What the reclaimed water use can change: From a perspective of inter-provincial virtual water network.
What the reclaimed water use can change: From a perspective of inter-provincial virtual water network.
复制标题
再生水利用可以改变什么：从省际虚拟水网络的角度。
DOI：
10.1016/j.jenvman.2021.112350
复制
发表时间：
2021-03
影响因子：
8.7
通讯作者：
Hang Qi;S. Zeng;Lei Shi;Xin Dong
中科院分区：
文献类型：
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作者：
Hang Qi;S. Zeng;Lei Shi;Xin Dong
再生水作为一种替代性水资源被用于各种经济活动，这就不可避免地涉及到虚拟水交易。然而，再生水对虚拟水贸易的影响尚未在以往的研究中进行评估。为了实现可持续水资源管理，本研究探讨了再生水利用对平衡省际水资源配置的效益。采用多区域投入产出分析和生态网络分析方法，研究了中国31个省（市、区）虚拟再生水网络（VRWN）的空间和结构特征，以及再生水利用的潜在效应。结果表明，虚拟再生水净输出流量与淡水净输出流量具有不同的空间格局，部分输入虚拟淡水的省份是虚拟再生水的输出省份。虽然开发关系是占主导地位的生态关系在VRWN（72%），它被证实，再生水的使用有助于平衡中国的虚拟水贸易的竞争关系（21%）比虚拟淡水网络（4%）。发达省份通过再生水利用，虚拟淡水消费量变化率下降10%以上。欠发达省份由于粮食出口量大，污水再生利用应用少，再生水利用效果不如发达省份明显。本文为认识当前虚拟水网络提供了新的视角，并为优化虚拟水贸易结构提供了指导。
Reclaimed water has been used as an alternative water resource for various economic activities, which inevitably is involved in the virtual water trade. However, the effect of reclaimed water on the virtual water trade has not been evaluated in previous studies. For the sake of sustainable water management, this study explored the benefits of reclaimed water use for balancing the water resource allocation at the interprovincial level. Multiregional input-output analysis and ecological network analysis were used to investigate the spatial and structural characteristics of the virtual reclaimed water network (VRWN) among 31 provinces in China and the potential effect of reclaimed water use. The results show that the net export flows of virtual reclaimed water have different spatial patterns from those of freshwater, some provinces that import virtual freshwater are exporters of virtual reclaimed water. Although the exploitative relationship is the dominant ecological relationship in the VRWN (72%), it is confirmed that reclaimed water use contributes to balancing the virtual water trade of China with a more competitive relationship (21%) than in the virtual freshwater network (4%). The virtual freshwater consumption change rate in developed provinces decreases by more than 10% through reclaimed water use. Due to the high food exports and low application of wastewater reclamation in less developed provinces, the effect of reclaimed water use in those provinces is not as obvious as that in developed provinces. This paper offers a new perspective for understanding the current VRWN and guidance for the optimization of the virtual water trade structure.