original: In modern times, the waters are 70% to 90% used for human purposes and the flow is much reduced.
simplifications: Today, flow is lowered due to 70-90% of water being used for human reasons. Today the waters are 70% to 90% used for human purposes and the flow is reduced. Now, the waters are 70% to 90% for human purposes and the flow is reduced. The waters 70% to 90% are for human purposes. The flow is much less. Today, the waters are 70% to 90% used for human purposes. The flow is much lower. Now the waters are 70% to 90% used for human purposes. The flow is much less. Currently, 70 to 90% of the waters are used by humans. Nowadays, the waters are 70%-90% used for human reasons. The flow has also reduced. Today, the waters are 70-90% used for human reasons and the flow is much less. In modern times, the water is used for human purposes from 70% to 90% and the flow is much reduced.