Water usage research focuses on understanding how water is used in various sectors such as agriculture, industry, and households, and identifying ways to optimize water usage, reduce waste, and ensure sustainable water management practices. This research area may encompass studies on water consumption patterns, water conservation strategies, water footprint assessments, and the impact of water use on ecosystems and human health. Researchers in this field may also explore the potential for water reuse and recycling, as well as the development of technology and policies to mitigate water scarcity and ensure access to clean and safe water for all.