Long-term evaluation of land use/land cover and hydrological drought patterns alteration consequences on river water quality

Farhang Rahmani () and Mohammad Hadi Fattahi ()
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Farhang Rahmani: Marvdasht Branch Islamic Azad University
Mohammad Hadi Fattahi: Marvdasht Branch Islamic Azad University

Environment, Development and Sustainability: A Multidisciplinary Approach to the Theory and Practice of Sustainable Development, 2024, vol. 26, issue 7, No 104, 19068 pages

Abstract: Abstract Land use/land cover (LULC) conversion and droughts impact river water quality. Since the river water quality is significant, it was attempted to investigate the effect of hydrological drought (HD) and LULC changes on the water quality parameters of the Helle river in Iran. All the time series (1969–2020) were analyzed using dynamic analysis applications. The results indicated that due to the alteration of LULC and HD patterns, water hardness and salinity were increased by 13.7% and 16.1%, respectively. Moreover, the water quality parameters concentration was intensified. However, the river water potential of hydrogen (pH) decreased by 0.4%. The number of random elements in the time series of the pH, bicarbonate, sulfate, magnesium, and sodium was increased noticeably, and their predictability and long-term memory were reduced. The total dissolved solids (TDS), electrical conductivity (EC), chloride, potassium, and calcium’s time series became more chaotic, and their predictability and long-term memory were improved. All the time series faced an increase in the number of noises. The alteration of HD patterns induced a reduction of correlation between HD and sulfate, sodium, magnesium, bicarbonate, pH, and TDS concentration and an augmentation of correlation between HD and chloride, calcium, potassium, and salinity concentration. The Helle river water quality deteriorated due to the alteration of HD patterns and LULC. Future studies can address the strategies to improve the water quality of the Helle river.

Keywords: Approximate entropy (ApEn); Noise variance; Lyapunov exponent; Generalized Hurst exponent; Correlation dimension; Helle river (search for similar items in EconPapers)
Date: 2024
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DOI: 10.1007/s10668-023-03302-0

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