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同中国相比,日本可以说是个自然灾害更为严重的国家,不但经常发生破坏性极大的地震,而且洪水灾害也很大。尽管日本最长的河流仅300km,但由于台风经常引起暴雨,导致洪水发生。洪水往往来势凶猛,短时间内就会成灾,因为日本的国土面积只占中国的1/21,人口却是中国的1/10,人口密度比中国还大。面对洪水的威胁,日本的防洪主要从两方面考虑。第一是考虑不让洪水跑出来。日本也采用
Compared with China, Japan can be said to be a country with more serious natural disasters. It not only causes frequent and devastating earthquakes but also floods. Although Japan’s longest river is only 300km away, floods occur as a result of torrential rains often caused by typhoons. Floods are often ferocious and can cause disaster in a short period of time because Japan occupies only 1/21 of China’s land area while its population is one-tenth of China’s and its population density is even larger than that of China. In the face of the threat of floods, flood control in Japan mainly from two aspects. The first is to consider not allowing the flood to run out. Japan also adopted