ELECTRICAL RESISTIVITY AND HYDROGEOCHEMICAL EVALUATION OF SEPTIC-TANKS EFFLUENT MIGRATION TO GROUNDWATER
Journal Title: Malaysian Journal of Geosciences - Year 2018, Vol 2, Issue 2
Abstract
Water quality degradation through different kinds of pollutants is a major concern globally. Hence, this study becomes imperative in order to determine the effects of groundwater pollution due to septic tank effluent. Integrated electrical resistivity imaging, physicochemical and microbiological analyses of water samples from ten hand-dug wells (HdW) and three boreholes (BH) were carried out around residential areas surrounded by septic tank systems using standard field and laboratory procedures. Results of the 2-D resistivity imaging of the subsurface along nine traverses around the study area using Wenner configuration with constant electrode separation ranging from 2 to 12 m showed anomalously low resistivity zones, less than 20 Ωm suspected to be septic plume accumulation. The accumulation was more pronounced in the northern and southern part of the study area to a depth of about 10 m. The direction of groundwater flow suggests that the water in the wells is flowing towards the direction of the septic plume. Physicochemical analyses showed the groundwater samples to be within the specified limits of WHO/NSDWQ for drinking purpose. However, higher values of concentrations of most analyzed parameters were noticed in HdW 6 and HdW 7 due to their nearness to septic tank system. The microbiological analysis indicates excessive amount of microbes in the samples, an indication of groundwater contamination by effluent from the septic tanks. The study recommends treatment and regular monitoring of groundwater sources, adequate distance from water sources to septic systems and adoption of clean technology to prevent contamination of groundwater flow.
Authors and Affiliations
Ademila Omowumi
Keywords
Related Articles
- EP ID EP402482
- DOI 10.26480/mjg.02.2018.01.10
- Views 97
- Downloads 0
PAHANG FLOOD DISASTER : THE POTENTIAL FLOOD DRIVERS
The northeast monsoon which occurs from November to March carries heavy rainfall which always result in flood especially to the east coast of Peninsular Malaysia. Pahang was one of the state that severely affected by thi...
STAKEHOLDERS’ RESPONSE AND PERSPECTIVES ON FLOOD DISASTER OF PAHANG RIVER BASIN
The Pahang river basin is the largest river basin in the Pahang State, with total catchment area covering 29300km2. Floods of Pahang river basin have become an annual natural disaster event where all the stakeholders hav...
ASSESSING SUSPENDED SEDIMENT YIELD IN THE SAF SAF GAUGED CATCHMENT, NORTHEASTERN ALGERIA
Many studies on sediment transport have been carried out on Algerian rivers but few studies have been undertaken in catchments of the Northeast of Algeria. The scarcity or discontinuity on sediment transport measurements...
TIME SERIES ANALYSIS OF SUBSIDENCE IN DHAKA CITY, BANGLADESH USING INSAR
Despite existing literature suggesting that Dhaka City, Bangladesh is undergoing subsidence, few researches have been carried out to actually measure the subsidence rate. Previously conducted studies either do not provid...
THE CRUST AND UPPERMOST MANTLE S-WAVE VELOCITY STRUCTURE BENEATH JAPAN ISLANDS REVEALED BY JOINT ANALYSIS OF P- AND S-WAVE RECEIVER FUNCTIONS
We have studied the crust and uppermost mantle S-wave velocity structure beneath Japan Islands by using the teleseismic waveform data above Mw 6.0 recorded from January 2006 to February 2017 by 15 Hi-Net stations and the...