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建立了估算径流量及产沙量的3层水箱模型。将总产沙量乘以产沙量系数计算出每层水箱的产沙量,而总产沙量则是每层水箱的径流量与该水箱的含沙量之积。第1层水箱的含沙量由其蓄水量与含沙量分布(SCD)计算出来,而下一层水箱的含沙量则由其蓄水量和上层水箱的泥沙渗透量得出,以此类推。递增的径流源(即有效降雨量)所引起的SCD由瞬时单位产沙过程线(IUSG)和泥沙演算函数得出。利用水箱模型与IUSG模型通过SCD来计算产沙量,然后将水箱模型得出的产沙量与IUSG模型获得的产沙量进行比较。最后,将该水箱模型在密西西比河西北的一个高原流域进行验证。
A 3-tank model was established to estimate runoff and sediment yield. The total sediment yield multiplied by the sediment yield factor to calculate the sediment yield of each tank, and the total sediment yield is the water runoff of each tank and the sediment concentration of the tank. The sediment concentration of the first tank is calculated from its water storage and sediment distribution (SCD), while the sediment concentration of the next tank is calculated from its water storage capacity and sediment infiltration of the upper tank. And so on. The SCD caused by incremental runoff sources (ie, effective rainfall) is derived from the instantaneous unit sediment production line (IUSG) and the sediment calculation function. Sediment production was calculated by SCD using a tank model and an IUSG model, and the sediment yield obtained from the tank model was compared with that obtained from the IUSG model. Finally, the tank model was validated in a plateau basin northwest of the Mississippi.