农田生态系统中重金属、硝酸盐等物质的迁移和分布是由土壤、土壤水、地表水与地下水多个过程联合实现的，它们彼此之间相互影响、相互联系。因此亟需加强数据采集能力；在要素研究中建立格局-过程-机制的研究体系；在区域研究中进行时间-空间转换、格局与过程耦合和区域差异与关联的分析。然而，水循环的复杂性决定了目前的研究仍集中于点、田间尺度。
   李发东研究团队自2010年起，通过大量区域上对黄河下游引黄灌区至黄河三角洲地区的调查采样，文献资料分析，建立黄河下游引黄灌区不同水体的理化数据库、同位素、硝酸盐、重金属物质数据库，进行地表水-地下水水质演化过程研究；借助于水化学和同位素等方法，解析了生态水文过程对农田生态系统物质运移的影响及其环境效应；进而从流域尺度层面解析黄河下游引黄灌区农田生态系统物质的分布格局-过程-机理；为评价农业对区域环境的影响提供了数据支撑。相关研究成果发表在Science of the Total Environment, Human and Ecological Risk Assessment, Water Science and Technology和国际水文协会论文集上。
该研究自然基金项目（41271047和41201514）的资助下完成。
  相关研究论文：
  1.Li Jing, Li Fadong*, Liu Qiang, Zhang Yan, Zhao Guangshuai. Trace metal pollution and its transfer in surface water and groundwater in a Yellow River alluvial fan: evidence from isotopes and hydrochemistry. Science of the Total Environment, 2014, 472, 979–988 (SCI收录, 二区)
  2.Li Jing, Li Fadong*, Liu Qiang, Zhang Yan, Zhao Guangshuai, Ouyang Zhu. Influence of long term fertilization on the crop production and soil quality on a new-born land: a case study in the Yellow River Delta in China. Agronomy Journal. 2014, 106(1): 143-151 (SCI收录,二区)
  3.Li Jing, Li Fadong*, Liu Qiang, Song Shuai, Zhang Yan, Zhao Guangshuai. Impacts of Yellow River irrigation practice on trace metals in surface water: a case study in the Henan-Liaocheng Irrigation Area, China. Human and Ecological Risk Assessment. 2014, 20(4): 1042-1057 (SCI收录)
  4.Li Jing, Li Fadong*, Song Shuai, Zhang Yan, Zhao Guangshuai, Liu Qiang. Spatial distribution and sources of dissolved trace metals in surface water of the Wei River, China. Water Science and Technology. 2013, 67(4): 817-823 (SCI收录)
  5.Shuai Song, Fadong Li*, Jing Li & Qiang Liu. Distribution and Contamination Risk Assessment of dissolved trace metals in surface waters in the Yellow River Delta. Human and Ecological Risk Assessment, 2013, 19:1514-1530 (SCI收录)
  6.Shuai Song, Xilai Zheng, Fadong Li*, Shoubo Tian, Guoqing Lin. Flood Routing Simulation and System Customization in a High Leakage River Channel in China. Journal of Hydraulic Engineering. 2013.139:656-663 (SCI收录)

附件: