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Optimasi Pola Tata Tanam di Daerah Irigasi Jurang Dawir Kabupaten Lumajang dengan Menggunakan Program Dinamik Rizky Akbar Irhamullah Tunggal; Wiwik Yunarni Widiarti; Gusfan Halik
Jurnal Rekayasa Sipil dan Lingkungan Vol 5 No 1 (2021): Jurnal Rekayasa Sipil dan Lingkungan
Publisher : Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/jrsl.v5i1.11996

Abstract

Jurang Dawir Irrigation Area passes through 3 sub-districts, they are Tekung District, Kunir District and Sumbersuko District. Jurang Dawir Irrigation Area is centered on the Dawir DAM located in Mojosari Village, Sumbersuko Sub-District Lumajang Regency. Jurang Dawir irrigation area is 1,088 ha which is divided into several irrigation buildings. The availability of water in the dry season has always been a serious problem in Jurang Dawir Irrigation Area. Therefore, optimization efforts using dynamic program is used to optimize irrigation water so that it can increase yields. The maximum profit that can be obtained from each standard season is Rp. 16,889,092,976.09 with a 9.44% increase in the low season, Rp. 14,963,754,778.30 with an increase of 3.49% in the dry season, and some additional calculations in 2015 reaching to Rp. 16,572,814,376.08 with an increase of 6.11%. ABSTRAK Daerah Irigasi Jurang Dawir melewati 3 kecamatan, yakni Kecamatan Tekung, Kecamatan Kunir dan Kecamatan Sumbersuko. Daerah Irigasi Jurang Dawir berpusat pada DAM Jurang Dawir yang berlokasi di Desa Mojosari, Kecamatan Sumbersuko Kabupaten Lumajang. Daerah irigasi Jurang memiliki luas sebesar 1.088 Ha yang dibagi menjadi beberapa bangunan irigasi. Ketersediaan air pada musim kemarau menjadi masalah serius pada Daerah Irigasi Jurang Dawir. Oleh karena itu perlu dioptimalkan menggunakan program dinamik agar pembagian air menjadi optimal dan mendapatkan keuntungan yang maksimal. Keuntungan optimal yang diperoleh setiap tahun acuan sejumlah Rp. 16.889.092.976,09 dengan peningkatan 9,44% pada tahun rendah, keuntungan sebesar Rp. 14.963.754.778,30 dengan peningkatan 3,49 % pada tahun kering, dan perhitungan tambahan untuk tahun 2015 sebesar Rp. 16.572.814.376,08 dengan peningkatan sebesar 6,11%.
Determination of Subsurface Structure of Landslide Area According to Interpretation of Resistivity Data Supeno Supeno; Nurul Priyantari; Gusfan Halik
Jurnal ILMU DASAR Vol 9 No 1 (2008)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1246.342 KB)

Abstract

Resistivity method is a useful geophysical tool for investigating landslides. It can be used to estimate the subsurface structure of a landslide mass, the depth of the failure surface, and the lateral extent of a landslide. High resolution of resistivity data were obtained by applying Schlumberger configuration, while penetrating deepness was obtained by applying Vertical Electrical Sounding (VES) configuration. Interpretation of subsurface condition showed there was soil layer in survey area which was indicated as slip surface triggering the landslide.
Prediksi Laju Sedimentasi Pada Sungai Jatiroto Hajar Crisia Cahyani; Entin Hidayah; Retno Utami Agung Wiyono; Gusfan Halik; Wiwik Yunarni Widiarti
Jurnal Rekayasa Sipil (JRS-Unand) Vol 17, No 1 (2021)
Publisher : Civil Engineering Departement, Andalas University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jrs.17.1.64-71.2021

Abstract

Erosi dapat menyebabkan terjadinya sedimentasi di sungai. Sedimentasi yang terjadi secara terus-menerus dapat mengakibatkan sungai menjadi dangkal dan mengurangi kapasitas sungai. Sedimen akan mengendap pada bagian tertentu di sepanjang aliran sungai yang tidak mampu terangkut bersama dengan aliran sungai. Sungai Jatiroto merupakan sungai yang membatasi Kabupaten Lumajang dan Kabupaten Jember. Sungai Jatiroto dimanfaatkan untuk keperluan irigasi pada kecamatan Jatiroto dan Kecamatan Rowokangkung. Penyebab dari sedimentasi adalah perubahan tata guna lahan ataupun erosi yang dilakukan oleh sungai itu sendiri. Pemodelan transpor sedimen oleh HEC-RAS bertujuan untuk mengetahui laju sedimen yang terbawa oleh sungai. Pada pemodelan ini dilakukan dua analisis, yaitu analisis hidrolika dan analisis transpor sedimen. Tahap pertama, analisis hidrolika menggunakan debit unsteady, parameter Manning (n) dan koefisien ekspansi dan kontraksi. Kalibrasi model dilakukan dengan cara perbandingan tinggi muka air yang menghasilkan nilai determinasi R2 sebesar 0,9586, nilai RMSE sebesar 0,39 dan masuk dalam kategori baik. Tahap kedua, analisis sedimentasi menggunakan debit quasi-unsteady dan diameter butiran. Fungsi pengangukatan sedimen yang cocok pada pemodelan ini adalah Laursen (Field) dengan laju sedimen sebesar 256,341 m³/tahun. Adapun laju sedimentasi di lapangan dilakukan dengan membandingkan cross section lama dengan yang baru yaitu 289,24  m³/tahun. Uji keandalan (validasi) model dilakukan dengan membandingkan hasil pemodelan dengan data observasi yang didapatkan dari hasil perhitungan volume pengendapan pada cross section. Didapatkan hasil uji keandalan sebesar 88%.
EVALUASI KINERJA SUB DAS ASEM KABUPATEN LUMAJANG Windy Bana Alam Perkasa; Gusfan Halik; Retno Utami Agung Wiyono
Jurnal Riset Rekayasa Sipil Vol 5, No 2 (2022): Maret 2022
Publisher : Civil Engineering Study Program, Engineering Faculty Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (797.114 KB) | DOI: 10.20961/jrrs.v5i2.58139

Abstract

Sub daerah aliran sungai (Sub DAS) adalah satu kesatuan ekosistem yang terdiri dari sumber daya alam dan manusia yang kompleks. Sub DAS berperan sebagai daerah tangkapan hujan yang dalam perkembangan tidak bisa lepas dari segala bentuk tindakan yang dilakukan manusia. Pada Sub DAS Asem, seringkali terjadi masalah akibat tingkat perubahan cuaca yang tidak menentu, serta perubahan tata guna lahan yang ada, mengakibatkan meningkatnya debit air sungai hingga merusak infrastruktur yang ada, oleh karena itu diperlukan evaluasi penilaian dari semua kriteria secara lengkap merujuk pada Peraturan Menteri Kehutanan Republik Indonesia tentang Monitoring dan Evaluasi Daerah Aliran Sungai tahun 2014 mencakup evaluasi kondisi lahan, tata air, sosial ekonomi, investasi bangunan air dan pemanfaatan ruangan wilayah. Hasil dari penelitian ini menunjukkan bahwa nilai kinerja Sub DAS Asem pada tahun 2009 sebesar 86,50 termasuk dalam kondisi baik. Kemudian nilai kinerja Sub DAS Asem pada tahun 2019 meningkat sedikit sebesar 88,75 namun masih termasuk dalam kondisi baik. Sehingga secara keseluruhan daya dukung Sub DAS Asem dalam kondisi baik.
PEMETAAN CEPAT GENANGAN BANJIR MENGGUNAKAN TEKNOLOGI REMOTE SENSING Tedy Pranadiarso; Entin Hidayah; Gusfan Halik
Rekayasa Sipil Vol. 16 No. 2 (2022): Rekayasa Sipil Vol.16. No.2
Publisher : Department of Civil Engineering, Faculty of Engineering, Universitas Brawijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/ub.rekayasasipil.2022.016.02.9

Abstract

The existence of a flood inundation rapid map is needed in flood mitigation. This research is intended to map flood inundation quickly by utilizing satellite image technology. Sentinel 2 Level 1C technology uses before and after the flood. The extraction process uses the methods of NDWI (Normalized Difference Water Index) and MNDWI (Modified Normalized Difference Water Index). The result is treated with a threshold value by dividing the pixel value into flooded and unflooded areas. The performance model shows that the MNDWI method is more accurate than the NDWI method in producing flood inundation maps. Thus, the results of the MNDWI method are practical and able to map flood inundation quickly. 
Reduce Flood Losses Of Kali Tanggul Using Spatial Based Technical Approaches Prabowo Prabowo; Gusfan Halik; Entin Hidayah; Taqiudin Haq
U Karst Vol 5, No 2 (2021): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3462.933 KB) | DOI: 10.30737/ukarst.v5i2.1678

Abstract

Flood disasters frequently occurred in Jember Regency, East Java. It is usually caused by the overflow of the Tanggul River in the rainy season, especially in the downstream area. Flood control could be done by building dams, embankments, shortcuts, and other technical flood protections. Meanwhile, mitigation efforts such as developing thematic maps of flood inundation need to be done to minimize losses caused by the flood. This study aims to design a flood mitigation strategy technically. The flood control structure was proposed by designing a shortcut in Kali Tanggul. Its performance was analyzed to reduce flood inundation in the Tanggul watershed. The flood inundation modeling was carried out using spatial analysis using ArcGIS 10.1 and hydraulic analysis using HECRAS 5.0.3. Flood inundation results were compared with the Tanggul watershed flood map developed by UPT PUSDA Lumajang. Based on modeling results, flood control using shortcuts is considered an effective strategy for flood mitigation. It was indicated by the reduction of flood inundation distributions, flood inundation height, and flood-affected areas. The results show that the flood height decrease 0.47 up to 0.56 m
Performance Assessment of Bondoyudo Watershed Management Hery Budi Sulaksono; Gusfan Halik; Retno Utami Agung Wiyono
U Karst Vol 5, No 1 (2021): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3148.738 KB) | DOI: 10.30737/ukarst.v5i1.1429

Abstract

Continues decrease of vegetation will result in a high erosion and sedimentation rate in the Bondoyudo watershed. This will result in reduced water retention capacity and accelerate land degradation. This study aims to monitor and evaluate the performance conditions of the Bondoyudo watershed according to the assessment parameters of the weighting criteria, which include land criteria, water management criteria, socio-economic criteria, water construction investment criteria, and space utilization criteria. Information about the upper part, middle part, and lower part of Bondoyudo River is collected from primary data, secondary data, and analysis results. The score of the watershed evaluation's carrying capacity is obtained from the results of the analysis from each weighting and scoring value of each criterion and sub-criteria. Watershed performance classifications are obtained by adding up the scores of each criterion. The watershed classification's total score is 103.25, which is classified as a medium recovery level category. It necessary to manage and restore the carrying capacity of the Bondoyudo watershed in supporting the development of water resources so that there is no decline in the performance of the Bondoyudowathersed. Recommended activity plans are water resources conservation, and utilization integrated control and involving stakeholders in watershed management
Accuracy of DSM By Using Unmanned Aerial Vehicles on the Downstream of Welang Riverbank, District of Pasuruan, Jawa Timur Dian Wahyu Khaulan; Entin Hidayah; Gusfan Halik
U Karst Vol 5, No 1 (2021): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3813.891 KB) | DOI: 10.30737/ukarst.v5i1.1153

Abstract

The Digital Surface Model (DSM) is commonly used in studies on flood map modeling. The lack of accurate, high-resolution topography data has hindered flood modeling. The use of the Unmanned Aerial Vehicle (UAV) can help data acquisition with sufficient accuracy. This research aims to provide high-resolution DSM-generated maps by Ground Control Points (GCPs) settings. Improvement of the model's accuracy was pursued by distributing 20 GCPs along the edges of the study area. Agrisoft software was used to generate the DSM. The generated DSM can be used for various planning purposes. The model's accuracy is measured in Root Mean Square Error (RMSE) based on the generated DSM. The RMSE values are 0.488 m for x-coordinates and y-coordinates (horizontal direction) and 0.161 m for z-coordinates (vertical direction).
Assessment and Optimization of Water Division Pattern in Sampean Baru Irrigation Area Joice Prasasty September; Entin Hidayah; Gusfan Halik
U Karst Vol 5, No 1 (2021): APRIL
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (3657.375 KB) | DOI: 10.30737/ukarst.v5i1.1366

Abstract

Recently, agricultural production in the Sampean Baru Irrigation area has not shown optimal cropping production. The average percentage of planted areas in the first (November-February),second (March-June), and third (July-October) planting seasons for the upstream area was 93.67%; 98.02%, and 76.76%, and for the downstream area was 83.54%; 80.81%; and 89.36%. This research aims to optimize the water distribution system based on the calculation of water requirements for plants and the availability of channels to obtain the maximum planting area and amount of agricultural production. This optimization method uses a Dynamic Program with three scenarios. This calculation is based on effective rainfall, crop water requirements, and water discharge availability. Percentage of planted area obtained from the calculation in the dry year for the first, second, and third planting seasons respectively were 100%, 100%, and 90.36%. Based on the existing condition, potential profit obtained for a year is Rp. 170.08 billion. After optimization using Dynamic Program, potential profit in the dry year, normal year, and wet year are IDR 213.52 billion, IDR 215.92 billion, and IDR 228.50 billion, respectively.
Prediksi Curah Hujan Menggunakan Data Hujan Satelit CHIRPS dan PERSIANN-CDR di DAS Bedadung Kabupaten Jember Angel Novita Tri lara Atica; Gusfan Halik; Saifurridzal
Jurnal Teknik Sumber Daya Air Desember 2022
Publisher : Himpunan Ahli Teknik Hidraulik Indonesia (HATHI)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56860/jtsda.v2i2.36

Abstract

Curah hujan merupakan data penting dalam pemodelan hidrologi, pengendalian daya air, perencanaan alokasi air dan pemanfaatan sumber daya air lainnya. Namun, dalam operasionalnya, sering dijumpai data curah hujan yang tidak lengkap karena kerusakan alat atau faktor lainnya. Kemajuan di bidang penginderaan jauh mengarahkan pada perkembangan produk curah hujan berbasis satelit resolusi tinggi. Estimasi curah hujan kuantitatif berbasis satelit telah dikembangkan untuk aplikasi hidrometeorologi, termasuk peringatan banjir dan kekeringan, sumber daya air, dan pemantauan cuaca dan iklim. Penelitian ini bertujuan untuk memprediksi curah hujan menggunakan teknologi penginderaan jauh atau data hujan satelit dari CHIRPS dan PERSIANN-CDR. Prediksi curah hujan dilakukan di DAS Bedadung, Kabupaten Jember periode 2011-2020. Prediksi curah hujan dimodelkan dengan metode kecerdasan buatan atau Jaringan Syaraf Tiruan (JST). Hasil prediksi curah hujan bulanan dengan input data hujan satelit CHIRPS lebih akurat jika dibandingkan dengan data hujan satelit PERSIANN-CDR. Model JST dengan arsitektur JST-C3 (1-20-1) dengan input curah hujan dari satelit CHIRPS memberi keandalan prediksi hujan bulanan yang sangat memuaskan dengan nilai R = 0.908 tahap training dan R = 0.953 tahap validasi. Hasil prediksi hujan bulanan dengan data satelit CHIRPS ini dapat dimanfaatkan sebagai alternatif dalam merancang pengelolaan sumber daya air pada Daerah Aliran Sungai dengan data hujan terbatas.