EVALUASI DAN REKAYASA KERENTANAN AIR TANAH DI SEKITAR PLTP LAHENDONG KELURAHAN TONDANGOW, KECAMATAN TOMOHON SELATAN, KOTA TOMOHON, PROVINSI SULAWESI UTARA

Mandang, Glorya Mega (2024) EVALUASI DAN REKAYASA KERENTANAN AIR TANAH DI SEKITAR PLTP LAHENDONG KELURAHAN TONDANGOW, KECAMATAN TOMOHON SELATAN, KOTA TOMOHON, PROVINSI SULAWESI UTARA. Other thesis, UPN Veteran Yogyajarta.

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Abstract

xii
EVALUASI DAN REKAYASA KERENTANAN AIR TANAH DI SEKITAR
PLTP LAHENDONG KELURAHAN TONDANGOW, KECAMATAN
TOMOHON SELATAN, KOTA TOMOHON, PROVINSI SULAWESI
UTARA
Oleh
Glorya Mega Mandang
114180004
INTISARI
Indonesia memiliki potensi panas bumi kedua terbesar di dunia dan Sulawesi
Utara menjadi salah satu daerah di Indonesia yang memiliki potensi panas bumi
tersebut. Potensi panas bumi yang ada di Sulawesi Utara dimanfaatkan secara langsung
sebagai Pembangkit Listrik Panas Bumi (PLTP) Lahendong yang terletak di
Kelurahan Tondangow, Kecamatan Tomohon Selatan, Kota Tomohon, Provinsi
Sulawesi Utara. Kegiatan pada pengeboran sumur produksi dan kolam pendingin air
panas bumi di PLTP Lahendong memiliki potensi pencemaran air tanah yang dapat
diakibatkan dari aktivitas geologi maupun human error. Oleh karena itu, penelitian ini
dilakukan dengan tujuan untuk mengetahui kualitas dan status mutu air tanah di daerah
penelitian, mengetahui tingkat kerentanan air tanah terhadap pencemaran di daerah
penelitian, dan menentukan arahan pengelolaan air tanah di daerah penelitian.
Penelitian ini dilakukan dengan menggunakan metode kombinasi yang mencakup
pengumpulan data, populasi dan sampling, analisis dan evaluasi deskriptif. Metode
pengumpulan data meliputi survei dan uji laboratorium. Pengambilan sampel air tanah
dilakukan dengan metode purposive sampling mengikuti SNI 6989.58-2008 mengenai
Metode Pengambilan Contoh Airtanah. Analisis status mutu air tanah dilakukan
menggunakan metode Indeks Pencemaran dan analisis tingkat kerentanan air tanah
dilakukan dengan menggunakan metode DRASTIC. Arahan pengelolaan dilakukan
melalui tiga pendekatan yaitu pendekatan teknologi, pendekatan sosial, dan
pendekatan regulasi.
Hasil penelitian menunjukan kualitas air tanah pada tiga titik sumur di daerah
penelitian masih memenuhi baku mutu kecuali parameter pH dengan nilai pada LP23
sebesar 5,78; LP42 sebesar 5,63; dan LP55 sebesar 5,73. Daerah penelitian memiliki
status mutu air tanah yang termasuk kategori tercemar ringan dan tingkat kerentanan
air tanah terbagi menjadi 2 kriteria tingkat kerentanan yaitu tidak rentan dengan skor
92-98 dan tingkat kerentanan rendah dengan skor 93-112. Arahan pengolahan air tanah
untuk meningkatkan pH dapat dilakukan dengan filtrasi menggunakan media filter
berupa pasir, karbon aktif, dan zeolit. Pengolahan air tanah di daerah penelitian
membutuhkan kerjasama masyarakat dan pemerintah agar dapat berjalan dengan
maksimal.
Kata Kunci: Panas Bumi, Air Tanah, PLTP, Kualitas Air, Status Mutu
Air,Kerentanan, Filtrasi
xiii
EVALUATION AND ENGINEERING OF GROUNDWATER
VULNERABILITY AROUND LAHENDONG GEOTHERMAL POWER
PLANT (PLTP), TONDANGOW SUBDISTRICT, TOMOHON DISTRICT,
TOMOHON CITY, NORTH SULAWESI PROVINCE
By
Glorya Mega Mandang
114180004
ABSTRACT
Indonesia has the second largest geothermal potential in the world and North
Sulawesi is one of the regions in Indonesia that has geothermal potential. The
geothermal potential in North Sulawesi is utilized directly as the Lahendong
Geothermal Power Plant (PLTP) located in Tondangow Subdistrict, South Tomohon
District, Tomohon City, North Sulawesi Province. The drilling activities of production
wells and geothermal water cooling ponds at PLTP Lahendong have the potential for
groundwater pollution that can result from geological activities and human error.
Therefore, this research was conducted with the aim to determine the quality and
status of groundwater quality in the research area, determine the level of groundwater
vulnerability to pollution in the research area, and determine the direction of
groundwater management in the research area.
This research was conducted using a combination method that includes data
collection, population and sampling, analysis and descriptive evaluation. Data
collection methods included surveys and laboratory tests. Groundwater sampling was
collected using purposive sampling method according to SNI 6989.58-2008 on
Groundwater Sampling Method. Groundwater quality status analysis was conducted
using the Pollution Index method and groundwater vulnerability level analysis was
conducted using the DRASTIC method. Management direction is carried out through
three approaches, namely technological approach, social approach, and regulatory
approach.
The results obtained showed that the groundwater quality at three well points in
the research area still reached the quality standard except for the pH parameter with
a value at LP23 of 5.78; LP42 of 5.63; and LP55 of 5.73. The research area has a
groundwater quality status that is categorized as lightly polluted and the level of
groundwater vulnerability is divided into 2 vulnerability level criteria, which are not
vulnerable with a score of 92-98 and a low level of vulnerability with a score of 93-
112. Groundwater treatment directions to increase pH can be done by filtration using
filter media in the form of sand, activated carbon, and zeolit. Groundwater treatment
in the research area requires community and government collaboration in order to
run optimally.
Keywords: Geothermal, Groundwater, PLTP, Water Quality, Water Quality
Status,Vulnerability, Filtration

Item Type: Thesis (Other)
Uncontrolled Keywords: Geothermal, Groundwater, PLTP, Water Quality, Water Quality Status,Vulnerability, Filtration
Subjects: T Technology > T Technology (General)
Divisions: Faculty of Engineering, Science and Mathematics > School of Engineering Sciences
Depositing User: Eko Yuli
Date Deposited: 30 Jan 2024 04:00
Last Modified: 30 Jan 2024 04:00
URI: http://eprints.upnyk.ac.id/id/eprint/38800

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