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Langgeng Wahyu Santosa
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Analisis Genesa Hidrogeokimia Airtanah Menggunakan Diagram Piper Segiempat di Wilayah Pesisir Mice Putri Afriyani; Langgeng Wahyu Santosa; TJahyo Nugroho Adji
Media Komunikasi Geografi Vol. 21 No. 1 (2020)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/mkg.v20i2.21331

Abstract

Penelitian dilakukan di wilayah Kecamatan Lhoknga Kabupaten Aceh Besar. Tujuan penelitian ini untuk menganalisis genesa hidrogeokimia airtanah di wilayah kepesisiran dan menganalis  proses-proses  hidrogeokimia yang terjadi pada airtanah bebas  pada setiap bentuklahan di wilayah kepesisiran. Pengambilan sampel dilakukan dengan mempertimbangkan variasi nilai Daya Hantar Listrik, aliran airtanah dan satuan bentuklahan. Data yang digunakan berupa kandungan ion mayor di dalam airtanah yang diperoleh berdasarkan analisis laboratorium. Analisis tipe hidrogeokimia airtanah  dilakukan dengan menggunakan  diagram piper segiempat. Berdasarkan hasil analisis diagram piper segiempat menunjukkan sebagian besar tipe hidrogeokimia pada daerah penelitian merupakan tipe airtanah semi-bikarbonat (III) yang tersebar merata pada bentuklahan fluviomarin, sementara pada bentuklahan karst, beting gisik muda dan beting gisik tua tipe airtanah semi bikarbonat (II) (tersebar mengelompok. Airtanah bikarbonat (I) terdapat pada bentuklahan karst. Airtanah evaporit (III) tersebar mengelompok pada bentuklahan beting gisik muda dan tanggul alam Selanjutnya, airtanah sulfat (IV) dapat ditemui pada bentuklahan beting gisik tua dan beting gisik muda.
Analisis Ketersediaan Airtanah dengan Metode Statis di Pulau Pasaran Maryadi Budi Wiyono; Tjahyo Nugroho Adji; Langgeng Wahyu Santosa
Media Komunikasi Geografi Vol. 21 No. 2 (2020)
Publisher : Universitas Pendidikan Ganesha

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23887/mkg.v21i2.30259

Abstract

Pulau Pasaran adalah sistem daratan terpisah yang minim sumberdaya airtanah. Jumlah airtanah yang sedikit menjadi sangat rentan hilang akibat konsentrasi unsur cemaran yang tinggi di lingkungan dan pengaruh air laut. Tujuan penelitian ini yaitu: menganalisis ketersediaan airtanah dan kebutuhan air domestik di Pulau Pasaran. Investigasi ketersediaan airtanah dikaji dengan metode ketersediaa air statis. Investigasi kebutuhan air domestik dikaji dengan metode berbasis data sekunder memanfaatkan data hasil survei Ditjen Sumberdaya Air Kementerian Pekerjaan Umum dan Perumahan Rakyat Indonesia. Hasil penelitian menunjukkan bahwa ketersediaan airtanah di Pulau Pasaran sebesar 179359,74 liter per tahun, sementara hasil aman untuk airtanah yang dapat diambil per tahun adalah 14072,84 liter atau 38,5 liter per hari. Kebutuhan air domestik di Pulau Pasaran tahun 2020 berdasarkan hasil analisis ialah sebesar 74040 liter per hari, sehingga dapat disimpulkan bahwa potensi ketersediaan airtanah untuk mendukung kebutuhan air domestik di Pulau Pasaran ialah buruk. Upaya pengelolaan berbasis rainwater harvesting menjadi pilihan yang tepat dalam skala pulau kecil.
Identification of Land Degradation and Method of Solution in Zone of Baturagung Hill at Gunung Kidul Regency Langgeng Wahyu Santosa
Forum Geografi Vol 19, No 1 (2005): July 2005
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v19i1.4571

Abstract

Baturagung hill is a folded hill range consisting mainly of Tertiary volcanic rocks which have been undergoing severe faulting, jointing and weathering. Lies on the altitude between 200 and 700 meter from see level, the area is characterized by sloping to steep relief with 30% to 40% of slope, and shallow soils with scattered outcrops. Such geomorphological setting has made the area subject to intense soil erosion and masswasthing. Mining activates has also been accounted for the explanation of the current heightened land degradation in the area. The present paper, accordingly, is intended to identify the land degradation by considering mass movement, bare land, and mining activity parameters. The present paper founds that the Baturagung hill can be divided into three zones, namely: (1) the zone of no to low degradation (hill slope and inter-hill valley); (2) the zone of high degradation rate (within the area having 30 40% of slope); and (3) the zone of severe degradation (within the area having slope of more than 45%).
Hidrostratigrafi Akuifer sebagai Geoindikator Genesis Bentuk Lahan di Wilayah Kepesisiran Kabupaten Kulonprogo, Daerah Istimewa Yogyakarta Langgeng Wahyu Santosa
Forum Geografi Vol 26, No 2 (2012): December 2012
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23917/forgeo.v26i2.5070

Abstract

Purpose of this research is to study on aquifer hydrostratigraphy that can be a geo-indicator of geomorphological processes on the past, that describe of landform genetic in the research area. The research method is survey. The framework of analysis in this research is landform genetic. The results of the research indicate that: (1) "the forming of aquifer hydrostratigraphy in the research area is controlled by some of main processes in geomorphology, that show of landform genetic specifically". The research area consists of 3 aquifer hydrostratigraphy systems, each of the aquifer system has the typical characteristic, showed by system and pattern of material stratigraphy in the aquifer and variation of groundwater characteristic in the unconfined aquifer. (2) "spatiotemporally, landform genetic in the research area influences on the forming of aquifer hydrostratigraphy in the 3 phases, i.e. the first stage at the end of the Tertiary epoch (end of Pliocene era), second stage at the Quaternary epoch (as long as the Pleistocene period), and third stage at the Holocene era". The genesis and chronology of landform forming in the 3 phases above influence on the forming of system and pattern of aquifer hydrostratigraphy in the research area.
Co-Authors Afriyani, Mice Putri Maryadi Budi Wiyono Tjahyo Nugroho Adji