<human>:  How does the flow of water affect the economy of a coastal community?
<bot>: The flow of water greatly affects the economy of a coastal community because it influences the availability of resources, such as fishing and transportation. A decrease in the flow of water, for example, can lead to a decrease in the availability of fish, resulting in a decrease in revenue from fishing. In addition, changes in water flows can also affect transportation systems, with increased or decreased currents affecting the speed and cost of ships and other vessels. Furthermore, disruptions in water flow can also lead to an increase in shoreline erosion, which can have a negative impact on coastal infrastructure.