Estimation of depth to fresh–salt water interface and its implications for sustainable groundwater resource management: a case study of the Coastal strip of Dar es Salaam, Tanzania

Mtoni, Yohana Enock; Mjemah, Ibrahimu Chikira; Martens, Kristine; Bakundukize, Charles; Mtoni, Paul E; Walraevens, Kristine

doi:10.1007/s12665-014-3887-0

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…dengan hf adalah elevasi muka air tawar di atas muka air asin, z adalah kedalaman interface dari muka air asin, s adalah densitas air asin (1,025 g/cm 3 ) dan f adalah densitas air tawar (1 g/cm 3 ). Dengan mensubtusikan nilai densitas air tawar dan air asin ke dalam persamaan (1), maka diperoleh hubungan perbandingan seperti:…”

Section: Latar Belakangunclassified

“…Hubungan air tawar (fresh water) dengan air asin (saline water) [2] Ketersediaan air tawar di kawasan pesisir mengakibatkan terjadinya eksplotasi air tawar yang berlebihan. Akibatnya terjadi intrusi air asin di wilayah pesisir [3][4][5][6][7]. Intrusi air asin akibat eksploitasi air tawar di wilayah pesisir untuk pulau kecil lebih rentan lagi dibandingkan pulau besar [8].…”

Section: Latar Belakangunclassified

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Penentuan Kedalaman Interface pada Bentuklahan Lereng Gunungapi Bawah dan Bentuklahan Dataran Aluvial Kepesisiran di Pulau Ternate

Salam¹,

Sunarto²,

Santosa³

2018

Positron

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Telah dilakukan pengukuran interface menggunakan metode geolistrik 2D di wilayah pesisir Pulau Ternate. Penelitian ini dimaksudkan untuk menentukan keadaan interface dengan mengajukan asumsi sederhana yang berdasar pada prinsip trigonometri dasar. Pengukuran dilakukan di bagian barat sampai barat daya pada bentuklahan lereng gunungapi bawah dan bentuklahan dataran aluvial kepesisiran. Hasil pengukuran geolistrik pada keseluruhan lintasan menunjukkan, ketebalan air tawar pada bentuklahan lereng gunungapi bawah berkisar 7 - 13 m dengan nilai resistivitas antara 25,9 – 100 Ωm. Ketebalan air tawar pada bentuklahan dataran aluvial kepesisiran antara 15 m hingga kurang dari 20 m dengan nilai resistivitas antara 30 – 109 Ωm. Kedalaman interface pada bentuklahan lereng gunungapi bawah sekitar 13 m dari permukaan dengan kemiringan 77o, sedang kedalaman interface pada bentuklahan dataran aluvial kepesisiran sekitar 20 m dari permukaan dengan kemiringan 81o. Hasil pengukuran menunjukkan bahwa ketebalan air tawar di daerah pesisir bagian barat sampai baratdaya pada bentuklahan lereng gunungapi bawah lebih tipis dibandingkan dengan daerah pesisir bagian timur hingga tenggara pada bentuklahan dataran aluvial kepesisiran.

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Section: Latar Belakangunclassified

Penentuan Kedalaman Interface pada Bentuklahan Lereng Gunungapi Bawah dan Bentuklahan Dataran Aluvial Kepesisiran di Pulau Ternate

Salam¹,

Sunarto²,

Santosa³

2018

Positron

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“…A significant number of studies have been conducted on this topic owing to the importance of the domestic water supply. For instance, studies focused on the anthropogenic activities resulting in groundwater pollution of nitrate/heavy metals [15][16][17][18][19][20][21]; groundwater geochemical assessment using geostatistical and geographic information system approaches [22][23][24]; and groundwater salinization related to pumping and irrigation [25,26]. However, the regions with highly developed river net (such as the South China) generally consider the surface  water (the rivers and the reservoirs) as the domestic water supply source; thus, the prevention of surface water pollution in such regions is emphasized, while the attention paid to the groundwater is not enough [27,28].…”

Section: Introductionmentioning

confidence: 99%

Natural and human-induced factors controlling the phreatic groundwater geochemistry of the Longgang River basin, South China

Chen

Lin-shen³

et al. 2020

Open Geosciences

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AbstractGroundwater chemical evolution is the key to ensuring the sustainability of local society and economy development. In this study, four river sections and 59 groundwater wells are investigated in the Longgang River (L.R.) basin in South China. Comprehensive hydrochemical analysis methods are adopted to determine the dominant factors controlling the chemical evolution of the local phreatic groundwater and the potential impact of human activities on groundwater quality. The results indicate that the ionic composition of the local phreatic groundwater is dominated by Ca2+ (0.9–144.0 mg/L), HCO3− (4.4–280.0 mg/L), and SO42− (1.0–199.0 mg/L). Ca–Mg–HCO3, Ca–Na–HCO3, and Na–Ca–HCO3 are the major groundwater hydrochemical facies. Water–rock interactions, such as the dissolution of calcite and dolomite, are the primary source of the major ions in the local groundwater. Cation-exchange reaction has its effects on the contents of Ca2+, Mg2+, and Na+. Ammonia concentration of the sampling sections in the L.R. increases from 0.03 to 2.01 mg/L along the flow direction. Groundwater nitrate in the regions of the farmland is attributed to the lowest level of the groundwater quality standards of China, while the same test results are obtained for heavy metals in the industrial park and landfill, suggesting a negative impact of the anthropogenic activities on the local phreatic groundwater quality.

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Causes of groundwater salinization in the plain area of Kashgar River Basin in Xinjiang, China

Zeng

Zhou

et al. 2021

Environ Earth Sci

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Estimation of depth to fresh–salt water interface and its implications for sustainable groundwater resource management: a case study of the Coastal strip of Dar es Salaam, Tanzania

Cited by 7 publications

References 21 publications

Penentuan Kedalaman Interface pada Bentuklahan Lereng Gunungapi Bawah dan Bentuklahan Dataran Aluvial Kepesisiran di Pulau Ternate

Penentuan Kedalaman Interface pada Bentuklahan Lereng Gunungapi Bawah dan Bentuklahan Dataran Aluvial Kepesisiran di Pulau Ternate

Natural and human-induced factors controlling the phreatic groundwater geochemistry of the Longgang River basin, South China

Causes of groundwater salinization in the plain area of Kashgar River Basin in Xinjiang, China

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