About 71% of the global coastal population lives in regions experiencing land subsidence, according to a recent study examining urban sinking rates worldwide. Rapid urban development drives excessive groundwater extraction, which compacts underground sediments and pulls the surface downward while climate change intensifies flood risks through rising sea levels and heavier rainfall.
Satellite Monitoring Reveals Asia Sinking Fastest
Advances in satellite monitoring allow researchers to measure land subsidence across cities at fine spatial scales. In a study published in Nature Cities, a team of Chinese scientists analyzed nine years of satellite images across 465 large cities globally. The data show that cities in Asia are subsiding the fastest, and developing countries generally sink more rapidly than wealthier nations.
Citywide averages often conceal sharp neighborhood-level differences. These localized variations carry significant implications for municipal planners deciding where to deploy flood defenses.
Jakarta Northern Coast Sinks Up to Seven Centimeters Annually
In Indonesia, researchers studying the capital have documented severe localized sinking. As a low-lying tropical delta crossed by 13 rivers, Jakarta faces regular threats from both river overflows and ocean tides.
According to a subsidence model for 2016–24 published in Shabrina et al (2026), the city’s northern coastal area sinks by up to 7cm a year. In northern settlements like Muara Angke, where informal housing dominates, vulnerable communities experience flooding as frequently as every other day.
Planning Deficits Undermine Coastal Defenses
To counter rising waters, Jakarta built an extensive network of seawalls, water gates, polder systems, dykes, and pumping stations. Similar infrastructure is proposed for Java, where planners have discussed constructing a giant sea wall across the northern coast.
However, physical barriers alone cannot protect the region without structural changes to urban planning. Land subsidence was largely omitted from Jakarta’s flood management strategies for decades. Although groundwater regulations were introduced in 2021 and implemented in 2023, enforcement remains difficult because groundwater operates as a hidden or fugitive resource.
The core driver of illegal extraction is a persistent lack of reliable piped water, which forces large commercial buildings and residential properties to pump water directly from underground aquifers. While places like Las Vegas and Shanghai have successfully reversed subsidence by injecting water back into aquifers, Jakarta faces complex geological challenges that make technical recharge difficult, leaving strict regulation and piped water expansion as essential remedies.