The correct answer is: B. Electrical analogy method
The electrical analogy method is a method for solving hydraulic problems by analogy with electrical circuits. The method is based on the principle that the flow of water in a hydraulic system can be represented by the flow of electricity in an electrical circuit. The method is particularly useful for solving problems involving complex hydraulic systems, such as canals and pipelines.
The electrical analogy method is a powerful tool for solving hydraulic problems. However, it is important to note that the method is only an approximation. The results of the method should be checked against experimental data to ensure accuracy.
The other options are incorrect because they are not methods for solving hydraulic problems.
A. Bligh’s theory is a theory of the flow of water in porous media.
C. The relaxation method is a numerical method for solving partial differential equations.
D. Khosla’s method of independent variables is a method for solving nonlinear equations.