“兵来将挡,水来土掩”,一物降一物,天公地道。谁听说过水来了反而用水挡的事?可是水利科学家们匠心独运,巧妙地调动这一部分水,去“攻击”和征服另一部分水,真正实现了“水来水掩”。而且靠水本身的力量,进行“以水拦水”、“以水蓄水”、“以水输水”和“以水提水”,广泛用于防洪、灌溉、航运、发电、河道治理和工程施工等方面,成为一种独具特色的治水手段。这里,我们不妨统称其为“以水攻水”的技术吧。暴雨季节,洪水泛滥。滔滔洪流呼啸着直扑村庄和良田。正当人们慌恐而不知所措的时候,忽然从洪水中冒出一条神奇的大堤,越“长”越高,横冲直撞的洪浪立刻受到抵抗,锐气顿失。仔细看,这道防洪大堤90％的成分竟是水。这是日本东京新研制的一种“防洪武器”,叫吸水式凝胶袋。这东西抛进水流,立即吸水迅速膨胀,4分钟膨胀可达5厘米厚,膨胀到16厘米厚时,表面的非滑动层使袋子互相“咬” “Soldiers will block, water to soil cover,” a thing down, Heavenly Road. Whoever has heard about water instead of using water? However, water conservancy scientists are very creative and skillfully mobilize this part of the water to “attack” and conquer the other part of the water, to truly “water and water cover.” And by the power of water itself, it is widely used in flood control, irrigation, shipping, power generation, watercourse management, water conservancy and water conservation, water storage, water delivery and water extraction Construction, etc., to become a unique means of water control. Here, we may collectively referred to as the “water attack” technology it. Rainy season, flooding. Torrent roared straight toward the village and farmland. Just when people panic and overwhelmed, suddenly emerge from the flood in a magical embankment, the more “longer” higher, the rampage of the hurricane was immediately resisted, lost their spirit. Look closely, this flood control dike 90% of the composition was actually water. This is a newly developed “flood control weapon” in Tokyo, Japan, called a water-absorbing gel bag. This thing thrown into the water immediately absorbed water quickly expanded 4 minutes swelling up to 5 cm thick, expanded to 16 cm thick, the surface of the non-slip layer so that the bag each other “bite”