A Practical Approach for Environmental Flow Calculation to Support Ecosystem Management in Wujiang River, China

Ni, Xiaokuan; Dong, Zengchuan; Xie, W.; Wu, Shuisheng; Chen, Mufeng; Yao, Hongyi; Jia, Wenhao

doi:10.3390/ijerph191811615

Cited by 11 publications

(4 citation statements)

References 41 publications

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“…Ren Peng (Peng & JIN, 2020) used the median theory to improve Tennant's method, and the results calculated can better respond to the seasonal changes of the Nandu River on Hainan Island. Xiaokuan Ni (Ni et al, 2022) proposed the T-FDC method and verified that the T-DFC method has strong applicability in the Wujiang River Basin, and the results can provide reliable technical support for the ecological flow management in the Wujiang River Basin. Tian Chen (Chen & Xingtao, 2022) improved the traditional Tennant method to make it more accurate and reasonable for the ecological flow calculation in Fen River Basin.…”

Section: Conclusion and Discussionmentioning

confidence: 88%

Research progress on “ecological flow”: CiteSpace analysis based on Web of Science Core Collection

Li,

Fang,

Cheng

2023

Preprint

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With the gradual development of the restoration and protection of the water ecosystem, the research and safegard of ecological flow have received much attention. However, there is a lack of systematization of the literature in the field of “ecological flow” and a lack of in-depth understanding of the main and topical contents of the research in this field. In order to gain an in-depth understanding of the progress and current status of research on ecological flows, this paper searched Web of Science core databases for scientific papers published from 1999 to 2021 on the topic of “ecological flow”. The retrieved 18,128 research papers on ecological flows were also visualized and analyzed by using CiteSpace software for documents per year, category, country and institution distribution, co-citation, and clustering. The results show that research papers on ecological flows have shown an increasing trend since 1999. The categories of disciplines involved cover a wide range of disciplines such as environmental science and ecology, water resources, and so on. The United States ranks first in the number of publications and has a high influence. A total of five clusters were obtained through keywords clustering, with more overlapping areas, hydrological modeling, and aquatic ecosystems are the mainstream of research in the field of ecological flow. “Ecological flow” is still in a phase of rapid development, with the depth of research gradually increasing and the breadth of research expanding. In a long time, the keywords “r package”, “ecological flow”, “loess plateau”, “yellow river” and “emission” will be the center of the field of “ecological flow”.

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Section: Conclusion and Discussionmentioning

confidence: 88%

Research progress on “ecological flow”: CiteSpace analysis based on Web of Science Core Collection

Li,

Fang,

Cheng

2023

Preprint

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“…Mishra et al (2019), assessed the Correlation between the Tennant method and Standardized Precipitation Index for predicting environmental ow conditions using rainfall in Godavari Basin, the study attempted to correlate the concepts of Tennant and SPI to explore the ability of SPI to predict environmental ow conditions using rainfall. Ni et al (2022), estimated environmental ow calculation to support ecosystem management in Wujiang River, China. The results show that the environmental ow of the Wujiang River can be divided into ve levels by the T-FDC method, with a level-by-level disparity, and all levels can capture the temporal and spatial variability of the river ow.…”

Section: Literature Reviewmentioning

confidence: 99%

Modification and Development of the Tenant Method to Maintain Ecological Regime in Environmental Flow Management of Rivers

Khatar

Shokoohi

2023

Preprint

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The allocation of environmental flows should be done through legislation based on fundamental studies, while this does not seem to be the case in Iran, and the Tenant method for determining river water rights without assessment has been dictated to the responsible organizations. The main problem of the Tenant method is the allocation of a fixed amount to the environmental flow as a percentage of the average annual flow and therefore the inability to comply with the ecological regime of the river. The main reason for the attention of the country's water authorities to the Tenant method is that in this method as a hydrological method, the long-term average flow in the river is used, which is firstly easily available and secondly does not have to follow the allocation time pattern. In this regard, the responsible agencies can deliver the entire flow allocated to the environment in a volumetric manner over a period of time rather than actual environmental needs. Previous studies have suggested substitute methods concerning the problems of the Tenant method, but in the present study, the promotion of this method has been put on the agenda instead of offering a new method. The substitute methods, which are generally offered by prioritizing the environmental sector in developed countries of the Northern Hemisphere such as the United States, and the Southern Hemisphere such as Australia, are not welcomed in areas facing persistent water shortages and successive droughts. While everyone recognizes that sustainable development has three pillars of economic, social, and environmental justice, and without respect for environmental rights cannot achieve development goals to reach social welfare, the provision of environmental water rights is at the bottom of this circle and has the lowest priority in developing countries. In the present study, due to the importance of the subject and non-admittance of the ecological methods with environmental focus and priority in Iran, the Tenant method was accepted as the only applicable method for allocating environmental flow, then considering the ability and feasibility of Habitat simulation methods changes were made to enhance the Tenant method. In the enhanced Tenant method, instead of considering a fixed value for the whole or half of the year, first using the flow duration curve, the hydrological condition of the river is determined each month. Then, based on the normal, dry, or wet condition of the desired month, and employing the five Tenant scenarios for the management of the river ecosystem, the environmental flow is determined. Accordingly, the developed method, by allocating a percentage of the average monthly flow, practically follows the historical regime of the river without creating a conflict with the requirements of the existing habitats. The results showed that the algorithm used to develop the Tenant method, in addition to success in a proper simulation of -inter-seasonal changes in the river has been able to reduce the annual volume allocated to the environmental flow in the same range recommended in the conventional Tenant method, i.e. within the acceptable range in the opinion of the government.

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“…The environmental flow rate is important to preserve the existing ecosystem. Ni et al [14] designed a methodology for the environmental flow, also known as T-FDC. The methodology allows the construction of flow duration curves by grouping flow data monthly from different years, in order to better represent the temporal variability of the flow of water bodies.…”

Section: Flow-rate Measurementmentioning

confidence: 99%

Platform for Micro-Hydro Generation in Rural Areas of Ecuador

NARVAEZ,

CANDO,

PAZ-BARZOLA

et al. 2023

WIT Transactions on Ecology and the Environment

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Access to electricity is essential for economic development and improving the quality of life, yet many rural communities in Ecuador lack this basic need. Micro-hydro generation has the potential to provide electricity to these communities, but the process of setting up a micro-hydro generation system can be complex and difficult to manage. The present study proposes to address this issue by developing a web platform that provides all the necessary tools and resources for setting up and managing a micro-hydro generation system in rural areas. The platform uses hydraulic potential calculations based on river flow and head to select the most suitable turbine for the community conditions. This methodology has been validated, and a user-friendly graphical interface has been developed to enter the relevant information on hydraulic potential. The platform performs these calculations using Python, proposing a design for the selected turbine that ensures the best performance. One of the key features of the platform is its ability to act as a hub for information exchange between rural communities and experts, promoting a more informed and effective approach to micro-hydro generation. To illustrate the effectiveness of the platform, a case study of the rural communities of Guayllabamba has been presented. This demonstrates how the platform can obtain a suitable Francis turbine for microgeneration that can provide electricity for housing, agriculture, and improve the quality of life of the community. The results show the components that will be included in the beta version of the web platform, which will facilitate the selection of the most suitable turbine for micro-hydro generation, design implementation, and estimation of the hydraulic potential of a given area based on input parameters and satellite imagery. This effort represents a crucial step towards promoting sustainable energy solutions in rural areas and contributing to a more sustainable energy future for the country.

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A Practical Approach for Environmental Flow Calculation to Support Ecosystem Management in Wujiang River, China

Cited by 11 publications

References 41 publications

Research progress on “ecological flow”: CiteSpace analysis based on Web of Science Core Collection

Research progress on “ecological flow”: CiteSpace analysis based on Web of Science Core Collection

Modification and Development of the Tenant Method to Maintain Ecological Regime in Environmental Flow Management of Rivers

Platform for Micro-Hydro Generation in Rural Areas of Ecuador

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