A Comprehensive Method for Water Environment Assessment considering Trends of Water Quality

Bi, Sheng; Wang, Li; Li, Yongrong; Zhu, Zhenping; Wang, Zhimian; Ding, Xin; Zhou, Jiang

doi:10.1155/2021/5548113

Cited by 11 publications

(5 citation statements)

References 21 publications

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“…NH 3 -N is significantly negatively correlated with DO and positively correlated with TN. The reason is that TN refers to the total nitrogen content in various forms of inorganic nitrogen (nitrate nitrogen, nitrite nitrogen, ammonia nitrogen) and organic nitrogen in water [34][35][36]. When large quantities of domestic sewage, farmland wastewater or industrial wastewater containing nitrogen are discharged into the water, the content of organic and inorganic nitrogen compounds in the water and the total nitrogen content increase, and biological and microbial species reproduce in large quantities, so that the dissolved oxygen in the water is increased [37].…”

Section: Analysis Of Water Quality Characteristic Factorsmentioning

confidence: 99%

Water Environment Characteristics and Water Quality Assessment of Water Source of Diversion System of Project from Hanjiang to Weihe River

Chen

et al. 2023

IJERPH

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The water source of the water diversion project from the Hanjiang River to the Weihe River is one of the most important drinking water sources in China. Its water quality is related to the water safety of the long-distance water diversion system from the Hanjiang to Weihe Rivers. In order to explore the spatiotemporal change trend of the water environment characteristics of the water source area and analyze the key factors that have a greater impact on it, this study collected 9 types of water environment physical and chemical parameters from 10 water quality monitoring sections from 2017 to 2019; the water environment characteristics of the water source area of the water diversion system from the Hanjiang River to the Weihe River were analyzed and evaluated by using the variance analysis method, the hierarchical cluster analysis method and the water quality identification index evaluation method. The results were as follows. (1) There was spatiotemporal heterogeneity in a number of physical and chemical parameters in the water body of the water source. In terms of time, the concentrations of CODMn, COD, BOD5 and F− were higher in the flood season (July–October) than in the non-flood season (November–June). The concentrations of DO, TP and TN in the non-flood season were higher than those in the flood season. Spatially, the concentration of physical and chemical parameters of the water body in the Huangjinxia Reservoir area was higher than that in the Sanhekou Reservoir area. (2) The water quality of the water source area was good. The comprehensive water quality reached the Class II water quality standard of surface water environmental quality. Time showed that the comprehensive water quality in the non-flood season was better than that in the flood season. Spatially, the overall water quality of the tributaries was better than that of the mainstream. TN is a key indicator that affects water quality. (3) The spatial and temporal differences in water quality in water source areas are mainly affected by factors such as rainfall, temperature and human activities. This study can provide a scientific and data basis for related research on maintaining and improving the quality of the ecological environment of the water source areas of the Hanjiang to Weihe River Water Diversion System.

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Section: Analysis Of Water Quality Characteristic Factorsmentioning

confidence: 99%

Water Environment Characteristics and Water Quality Assessment of Water Source of Diversion System of Project from Hanjiang to Weihe River

Chen

et al. 2023

IJERPH

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“…(3) Water quality We adopted a comprehensive pollution index (I) to assess the water quality of the river [41]:…”

Section: ) Precipitationmentioning

confidence: 99%

Temporal–Spatial Variations in the Economic Value Produced by Environmental Flows in a Water Shortage Area in Northwest China

Yue

Song

2023

Sustainability

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Scientific and accurate assessments of the economic value produced by environmental flows are an important basis for the protection of environmental flows by means of economics. Because of the temporal and spatial variation characteristics of environmental flows, it is more appropriate to study the economic value produced by environmental flows using a temporal–spatial scale rather than static calculations. In the present study, we combine the major influencing factors to establish the temporal–spatial calculation methods of the economic value produced by environmental flows using the assessment techniques of resources and environmental economics. The results obtained for the Wei River show that the annual variation range of the total economic value is CNY 0.30–0.42 billion, and the unit economic value is 0.86–6.40 CNY/m3 during the non-flood season ranging from the years 1980 to 2017. In general, the monthly variation in the total economic value ranges from CNY 0.04 to 0.08 billion, and the unit economic value is 0.94–14.34 CNY/m3. Based on this result, the variation tendency of the total economic value is consistent with the changing trend of the environmental flows occurring in the river; however, the unit economic value presents a reverse pattern. Furthermore, the deficiency of environmental flows can lead to a significant increase in its unit economic value. This method presents a dynamic, small temporal–spatial scale assessment of the economic value produced by environmental flows. It can also provide theoretical support for the ecological compensation of environmental flow protection in rivers present in water shortage areas.

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“…This has made research more important in finding the maximum amount of human-made stress that can be put on natural systems, especially in getting a full picture of the environment [1,2]. Presently, the term "comprehensive environmental assessment" is fraught with ambiguity due to the diverse nature of the objects under evaluation, encompassing individual entities, their aggregates, and parameter aggregates used for object description [3][4][5]. This diversity is further compounded by variations in the objectives, methodologies employed, and the quantity of components subject to evaluation [6].…”

Section: Introductionmentioning

confidence: 99%

Advancing environmental assessment methodologies: A case study on Pentle's framework through component analysis for complex objective functions

Pavlichenko,

Aktymbayeva,

Koshim

et al. 2024

ijirss

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This paper explores the evolution and refinement of environmental assessment methods in response to contemporary challenges. While various methodologies exist, R. Pentle's proposed calculation method, represented by a multiple linear regression equation, stands as a significant contribution. However, this method requires refinement. To address this, the paper uses a case study approach within the State National Natural Park (SNNP) Katon-Karagay to investigate the impact of recreational load on tourist routes and the associated environmental load. Through component analysis, a complex objective function is developed within Pentle's framework, emphasizing the need for a standard-setting procedure and offering a fresh perspective on environmental functions. Rather than conventional rating scales, the study advocates for an innovative approach to delineating environmental scenarios. Importantly, this approach extends beyond environmental data analysis, offering applicability across diverse datasets, including economic and social inputs. The findings contribute to advancing environmental assessment methodologies, offering a versatile framework for understanding and managing the impacts of recreational and environmental loads in protected natural areas.

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A Comprehensive Method for Water Environment Assessment considering Trends of Water Quality

Cited by 11 publications

References 21 publications

Water Environment Characteristics and Water Quality Assessment of Water Source of Diversion System of Project from Hanjiang to Weihe River

Water Environment Characteristics and Water Quality Assessment of Water Source of Diversion System of Project from Hanjiang to Weihe River

Temporal–Spatial Variations in the Economic Value Produced by Environmental Flows in a Water Shortage Area in Northwest China

Advancing environmental assessment methodologies: A case study on Pentle's framework through component analysis for complex objective functions

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