The proposed slice method can be used to estimate the area and periphery of an irregular area in one operation. It subdivides the area into slices by rotating an axis from a centroid. It utilises simple trigonometry to calculate the arc and area of an individual slice then performs nonlinear...
multiply the area by the inches of rainfall and divide by 231 to obtain the runoff in gallons. The factor 231 comes from the fact that the volume of 1 gallon equals 231 cubic inches. When calculating roof
Based on the idea of rational function approximation,this paper proposes a method to calculate atmosphererefraction as the solar in the low angle. By using on"2012 Almanac"observation data as the experimental data,andcomparing with the simplified differential equation and Saemundsson formula,the exper...
Flow velocity is a dynamic and essential parameter in GIUH-based models that are used to conduct runoff simulation in ungauged basins. The accuracy of the GIUH method largely relies on the calculation of the characteristic flow velocity estimation. However, the applicability of velocity calculation ma...