How I exploit tide gauges to develop geospatial maps


“Indonesia contains greater than 17,000 islands. As a result of a lot of the nation is surrounded by water, it’s vital to concentrate to coastal areas. Many coastal cities, together with Jakarta, are experiencing subsidence owing to geological processes and coastal dynamics. Rising sea ranges, altering tides and flooding, ensuing from local weather change, are already inflicting struggling alongside the northern coast of Java.

I began finding out the impacts of local weather change on Indonesia’s coastal areas in 2005, as a PhD pupil on the Justus Liebig College Giessen, Germany. I’m persevering with this work as we speak as head of the Geospatial Info Company of Indonesia.

My colleagues and I keep 260 tide-gauge stations across the nation, and plan to ascertain 32 extra in 2024. These unstaffed stations present real-time information each 5 seconds, and the knowledge is utilized by numerous companies and researchers to observe sea-level rise, subsidence patterns, tsunamis, earthquakes and the impacts of local weather change.

Earlier than we are able to arrange a tide-gauge station, we’ve got to make sure that it’s positioned at exact coordinates in order that it matches the elevations of the opposite stations. On this photograph, I’m serving to to arrange a brand new gauge on the Muara Angke harbour in Jakarta through the use of a GPS instrument on a tripod to measure the station’s coordinates. The instrument permits me to get horizontal and vertical measurements on the millimetre scale.

I additionally use information from the tide gauges to create a reference map that’s utilized by all of the ministries and different companies in Indonesia to develop their very own maps. These maps will assist to deal with future climate-change challenges in Indonesia by exhibiting exact patterns of shoreline measurements, marine sources, coastal settlements, erosion and flooding.”

This interview has been edited for size and readability.

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