Estimating Land Subsidence in Relation to Urban Expansion in Semarang City, Indonesia, Using InSAR and Optical Change Detection Methods

Koch, Magaly; Gaber, Ahmed; Darwish, Noura; Bateman, Juliette; Gopal, Sucharita; Helmi, Muhammad

doi:10.1109/igarss.2019.8897970

Cited by 4 publications

(8 citation statements)

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“…Several texts state their aim to support urban and regional planning by creating models and maps (e.g. Abidin et al, 2015;Rimba et al, 2018;Sarah et al, 2011Sarah et al, , 2020, or follow the argument of Widada et al (2020) that 'monitoring is part of mitigation' (Yastika, 2019;Koch et al, 2019). We identify three implicit claims of land subsidence science in the literature: Action about subsidence should be taken, geological and engineering sciences should be at the basis of these policies (literally in Sarah and Soebowo: 'Results of scientific research should be the basis of administrative policy and control ', 2018: 4), and the municipal and regional level are the appropriate scales for policy making.…”

Section: Political Axiology: Motivations For Exploring Land Subsidencementioning

confidence: 99%

Destabilizing the science of soils: Geoscientists as spokespersons for land subsidence in Semarang, Indonesia

Belland,

Kooy,

Zwarteveen

2023

Environment and Planning E: Nature and Space

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In this article, we explore how land subsidence is scientifically known in the coastal city of Semarang, Indonesia. We do so to ask questions about how the authority of this scientific knowledge is or not effective to help slow down land subsidence? We examine the scientific methods used to measure where, and at what rate, subsidence occurs, and we inventory the theories mobilized to interpret and explain them. Our analysis shows how land subsidence resists being fully or unambiguously known; its science remains somewhat speculative. We explore how, in Semarang, but also more broadly, this makes it difficult for subsidence scientists to act as effective ‘spokespersons’ for subsidence; their predictions lack certainty and confidence. As we follow the subsidence debates in Semarang we document how subsidence scientists need the authority of science to speak convincingly to powerful elite coalitions of government agencies and private companies, who have vested interests in ignoring or denying their role in causing or accelerating subsidence. We identify this as one reason why subsidence scientists deploy great efforts to present themselves, and their science, as separate from politics and society, as detached and therefore objective. Beyond contributing to emergent discussions in science and technology studies about how science shapes underground politics, our analysis opens up and sheds new light on the question of how scientific facts become entangled with politics in societal controversies.

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Section: Political Axiology: Motivations For Exploring Land Subsidencementioning

confidence: 99%

Destabilizing the science of soils: Geoscientists as spokespersons for land subsidence in Semarang, Indonesia

Belland,

Kooy,

Zwarteveen

2023

Environment and Planning E: Nature and Space

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“…This process could be used to provide a comprehensive understanding of the spatial pattern, rates, and displacement of land subsidence [1,49,50] by assessing elevation changes over time [2,22] and to estimate future conditions [3,51]. This is also the initial step in mitigating the risk of land subsidence [1,[52][53][54]. Effective monitoring measures is necessary to help developers or individuals to take the best action in adapting to subsidence [8].…”

Section: Advancement In Land Subsidence Rate Monitoring Measuresmentioning

confidence: 99%

“…Critical reviews also stated that this method had flaws, such as overestimation and the "no-subsidence" bias caused by low coherence data. [3,22,25,28,30,36,51,54,75,76].…”

Section: Advancement In Land Subsidence Rate Monitoring Measuresmentioning

confidence: 99%

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Progress or Regress? A Systematic Review on Two Decades of Monitoring and Addressing Land Subsidence Hazards in Semarang City

2021

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Land subsidence is a major cause of environmental degradation. It increases the exposure of global sea level rise-related disasters in coastal cities lying on young sediment. Ample monitoring, adaptation, and mitigation measures have been taken to tackle the impact of such coastal hazards for decades in Semarang City. However, to date, land subsidence still has a negative impact on people’s quality of life. This brings us to the question of whether the measures are progressing towards better management or going to the opposite side. This paper is aimed to answer that question through an extensive literature review using PRISMA Guidelines to 125 scholarly articles and quantitative supporting analysis. We found that land subsidence is overlooked. Although the monitoring measures are progressing towards better technology utilization, it was not properly integrated into mitigation and adaptation measures. Instead of investing more on developing better urban water management, groundwater extraction still became the preferred water source. Thus, there is a major shift needed with regard to urban activities that need to pay more heed to the environment.

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“…Laju penurunan muka tanah menyebabkan peningkatan yang cukup signifikan dalam penambahan luas wilayah yang tergenang (Suhelmi, 2012). Perubahan penggunaan lahan dengan penurunan tanah menurut Koch et al (2019) menunjukkan bahwa adanya korelasi wilayah perkotaan (kepadatan penduduk) dan luas banjir dengan Berdasarkan data titik tinggi yang telah diolah menjadi DTM, maka dapat diketahui representasi keadaan topografi di lokasi penelitian yang ditampilkan pada gambar 5.…”

Section: Kenaikan Muka Air Lautunclassified

Analisis Geospasial Area Genangan Banjir Rob dan Dampaknya pada Penggunaan Lahan Tahun 2020 - 2025 di Kota Pekalongan Provinsi Jawa Tengah

Iskandar

Helmi

Muslim

et al. 2020

Indonesian Journal of Oceanography

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Perubahan iklim dapat menyebabkan peningkatan temperatur laut yang berdampak pada kenaikan muka air laut karena pencairan es di kutub. Naiknya muka air laut menimbulkan ancaman bagi wilayah yang berada di wilayah pesisir dan pantai, salah satunya adalah Kota Pekalongan. Salah satu dampak yang ditimbulkan adalah banjir rob. Banjir rob diakibatkan pasang air laut dan diperparah oleh fenomena kenaikan muka air laut serta penurunan muka tanah sehingga menjadi faktor dalam perluasan genangan banjir rob. Tujuan dari penelitian ini adalah melakukan pengolahan data dan mengkaji karakteristik pasang surut bulan Februari 2020 serta laju kenaikan muka air laut, mengetahui laju penurunan muka tanah berdasarkan citra Satelit SAR Sentinel-1 tahun 2017-2019 untuk rekonstruksi topografi pada tahun 2025, dan analisis luas area genangan banjir rob pada penggunaan lahan bulan Februari 2020 dan prediksi tahun 2025. Metode yang digunakan untuk komponen pasang surut dihitung dengan menggunakan metode Admiralty, kenaikan muka air laut dengan metode regresi linier, laju penurunan muka tanah dengan metode DInSAR dan pemetaan genangan banjir rob dengan pemodelan geospasial. Hasil dari penelitian ini menunjukkan nilai selisih HHWL dan MSLpada bulan Februari 2020 adalah 45,99 cm. Kenaikan muka air laut adalah 4,3 mm/tahun. Penurunan muka tanah rata-rata Pekalongan Utara, Pekalongan Barat, Pekalongan Timur, dan Pekalongan Selatan sebesar 24,13 cm/tahun, 22,83 cm/tahun, 21,94 cm/tahun, dan 20,40 cm/tahun. Luas daerah yang tergenang banjir rob pada bulan Februari 2020 dengan total 477,57 hektar. Prediksi luas area yang tergenang banjir rob tahun 2025 dengan total 1877,07 hektar. Pengaruh penurunan muka tanah menjadi faktor paling tinggi dibandingkan dengan kenaikan muka air laut terhadap perubahan luas genangan banjir rob.

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Estimating Land Subsidence in Relation to Urban Expansion in Semarang City, Indonesia, Using InSAR and Optical Change Detection Methods

Cited by 4 publications

References 4 publications

Destabilizing the science of soils: Geoscientists as spokespersons for land subsidence in Semarang, Indonesia

Destabilizing the science of soils: Geoscientists as spokespersons for land subsidence in Semarang, Indonesia

Progress or Regress? A Systematic Review on Two Decades of Monitoring and Addressing Land Subsidence Hazards in Semarang City

Analisis Geospasial Area Genangan Banjir Rob dan Dampaknya pada Penggunaan Lahan Tahun 2020 - 2025 di Kota Pekalongan Provinsi Jawa Tengah

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