Why are nutrients from the forest washed into rivers?

Nutrients from the forest are washed into rivers primarily due to rainfall and runoff. As rainwater flows over soil and vegetation, it picks up organic matter, minerals, and other nutrients, carrying them into nearby waterways. This natural process helps to fertilize aquatic ecosystems, promoting productivity and supporting diverse plant and animal life. Additionally, disturbances like deforestation or heavy storms can increase erosion, further contributing to nutrient transport into rivers.