Mechanisms affecting streamflow and stream water quality: An approach via stable isotope, hydrogeochemical and time-series analysis

1990 ◽  
Vol 26 (12) ◽  
pp. 3005-3019 ◽  
Author(s):  
Jeffrey Turner
Keyword(s):  
Water Quality ◽  
Time Series ◽  
Stable Isotope ◽  
Time Series Analysis ◽  
Stream Water ◽  
Stream Water Quality ◽  
Series Analysis

Analysis of Surface Water Quality in Tehran

2002 ◽  
Vol 37 (2) ◽  
pp. 489-511 ◽  
Author(s):  
Golamreza Asadollah-Fardi
Keyword(s):  
Water Quality ◽  
Time Series ◽  
Surface Water ◽  
Time Series Analysis ◽  
Surface Water Quality ◽  
Exponential Smoothing ◽  
Future Design ◽  
Series Analysis

Abstract Box-Jenkins and exponential smoothing time series analysis of the monthly water quality in surface water in Tehran was conducted as a case study. Various univariate models were developed for each determinand. Most of the models were seasonal, indicating that the water quality determinands vary throughout the year. The models follow the same pattern of variations present in the data. This study shows the credibility of the models, therefore the models may be used for future design purposes.

scholarly journals Assessing environmental impacts on stream water quality: the use of cumulative flux and cumulative flux difference approaches to deforestation of the Hafren Forest, mid-Wales

2002 ◽  
Vol 6 (3) ◽  
pp. 421-432 ◽  
Author(s):  
C. Neal
Keyword(s):  
Water Quality ◽  
Time Series ◽  
Stream Water ◽  
Quality Data ◽  
Stream Water Quality ◽  
Water Quality Data ◽  
Paired Catchment ◽  
Flux Difference ◽  
Clear Fell ◽  
Acid Neutralisation

Abstract. A method for examining the impacts of disturbance on stream water quality based on paired catchment "control" and "response" water quality time series is described in relation to diagrams of cumulative flux and cumulative flux difference. The paper describes the equations used and illustrates the patterns expected for idealised flux changes followed by an application to stream water quality data for a spruce forested catchment, the Hore, subjected to clear fell. The water quality determinands examined are sodium, chloride, nitrate, calcium and acid neutralisation capacity. The anticipated effects of felling are shown in relation to reduction in mist capture and nitrate release with felling as well as to the influence of weathering and cation exchange mechanisms, but in a much clearer way than observed previously using other approaches. Keywords: Plynlimon, stream, Hore, acid neutralisation capacity, calcium, chloride, nitrate, sodium, cumulative flux, flux

Potability analysis of raw water from Bospoort dam, South Africa

2016 ◽  
Vol 11 (3) ◽  
pp. 634-643
Author(s):  
S. Nyende-Byakika ◽  
J. M. Ndambuki ◽  
M. S. Onyango ◽  
L. Morake
Keyword(s):  
South Africa ◽  
Water Quality ◽  
Time Series ◽  
Time Series Analysis ◽  
Raw Water ◽  
Threshold Levels ◽  
Series Analysis ◽  
Raw Water Quality

This paper discusses raw water quality results for the raw water from Bospoort dam in South Africa. A time series analysis was conducted for various parameters over a prolonged period of time. It was revealed that apart from conductivity, hardness, and high coliform counts, most parameters were below their recommended threshold levels for the greatest part of the study period.

Sign in / Sign up

Export Citation Format

Share Document