translate Chinese into English1阐明了1970-2017年东江流域蓝绿水资源时空演变特征和降水-蓝绿水分配规律。平均蓝水深度为12408mm平均绿水深度8407mm流域水资源以蓝水为主占比601蓝水空间分布与降水基本一致绿水流和绿水储空间分布较蓝水均匀。流域蓝水和绿水储无明显变化绿水流呈显著下降趋势。枯水年、平水年和丰水年流域蓝水存在较大差异绿水流和绿水储在枯水年、平

This paper elucidates the temporal and spatial evolution characteristics of blue-green water resources and the allocation pattern of rainfall-blue-green water in the Dongjiang River Basin from 1970 to 2017. The average depth of blue water is 1240.8mm, and the average depth of green water is 840.7mm. The water resources in the basin are mainly composed of blue water, accounting for 60.1%. The spatial distribution of blue water is basically consistent with that of precipitation, while the distribution of green water flow and storage space is more uniform than that of blue water. There is no significant change in the blue and green water storage in the basin, but the green water flow shows a significant downward trend. There are significant differences in blue water in drought years, normal years, and flood years, while the differences in green water flow and storage are small. The green water coefficient in drought years (53.6%) is higher than that in flood years (29.9%), and the green water coefficient shows a decreasing trend from upstream to downstream. In drought years, about 53.6% of the annual available water resources in the basin are green water. This result is of great scientific significance for clarifying the evolution of blue-green water resources and the scientific utilization of green water resources under the influence of climate and land use changes in downstream areas.