Nitrate in surface water

An excess of nutrients (e.g. nitrate and/or phosphate) in surface water can lead to excessive algal blooms, which, for example, significantly reduces visibility.地表水中营养盐（如硝酸盐和/或磷酸盐）过量可诱发大规模藻华，此类藻华会显著降低水体能见度。