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Reosa Andika Firmansyah
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Analisis Kekuatan Bangunan Rumah Terhadap Banjir Berdasarkan Interpretasi Bentuk Atap Mengunakan Sistem Informasi Geografis Di Desa Kaligayam, Kecamatan Margasari, Kabupaten Tegal Reosa Andika Firmansyah; Sudibyakto Sudibyakto; Sunarto Sunarto
EnviroScienteae Vol 16, No 1 (2020): EnviroScienteae Volume 16 Nomor 1, April 2020
Publisher : Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/es.v16i1.9007

Abstract

Flood events in Kaligayam Village occur due to rainwater and overflowing rivers trapped in sloping residential areas. Research on the quality of houses in the face of flooding, by grouping based on the shape of the roof, has not been widely carried out, especially in this research area. The use of GIS to analyze the condition of a house in an emergency situation can still be developed to get more detailed results. The population in this study was the house building unit, and the sampling method uses proportional techniques that were randomly selected. The sample of grouping is based on the roof shape of the house that was acquired with Quickbird image interpretation with 0.6 meter spatial resolution. The results of the acquisition of high-rise building data were built with supporting and validated data through field surveys. The database that is processed using GIS to produce data on classes of house buildings in watching flood data on physical conditions, support, and age of the house building. Inventory of all housebuilding parameter data produces a map of the quality of the house building against flooding. In each form of the roof, the building of the house has a variety of different levels of quality in the face of the danger of flooding. The level of quality of the house becomes five levels (very high, high, medium, low, and very low). The type of roof of the village becomes the type of building that has the best quality which is the type of house building with the highest resilience.
Analisis Kinerja Sumur Resapan dalam Konservasi Air Tanah Pada Daerah Tangkapan Air Mata Air Senjoyo Kota Salatiga Reosa Andika Firmansyah; R Gagak Eko Bhaskoro; Winda Yohana Permata
Jurnal Green Growth dan Manajemen Lingkungan Vol. 15 No. 2 (2025): Jurnal Green Growth dan Manajemen Lingkungan
Publisher : Program Studi Magister Manajemen Lingkungan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/jgg.152.02

Abstract

Mata Air Senjoyo menjadi salah satu sumber air baku utama bagi PDAM Kota Salatiga untuk air bersih masyarakat. Akan tetapi, debitnya mengalami peurunan hingga 25% sejak 2008 (dari 1.115 L/detik menjadi 838 L/detik). Rekayasa teknis melalui sumur resapan meningkatkan debit hingga 600 L/detik pada 2017. Penelitian ini berfokus pada evaluasi kinerja sumur resapan di daerah tangkapan Senjoyo menggunakan data hidrologi, permeabilitas tanah, dan fluktuasi mata air sebelum serta sesudah pembangunan. Hasil analisis menunjukkan suplai air tanah dari sumur resapan mencapai 0,00131 m³/jam. Permeabilitas tanah di Noborejo menunjukanefektivitas yang lebih tinggi daripada di Patemon. Efektivitas yang turun dari 60% (2022) menjadi 30-40% (2024) terjadi karena alih fungsi sumur resapan, kurang pemeliharaan, dan penurunan permeabilitas tanah. Analisis kinerja sumur resapan menunjukkan hasil bahwa sumur resapan butuh pemeliharaan dan monitoring berkelanjutan untuk menjaga efektifitasnya dan kinerja jangka panjang.Kata kunci: Kinerja sumur resapan, Suplai air tanah, Daerah tangkapan airSenjoyo Spring serves as one of the primary raw water sources for Salatiga City's PDAM, supplying clean water to the community. However, its discharge has declined by 25% since 2008 (from 1,115 L/s to 838 L/s). Technical interventions using infiltration wells boosted the discharge to 600 L/s in 2017. This study evaluates the performance of infiltration wells in the Senjoyo catchment area, drawing on hydrological data, soil permeability, and spring discharge fluctuations before and after construction. Results indicate that groundwater recharge from the wells reaches 0.00131 m³/hour. Soil permeability in Noborejo proves more effective than in Patemon. Effectiveness has dropped from 60% in 2022 to 30-40% in 2024, due to well conversions, inadequate maintenance, and reduced soil permeability. Overall, infiltration wells require ongoing maintenance and monitoring to sustain their long-term performance.Keywords: Infiltration well performance, Groundwater supply, Water catchment area
Co-Authors R Gagak Eko Bhaskoro Sudibyakto Sudibyakto Sunarto Sunarto Winda Yohana Permata