ABSTRACT
Excessive groundwater extraction is believed to be one of the main factors for land subsidence which may be caused by tidal flooding due to the position of the surface which is lower than sea level. Covid-19 pandemic that has occurred in Indonesia since March 2020 has caused changes in water consumption patterns which derives from piped water and groundwater. There are many offices and industries that implement work from home (WFH) makes many buildings have a declining occupancy rate. With the decrease in the occupancy rate of the WFH policy, there will be a possibility that groundwater consumption from high-rise buildings that draw groundwater from deep aquifers can be reduced. This research is in the form of modelling and simulation that is used to build a level of understanding on a whole system as well as the interrelationships and interactions between its constituent variables. The purpose of this research was to determine the effect of groundwater consumption during Covid-19 pandemic on land subsidence in Jakarta using the dynamic system simulation method. The results showed that the work from home policy reduces groundwater consumption by 64.7%. In addition, the reduction in groundwater consumption during the Covid-19 pandemic caused land subsidence in Jakarta slows down and the rate of land subsidence in Jakarta decreased from 3.7 cm/year to 1 cm/year.
ABSTRACT
Meranti Islands Regency has coastal natural resources. On the other hand, this area also has the potential for natural disasters (coastal) and non-natural disasters that threaten the sustainability of resources and community welfare, so disaster mitigation efforts are needed. This study aims to formulate a model for developing Fisherman communities with a disaster mitigation perspective. This study uses MPE analysis and prospective analysis. The strategic basis for developing fisherman communities is increasing food security through the developing coastal based green industries, capacity building for local competitiveness and conservation of endemic species, and allocating budget proportionally to create local-based economic infrastructure and facilities development. The potential natural disasters that are more dominant in Meranti Islands Regency are abrasion, landslides, high waves and tidal flooding. A non-natural disaster is Covid-19 pandemic. Mitigation must be done is planting mangroves, building sheet piles, social engineering policies must be done by planting mangroves, building sheet piles, social engineering policies, and planting mangroves, building sheet piles, social engineering policies, and alternative livelihoods. The model for developing Fisherman communities with a disaster mitigation perspective in Meranti Islands Regency is optimizing coastal areas’ productivity and livelihood support systems.