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All Journal Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal)
Harnani Harnani
Universitas Sriwijaya
Agriculture, Biological Sciences & Forestry Chemistry Education Physics

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Analisis Hubungan Kadar Air terhadap Kuat Tekan Bebas Tanah di Daerah Danau Rayo, Kabupaten Musi Rawas Utara, Sumatera Selatan Salsabila Az Zahra; Harnani Harnani
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 4 (2025): November
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v6i4.1482

Abstract

Daerah penelitian terletak di Danau Rayo yang memiliki tujuan untuk dapat mengetahui bagaimana kadar air berpengaruh terhadap nilai kuat tekan bebas (Qu). Pengujian dilakukan terhadap tujuh sampel tanah yang diambil secara undisturbed menggunakan bor tangan di lokasi penelitian. Setiap sampel diuji untuk menentukan kadar air alami dan nilai kuat tekan bebasnya di laboratorium. Data hasil pengujian kemudian dianalisis menggunakan regresi linier sederhana untuk melihat hubungan antara kadar air dan kuat tekan bebas. Hasil analisis menunjukkan persamaan regresi y=-0,8694x + 63,944 dengan nilai koefisien determinasi R2=0,3642, yang mengindikasikan bahwa kadar air berpengaruh sebesar 36,42% terhadap variasi kuat tekan bebas tanah. Nilai koefisien regresi negatif mengindikasikan bahwa tiap kenaikan persentase kadar air, nilai kuat tekan bebas cenderung mengalami penurunan. Hal tersebut dipengaruhi oleh meningkatnya kandungan air dalam pori-pori tanah yang mengurangi gaya kohesi antar partikel. Secara keseluruhan, hasil penelitian ini menunjukkan bahwa kadar air merupakan faktor kunci yang berperan penting dalam menentukan kekuatan tanah. Perubahan kadar air dapat secara signifikan memengaruhi perilaku mekanik tanah, khususnya terhadap nilai kuat tekan bebas (Qu). Oleh karena itu, pengendalian dan pemantauan kadar air perlu diperhatikan dalam analisis kestabilan tanah serta dalam perencanaan dan pelaksanaan konstruksi, guna memastikan keamanan dan kestabilan struktur yang dibangun di atasnya.
Penilaian Kelayakan Air Sebagai Sumber Air Bersih dan Air Minum Berdasarkan Water Quality Index (WQI) Titra Hayyu Al Ghaitsi; Harnani Harnani
Jurnal Pendidikan, Sains, Geologi, dan Geofisika (GeoScienceEd Journal) Vol. 6 No. 4 (2025): November
Publisher : Mataram University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/goescienceed.v6i4.1484

Abstract

Water is an important resource for human life and activities. The decline in water quality due to domestic activities, agriculture, and the existence of landfills has become an environmental problem that need serious attention. This study aims to assess water quality in Palemraya Village, Ogan ilir Regency, using the Water Quality Index (WQI) method with a Weighted Arithmetic Index approach. Samples were taken at four points representing surface water and groundwater sources. Physical, chemical, and biological parameters were tested in the laboratory in accordance with Permenkes No. 2 of 2023 standards. The results showed that the WQI values ranged from 8,96 to 83,11. Location S1, which is close to the landfill, had very poor water quality, while location P2 showed good water quality that could still be used after simple treatment. The main factors causing the decline in water quality were low pH and microbiological contamination due to domestic activities and leachate seepage. This study is expected to serve as a basis for efforts to manage sustainable clean water sources for the local community
Co-Authors Salsabila Az Zahra Titra Hayyu Al Ghaitsi