The California Delta, also known as the Sacramento-San Joaquin Delta, is a vast estuary located in Northern California. It is formed by the confluence of the Sacramento River and the San Joaquin River, creating a network of islands and waterways. This region is crucial for water supply, agriculture, and wildlife habitat, supporting diverse ecosystems. The Delta is home to several cities, including Stockton and Sacramento, and serves as a vital transportation route for boats and barges. It also plays a significant role in California's water management system, providing irrigation for farms and drinking water for millions of residents.