Environmental impact assessment on water quality deterioration caused by the decreased Ganges outflow and saline water intrusion in south-western Bangladesh

2000 ◽  
Vol 40 (1-2) ◽  
pp. 31-40 ◽  
Author(s):  
Md. Mokhlesur Rahman ◽  
Muhammad Qumrul Hassan ◽  
Mohammad Saiful Islam ◽  
S. Z. K. M. Shamsad
Keyword(s):  
Water Quality ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Environmental Impact Assessment ◽  
Saline Water ◽  
Saline Water Intrusion ◽  
Water Intrusion ◽  
Quality Deterioration ◽  
Water Quality Deterioration

Random number generator or sewer water quality model?

2006 ◽  
Vol 54 (6-7) ◽  
pp. 387-394 ◽  
Author(s):  
P. Willems
Keyword(s):  
Water Quality ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Environmental Impact Assessment ◽  
Random Number Generator ◽  
River System ◽  
Assessment Model ◽  
Integrated Modelling ◽  
Water Quality Modelling ◽  
Quality Model

Integrated urban drainage modelling and environmental impact assessment require sewer emission models to be linked with submodels for treatment infrastructure and receiving rivers. The uncertainty in current water quality modelling is, however, huge, and environmental impact assessment looses more and more credibility. Based on an integrated modelling case for a combined sewer – WWTP – river system, it is shown in the paper that the integrated model does not produce more accurate results in comparison with the random simulation of emission concentrations from a frequency distribution. This should, however, not pose a serious problem as in most applications of impact assessment, model results are not needed in real time but in statistical terms. Further investigation makes clear that detail/sophistication in water quality modelling is not so important, but that more focus has to be given to long-term simulations, the use of parsimonious models and model validation based on concentration frequencies.

Environmental Impact Assessment of Anthropogenic Activities and Conceptual Restoration Strategy for Kham River in Aurangabad, India.

2020 ◽  
Vol 15 (3) ◽  
pp. 663-682
Author(s):  
Vedant Ramchandra Karhade ◽  
Amol Laxman Kamble ◽  
Shraddha Balwant Vangujare ◽  
Prasanna Santosh Wadgaonkar ◽  
Ganesh Sonaji Gadekar ◽  
...  
Keyword(s):  
Water Quality ◽  
Environmental Impact ◽  
Impact Assessment ◽  
River Basin ◽  
Environmental Impact Assessment ◽  
Evaluation System ◽  
Anthropogenic Activities ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Environmental Evaluation

In present study, the environmental impact assessment of the anthropogenic activities on the Kham River is carried out. 8Km stretch of the Kham River from downstream of Harsul Lake to the upstream of Chavani Bridge in the Aurangabad city has been selected as the study area for the assessment with regards to water quality, flooding risk, ecological and aesthetical aspects using Battelle environmental evaluation system. For the water quality monitoring eight sampling stations along the length of the river were selected and samples were taken in each season for laboratory analysis of Dissolved oxygen, Biochemical oxygen demand, pH, Total dissolved solids and total suspended solids. The results of the water quality analysis shows that the water quality in the upstream stretch of 3kms upto Himayat Baug is considerably good in comparison to the remaining 5kms stretch from Himayat Baug to Chavani Bridge. The cross sectional survey of the river basin is carried out to measure the extent of the enchorachment along the basin. The results of the cross sectional survey shows that the river basin has mean width of 36.16 meters. The ecological assessment was carried out along the vicinity of the river basin and the species of flora, birds and fishes were listed. The result of the ecological survey shows that the river has variety of species of flora and birds and fishes are found in the upstream reach of the river. The survey of recreational and historically important monuments along the basin was carried out and those places were listed for study of aesthetical aspects. The results of aesthetical survey shows that there are many places of that importance along the vicinity of the basin namely Harsul Lake, Himayat Baug, Bibi-ka-Maqbara, Panchakki, Makai Gate, Barapulla Gate, Mehmood Gate and Siddarth garden. The Battelle environmental evaluation system result shows a negative impact of – 375 units and the conceptual strategies for the restoration of Kham River are also recommended.

Water quality models: Typologies for environmental impact assessment

1996 ◽  
Vol 34 (12) ◽  
pp. 109-117 ◽  
Author(s):  
Olli Varis
Keyword(s):  
Water Quality ◽  
Environmental Impact ◽  
Impact Assessment ◽  
Environmental Impact Assessment ◽  
Water Quality Modelling ◽  
Quality Models ◽  
Institutional Settings ◽  
Project Cycle ◽  
Water Quality Models ◽  
Selection Of

Much of the practical use of water quality models is related to Environmental Impact Assessment (EIA). There is a boom of released EIA guidelines from various institutions, typically with little reference to specific methodologies. This paper presents a discussion on the applicability of various water quality modelling approaches for use in different phases of an EIA protocol. The criteria used include the project cycle process, decision types, scales of impact and paradigms and cognitive styles of problem solving. Illustration is given with a selection of approaches used in a range of natural, socio-economic and institutional settings.

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