Key Laboratory of Aerosol Chemistry and Physics, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China.
State Key Lab of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710061, China.
Environ Sci Pollut Res Int. 2020 Aug;27(22):27926-27936. doi: 10.1007/s11356-020-09099-z. Epub 2020 May 13.
Recycled moisture, mainly originated from evapotranspiration (surface evaporation and transpiration), is the main sources of precipitation. Influenced on the different regional/local environments, the contributions of recycled moisture to precipitation present as different proportions. Recycled moisture has an important impact on the hydrological cycle, further occurred a series of environmental effect for regional/local. Aimed to estimate the contribution of recycled moisture to precipitation in an enclosed basin, Guanzhong Basin of northern China, precipitation and lake/reservoir samples were collected. The isotope ratio analysis was done for the summer season, and a three-component mixing model based on the stable hydrogen and oxygen isotopes was applied. The results indicated that the averaged contribution of recycled moisture to precipitation was 17.44% in Guanzhong Basin of northern China, while the mean proportions of surface evaporation moisture and transpiration moisture were found to be 0.38% and 16.97%, respectively. Comparatively, most of the recycled moisture mainly comes from transpiration moisture rather than evaporation moisture, suggesting that transpiration moisture from cropland, vegetation, and plants instead of evaporation is dominant in moisture recycling of the Guanzhong Basin.
再生水，主要来源于蒸散（地表蒸发和蒸腾），是降水的主要来源。受不同区域/局部环境的影响，再生水对降水的贡献呈现出不同的比例。再生水对水文循环有重要影响，进一步对区域/局部产生一系列环境影响。为了估算中国北方关中盆地封闭流域降水的再生水贡献，采集了降水和湖泊/水库样本。对夏季进行了同位素比分析，并应用了基于稳定氢和氧同位素的三组分混合模型。结果表明，中国北方关中盆地降水的再生水贡献平均为 17.44%，而地表蒸发水和蒸腾水的平均比例分别为 0.38%和 16.97%。相比之下，大部分再生水主要来自蒸腾水而不是蒸发水，这表明关中盆地的水分再循环中，主要来自农田、植被和植物的蒸腾水，而不是蒸发，这表明关中盆地的水分再循环中，主要来自农田、植被和植物的蒸腾水，而不是蒸发。
