Abstract
The Dendeng River is vital for economic sustainability and viability for the community, industry and commerce around the flood plain of the river as well as raw water sources of the Kupang PDAM. However, increased domestic and industrial waste disposal along the river has caused severe pollution. One way to maintain the quality of the river is by continuously monitoring the pollutants and applying technology control as well as controlling strategy. The aim of the research mainly is to establish the water quality status of Dendeng River by water pollution Index method based on parameter physics and chemistry, i.e. pH, DO, COD, BOD, TSS, TDS, NH3-N, NO2-N, NO3-N, and PO4-P. The research was carried out based on field survey and sample examined in situ and in laboratory. The removal of water sample from Dendeng River conducted based on composite sampling as many as six point locations of Dendeng River as representative of upstream up to downstream zone. The quality status of Dendeng River is in good condition to lightly polluted with a pollution index value of 0.6 to 1.52. Value of the DO, BOD, COD, and phosphate content were higher than the allowable class 1 standard. The Water Quality Index value of Dendeng River was 86.67, which is included in the good water quality class.
Highlights
Water is one of the natural resources which has a very important function for human life and livelihood, as well as for advancing the general welfare, so it is basic capital and main factor of development
Degree of acidity is an important parameter in monitoring water quality and determining the value of water use for household, irrigation, aquatic organisms and other interests. pH value shows the level of acidity or strength of acids and bases in water. pH value affects solubility and form of chemical compounds in water bodies
The results showed that pH value of Dendeng River water luctuates from the upstream, middle and downstream zones, but is still in normal water pH range, namely pH 6 to 9
Summary
Water is one of the natural resources which has a very important function for human life and livelihood, as well as for advancing the general welfare, so it is basic capital and main factor of development. Indonesia has 6% of the world’s water supply or about 21% of the Asia Paci ic water supply Lingkungan and Hidup (2004), the tendency of water consumption to increase exponentially while the availability of clean water continues to decrease rapidly due to natural degradation and pollution which is estimated to be 15–35% per capita per year Lingkungan and Hidup (2008). This condition is exacerbated by the limited ability to access and predict: water availability, water quality, and water use and balance Kehutanan (2020)
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