The discharge process has undergone major changes in many river basins throughout the world as a result of simultaneous influences global climate change and human activity. Flow duration curves (FDCs) are crucial indicators basins’ hydrological processes. However, it is challenging to compare FDCs quantitative way. This study will identify best function with which fit flow curve semi-arid regio...

Abstract A recent article [1] considered the so-called ‘ideal curve flow’, a sixth-order curvature flow that seeks to deform closed planar curves with least variation of total geodesic in L2 sense. It was critical analysis there length bound on evolving curves. is natural suspect therefore length-constrained ideal should permit more straightforward analysis, at case small initial ‘energy’. In t...

By far, different models for determining the relationship between the flow rate  and amount of precipitation have been developed. many models are based on regression models with limited assumptions. one of the most common methods for estimating  sediment of rivers is sediment rating curve. for better estimation of the amount of sediment based of sediment curve  rating equation, it is possible t...