According to the article, the high rise buildings are taking a lot of the water from the water table (aquifer). The population is supposed to be spread out, but people are stacking up in a very small area, so there's not enough water for everyone.
2.If you take a lot of water from the aquifer, what three things happen?
First, if you keep sucking water from underground, then the land will go down, because the area that was water is gone, so there's a space underground. The land might not be able to hold the weight the buildings, so it lowers itself, making the buildings likely to crack. Also, because the population is so dense in one area, there's not going to be enough water for everyone.
3.What is the punishment for taking more water than your permit allows?
The punishment is five million rupiah and six months in jail.
4.Do you think this punishment will stop people taking too much water from the aquifer? Why?
I don't think that this law will stop people take the ground water, because five million rupiah is a small amount for high rise building managers/investors. There's also some 'relationship' problems in Indonesia, so the people who are taking too much water can simply avoid the jail.
5.Jakarta’s aquifers are being contaminated by sea water. What else is contaminating Jakarta’s groundwater?
Probably waste chemicals from factories, they might just dump chemical wastes in rivers, or even on land, then the chemicals will soak into the aquifer, polluting the ground water.
6.What evidence is there for the additional contamination in number 5?
The chemicals from factories have been traced in the ground water from wells. A lot of chemicals are radioactive, so they will decay and undergo partial decomposition reactions, leading to new hazardous chemicals, like dichloroethylene.