scholarly journals An Assessment of Hydropeaking Metrics of a Large-Sized Hydropower Plant Operating in a Lowland River, Lithuania

Water ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1404
Author(s):  
Linas Šilinis ◽  
Petras Punys ◽  
Algirdas Radzevičius ◽  
Egidijus Kasiulis ◽  
Antanas Dumbrauskas ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Impact Assessment ◽  
Environmental Impact Assessment ◽  
Coefficient Of Variation ◽  
Main Idea ◽  
Hydropower Plant ◽  
Lowland River ◽  
Mountainous Regions ◽  
Rapid Flow ◽  
Using Data

This paper discusses rapid flow and stage fluctuations in a large lowland river downstream from a large hydropower plant (HPP) in Lithuania. The main problem arises when the HPP is operating in peak mode. Such operation of HPP causes rapid flow and stage fluctuations, which can have a certain impact on river ecosystems. The study analyzes general abiotic indicators such as upramping and downramping rates and stage fluctuations downstream of the HPP. The main idea was to assess recorded stage upramping and downramping rates along the river downstream of large HPP. To assess stage fluctuation statistics, COSH software was used. A maximum upramping rate of 1.04 m/h and maximum downramping rate of 0.88 m/h were identified using data from temporary and permanent gauging stations. Obtained results revealed that stage fluctuations exceed ecologically acceptable rates up to 20 km downstream of HPP. The effect of hydropeaking fades out only at a chainage of 45 km downstream of HPP. In mountainous regions, ecologically acceptable rates are reached at much smaller distances. The study shows that the traditional coefficient of variation of stage fluctuation data can be used to describe hydropeaking indicators. The main results of this study can be used for environmental impact assessment downstream from HPPs.

scholarly journals DEVELOPMENT AND IMPLEMENTATION OF ELECTRONIC SERVICE FOR ENVIRONMENTAL IMPACT ASSESSMENT FROM PLANNED ROAD CONSTRUCTION ACTIVITIES

2020 ◽  
Author(s):  
Anna Kharchenko ◽  
◽  
Ylia Khrutba ◽  
Keyword(s):  
Environmental Impact ◽  
Impact Assessment ◽  
Environmental Impact Assessment ◽  
Desirability Function ◽  
General Structure ◽  
Main Idea ◽  
External Information ◽  
Electronic Service ◽  
The Impact ◽  
Basic Version

The main idea of the study was to automate the environmental impact assessment process. The subject of the research is the process of algorithmization and automation of environmental impact assessment. During the research, the methods of impact assessment as tools for analyzing the impact of road repair processes are considered in detail. And also the mathematical device which can be applied to an estimation of influence on environment of processes of construction and reconstruction of roads is algorithmized. The main aspects of the impact during the technological process of road repair, which formed the criterion basis for environmental impact assessment, are characterized and formed. The methodology of this study is based on the use of a combined approach to environmental impact assessment using the improved Leopold matrix and its further study using the Harrington function. At each stage of both the implementation of the stages of the environmental impact assessment and the processes themselves during the construction and reconstruction (repair) of the highway, the information can be presented in the form of different matrices. Based on the methodology and algorithm for quantifying the impact on the environment using the Leopold matrix and the Harrington desirability function, an electronic service – Electronic Calculator Environmental Impact Assessment (ECEIA) was developed. The general structure of the Electronic Service includes two main blocks: Block "Database" and Block of calculation, between which there is a direct relationship. Development and implementation of a basic version of a full-featured effective interactive e-service for independent environmental impact assessment according to clearly defined indicators and methods of their assessment contributes to the maximum reduction of the human factor in environmental impact assessment and prevention of possible corruption. When developing the basic version of the Electronic Service, the possibility of further implementation of its additional functions was taken into account, in particular, the possibility of further authorization of users through the use of EDS / QES was provided; expanding the criteria base for environmental impact assessment and technological processes for assessing their impact on the environment; integration of external information into the database of the Electronic Service; tracking and visualization of information on the results of environmental impact assessment of various types of planned activities.

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