Research on the Life Cycle of Agricultural Products in China by Focusing on Water Supply Sources

我们对中国西北黑河流域的水平衡分析发现，约86%的农业用水来自蓝水。此外，还通过访谈调查，对主要农产品（玉米、蔬菜）的流通渠道和流通量进行了说明。以张掖市作为国家水资源管理体制改革的试点城市，分析了近10年来张掖市的土地利用变化和水资源平衡变化，以及当地农民对新的水资源管理体制的认识。因此，我们发现张掖市最近的水政策改革可能与政府的预期几乎不一致。农业企业新开垦的土地消耗（2。6×10^8m^3a^<-1>）比节约的水量（2. 0×10^8m^3a^<-1>）。新垦地地下水的大量开采加剧了地下水的衰减问题。我们的结论是，这是必要的，以促进工业结构的变化，向一个消耗较少的水。

Our water balance analysis focusing on the Heihe River basin of Northwestern China found that about 86% of total agricultural water use is derived from blue water. In addition, the distributions channels and amount of main produce including maize and vegetables were illustrated through interview survey. Based on the fact that Zhangye city was designated as one of the experimental sites of water policy reforms in China during the past decade, we analyzed the land/water use changes and consequent water balance change as well as local farmers' awareness of the new water management system. As a result, we found that recent water policy reforms in Zhangye City might barely conform to the government's expectations. The newly reclaimed land by agricultural enterprises consumes(2. 6×10^8m^3a^<-1>) more water than the amount saved(2. 0×10^8m^3a^<-1>) by local farmers through water policy reforms. Intensive groundwater use in the newly reclaimed land accelerates groundwater decline issue. We conclude that it is necessary to facilitate the industrial structural change towards one consuming less water.