Why does urine volume increase after drinking plenty of clean water?

There are two factors that cause the increase of urine volume after the human body ingests a large amount of water: after the body drinks a lot of water, the change of osmotic pressure in plasma will cause the hypothalamus to perceive the change, and the antidiuretic hormone level secreted by the supraoptic nucleus of the hypothalamus will decrease, which will cause the kidney to reduce the reabsorption of water, which will cause the increase of urine volume. At the same time, after a large amount of water intake, the intestinal tract will absorb water into the blood, the effective circulating blood volume of the human body will also increase, the rhythm of heart beating, the ejection fraction will also increase, the blood flow per unit time of the kidney will also increase, and the amount of urine discharged will increase. The liquid and blood pressure in the human body are in a balanced state. When a large amount of water is ingested, it will break the steady state of the body, causing the body to actively discharge too much liquid. If it is not discharged in time, it will cause obvious changes in the water and electrolyte level of the human body, including obvious changes in blood pressure. For example, patients with renal failure will show that the increase of urine volume after a large intake of water is the normal physiological regulation of the body.