Effective discharge plays a major part in sediment and nutrient transport, landscape modification, and river restoration. However, a complete understanding of effective discharge is still missing because of heterogeneity in various fluvial processes. The present study investigates the role of effective discharge for suspended sediment transport in a regulated macrochannel river system, the Brahmani River, India. The natural flow-sediment regime and channel pattern of the Brahmani River have been altered by the Rengali dam. The effective discharge is estimated with both analytical and deterministic methods using long-term hydrological data. The results show the control of regulated flow and sediment regime in the post-dam period contributes to the reduction in effective discharge (1849 m³/s to 820 m³/s), where frequent moderate floods are able to transport a maximum portion of sediment load. An effective discharge integrated stream power curve is formulated, which accurately predicts the channel transition (from sinuous to weakly braided) in the post-dam period. Finally, the proposed probability of braiding captures the chute formation correctly, which further highlights the hierarchy of energy dissipation and morphological continuum in the Brahmani River.

有效排放在沉积物和养分的输送，景观改造和河流恢复中起着重要作用。但是，由于各种河流过程的异质性，仍然缺少对有效排放的完整理解。本研究调查了有效的排水量在调节的大通道河系（印度布拉马尼河）中的悬浮泥沙输送中的作用。伦加利大坝改变了布拉马尼河的自然流沙状况和河道格局。使用长期水文数据，可以通过分析和确定性方法来估算有效流量。结果表明，在大坝后期控制流量和泥沙淤积状态有助于减少有效排放量（1849 m ³ / s至820 m³ / s），频繁的中等洪水能够输送最大部分的泥沙负荷。制定了有效的排水综合流功率曲线，可准确预测坝后阶段的河道过渡（从弯曲到弱编织）。最后，提出的编织概率正确地捕获了滑道的形成，这进一步突出了布拉马尼河中能量消散和形态连续性的层次。