Grey water footprint(GWF)is an important part of the water footprint.It is defined as the amount of water required to dilute pollutants.GWF is a valuable indicator that describes water pollution from the perspective of freshwater volume and has been widely studied by international academic communities.However,due to the lack of data and the limitation of the methodology system,GWF research cannot provide effective support for practical management.This study highlights the necessity of GWF assessment and related concepts,and reviews its latest achievements in the fields of GWF accounting method,application scope,evolution mechanism,and virtual water analysis based on the GWF.On this basis,the limitations of the current GWF calculation method and the improvement ideas are put forward.Meanwhile,in order to realize the deep application of GWF,this study discusses issues deserving further exploration and proposes research directions for GWF,including the improvement of the accuracy of GWF accounting method,the construction of high spatio-temporal resolution GWF database,the promotion of ecological compensation mechanism based on the pattern of physical-virtual grey water flows,and the promotion of GWF labeling system to guide the green transformation of production side through consumption side selection.
关键词
灰水足迹/水足迹/水污染/方法学改进/深度应用
Key words
grey water footprint/water footprint/water pollution/methodological improvement/deep application
维普
万方数据