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Wahid Akhsin Budi Nur Sidiq, Wahid Akhsin Budi Nur
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Journal : Geosfera Indonesia

 1 
Land Use Change Analysis to Springs Conditions in Gunungpati Sub-District, Semarang City Wahid Akhsin Budi Nur Sidiq; Tjaturahono Budi Sanjoto; Nana Kariada Tri Martuti
Geosfera Indonesia Vol. 7 No. 2 (2022): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v7i2.32085

Abstract

Semarang City has the fastest development in Central Java Province, where the activities are no longer centralized but have expanded to the upper part of the region. The ongoing development certainly impacts changes with the increasing area of built-up land that converts to another cover, such as vegetation. The phenomenon impacts the balance of the environment, one of which is the source of springs. Therefore, this study aims to map the spatial distribution of the springs and identify their physical quality. A quantitative approach was used with spatial analysis. Meanwhile, data collection techniques used document research, high-resolution image interpretation and field surveys. Field surveys were conducted to test the accuracy of land use maps and measurements of discharge, temperature, pH and brightness of the springs. The results showed that there is a change in land use from 2016 - 2021 with an increase in settlements of around 77.25 hectares and commercial service buildings by 178.79 hectares. For land use with the largest decrease in area, agricultural land covers and mixed garden/vegetation covers an area of ​​207.01 and 50.57 hectares. There were 114 springs at the research site, of which 5% of the springs had a relatively large discharge above 10 liters/second, while the other 47% had a small discharge. For pH conditions, there were 6 springs with a pH value of less than 6. Land use change from vegetation to flying land impacts the reduction of the water supply in the soil. The impact can be seen by the non-production of several springs, where 21 springs have not been discharged. In conclusion, there is a change in land use with an increase in built-up from 2016 - 2021 by 256.04 hectares. The increase in built-up is partly in conservation areas, hence damaging several springs. Keywords : Land use change; Springs conditions; Gunungpati Sub-District Copyright (c) 2022 Geosfera Indonesia and Department of Geography Education, University of Jember This work is licensed under a Creative Commons Attribution-Share A like 4.0 International License
Analysis of Mangrove Density Levels Change Based on Cloud Computing on Abrasion Area in the Coast of Semarang City Sidiq, Wahid Akhsin Budi Nur; Sanjoto, Tjaturahono Budi; Nayan, Nasir; Sriyanto; Fariz, Trida Ridho
Geosfera Indonesia Vol. 10 No. 1 (2025): GEOSFERA INDONESIA
Publisher : Department of Geography Education, University of Jember, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/geosi.v10i1.48079

Abstract

The coastal areas of Semarang City have experienced land conversion due to development activities that threaten mangrove sustainability in recent years. The urgency of this research is the need to monitor mangrove density levels to be used as input in its management. The purpose of this study is to analyze changes in mangrove density levels and the occurrence of abrasion in time series using the Google Earth Engine cloud computing model. The research method used visual interpretation and spectral transformation of NDVI and MNDWI to identify spatial distribution, mangrove density and abrasion. The results showed that there was a significant decrease in mangrove area in 2019-2023 with an area of 111.74 hectares. Furthermore, the level of mangrove density is quite dynamic, especially for high density with a decrease in area from 2019 - 2023 with an area of 260.25 hectares, besides that the decline in high density mangroves also occurred in 2015 - 2023 with a decrease in area of 38.73 hectares. Abrasion in the research location was identified in 2 coastal villages, namely Mangunharjo Village with abrasion along 0.88 km (2015 - 2023) and Tugurejo Village with abrasion along 1.04 km, where both areas also experienced a decrease in mangrove area at a high-density level. In conlusion, there has been a decrease in the area and density of mangroves in the study site, one of which has an impact on abrasion.
Co-Authors Abda Abda Abdul Jabbar Abdul Jabbar Agus Ananto Widodo, Agus Ananto Amalia, Venny Amalia, Venny Amidi Amidi Ananto Aji, Ananto Andi Irwan Benardi, Andi Irwan Andin Irsadi Apik Budi Santoso Aprillia Findayani Apristiai, Lelu Dina Arina Sofiyatur Rohmah Budiansyah, Dadan Dewi Liesnoor Setyowati Dhoni Hartanto DIMAS WICAKSONO Ditha Prasisca Mutiatari Etty Soesilowati Eva Banowati Fahrudin Hanafi, Fahrudin Falisah, Dwi Fiska Fauziyah, Nur Laily Fredy Hermanto, Fredy Fulia Aji Gustaman, Fulia Aji HARIYANTO HARIYANTO Haruman, Willar Isti Hidayah Juhadi Juhadi Juhadi Juhadi Khair, Amar Sharaf Eldin Krissantia Serlin Anjarlina M Nurul Huda Fadli Zaka M. Nurul Huda Fadli Zaka Maharanti, Luxiant Rizqika Putri Mahmud, Arif Khoir Margareta Rahayuningsih Nugroho Edi K Melati, Inaya Sari Mochamad Lutfi Mas’ud Mohammad Ilham Muhyidhin Muhammad Fauzan Ramadhan Muhammad Ihsanurrohman Mutiatari, Dhita Pracisca Mutiatari, Dhita Prasisca Nana Kariada Trimartuti Nanik Setyowati Nayam, Nasir Nayan, Nasir Nur Kusuma Dewi Pradika Adi Wijayanto Priakusuma, Dwi Purnomo Adi Saputro Purwaningsih, Iis Purwaningsih, Widya Purwaningsih, Widya Rachmasari, Danvie Rafika Fitri Rahayu, Rr. Sri Ratna Rahma Hayati Ramadhan, Dani Ridwan, Arifin Rohmah, Arifah Nor Roisyah Budiati Saptono Putro Satya Budi Nugraha Somantri, Dadang Sri Mulyani Endang Susilowati, Sri Mulyani Endang Sriyanto Sriyanto Sriyanto Sucihatiningsih Dian Wisika Prajanti Sumarso, Muhammad Yunan Tjaturahono Budi Sanjoto Tjaturahono Budi Sanjoto Tjaturahono Budi Sanjoto Toriqo Gusniar Ramadhan Trida Ridho Fariz Trimartuti, Nana Kariada Tsabit Azinar Ahmad WAHYU SETYANINGSIH Wiluyana, Ageng Ihsani Zulfikar Ardiansyah Fajri