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Geomorfologi Tanah Pada Transisi Geologi Formasi Wonosari dan Nglanggran di Kecamatan Purwosari Gunungkidul Yogyakarta Indra Agus Riyanto; Ahmad Cahyadi; Dwi Sismoyo; Azura Ulfa; Wilda Aulia Fathoni; Ghalih Nur Wicaksono
Jurnal Geografi, Edukasi dan Lingkungan (JGEL) Vol. 6 No. 2 (2022): Edisi Bulan Juli
Publisher : Pendidikan Geografi Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/jgel.v6i2.9072

Abstract

The transition zone of the Wonosari and Nglanggran Formation in Purwosari District has the characteristics of thick soil, steep slopes, and no outcrops. The different characteristics found in the Wonosari Formation Zone are characterized by polygonal karst formations with thin soil and limestone rocks, and the Nglanggran Formation in the form of thick soil, andesite rock outcrops, and steep slopes. Geomorphological mapping of the Nglanggran and Wonosari Formation can be done easily through morphological approaches and outcrops. Geomorphological mapping is quite difficult to do in the transition of the Wonosari and Nglanggran Formation because it does not have outcrops and is difficult to interpret from morphology. Soil geomorphological approach needs to be done to define landform units for areas that do not have outcrops dan difficult to interpret through morphology. The purpose of this study was to map the geomorphological distribution of soil characteristics in the geological transition zone. The methods used to identify landform units are morphological delineation and soil survey. The morphological delineation for landform units was obtained from aerial photographs. The results of the delineation of landforms from aerial photographs are detailed by soil surveys. The results of the delineation of landforms using aerial photography produce high resolution, smooth, and firm compared to other sources. The results of the delineation of landforms from aerial photos obtained two units of landforms, limestone karst hills, Wonosari formation and andesitic rocky hills, Nglanggran formation. There is a transitional transition zone in the TP7 soil sample with the color change from dark brown (karst) to light brown (old volcanic). The thickness of the soil in the old volcanic is more than 1 meter and deeper than the karst soil (< 60 cm). The transition zone has three soil horizons A, B, and B/C which are classified as more developed than the karst region (A and B horizons). The soil texture in old volcanic is clay and silt, while the dominant karst area is clay.
Karakteristik Hidrogeokimia dan Kualitas Air pada Mata Air Karst Selonjono Karst Gunungsewu Daerah Istimewa Yogyakarta Ahmad Cahyadi; Eko Haryono; Tjahyo Nugroho Adji; Margaretha Widyastuti; Indra Agus Riyanto; Rasyiida Acintya; Naashiruddin Fikri Qushoyyi
Geodika: Jurnal Kajian Ilmu dan Pendidikan Geografi Vol 6 No 2 (2022): Desember 2022
Publisher : Universitas Hamzanwadi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29408/geodika.v6i2.6100

Abstract

Mataair Selonjono memiliki keunikan secara geologi berupa mataair kontak antara dua formasi, sekaligus mataair patahan dan merupakan mataair epikarst. Kondisi tersebut menyebabkan mataair ini memiliki karakteristik hidrogeokimia dan kualitas air yang unik. Penelitian ini bertujuan untuk menganalisis variasi multi-temporal karakteristik hidrogeokimia dan kualitas air Mataair Selonjono. Sampel air diambil secara temporal mulai februari 2020 sampai dengan Januari 2021. Parameter yang diuji adalah suhu, Daya Hantar Listrik (DHL), Total Dissolved Solid (TDS),  pH, Ca2+, Mg2+, Na+, dan K+, SO42-, Cl-, dan HCO3-. Pengolahan data hidrogeokimia dilakukan dengan software Easy Quim v5.0 untuk menganalisis diagram piper segitiga dan diagram Schoeller, sedangkan kualitas air dibandingkan dengan baku mutu air. Mataair Selonjono termasuk dalam klasifikasi airtanah calsium enrichment, calsium/magnesium sulphate pollution, dan sulphate enrichment. Hasil diagram Schoeller menunjukkan pola ion kation dominan adalah Ca2+ dan anion adalah SO42-. Hasil ploting pada scatter plot ion mayor komposisi Mataair Selonjono termasuk dalam klasifikasi silicat weathering atau cation exchange, pelarutan batuan karbonat yang dominan dan pelarutan dari material sulfat dan halit. Hasil analisis baku mutu air Mataair Selonjono secara temporal menunjukkan bahwa hampir semua sampel termasuk memenuhibaku mutu, hanya parameter Ca2+ dan pH yang melebihi. Secara umum kualitas air Mataair Selonjono termasuk kategori sangat baik.
Geomorfologi Tanah Pada Transisi Geologi Formasi Wonosari dan Nglanggran di Kecamatan Purwosari Gunungkidul Yogyakarta Indra Agus Riyanto; Ahmad Cahyadi; Dwi Sismoyo; Azura Ulfa; Wilda Aulia Fathoni; Ghalih Nur Wicaksono
Jurnal Geografi, Edukasi dan Lingkungan (JGEL) Vol. 6 No. 2 (2022): Edisi Bulan Juli
Publisher : Pendidikan Geografi Universitas Muhammadiyah Prof. Dr. Hamka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/jgel.v6i2.9072

Abstract

The transition zone of the Wonosari and Nglanggran Formation in Purwosari District has the characteristics of thick soil, steep slopes, and no outcrops. The different characteristics found in the Wonosari Formation Zone are characterized by polygonal karst formations with thin soil and limestone rocks, and the Nglanggran Formation in the form of thick soil, andesite rock outcrops, and steep slopes. Geomorphological mapping of the Nglanggran and Wonosari Formation can be done easily through morphological approaches and outcrops. Geomorphological mapping is quite difficult to do in the transition of the Wonosari and Nglanggran Formation because it does not have outcrops and is difficult to interpret from morphology. Soil geomorphological approach needs to be done to define landform units for areas that do not have outcrops dan difficult to interpret through morphology. The purpose of this study was to map the geomorphological distribution of soil characteristics in the geological transition zone. The methods used to identify landform units are morphological delineation and soil survey. The morphological delineation for landform units was obtained from aerial photographs. The results of the delineation of landforms from aerial photographs are detailed by soil surveys. The results of the delineation of landforms using aerial photography produce high resolution, smooth, and firm compared to other sources. The results of the delineation of landforms from aerial photos obtained two units of landforms, limestone karst hills, Wonosari formation and andesitic rocky hills, Nglanggran formation. There is a transitional transition zone in the TP7 soil sample with the color change from dark brown (karst) to light brown (old volcanic). The thickness of the soil in the old volcanic is more than 1 meter and deeper than the karst soil (< 60 cm). The transition zone has three soil horizons A, B, and B/C which are classified as more developed than the karst region (A and B horizons). The soil texture in old volcanic is clay and silt, while the dominant karst area is clay.
Co-Authors Ahmad Cahyadi Ahmad Cahyadi **) Azura Ulfa Dwi Sismoyo Eko Haryono Ghalih Nur Wicaksono Margaretha Widyastuti Naashiruddin Fikri Qushoyyi Rasyiida Acintya Tjahyo Nugroho Adji Wilda Aulia Fathoni