一条健康的河流,如果水是很清澈的,那么河流将呈现出“春来江水绿如蓝”;如果水中的生物群落丰富,具有生机勃勃的生态景象,那么河流就会出现“鹰击长空,鱼翔浅底,万类霜天竞自由”的景象。洪河又名洪汝河,淮河上游北岸较大支流。古时称澺水,总长254千米,总流域面积4260平方千米。由于各种原因,洪河在历史上也是几经变迁。可是从70年代开始小洪河遭受污染,河水一天比一天污染严重,失去了往日清澈见底的模样;河内生 If a river is healthy and the water is clear, the river will show a “green spring like a blue river.” If the biological community in the water is rich and has a vibrant ecological landscape, rivers will show up Sky, fish Cheung shallow end, all kinds of frost-free “” scene. Honghe, also known as Hongru River, a larger tributary of the upper reaches of the Huaihe River. In ancient times, it said that it had a total length of 254 kilometers and a total catchment area of ​​4260 square kilometers. Due to various reasons, the Honghe River has also undergone several changes in history. However, since the 1970s, the Honghe River was polluted and the water was polluted day by day, losing its crystal-clear appearance. Hanoi