My urine has been the color of water for the most part then after a while i go back to normal urination with yellow urine. why is that?

Over hydration.: The kidneys regulate your urine production and concentration. If you are drinking or consuming more liquid than your body needs, your urine will be more dilute and appear clear. After a while, you body begins to absorb more water and the urine becomes concentrated. The level of concentration determines the color. See your physician if you have future concerns.