Analisis karakteristik Akuifer dan Air Tanah kabupaten Probolinggo

Rivalda, Elza Amarul (2024) Analisis karakteristik Akuifer dan Air Tanah kabupaten Probolinggo. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Kabupaten Probolinggo memiliki air tanah yang melimpah, terbukti dengan banyaknya mata air dan sumur artesis di berbagai lokasi. Penelitian ini bertujuan untuk menentukan karakteristik akuifer yaitu berupa ketebalan, kedalaman akuifer, dan volume akuifer. Selain itu dilakukan analisis karakteristik air tanah yaitu volume cadangan air tanah, daerah imbuhan air tanah dan fasies air tanah berdasarkan data hidrokimia. Data yang digunakan meliputi 66 titik VES, satu data log bor, data model elevasi digital (DEM), dan data unsur mayor. Berdasarkan pemodelan 3D dan pemetaan, ditemukan tiga lapisan yaitu akuifer bebas, akuitard, dan akuifer dalam. Akuifer bebas memiliki ketebalan dan kedalaman 1-150 m dengan volume 33.664.885.229 m³. Lapisan akuitard memiliki ketebalan 1-63 m, kedalaman 1-150 m, dan volume 8.799.570.600,8 m³. Lapisan akuifer dalam memiliki ketebalan 1-130 m, kedalaman 1,6-145 m, dan volume 44.381.908.485,8 m³. Cadangan air tanah dalam akuifer adalah sebesar 17.595.655.931,17 m³. Analisis daerah imbuhan berdaasrkan topografi menunjukkan terdapat dua zona imbuhan air tanah: imbuhan akuifer bebas seluas 875.282.424,238 m² dan imbuhan akuifer semi tertekan seluas 906.315.725,6 m². Analisis hidrokimia diagram trilinear Piper menunjukkan fasies air tanah dengan tipe magnesium bicarbonate yang aritnya air tanah didominasi oleh anion bicarbonate yang dipengarhui oleh keberadaan batuan karbonat yaitu batu gamping koral dan kation magnesium yang dipengaruhi oleh keberadaan batuan beku basalt seperti` andesit.
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Probolinggo Regency has abundant groundwater, as evidenced by the numerous springs and artesian wells in various locations. This research aims to determine the characteristics of the aquifer, including thickness, depth, and volume of the aquifer. Additionally, an analysis of groundwater characteristics such as groundwater reserve volume, groundwater recharge area, and groundwater facies based on hydrochemical data is conducted. The data used includes 66 VES points, one borehole logging data, digital elevation model (DEM) data, and major element data.Based on 3D modeling and mapping, three layers were found: the unconfined aquifer, aquitard, and confined aquifer. The unconfined aquifer has a thickness and depth of 1-150 m with a volume of 33,664,885,229 m³. The aquitard layer has a thickness of 1-63 m, depth of 1-150 m, and a volume of 8,799,570,600.8 m³. The confined aquifer layer has a thickness of 1-130 m, depth of 1.6-145 m, and a volume of 44,381,908,485.8 m³. The groundwater reserve in the aquifer is 17,595,655,931.17 m³. Analysis of the recharge area based on topography shows two groundwater recharge zones: unconfined aquifer recharge area covering 875,282,424.238 m² and semi-confined aquifer recharge area covering 906,315,725.6 m². Hydrochemical analysis using the Piper trilinear diagram shows a groundwater facies with a type of magnesium bicarbonate means that the groundwater is dominated by bicarbonate anions influenced by the presence of carbonate rocks, such as coral limestone, and magnesium cations influenced by the presence of basaltic igneous rocks like andesite.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Fasies air tanah, peresebaran akuifer, volume akuifer, cadangan air tanah; Groundwater facies, aquifer distribution, aquifer volume, groundwater reserves
Subjects:	G Geography. Anthropology. Recreation > GB Physical geography > GB1003.2 Groundwater. G Geography. Anthropology. Recreation > GB Physical geography > GB1197.7 Groundwater flow. Reservoirs
Divisions:	Faculty of Civil, Planning, and Geo Engineering (CIVPLAN) > Geophysics Engineering > 33201-(S1) Undergraduate Thesis
Depositing User:	Elza Amarul Rivalda
Date Deposited:	13 Aug 2024 03:59
Last Modified:	13 Aug 2024 03:59
URI:	http://repository.its.ac.id/id/eprint/115086

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