The seasonal variations in water and sediment discharges affect the distributions of annual runoff and sediment discharge.
水沙的季节性变化影响着年内的径流量、输沙量的分配情况。
Annual runoff volume and annual sediment discharge as a whole take on a synchronously-decreasing trend, and the evolution process is characterized by obvious stages.
年径流量、年输沙量总体均呈同步减少趋势，在演变过程中表现出明显的阶段性。
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