The results indicate that the nitrate-N leakage loss under the root zone caused by fertilizer irrigation could creat the pollutionof shallow groundwater in Tangshan agricultural area.
计算结果表明，唐山农业区灌溉施肥引起根区以下硝态氮渗漏损失可造成浅层地下水的污染。
2
The heron is only distributed in eastern coast of Xiamen which had less human activity and pollution, and its intertidal zone was rocky and sandy.
厦门的岩鹭仅分布于东部海岸，该区域人为干扰和污染少，潮间带底质以砂砾、岩石为主。
3
Water environmental capacity of Danshui River of Jinyangkou Protection Zone is calculated and based on this, the pollution control methods are put forward.