Detecting and predicting the impact of land use changes on groundwater quality, a case study in Northern Kelantan, Malaysia

The Science of the Total Environment
Tahoora Sheikhy NaranySaskia Keesstra

Abstract

The conversions of forests and grass land to urban and farmland has exerted significant changes on terrestrial ecosystems. However, quantifying how these changes can affect the quality of water resources is still a challenge for hydrologists. Nitrate concentrations can be applied as an indicator to trace the link between land use changes and groundwater quality due to their solubility and easy transport from their source to the groundwater. In this study, 25year records (from 1989 to 2014) of nitrate concentrations are applied to show the impact of land use changes on the quality of groundwater in Northern Kelantan, Malaysia, where large scale deforestation in recent decades has occurred. The results from the integration of time series analysis and geospatial modelling revealed that nitrate (NO3-N) concentrations significantly increased with approximately 8.1% and 3.89% annually in agricultural and residential wells, respectively, over 25years. In 1989 only 1% of the total area had a nitrate value greater than 10mg/L; and this value increased sharply to 48% by 2014. The significant increase in nitrate was only observed in a shallow aquifer with a 3.74% annual nitrate increase. Based on the result of the Autoregressive Integrate...Continue Reading

Citations

Oct 8, 2020·Environmental Monitoring and Assessment·Mohammad Sakizadeh, Lloyd H C Chua
May 5, 2020·Journal of Environmental Management·Hafiz Mohkum HammadArtemi Cerdà
Feb 28, 2021·Environmental Science and Pollution Research International·Xuan WangZhenliang Liao
Mar 14, 2021·Water Environment Research : a Research Publication of the Water Environment Federation·Riki Sarma, Santosh Kumar Singh
Apr 29, 2021·Environmental Science and Pollution Research International·Shengwei CaoYasong Li

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