on DNA and cellular structures in the brain of B. atratus and reinforces the need to elucidate its toxic effects on other species to allow future risk assessments and conservation projects.

Landscape changes of alpine grasslands in the Zhari Namco basin of the central‐southern Qiangtang plateau, 2001–2021

AbstractThe alpine grasslands of the Qiangtang Plateau face significant ecological risks due to extensive human activities, particularly in areas along lakeshores and riverbanks, where overgrazing has caused severe degradation and salinization of the grasslands. Conducting fieldwork in such environments presents significant challenges for long‐term community‐scale landscape ecological research. In this study, the habitat characteristics of dominant plant communities in the alpine basin of Zhari Namco were quantified from three perspectives: topography, hydrology, and fractional vegetation cover. Using Aster GDEM and Landsat imagery, five grassland types were mapped for 2001–2021. Based on the spatial variables of area, shape, and distance, 13 landscape indices were selected to observe spatiotemporal changes. The results revealed several key findings: (1) The patch structure of the zonal vegetation Stipa purpurea steppe has undergone a pattern of dispersion‐aggregation‐dispersion in the past 20 years, yet the core habitat area remains unchanged by more than 52%, indicating fundamental stability in the southern Qiangtang alpine grassland; (2) Using the minimally grazed Kobresia pygmaea meadow as a reference, other communities exhibit stability similar to or approaching it, but with significant differences in aggregation level. The gradual expansion of grazing and economic activities has been a driving factor; and (3) Water conservation projects have diversified the use of water resources in river and lakeside habitats. Stipa purpurea + Carex moorcroftii steppe and Carex swamp meadow exhibit optimal carrying capacity, making them the only areas with relatively high sustainability. The study underscores that the current ecological benefits are a result of effective management. However, without proper management, the region could trend towards landscape fragmentation, becoming the most vulnerable zone in the watershed. Therefore, it is essential to strengthen retrospective analysis of grazing intensity and trend analysis of habitat changes to provide a scientific basis for local economic development and grazing management.

A technological biodiversity monitoring toolkit for biocredits

Abstract Biodiversity is in crisis globally, and we consistently fail to hit global targets to stem its loss. Inspired by the Kunming‐Montreal Global Biodiversity Framework, the biodiversity credit market offers an avenue for vital funding for biodiversity conservation projects around the world. Various biodiversity credit methodologies and standards are becoming available, and most will require the measurement and monitoring of biodiversity at scale. Private investment in conservation through biodiversity credits entails specific needs for biodiversity data collection, including the need for biodiversity claims to be verifiable. We conceptualise these requirements around ‘SAGED’ criteria: Scalable, Accessible, Granular (data of appropriate spatial, taxonomic and temporal resolution), Evidenceable and Directly measured (where possible). Measuring and monitoring biodiversity across ecosystems, ecoregions and taxa is expensive and time‐consuming with traditional survey methods. These methods often rely on access to experts with sufficient taxonomic and survey expertise, which is challenging in many parts of the world. Accordingly, we review biodiversity monitoring technologies and assess their readiness to fulfil key requirements of assessments for the purpose of nature accounting for biodiversity credits (particularly SAGED criteria). We focus on monitoring technologies that are commonly cited by biodiversity credit methodologies, including (e)DNA metabarcoding, passive acoustic monitoring and various other remote sensing methods. We also explore the current limits of these techniques in obtaining appropriate biodiversity measures and metrics for biodiversity finance. Synthesis and applications. Technological solutions for biodiversity monitoring are not (yet) a panacea but are key for evidenceable monitoring at scale. For current use in biocredit markets, we advise these are combined with ground validation and human‐collected ecological data. Developments in automation and machine learning will rapidly make these technologies more accessible and efficient.

Discussion on the Application Management of Concrete Impermeable Wall in Water Conservancy and Hydropower Project

On the basis of the construction technology of concrete improof wall, this paper focuses on the difficult problems and application management measures in the construction process of concrete improof wall. This paper puts forward application management measures such as detailed analysis of geological conditions, determination of construction tools, using high quality wall mud, controlling the quality of concrete pouring, and treatment of joint holes. By adopting these measures, the construction quality of concrete anti-seepage wall can be effectively improved to ensure the safe operation of water conservancy and hydropower projects.

Carbon Footprint Quantification and Reduction Potential of Ecological Revetment in Water Net Region of China: Case Study in Yancheng, Jiangsu Province

With emphasis on constructing low-carbon cities, the renovation of the riverbank highlights energy conservation and carbon reduction. However, methods and standards for quantifying carbon emissions during ecological river channel construction are currently lacking. There is a scientific gap in research into carbon footprint assessment and reduction potential in ecological revetment technologies in water networks of China. This study attempts to clarify the carbon emission factors of different ecological revetment technologies and explore the carbon reduction potential during the construction stage of ecological rivers from the river revetment design, construction process and materials. The results show that in the carbon emission factors of six ecological revetment technologies, building materials have the largest adjusting potential for carbon reduction. The concrete material is responsible for 55.37–95.86% of carbon emissions in six ecological river technologies, with an average proportion of 69.96%. Accordingly, the concrete material emerges as the primary contributor to carbon emissions in ecological river engineering, followed by gasoline truck transportation and earthwork excavation. Moreover, the carbon emissions from ecological frame structures were the largest, followed by those of block structures, gabion structures, planted concrete and interlocking blocks and the wooden stake structure has the smallest carbon footprint. The choice of ecological revetment technologies is not only related to the realisation of regional water conservancy functions, but it also affects the carbon emissions of water conservancy projects. Engineers and decision-makers should pay great attention to the optimal design of the project, selection of low-carbon materials, energy saving and emission reduction in the construction process. This research not only provides guidance for design units in selecting appropriate river revetment technologies but also offers a theoretical foundation and data support for construction units to optimise their construction process management.

Demand for low-quality offsets by major companies undermines climate integrity of the voluntary carbon market

Most companies include carbon offsets in their net-zero strategy. However, many offset projects are poor quality and fail to reduce emissions as claimed. Here we focus on the twenty companies retiring the most offsets from the voluntary carbon market over 2020–2023. We examine if their offsets could be considered high quality and likely to benefit the climate. We curate an original company-level dataset to examine quality and climate benefits across four dimensions: (1) use of offsets from low/high-risk project types; (2) age of projects and credits; (3) price of credits; and (4) country of implementation. We find that companies have predominantly sourced low-quality, cheap offsets: 87% carry a high risk of not providing real and additional emissions reductions, with most offsets originating from forest conservation and renewable energy projects. Further, most offsets do not meet industry standards regarding age and country of implementation. These findings provide further evidence that the voluntary carbon market is not supporting effective climate mitigation. Particularly, we show that its persisting quality issues are exacerbated by the demand for low-quality offsets by individual companies.

Utilizing FSA conservation loan programs to support farm conservation activities

PurposeThe Farm Service Agency (FSA) conservation loan program was introduced in the 2008 Farm Bill to provide additional credit to assist producers implementing approved Natural Resources Conservation Service (NRCS) conservation projects. This paper explores why this program has been widely underutilized despite an overall increase in United States Department of Agriculture (USDA) Conservation Program participation.Design/methodology/approachThe FSA administrative loan data are merged with NRCS program participation and payments data for 2010–2021. The share of project costs paid by producers and resulting savings achieved by farmers participating in both programs if their cost-share portion was paid by FSA loans are estimated, as well as the impact on farmer conservation spending under different estimates of increased participation.FindingsA significant share of FSA farmers are likely to take advantage of NRCS programs, with the majority of participants paying under $25,000 in cost-share portions. These loans are less suited to guaranteed conservation loans and more appropriate for the discontinued direct conservation loan program. Few FSA borrowers participating in NRCS cost-share programs pay more than $50,000 in cost-share portions. These loans would receive the majority of benefits from interest reduction schemes under the current guaranteed loan program.Practical implicationsOur results and suggestions provide valuable information when discussing the Guaranteed Conservation Loan Program in the 2023 Farm Bill legislation.Originality/valueNo prior research has attempted to merge FSA guaranteed or direct loan data with conservation program participation and payment data, focused on producer cost-share levels or the FSA Guaranteed Conservation Loan Program in the last decade, making this study a valuable contribution to the literature.

Disembedding and Disentangling Grassland Valuation: Insights into Grassland Management Institutions and Ecological Research in China

After two decades of implementing top-down grassland restoration projects focused on reducing livestock numbers and pastoralist populations, the Chinese government’s well-funded efforts have not significantly reversed grassland degradation. This study reviews the institutional changes in grassland management over the past forty years, highlighting the Livestock and Grassland Double Contract Household Responsibility System of the early 1980s and the Grassland Ecological Reward and Compensation Policy introduced in 2011. It demonstrates how these institutional transformations have shaped pastoralists’ evolving understanding of grassland value and reveals that commodifying grassland’s economic and ecological value has led to the capitalization of nature, disembedding husbandry from grassland production, and undermining the effectiveness of conservation projects. This article also showcases the development of grassland ecology research in China, noting its increasing detachment from a holistic understanding of ecosystems and the interdisciplinary needs of management practices. The disjunction between grassland ecology research and practical management has resulted in a lack of techniques aligned with local ecological and socioeconomic contexts. This article champions active engagement with and protection of pastoralist communities to reintegrate grasslands’ true economic and ecological value into management practices, thereby effectively restoring degraded grasslands and achieving sustainable management.

Growth and allometric curves of southern brown howler monkey (Alouatta guariba): Insights on its ontogeny and conservation.

Ontogenetic sexual dimorphism is observed in different primate species, with ecological and evolutionary relationships explaining this pattern. Understanding the growth of the southern brown howler monkey elucidates not only the ecology and evolution but also contributes to conservation projects for this species. Throughout 20 years of the Centro de Pesquisas Biológicas de Indaial-Projeto Bugio, Brazil, we collected morphological data on 105 howlers of the Alouatta guariba species to identify the growth differences between ontogenetic categories and sexes and generate a growth curve to estimate the age of rescued individuals. Linear measurements were employed to obtain body length as well as the dimensions of the head and limbs. All individuals were also weighed to obtain body mass. We assessed growth rate and duration using allometric analysis based on the individuals' ages. We compared growth rate and duration among infant, juvenile, and adult howlers and between sexes. We provide growth curves for body size for both sexes using the Von Bertalanffy model. Infants have accelerated growth rate in comparison to the juveniles and adults, with no differences between sexes in establishing body length at this ontogenetic stage. Males have a prolonged development duration from the juvenile stage, reaching adulthood later than females, which explains the body length differences found in this species. Variables of head and limbs analyzed also showed differences in growth rate and duration, but not so consistently among ontogenetic stages. Mass was not a good variable to understand the growth differences of the animals, since many arrived feeble in the project and may have lost mass due to different circumstances in old age. Therefore, growth curves were obtained only for body length, allowing the estimation of the age of these animals when rescued from the wild to more effectively provide needed care in captivity.

ASO Visual Abstract: Breast Conservation Project: Clinical Outcomes of Extreme Oncoplastic Breast-Conserving Therapy versus Mastectomy for Large and Multiple Lesions.

ASO Visual Abstract: Breast Conservation Project: Clinical Outcomes of Extreme Oncoplastic Breast-Conserving Therapy versus Mastectomy for Large and Multiple Lesions.