Floods

Floods

洪水

Chapter 1 What Is a Flood? Water, water, everywhere! It is a flood! Floods happen when water flows over land that is usually dry.

第一章 什么是洪水? 水，水，到处都是!这是洪水! 当水流过通常干涸的土地时，就会发生洪水。

Different things cause floods.Sometimes a big storm pushes huge ocean waves onto land.

洪水是由不同的因素引起的。有时一场大风暴会把巨大的海浪推到陆地上。

Sometimes a lot of rain makes a river or lake overflow. This is what causes most of the floods in America.

有时大量的雨水会使河流或湖泊泛滥。这就是导致美国大部分洪水的原因。

Sometimes a levee breaks. A levee is a wall built along a river to keep it from overflowing. When one gives way, water spills onto land.

有时堤坝会决堤。堤防是沿河流修建的防止河水泛滥的墙。当一个人让路时，水就会溅到陆地上。

Chapter 2 What Happens in a Flood? Floods cause many problems. They wash away trees, plants, and farm crops.

第二章 洪水中会发生什么? 洪水造成许多问题。它们冲走了树木、植物和农作物。