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All Journal Geo Media: Majalah Ilmiah dan Informasi Kegeografian Geosfera Indonesia
Azizah, Vischawafiq
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Earth & Planetary Sciences Education Environmental Science

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Analisis Evapotranspirasi Pada Waduk Bening di SubDAS Brantas Azizah, Vischawafiq; Cholidah, Nina Nila Ziyana; Sari, Risky Rena Anggia; Religi, Muhammad Denzel; Masitoh, Ferryati
Geomedia Majalah Ilmiah dan Informasi Kegeografian Vol. 21 No. 1 (2023): Geo Media: Majalah Ilmiah dan Informasi Kegeografian
Publisher : Universitas Negeri Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21831/gm.v21i1.46327

Abstract

Evapotranspirasi merupakan serangkaian proses bagaimana suatu lahan tanaman mengalami kehilangan kadar air melalui proses evaporasi dan transpirasi. Besaran nilai evapotrasnpirasi sendiri dipengaruhi oleh beberapa faktor, seperti suhu, ketinggian, jenis tanaman, letak lintang, lama penyinaran matahari, curah hujan dan faktor cuaca yang lain (faktor yang berada dalam parameter yang ada). Tujuan dari penelitian ini adalah mengetahui nilai evapotranspirasi di Waduk Bening di kawasan DAS Widas dengan menggunakan ketujuh metode berdasarkan data pada acara sebelumnya dan membuat matrik hasil nilai evapotranspirasi setiap metode yang digunakan. Persamaan metode yang digunakan dalam perhitungan evapotranspirasi estimasi evaporasi yaitu Metode Thornwaite, Metode Blaney Criddle, Metode Blaney Criddle Modifikasi, Metode Turc Lungbein, Metode Penman-FAO, Metode Hargreaves, dan Metode Cristainsen. Hasil nilai dalam perhitungan evapotranspirasi pada semua persamaan metode perhitungan mengalami kenaikan dan distribusi nilainya berbeda-beda serta cenderung meningkat menjelang akhir tahun. Hal ini disebabkan pemanasan global yang terjadi dan kecenderungan rata-rata suhu tahunan yang mengalami kenaikan.
Erosion Prediction Based on Terrestris Survey and RUSLE Method (Revised Universal Soil Loss Equation) in Precet Forest Park, Wagir, Malang Irawan, Listyo Yudha; Wahyu, Hyundra Zakiya Putri; Firdausa, Ayunda Laras; Wijaya, Andhika Ananda; Azizah, Vischawafiq; Prasetyo, Widodo Eko
Geosfera Indonesia Vol. 9 No. 3 (2024): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v9i3.45479

Abstract

Erosion was a process that led to decreased land productivity and soil layer depletion. Four factors affected erosion, including erosivity, erodibility, slope and land cover. This study aimed to assess erosion predictions based on the results of field measurements or terrestrial surveys and the RUSLE method. Precet Forest Park was the location of the research facility. Erosion prediction was conducted by measuring slopes using Total Station. The RUSLE technique with five variables was used to calculate erosion values. These factors included the slope factor (LS), plant management index and ground cover vegetation (C), soil erodibility (K), rain erosion (R), and soil conservation measures (P). The calculation results indicated that the erosivity value (R) was 254.5, the K value was 0.46, the average LS value is was 8.39, the C value was 0.1, and the P value  was 0.9. Calculations using the RUSLE method yielded an average value of the amount of eroded soil in Precet Forest Park of 86.37 tons/ha/year with a soil solum depth of >90 cm. Based on the erosion classification, the grade was classified as class II (Medium). In general, erosion was categorized as high to very high in the middle slope areas of the mountain. This was due to land cover characterised by thick vegetation. In addition, the soil management practices also reduced the value of erosion in Precet Forest Park.
Erosion Prediction Based on Terrestris Survey and RUSLE Method (Revised Universal Soil Loss Equation) in Precet Forest Park, Wagir, Malang Irawan, Listyo Yudha; Wahyu, Hyundra Zakiya Putri; Firdausa, Ayunda Laras; Wijaya, Andhika Ananda; Azizah, Vischawafiq; Prasetyo, Widodo Eko
Geosfera Indonesia Vol. 9 No. 3 (2024): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v9i3.45479

Abstract

Erosion was a process that led to decreased land productivity and soil layer depletion. Four factors affected erosion, including erosivity, erodibility, slope and land cover. This study aimed to assess erosion predictions based on the results of field measurements or terrestrial surveys and the RUSLE method. Precet Forest Park was the location of the research facility. Erosion prediction was conducted by measuring slopes using Total Station. The RUSLE technique with five variables was used to calculate erosion values. These factors included the slope factor (LS), plant management index and ground cover vegetation (C), soil erodibility (K), rain erosion (R), and soil conservation measures (P). The calculation results indicated that the erosivity value (R) was 254.5, the K value was 0.46, the average LS value is was 8.39, the C value was 0.1, and the P value  was 0.9. Calculations using the RUSLE method yielded an average value of the amount of eroded soil in Precet Forest Park of 86.37 tons/ha/year with a soil solum depth of >90 cm. Based on the erosion classification, the grade was classified as class II (Medium). In general, erosion was categorized as high to very high in the middle slope areas of the mountain. This was due to land cover characterised by thick vegetation. In addition, the soil management practices also reduced the value of erosion in Precet Forest Park.
Co-Authors Cholidah, Nina Nila Ziyana Ferryati Masitoh Firdausa, Ayunda Laras Listyo Yudha Irawan Prasetyo, Widodo Eko Religi, Muhammad Denzel Sari, Risky Rena Anggia Wahyu, Hyundra Zakiya Putri Wijaya, Andhika Ananda