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Journal : Journal of Green Science and Technology

Effectiveness of Absorption Wells Using The Sunjoto Method to Control Flooding in The Village of Ngraseh Bojonegoro Mushthofa, Mushthofa; Fadhila, Fajrina Nur; Indriani, Yulia; Faqih, Nasyiin; Qomaruddin, Mochammad
Journal of Green Science and Technology Vol 8 No 1 (2024): Journal of Green Science and Technology Vol.8 No.1 March 2024
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v8i1.133

Abstract

Infiltration wells are a form of hydrological infrastructure used to manage rainwater. Infiltration wells are usually built as part of a rainwater management system to soak rainwater into the ground and reduce surface waterlogging as well as slow down surface runoff and allow rainwater to seep into the ground to renew aquifers or prevent waterlogging. Maintaining groundwater levels is an important step in sustainable water resource management. The aim of this research is to plan effective infiltration wells to replace rainwater catchment areas lost due to building construction. The planning of this infiltration well uses the Sunjoto  method. From the research results, it was found that an effective infiltration well design was calculated using the Sunjoto  method. With the data, each roof area of ​​the house has an optimum number of infiltration wells with a planned infiltration well diameter of 1 m with a depth of 2.5 m with an effective depth according to the calculations is as follows: 60 m2 number of 1 unit of absorption well with an optimum depth of 2.82 m, 80 m2 number of 2 units of absorption well with an optimum depth of 3.76 m, 100 m2 number of 2 units of absorption well with an optimum depth of 4.7 m, 120 m2 number of 2 units of infiltration wells with an optimum depth of 5.64 m, 140 m2 number of 3 units of absorption wells with an optimum depth of 6.58 m, 160 m2 number of 3 units of absorption wells with an optimum depth of 7.52 m, 180 m2 number of 3 units of absorption wells with an optimum depth of 8.46 m, 200 m2 total of 4 units of infiltration wells with  an  optimum depth  of 9.4 m.
Characteristics of The New Material Geopolymer Binder Course Fly Ash and Bottom Ash Saputro, Yayan Adi; Ariyanto, Ariyanto; Qomaruddin, Mochammad
Journal of Green Science and Technology Vol 7 No 2 (2023): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL.7 NO.2 SEPTEMBER 2023
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v7i2.24

Abstract

Selection of concrete specifications is something that must be done according to needs. The use of concrete as a building material is efficiency and effectiveness in terms of processing and supply. The increase in fly ash and bottom ash waste will affect new innovations for new materials in construction. The purpose of this study was to determine the characteristics of the new material geopolymer binder course fly waste and bottom ash whether it complies with standards and is suitable for use as a construction material or for making roads. This research was carried out experimentally in the laboratory to check whether the characteristics of the material used met the standards or not. The results obtained were that the best mixture for the new material was between (FA+BA) with a compressive strength of 5.15 MPa and (FA+PS) with a compressive strength of 25.6 MPa at 28 days old with a mixture composition of 1 : 1.5. As for the mixed wear value (FA+BA) has a wear value of 76% while (FA+PS) has 39% wear. The new material resulting from the wear level can be used as a base course material.
ANALYSIS OF MAPPING OF THE LEVEL OF FLOOD PRONECTION IN BOJONEGORO REGENCY BASED ON GEOGRAPHIC INFORMATION SYSTEM Mushthofa, Mushthofa; Qomaruddin, Mochammad
Journal of Green Science and Technology Vol 7 No 1 (2023): JOURNAL OF GREEN SCIENCE AND TECHNOLOGY VOL.7 NO.1 MARET 2023
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v7i1.13

Abstract

Floods are natural disasters that often occur in various parts of the world, especially in flood-prone areas. Floods occur when water from rivers, lakes or seas overflows beyond its holding capacity. Floods can cause great damage to infrastructure, plants, animals and people. To overcome floods that occur frequently every year, it is necessary to map areas prone to flooding accurately and quickly using GIS which can be used to accurately monitor the location and area of ​​the area that is experiencing flooding. This study aims to analyze flood-prone areas and compile maps of flood-prone areas and describe the conditions of flood-prone areas in Bojonegoro Regency based on Geographic Information Systems (GIS). Data processed using GIS include: RBI Map of Bojonegoro Regency, River Map, Soil Type Map, Rainfall Data, Landsat Imagery Data, Flood incident data in Bojonegoro Regency. From the results of data processing, the results of the analysis are as follows: The level of flood-prone areas in Bojonegoro Regency is divided into 3 classes, namely: very vulnerable class of 49,963.671 Ha or around 21.66% of the sub-districts in Bojonegoro including the District: Margomulyo , Ngraho, Padangan, Kasiman, Malo, Purwosari, Trucuk, Kalitidu, Ngasem, Bojonegoro, Kapas, Dander, Balen, Kanor, Baureno, Sumberrejo, Kepohbaru and Gondang. The vulnerable class of 173,162.171 Ha or around 75.05% is in sub-districts including: Margomulyo, Ngraho, Tambakrejo, Kedewan District, Malo, Trucuk, Sekar, Ngambon, Ngasem, Gondang, Bubulan, Dander, Temayang, Sugihwaras and Kedungadem. The non-prone class is 7,580.157 ha or 3.29% in the sub-districts including: Margomulyo, Ngraho, Tambakrejo, Kedewan, Malo, Trucuk, Sekar, Ngambon, Gondang, Temayang, Sugihwaras and Kedungadem. Areas that have a high level of vulnerability are around the Bengawan Solo River which crosses Bojonegoro Regency. This can be caused because the area around the Bengawan Solo River has a height of <25 m and frequent flooding from the upstream and tributaries of the Bengawan Solo River.
The Effect of Aggregate Gradation Variation on Mechanical Performance and Porosity of Porous Geopolymer Concrete Saputro, Yayan Adi; Qomaruddin, Mochammad; Budianta, Tarsisius Dwi Wibawa
Journal of Green Science and Technology Vol 9 No 1 (2025): Journal of Green Science and Technology Vol. 9 No. 1 March 2025
Publisher : Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jgst.v9i1.9940

Abstract

Porous geopolymer concrete has gained attention as a sustainable and environmentally friendly alternative to conventional Portland cement-based concrete, utilizing industrial waste such as fly ash. This study investigates the effect of aggregate gradation variations on the mechanical properties, porosity, and sustainability of fly ash-based porous geopolymer concrete. The experimental method was employed, utilizing fly ash as the primary binder, sodium hydroxide (NaOH) as the activator, and coarse aggregates of varying sizes (3/8", 1/2", and 3/4"). The concrete samples were tested for compressive strength and porosity at 7, 14, and 28 days following ASTM standards. The results indicate that aggregate gradation significantly influences the mechanical properties, porosity, and sustainability of geopolymer concrete. Smaller aggregate sizes (3/8") produced higher compressive strength (5.42 MPa at 28 days) but lower porosity, while larger aggregates (3/4") increased porosity but reduced compressive strength. Additionally, the study confirms that geopolymer concrete using fly ash as a binder meets the standard requirements for setting time, specific gravity, and durability. These findings contribute to optimizing porous geopolymer concrete for sustainable construction applications, particularly in drainage and permeable pavement systems, promoting waste utilization and environmental sustainability.  Keyword: Porous geopolymer concrete, fly ash, , porosity, waste, sustainability
Co-Authors Abda Rizka Nabella Abdussalam, Ashal Adib, Muhammad Ahmad , Arrisal Khoirudin Ahmad Alfin Ahmad Muzaki Ahmad Muzaki Ainis Safaah Alfin, Ahmad ANDRI KURNIAWAN Arie Irvanto Adhi Saputra Ariyanto Ariyanto Ariyanto Ariyanto Ariyanto Ariyanto Ariyanto Ashal Abdussalam Bobby Rio Darmoko, Wahyu Setyo Decky Rochmanto Decky Rochmanto, Decky Dian Chandrasasi Dian Eko Santoso Dyah Ari Wulandari Fadhila, Fajrina Nur Faqih, Nasyiin Fatchur Roehman Fatimatuz Zahro Febrianty, Ruliana FERI FIRMAN Ferdiasah Han Ay Lie Han Ay Lie Hermawan Hermawan Irene Sitohang Istianah Istianah Istianah Istianah Jamil, Alvian Nur Kharianto, Aan khoiru nisa Khotibul Umam Khotibul Umam Khotibul Umam Luqman Hakim Maemonah, Maemonah Maria Yekiana Mulyahati Maulana Anwar Safi’i Mushthofa Musthofa Musthofa Nabella, Abda Rizka Nastain Nasyiin Faqih Nasyiin Faqih Nasyiin Faqih Nor Hidayati Novita Sari Nunuk Sulistyaningrum Suprapto Nur Khanifah Pamungkas, Hannung Prasetya, Blinka Hernawan Pratama, Andrie Mandala Yudha Purwanto Purwanto Purwanto Purwanto Purwati, Anika Rendy, Oktarisa Aviska Rifa'i, Ahmad Suzaki Roesdina, Tira S. Suripin Saputro, ST., MT., Yayan Adi Saputro, Yayan Adi Sena Mahendra Sholeh Fandi Hendriyono Silviana Ika Ariyani Sitohang, Irene Sri Tudjono Sudarno Sudarno Sudarno Sudarno Sudarno Sudarno Suprapto, Nunuk Sulistyaningrum surya aninda Tarsisius Dwi Wibawa Budianta Tira Roesdiana Tri Hanafiah Munawaroh Tri Hanafiah Munawaroh Tristan, Alfian Ulumudin, Fadhilah Ilham Umam, Sohibul Victor Victor wahyu adhi, Bagas WICAKSONO, ADI Windiya Lista Putri Yayan Adi Saputro Yulia Indriani Zulfahmi, Rifqi Iqbal Zuli Rubiatin Zurfa Isnaini