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All Journal Jurnal Sains Teknologi dan Lingkungan (JSTL)
Agus Suroso
Jurusan Teknik Sipil Fakultas Teknik, Universitas Mataram
Agriculture, Biological Sciences & Forestry Computer Science & IT Public Health

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Koreksi Bias Data Hujan Luaran GCM ECHAM5 Untuk Prediksi Curah Hujan Bulanan dan Musiman Pulau Lombok: Bias Correction for GCM ECHAM5 Model Rainfall Data Output in Estimating Monthly and Seasonally Rainfall for Lombok Island Humairo Saidah; Agustono Setiawan; Lilik Hanifah; Eko Pradjoko; Agus Suroso
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 7 No. 2 (2021): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v7i2.289

Abstract

This study aims to evaluate the ability of the ECHAM5 GCM model output data in estimating monthly rainfall on the island of Lombok. The data used in this study are ECHAM5 monthly rainfall data and automatic rainfall recorder (ARR) measurement rain data for 2000-2018 obtained from ARR Gunung Sari. Correction of bias is conducted by using the mean ratio method and the regression method. The method that produces the best approach is then used to obtain rain data projections and a simple regression method. Evaluation and validation used the Pearson correlation coefficient (r), Root Mean Square Error (RMSE) and Nash-Sutcliffe Efficiency (NSE) values. The results obtained are that the daily and monthly rainfall data from the ECHAM5 model cannot be directly used to replace the rain measurement data because of its very low accuracy. The downscaling technique performed on daily and monthly rainfall data using the average ratio method does not show satisfactory performance where the efficiency figures produced are still low even gave a slight increasing number. However, the ECHAM5 model data can be used to obtain rainfall projections on a monthly and seasonal scale with a good and satisfactory correlation.  Key words: mean ratio method; global climate model; ECHAM5; monthly rainfall.
Analisis Distribusi Dan Hubungan Regresi Antara Parameter Pada Sistem Jaringan Irigasi Perforasi I Dewa Gede Jaya Negara Negara; Agus Suroso; Anid Supriyadi; Heri Sulistiyono; Lalu Muhamad Dicko Febriza
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 12 No. 1 (2026): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v12i1.990

Abstract

The diversity of dryland topography, such as flat land, sloping land, and even steep slopes, often becomes an obstacle in the development of agricultural businesses. One of these obstacles is the limited water sources and the method of providing water in appropriate agricultural development. Currently, many irrigation systems have been developed, but the sprinkler irrigation system with perforated pipes is still very rarely used in the field. The perforated irrigation system is an irrigation system with perforated pipes, where water pressure is used as energy to emit water to the land in one or two land lines. This perforated irrigation test aims to determine the effect of variations in the length of the perforated pipe and variations in the head on the distribution of irrigation in the lateral pipe and in each perforation hole in the lateral pipe and to find the regression relationship of these parameters. This perforated pipe irrigation system test used three lateral pipes with a distance between the pipes of 1 m and a water tank height of approximately 3 meters with a capacity of ± 200 liters. The test was carried out on three variations in the length of the lateral pipe, namely L1 = 4 meters, L2 = 5 meters, and L3 = 6 meters with a diameter of 1/2 inch, the distance between the perforation holes is 60 cm. Meanwhile, the variations in the test head heights consisted of h1 = 350 cm, h2 = 360 cm, h3 = 370 cm, and h4 = 380 cm. The results showed that irrigation distribution was more stable at lengths L1 and L2, and the larger the head, the smaller the average irrigation deviation. There was a decrease in irrigation distribution of 23.33 ml for every 60 cm increase in perforated pipe length. In general, the regression relationship between irrigation yield and the position of the perforated pipe holes is polynomial regression
Perubahan Iklim dan Pengaruhnya terhadap Debit Sungai di Kota Mataram Humairo Saidah; Salehuddin Salehuddin; Lalu Wirahman Wiradarma; Agus Suroso; Agustono Setiawan
JURNAL SAINS TEKNOLOGI & LINGKUNGAN Vol. 12 No. 1 (2026): JURNAL SAINS TEKNOLOGI & LINGKUNGAN
Publisher : LPPM Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/jstl.v12i1.1068

Abstract

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Co-Authors Agustono Setiawan Anid Supriyadi Eko Pradjoko Heri Sulistiyono Humairo Saidah Humairoh Saidah I Dewa Gede Jaya Negara Negara Lalu Muhamad Dicko Febriza Lalu Wirahman Wiradarma Lilik Hanifah Salehuddin Salehuddin