E3S Web Conf.
Volume 148, 2020The 6th Environmental Technology and Management Conference (ETMC) in conjunction with The 12th AUN/SEED-Net Regional Conference on Environmental Engineering (RC EnvE) 2019
|Number of page(s)||6|
|Section||Disaster Preparedness and Mitigation|
|Published online||05 February 2020|
Indonesia: Threats to physical urban water problems
1 United Nations University Institute for the Advanced Study of Sustainability (UNU-IAS) 5-53-70, Shibuya-Ku, Tokyo 150-8925, Japan
2 Graduate School of Science and Technology for Innovation, Yamaguchi University 2-16-1 Tokiwadai, Ube-shi, Yamaguchi 755-8611, Japan.
The world population percentage placed Indonesia in fourth place of the highest populated countries in the world. The majority of Indonesians live in an urban area. Java Island is the highest populated island in Indonesia, especially in Jakarta, Semarang, and Surabaya. This study showed the flood depth in these three cities, which has become a yearly threat during the rainy season. At the same time, another problem due to water withdrawal was analyzed. Land subsidence has occurred due to simultaneous water withdrawal and overload of alluvial soil due to land-use conversion. A remote sensing data and geographical information system (GIS) took account in this analysis to achieve the aim of this study. The hydraulic model was created to produce a flood depth map, and differential interferometric synthetic aperture radar (DInSAR) technique generated a land subsidence map. This study aims to show the problem in these three cities related to water in urban areas. This study found that all study areas had a severe risk of flood and land subsidence. Semarang received more threats to flood and land subsidence comparing to the other cities.
© The Authors, published by EDP Sciences 2020
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