我很清楚，挖沟排水和筑坝拦水正把许多河流和沼泽地搞得一团糟。

I was well aware that draining and damming were making a mess of many rivers and wetlands.

youdao

干扰的基岩排水和径流的变化模式，这可能增加侵蚀率。挖沟是勘探活动，大部分干扰的基石。

Disturbance of the bedrock changes drainage and runoff patterns, which may increase the rate of erosion. Trenching is the exploration activity that most disturbs bedrock.

youdao