scholarly journals Evaluation of River Ecological Status in Plain River Network Area under the Background of Urbanization

2021 ◽  
Author(s):  
Li Ren ◽  
Shuping Song ◽  
Yue Zhou
Keyword(s):  
Evaluation Model ◽  
Ecological Status ◽  
Reference Value ◽  
Ecological Condition ◽  
River Network ◽  
Jiangsu Province ◽  
Evaluation Indexes ◽  
Network Area ◽  
Impact Of Urbanization ◽  
The Impact

Abstract 21 main streams and tributaries of typical rivers in Jiangsu Province were taken as the research objects to evaluate river ecological status under the background of urbanization in this paper. A system of river ecological evaluation indexes and the evaluation model for plain river network area were constructed, including 4 indexes of aquatic environment, natural ecological system, social service function and water management and protection, and 12 pieces of divided criteria. The ecological status of these rivers in Jiangsu Province was evaluated, of which 71.4% were good. Analyzing the impact of urbanization on the ecological condition of rivers, we came to the conclusion that the level of river ecological status is decreasing with the improvement of urbanization level, and put forward that the reference value of the ISC red line of river ecological condition from good to medium in the urbanization plan of ecological river construction is 28%.

Modern Methods of Rapid Assessment of the Ecological Status of Marine Areas In Situ with Vertical Sounding

2020 ◽  
Vol 8 (1) ◽  
pp. 11-19
Author(s):  
Natal'ya Lyamina ◽  
M. Kosovskaya ◽  
A. Lyamin ◽  
S. Kosovskaya
Keyword(s):  
Marine Environment ◽  
Light Emission ◽  
Abiotic Factors ◽  
Rapid Assessment ◽  
Ecological Status ◽  
Marine Ecosystems ◽  
Ecological Condition ◽  
Anthropogenic Factors ◽  
Formation Mechanisms ◽  
The Impact

The study of marine ecosystems’ spatial structuring, interaction of these ecosystems’ various components and investigation of their heterogeneity formation mechanisms are among the most important problems of modern hydro ecology. Bioluminescence as manifestation of an organism vital activity in the form of electromagnetic radiation in the visible spectrum is the most important ecological and optical factor of the marine environment. The impact of biotic, abiotic and anthropogenic factors can significantly change the characteristics of aquatic organisms’ light emission. It is of immediate interest to assess the marine ecosystems’ current state on bioluminescence field’s parameters variability, as it can serve as a sensitive indicator for the degree of plankton organisms’ resistance to the effect of pollutants, and as an express indicator for marine environment’s local and regional pollution. Has been demonstrated the possibility of using the modern probing hydro-biological complex «Salpa-MA» with computer processing of the measured information for the rapid assessment of coastal waters’ ecological condition. This complex allows in a short time in marine environment to obtain synchronous integrated assessments of biotic and abiotic factors, and using laboratory processing of obtained data to reveal marine organisms’ functional linkages with environmental factors, and identify the features of these organisms development.

scholarly journals Evaluation of the level of human impact on the river sediments in Russia

2019 ◽  
Vol 135 ◽  
pp. 01051
Author(s):  
Valentina Kurochkina
Keyword(s):  
Water Quality ◽  
Water Body ◽  
River Sediments ◽  
Ecological Status ◽  
Ecological Condition ◽  
Water Bodies ◽  
Water Control ◽  
Anthropogenic Pressures ◽  
Channel Processes ◽  
The Impact

The growing race of urbanization and population growth lead to anthropogenic load on the water is increasing all the time. High population density and considerable industrial potential of the urbanized territory are becoming dominant sources of pollution of water bodies. This trend identifies progressive pollution of water bodies and the growing need for sanitary-ecological status of water control facilities. Natural chemical composition and properties of water in surface water bodies are formed depending on the hydrological, soil, climate and other features. Flowinduced suspensions in urban watercourses is one of the main ways of contamination distribution in urbanized areas. For monitoring and reducing the negative impacts on the water quality of watercourses requires estimation of anthropogenic pressures and studying its spatio-temporal variability. Analysis of anthropogenic stress on water objects allows you to set the relationship between the number of coming in the water body of pollutants and concentrations of chemicals in the water. The main aim is to determine the amounts of contaminants accumulated in the river riverbed during the period of the economic utilization of the watercourse and to assess the impact of urbanization on its ecological status. The article deals with the influence of anthropogenous load on river hydraulics and properties of channel sediments that determine the course of channel processes and overall ecological condition of water objects. The interrelation between water body condition, water quality and sediment pollution is presented. Method of estimation of anthropogenous load pollutants in river of urban area sis proposed. Comparative analysis of the load for the rivers of Russia with various water run-off is demonstrated.

scholarly journals CHINESE AIRLINE COMPETITIVENESS EVALUATION BASED ON EXTENDED BINARY RELATIVE EVALUATION(BRE) MODEL

2013 ◽  
Vol 14 (Supplement_1) ◽  
pp. S227-S256 ◽  
Author(s):  
Chong Wu ◽  
Xin Wang ◽  
Xinying Zhang ◽  
Yongli Li ◽  
Brad O’Brien
Keyword(s):  
Comprehensive Evaluation ◽  
Evaluation Model ◽  
Evaluation Index System ◽  
Analytic Hierarchy ◽  
Index Set ◽  
Evaluation Indexes ◽  
Model Based ◽  
And Performance ◽  
Improved Model ◽  
The Impact

In order to eliminate the impact of the sample's objective merits on the evaluation results, this research built a two-stage model of Chinese airline competitiveness evaluation to reflect the subjective management and performance. In the first stage, Analytic Hierarchy Process (AHP) and Factor Analysis (FA) models were used to analyze the data from 2008 to 2009. In the second stage, two kinds of comprehensive evaluation indexes in 2008 were taken as the reference index set, and two kinds of comprehensive evaluation indexes in 2009 as the current index set. The four sets of data were calculated with the Group Decision-making Model Based on Data Envelopment Analysis (DEA) with Restraint Cone. This paper has (1) enriched the theory of airline competitiveness,(2) built a more scientific and comprehensive evaluation index system of airlines’ competitiveness, (3) constructed a competitiveness evaluation model based on BRE, and (4) conducted an empirical study of the improved model based on the 2008 and 2009 data from 15 Chinese airlines. The ranking results of the proposed method, theory and model coincide with the real conditions of the airline market demonstrating that our evaluation of airline competitiveness based on BRE is accurate, reliable and objective.

scholarly journals DEVELOPMENT OF INCLUSIVITY IN THE FIELD OF RECREATIONAL NATURE MANAGEMENT ON THE EXAMPLE OF BEACH TERRITORIES

2020 ◽  
Vol 22 (2(75)) ◽  
pp. 122-134
Author(s):  
N.I. KHUMAROVA ◽  
H.O. TIUTIUNNYK ◽  
N.V. VERNIHOROVA
Keyword(s):  
Natural Resources ◽  
Ecological Status ◽  
Economic Assessment ◽  
Ecological Condition ◽  
The State ◽  
Social Needs ◽  
Nature Management ◽  
Special Role ◽  
Shore Protection ◽  
The Impact

Topicality. Ensuring inclusiveness in the field of recreational nature management plays a special role in the system of economic development of the country and further integration into the European Union.The modern institutional base is rather fragmentary in terms of administrative regulation of beach areas - the environment of a set of valuable natural resources that are attractive for business development.This leads to the impossibility of effective economic assessment of territories, preservation of their ecological status, and as a consequence prevents the pursuit of global economic trends.Aim and tasks. The purpose of the article is to reveal the characteristics of an inclusive approach and outline the components of the organization and development of beach areas. Formulation of criteria for creating an inclusive beach. Substantiation of introduction of principles of the organization of inclusiveness of recreational natural resources on an example of the beaches which have received the Blue Flag status.Research results. The authors consider the legislative basis, strategies and action plans for the protection of the marine environment of Ukraine and its use. The rules of use of shore protection structures, which are places of mass recreation, are presented and contradictions are revealed in them. The principles of inclusive use of beach areas are declared. The state of pollution of beach areas, methods of assessing the impact of economic activities on marine ecosystems, the state of tourist flows and proposals are analyzed.Conclusion. It is substantiated that there is no scientific theoretical basis, and in the legislative field there is no single legal act that regulates the issues of beach areas, their pollution, the relevant economic relations. It is substantiated that there is no zoning of beach areas and their ecological condition is not taken into account when calculating the cost of rent. At an insufficient level - compliance with the social needs of different segments of the population and ensuring the care, use and protection of the contact area as a whole. The necessity of using tax policy, rent payments based on economic assessment of natural recreational resources taking into account the ecological component is substantiated.

“Land fever” and “Bankruptcy”: Social Problems in Hanoi’s Urbanizing Peri-urban Communities

2019 ◽  
Vol 5 (5) ◽  
pp. 550-562
Keyword(s):  
Rural Communities ◽  
Urban Communities ◽  
Agricultural Production ◽  
Social Problems ◽  
Social Issues ◽  
Field Research ◽  
Credit Market ◽  
Urbanization Process ◽  
Impact Of Urbanization ◽  
The Impact

Drawn upon field research in two peri-urban villages of Hanoi in 2014 and short re-visits recently, the research examines the widespread of gambling and other social issues in Hanoi’s urbanizing peri-urban communities which happened concurrently with the phenomenon of “land fever,” and at the time local villagers received compensation from land appropriation. The article aims to understand the impact of urbanization on these communities and the interface between urbanization and the increase of social problems. It argues that gambling, drug use, and other social problems have been existing in Vietnamese rural communities long before; however, when urbanization came, some people have higher chances to engage in these activities. Those are villagers who want to transform quickly into entrepreneurs or bosses by joining the “black credit” market and gambling. Together with middle-aged and old farmers who greatly relied on agricultural production and face difficulties in transforming their occupation, they formed the group of losers in the urbanization process. Received 6th January 2019; Revised 26th April 2019; Accepted 15th May 2019

scholarly journals Assessment of the Impact of Small Hydropower Plants on the Ecological Status Indicators of Water Bodies: A Case Study in Lithuania

Water ◽  
2021 ◽  
Vol 13 (4) ◽  
pp. 433
Author(s):  
Laima Česonienė ◽  
Midona Dapkienė ◽  
Petras Punys
Keyword(s):  
Water Quality ◽  
Benthic Macroinvertebrates ◽  
Suspended Solids ◽  
Ecological Status ◽  
Fish Abundance ◽  
Water Bodies ◽  
Small Hydropower ◽  
Hydropower Plants ◽  
Physico Chemical ◽  
The Impact

Hydropower plants produce renewable and sustainable energy but affect the river’s physico-chemical characteristics and change the abundance and composition of the aquatic organisms. The impact of large HPPs on the ecological conditions of surface water bodies have been extensively studied, but less attention has been paid to environmental impact studies of small hydropower plants (SHPs). The impact of hydropeaking on both the river flow regime and ecosystems has been well-studied for peaking mode plants, mainly medium to large-sized ones. However, for small hydroelectric power plants, and especially for those in lowland rivers, the available information on water quality, benthic macroinvertebrates communities and fish abundance, and biomass is not sufficient. Ten small hydropower plants were selected, and the ecological status of water bodies was assessed in different parts of Lithuania. The studies were performed at the riverbed upstream from the SHPs, where the hydrological regime has not changed, and downstream from the SHPs. It was found that the small hydropower plants do not affect the physico-chemical values of the water quality indicators. This study demonstrated that the total number of benthic macroinvertebrates taxa (TS) is influenced by the concentration of nitrogen and suspended solids, the water flow, the river area, and the current speed; the number of EPT (Ephemeroptera (mayflies), Plecoptera (stoneflies), and Trichoptera (caddisflies)) taxa is influenced by the concentration of nitrogen and suspended solids. The studied indicators do not have a significant impact on biomass. The SHPs affect the fish abundance and biomass. The Lithuanian fish index (LFI) is influenced by the average depth and area of the river. Some SHPs operating in lowland areas may yield somewhat significant hydrograph ramping but more detailed investigation is needed to support the significance of this impact on the biological indices.

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