Answer:
Humans in South and Southeast Asia have modified the water supply in two major ways. The first is by building dams and embankments to conduct flood management. People living in these regions found a need to control flood waters because they are faced with severe monsoons regularly. Many people live on the flood plains, so monsoons can become very dangerous. Dams and embankments can control flood waters and divert them away from where people live. However, when water is dammed or diverted, its natural flow is changed, preventing sediments from flowing naturally downstream. This can cause the rivers to flood other areas. People in South and Southeast Asia also use water supplies to conduct an activity known as aquaculture. This means that they control and grow seafood and marine products for human use. They create pens, dams, and nets to fence in areas of water where they can grow their products. This is beneficial because it can create a consistent food supply for citizens and an economic product that can be sold. Aquaculture can also have negative effects. For example, fencing in areas of water can change or even destroy marine animals’ natural habitats. Fishing is also an important way in which humans interact with their water supply. When humans fish, they can supply food for members of their population and create an economic commodity that they can export to other parts of the world. However, fishing can also have negative consequences. For example, when people overfish in certain regions, they can wipe out populations of fish and other marine life, which can decrease the biodiversity of certain animals. Boats can also cause water pollution, which can kill marine life and prevent the growth of coral reefs.
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