watercourse

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This often results in huge holes in the ground, noxious spoil-heaps and polluted watercourses.
这常常会在地面上留下一个个巨大的坑，有毒的矸子山和污染的河道.
Watercourses once seemed as boundless as those pigeons that darkened the sky overhead, and the notion of protecting water was as silly as bottling it.
水资源曾经很丰富，多的就像天空中黑压压的鸽子一样数不过来。人们曾经很傻地认为把水装进瓶子里就是对水资源的保护。
Time and again, from New Mexico's antique irrigation codes to the UN Convention on International Watercourses, communities have studied water systems and redefined wise use.
从新墨西哥州的古老灌溉法典到联合国国际水资源公约，相关人员已经多次对水系统作了研究并对水资源的合理使用做了重新定义。

But they are living watercourses and once transformed into parks they have the potential to encircle and link the city.
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Much is washed off by rain, ending up in local watercourses where dissolved nutrients can cause algal blooms and kill fish.
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