Hydrology has grown as a science in response to the need to understand the Earth's complicated water system and help fix water problems. Hydrology is the enviromental water science. In reality, hydrology has evolved as a science to try and understand the Earth's complex water supply, to research and predict how water would behave in different situations as it passes through the water cycle's ground stage. Our lecturer, Dr Raza has made this subject very interesting and fun to learn. He always emphasised on the important points of each topic so that we students would have a clearer understanding. Moreover, Dr Raza provided the class with various examples from each topic to encourage us to get used to exam-style questions which I find very useful.