Distributed between 10 ° north-south latitude and the Tropic of War, typical of central Africa, most of South America and Brazil, and northern and eastern Australia.
High temperature throughout the year, and divided into dry season and wet season. When the equatorial low pressure zone is controlled, the equatorial air mass prevails and precipitation is concentrated;
During the period of trade wind belt control, it was controlled by tropical continental air masses, with drought and little rain. Annual precipitation is generally 700-1000mm,
There is a significantly longer dry season.
How to solve the problem of water use by people in these areas during the dry season, and can rainwater be collected and stored during the rainy season for use during the dry season?