Nehirler are large natural watercourses that flow towards oceans, seas, or lakes. They are essential components of the Earth's hydrological cycle, collecting rainwater and melting snow from surrounding areas. Rivers can vary in size, length, and speed, and they often shape the landscapes through which they flow. Nehirler provide numerous benefits, including habitats for wildlife, sources of drinking water, and opportunities for recreation. They also play a crucial role in agriculture by irrigating crops. Many civilizations have developed along nehirler, relying on them for transportation, trade, and sustenance throughout history.