Soil infiltration is the process by which water on the soil surface penetrates the soil.Quantifying the soil infiltration capacity(soil infiltrability)is very important for determining components of the hydrological m...Soil infiltration is the process by which water on the soil surface penetrates the soil.Quantifying the soil infiltration capacity(soil infiltrability)is very important for determining components of the hydrological modeling,irrigation design and many other natural or man made processes.In this paper,commonly used methods for soil infiltration rate measurement with their principles and application conditions are introduced.The advantages and disadvantages of each method under various application conditions are discussed for comparison.Three new methods for soil infiltrability measurement,including the corresponding algorithm models,and the experimental apparatus and procedures are introduced.These analyses should facilitate the choice of method used for soil infiltrability measurement.展开更多
Semi-circular open channel plays an important role in various applications and the measurement of its discharge is of interests.In this study,theoretical formulae for free overflow in a semi-circular channel are devel...Semi-circular open channel plays an important role in various applications and the measurement of its discharge is of interests.In this study,theoretical formulae for free overflow in a semi-circular channel are developed and presented for the discharge and wetted area relationship.The traditional discharge formulation and available experimental data are used to verify and validate the proposed relationships.The discharges calculated by using the proposed relationship show very good agreement with the experimental data sets.The results from this study supply the basis for circular weir development.展开更多
基金This work was supported by the Natural Science Foundation of China under project No.40635027 and Changjiang Scholars and Innovative Research Team in University。
文摘Soil infiltration is the process by which water on the soil surface penetrates the soil.Quantifying the soil infiltration capacity(soil infiltrability)is very important for determining components of the hydrological modeling,irrigation design and many other natural or man made processes.In this paper,commonly used methods for soil infiltration rate measurement with their principles and application conditions are introduced.The advantages and disadvantages of each method under various application conditions are discussed for comparison.Three new methods for soil infiltrability measurement,including the corresponding algorithm models,and the experimental apparatus and procedures are introduced.These analyses should facilitate the choice of method used for soil infiltrability measurement.
基金supported by Natural Science Foundation of China under project No.40635027with financial support from State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau in China.
文摘Semi-circular open channel plays an important role in various applications and the measurement of its discharge is of interests.In this study,theoretical formulae for free overflow in a semi-circular channel are developed and presented for the discharge and wetted area relationship.The traditional discharge formulation and available experimental data are used to verify and validate the proposed relationships.The discharges calculated by using the proposed relationship show very good agreement with the experimental data sets.The results from this study supply the basis for circular weir development.
