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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Teknologi Pertanian Andalas
Askin Askin
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Agriculture, Biological Sciences & Forestry Computer Science & IT Engineering

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VARIABILITAS SPASIAL HUJAN DI WILAYAH UPT PSDA DI MALANG Indarto Indarto; Askin Askin
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 6, No 3 (2017)
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (633.841 KB) | DOI: 10.23960/jtep-l.v6i3.171-180

Abstract

This study show the spatial variabilit of rainfall (monthly and annual) rainfall in the area of technical implementation unit of water resources management (UPT-PSDA) in Malang. Administrative area of UPT PSDA in Malang include Malang regency, Malang city, Batu, Blitar Regency, Tulungagung Regency, and Trenggalek Regency. Daily rainfall  data from 88 pluviometers spread around the areas are used as main input. The research procedures consist of : (1) data pre-analysis; (2) the analyses using ESDA tools (Histogram, voronoi, QQ-Plot); (3) interpolation by using IDW method; (4) producing a thematic map; and (5) interpretation.  Analysis using the histogram, voronoi–maps and normal QQ-plots tools illustrates more detail the spatial variability of the monthly and annual rainfall around the regions. Interpolation produces a thematic map of mean monthly-rainfall, between 100 – 400 mm/month. The spatial distribution of annual rainfall was illustrated by a thematic show the average-annual-range from 1000 – 4000 mm/year. Keywords: spatial variability, rainfall, ESDA, IDW, monthly, annual rainfall
Trend and spatial variability of 1-day extreme rainfall from 1980 - 2015: study at the adminisitrative area of UPT PSDA Pasuruan Indarto Indarto; Askin Askin; Muhammad Dian Nurul Hidayat
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol 8, No 1 (2019): MARET
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (2365.039 KB) | DOI: 10.23960/jtep-l.v8i1.29-39

Abstract

This study aims to analyze trends,  shift and spatial variability of extreme-rainfall in the area of UPT PSDA Pasuruan. The daily rainfall data from 64 stations from 1980 until 2015 were used as main input. The 1-day extreem rainfall data is determined as the maximum annual of 24-hour rainfall events.  The statistical  analysis using Mann-Kendall, Rank-Sum, and Median Crossing Test using significance level α = 0,05. The spatial variability of extrem rainfall data is described using average annual 24-hour rainfall during the periods of record. Each station is represented by one value. The values are then interpolated using IDW interpolation methods to maps the spatial variability of extreem rainfall event.  The results show the value of statistical test for each stations that show the existing  trend, shift, or randomness of data. The result also produce thematic maps show the spatial variability of extreme rainfall and the value of each trend.
APLIKASI HISTOGRAM UNTUK ANALISIS VARIABILITAS TEMPORAL DAN SPASIAL HUJAN BULANAN: STUDI DI WILAYAH UPT PSDA DI PASURUAN JAWA TIMUR Dimas Ghufron Ash Shiddiq; Indarto Indarto; Sri Wahyuningsih; Askin Askin
Jurnal Teknologi Pertanian Andalas Vol 22, No 1 (2018)
Publisher : Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (682.219 KB) | DOI: 10.25077/jtpa.22.1.1-12.2018

Abstract

Penelitian ini bertujuan untuk menganalisis variabilitas hujan bulanan di wilayah UPT PSDA di Pasuruan. Wilayah studi mencakup kabupaten Probolinggo, Kota Probolinggo, Kabupaten Pasuruan dan Kota Pasuruan di Jawa Timur.  Data hujan harian dari 93 stasiun, dengan panjang rekaman data dari tahun 1980 sampai dengan 2015 digunakan sebagai input utama. Tahap penelitian mencakup: (1) pra-pengolahan data, (2) analisis variabilitas temporal, (3) Analisis variabilitas spasial, (4) interpolasi dan pembuatan peta tematik dan (5) interpretasi.  Data hujan bulanan diperoleh dari penjumlahan hujan harian. Pra-pengolahan data dilakukan menggunakan excel. Data hujan bulanan ditabulasi selama 35 tahun periode rekaman data. Selanjutnya, metode interpolasi IDW digunakan untuk membuat berbagai peta tematik hujan. Penelitian ini menghasilkan deskripsi variabilitas spasial dan temporal hujan per sub-wilayah dan berbagai peta tematik terkait dengan karakteristik spasial hujan di wilayah tersebut. Hujan bulanan rerata di wilayah tersebut 152 mm/bulan. Hujan bulanan maksimum 798 mm per bulan.
Co-Authors Dimas Ghufron Ash Shiddiq indarto indarto Muhammad Dian Nurul Hidayat SATRIYAS ILYAS Sri Wahyuningsih