International Water Law refers to the set of legal principles and agreements that govern the use and management of water resources shared between countries. It aims to promote equitable and sustainable use of transboundary water bodies, such as rivers and lakes, ensuring that all nations benefit while protecting the environment. Key treaties, like the United Nations Watercourses Convention, provide guidelines for cooperation, dispute resolution, and the protection of ecosystems. These laws help address challenges such as water scarcity, pollution, and climate change, fostering collaboration among nations to manage their shared water resources effectively.