Abstract
The research has been conducted to analyze the distribution of underground water physical parameters of the housing around Asahan Indah palm oil factory area Rokan Hulu District with radial method within ±300 meters radius from the factory location. The levels of underground water physical parameters include conductivity, resistivity, and salinity measured based on coordinate points amounted of 50 points. The data obtained from the measurement results were then inputted into “surfer 11” software to be processed in order to obtain the contour map of underground water physical parameters level. The results of this research indicated that the highest conductivity level came from the ring well type with 5 meter depth; it was 0.0964 (1/ohm·m) exceeded the standard threshold of underground water quality standard and the lowest conductivity was 0.00342 (1/ohm·m) which came from a ring well type with 10 meter depth. The lowest resistivity level was 10.37 ohm·m which came from the ring well type with 5 meter depth and the highest was 292.4 ohm·m which came from the ring well with 10 meter depth. The highest salinity level was 448 mg/l which exceeded the baseline threshold of underground water quality which came from the ring well type with 5 meter depth and the lowest was 175 mg/l from the ring well with 10 meter depth. The results of this research found that underground water in wells with 5 meters depth has been polluted with palm oil waste and at the depth of 10 meters, it has not been contaminated.
Highlights
The need of clean water sourced from underground water in certain areas increases from year to year along with population growth and development activities [1]
The results of this research indicated that the highest conductivity level came from the ring well type with 5 meter depth; it was 0.0964 (1/ohm∙m) exceeded the standard threshold of underground water quality standard and the lowest conductivity was 0.00342 (1/ohm∙m) which came from a ring well type with 10 meter depth
The highest salinity level was 448 mg/l which exceeded the baseline threshold of underground water quality which came from the ring well type with 5 meter depth and the lowest was 175 mg/l from the ring well with 10 meter depth
Summary
The need of clean water sourced from underground water in certain areas increases from year to year along with population growth and development activities [1]. In order to serve the needs of clean water sourced from underground water, it is needed to understand the potential of groundwater both in quantity and quality [2]. Human activity on the utilization of natural resources in this case is the palm oil processing industry can cause soil contamination. The pollution of underground environment caused by palm oil waste is one of the problems faced by developing countries like Indonesia [4]. This pollution will affect the underground water itself. The small porosity and permeability factor in the lithology of the research area causes difficulties for the waste to permeate [5]
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