A wadi is a dry riverbed or valley that typically fills with water during periods of heavy rain. Found mainly in desert regions, wadis can be important for local ecosystems, providing a temporary habitat for plants and animals. They often serve as natural drainage channels, directing water away from higher ground. In many cultures, especially in the Middle East and North Africa, wadis are significant for agriculture and settlement. They can support vegetation and crops in otherwise arid areas. The term is commonly associated with regions like the Arabian Peninsula and North Africa, where they play a crucial role in the landscape.