Electronic Theses and Dissertation

ABSTRAK
Lokasi penelitian berada di Kecamatan Syamtalira Bayu Kabupaten Aceh Utara, Provinsi Aceh. Secara geografis terletak pada koordinat 5518,20" LU - 5234,10" LU dan 9793,00" BT - 971147,10" BT. Lokasi penelitian terdiri dari beberapa formasi yaitu Formasi Julurayeu (QTjr) selanjutnya Formasi Idi (Qpi) yang terakhir terdapat Formasi (Qh) yang satuan litologinya endapan pasir dan fluviatil. Metode yang digunakan yaitu pemetaan geologi dan analisis kualitas air tanah dengan mengamati muka airtanah (MAT) pengujian sifat fisik pada sampel airtanah. Hasil analisis sifat fisik airtanah berupa warna, bau, dan suhu, tingkat keasaman (pH), zat terlarut (TDS), daya hantar listrik (DHL), dan sifat kimia berupa kandungan ion yang di analisis berdasarkan hasil uji laboratorium. Hasil yang diperoleh dari penelitian yaitu daerah kondisi geologi daerah penelitian dizonasikan menjadi 5 satuan yaitu satuan batupasir julurayeu (QTjr), Satuan Batupasir idi (Qpi), Satuan Konglomerat idi (Qpi), Endapan Pasir lanauuan idi (Qpi) dan Endapan Alluvium (Qh), kondisi geomorfologi daerah penelitian yaitu menghasilkan 2 unit satuan bentang alam denudasional yaiu unit D1 perbukitan dan erosi kecil dan unit D5 Dataran. Hasil analisis dari kualitas air tanah yaitu menghasilkan nilai ketinggian muka air tanah dengan kedalaman 5 meter, dan air tanah tertinggi dengan kedalaman 63,9 meter, untuk analisis sifat fisiki air tanah memiliki nilai suhu yang berkisar 2727⁰C hingga 30⁰C, dan nilai pH (Potential Hydrogen) asam dan normal, nila Total dissolved solids memiliki nilai dari bagus hingga sangat bagus, dan Daya Hantar listrik (DHL) memiliki nilai yang tidak melewati batas standar baku mutu. Selanjutnya Berdasarkan hasil pengujian sifat kimia air tanah melakukan pengujian terhadap beberapa senyawa kimia yang menghasilkan hasil uji berupa Sulfat (SO₄²⁻) dengan rentang nilai 24 mg/l hingga 64 mg/l, Karbonat (CO₃²⁻) 39 mg/l hingga 331, 2 mg/l, Kalsium (Ca²⁺) 15 mg/l hingga 64 mg/l, Bikarbonat (HCO3−) 43 mg/l hingga 341,6 mg/L, Magnesium (Mg2+) 1,9 hingga 10,7 mg/l, Kalium (K+) 3,6 mg/l hingga 7 mg/l, Klorida (Cl−) 15 mg/l hingga 19 mg/l dan nilai Natrium (Na+) 29 hingga 30 mg/l, Berdasarkan hasil nilai uji kualitas air tanah, Bedasarkan hasil uji kualitas air tanah berupa sifat fisik dan kimia, maka nilai tersebut menunjukkan bahwa kualitas air tanahdi lokasi penelitian masih dalam kategori aman. Hal ini dikarenakan berada di bawah standar baku mutu yang telah di tetapkan.
Kata Kunci : Pemetaan Geologi, Kualitas Air Tanah, Sifat Fisik Air, Sifat Kimia Air

ABSTRACT The research location is in Syamtalira Bayu District, North Aceh Regency, Aceh Province. Geographically located at coordinates 5°5¢18.20‘ N - 5°2¢34.10’ N and 97°9¢3.00‘ E - 97°11¢47.10’ East. The research location consists of several formations, namely the Julurayeu Formation (QTjr), then the Idi Formation (Qpi), the last of which is the Formation (Qh) whose lithological unit is sand and fluviatile deposits. The methods used are geological mapping and groundwater quality analysis by observing the groundwater level (MAT) testing the physical properties of groundwater samples. The results of the analysis of physical properties of groundwater in the form of colour, odour, and temperature, acidity (pH), solute (TDS), electrical conductivity (DHL), and chemical properties in the form of ion content analyzed based on laboratory test results. The results obtained from the research are the geological conditions of the research area zoned into 5 units, namely the julurayeu sandstone unit (QTjr), idi sandstone unit (Qpi), idi conglomerate unit (Qpi), idi silt sand deposits (Qpi) and Alluvium deposits (Qh), the geomorphological conditions of the research area which produce 2 units of denudational landscape units namely unit D1 hills and small erosion and unit D5 plains. The results of the analysis of groundwater quality are to produce the value of the height of the groundwater table with a depth of 5 metres, and the highest groundwater with a depth of 63.9 metres, for the analysis of the physical properties of groundwater has a temperature value that ranges from 2727⁰C to 30⁰C, and the pH (Potential Hydrogen) value is acidic and normal, the value of total dissolved solids has a value from good to very good, and the electrical conductivity (DHL) has a value that does not exceed the limit of quality standard. Furthermore, based on the results of testing the chemical properties of groundwater, testing several chemical compounds produced test results in the form of Sulfate (SO₄²-) with a value range of 24 mg/l to 64 mg/l, Carbonate (CO₃²-) 39 mg/l to 331, 2 mg/l, Calcium (Ca²⁺) 15 mg/l to 64 mg/l, Bicarbonate (HCO3-) 43 mg/l to 341.6 mg/L, Magnesium (Mg2+) 1, 9 to 10.7 mg/l, Potassium (K+) 3.6 mg/l to 7 mg/l, Chloride (Cl-) 15 mg/l to 19 mg/l and Sodium (Na+) value 29 to 30 mg/l, Based on the results of groundwater quality test values, Based on the results of groundwater quality tests in the form of physical and chemical properties, these values indicate that the quality of groundwater at the research site is still in the safe category. This is because it is below the quality standards that have been set. Keywords: Geological Mapping, Groundwater Quality, Physical Properties of Water, Chemical Properties of Water