Statistical Assessment of Some Water Quality and Rainfall Data in Ciliwung River, Indonesia

Ciliwung is the river that flows from upstream in the Puncak area of Bogor Regency to Jakarta Bay. Water quality parameters have been monitored each month at three stations in the Ciliwung River watershed by the Indonesian Ministry of Environmental and Forestry and Meteorological, Climatological, an...

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Bibliographic Details
Published in:IOP conference series. Earth and environmental science 2022-07, Vol.1062 (1), p.12035
Main Authors: Aisyah, S, Hidayat, H, Verawati, D
Format: Article
Language:English
Subjects:
Data analysis
Datasets
Dissolved oxygen
Dissolved solids
Electrical conductivity
Electrical resistivity
Food industries wastewaters
Food industry
Graphs
Histograms
Hydrologic data
Kolmogorov-Smirnov test
Kurtosis
Livestock
Mean
Normality
Organic matter
Outliers (statistics)
Parameters
Rainfall
Rivers
Statistical methods
Statistics
Total dissolved solids
Turbidity
Wastewater
Water quality
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Summary:Ciliwung is the river that flows from upstream in the Puncak area of Bogor Regency to Jakarta Bay. Water quality parameters have been monitored each month at three stations in the Ciliwung River watershed by the Indonesian Ministry of Environmental and Forestry and Meteorological, Climatological, and Geophysical Agency. The data analyzed in this study are rainfall and water quality data for the period 2017-2020 with water quality variables including pH, temperature, Dissolved Oxygen (DO), electrical conductivity (EC), Turbidity, Total Dissolved Solids (TDS), and Nitrate-N. This paper aimed to analyze the time series data using statistical methods and describes certain chemical parameters and rainfall data, that show Ciliwung water quality during 2017-2020. Descriptive analysis was used to determine the mean, skewness, and kurtosis values based on time and location. Histogram and boxplot graphs were used to describe distribution of the data set. Test of Kolmogorov-Smirnov was used to evaluate the normality of the data set. The descriptive analysis resulted in the mean of each water quality parameter showing a value that did not show a significant difference between observation locations except for the TDS parameter. From the histogram and boxplot graphs, it can be seen that the data shows an abnormal distribution and there are many outliers. Kolmogorov-Smirnov test resulted in better normality of data distribution. The main problem of pollution is the use of oxygen by organic matter contained in river water. Ciliwung River downstream was changed into open accumulator wastewater from the food industry, livestock, and settlements.
ISSN:1755-1307
1755-1315
DOI:10.1088/1755-1315/1062/1/012035