Problems when there is

Problems when there is

Problems when there is too much water, or not enough The climate is changing. Warm air carries more water to certain places. Wind and warm air can also transport more water away from places where it is needed. Too much water in a short time increases runoff , erosion and sometimes floods . Too long with too little water causes drought . Some places on Earth now receive too much water during rain seasons, and then too little water afterwards. In those places it is important to slow the flow of water to prevent damage and erosion, and to store it for later use. Stream erosion after a period of heavy rain. Bob Forrest /  Stream erosion  /  CC BY-SA 2.0