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Some places in Java are under pressure regarding their water supply mainly due to high‐density population within a limited area. More serious land subsidence has reached 1–20 cm/year in some areas due to over‐abstraction of deep ground water.
To overcome water scarcity on Java, Indonesia built 24 dams with a total storage capacity of 2,150 million m3 for irrigation covering an area of 196,000 ha,...