During this past research season the scientists recorded unprecedented lake levels caused by higher glacial runoff .

科学家们在上一个科考季发现，受到高处冰川径流的影响，这里的湖泊水位上升到了前所未有的水平。

Phosphorus pollution comes from multiple sources , including fertilizer and manure that enter the water through runoff .

磷污染有多个来源，包括化肥和粪肥通过径流进入水源。

Differences in brightness in coastal area waters may be due to other factors , including freshwater runoff , strong currents , and water depth and clarity .

沿海水域的亮度差异可能是由于其他因素所导致，包括淡水径流，强劲的水流，水的深度以及清澈度。

Farmers then began conserving water by moving to drip irrigation and by leveling their fields with lasers to minimize wasteful runoff .

接下来，通过将农田灌溉方式改为滴流灌溉，使用激光平整土地以减少浪费径流等措施，农民开始有效地节约灌溉用水。

These opinions recognize that current farming methods bring serious environmental problems involving water supplies , fertilizer runoff and energy use .

这些观点认识到目前的农业生产方式会带来严重的环境问题，涉及水资源供应、肥料径流流失（runoff）和能源利用等。