山西省汾河流域植被恢复对蒸散发的影响

Effects of Vegetation Restoration on Evapotranspiration in Fenhe River Basin of Shanxi Province

为了揭示汾河流域植被恢复后对区域蒸散发的影响,分析了汾河流域不同森林尺度蒸散发系数,计算了植被恢复对汾河流域蒸散发的影响。结果表明:林地蒸散发系数与林地的尺度规模有关,太谷均衡实验站林地的面积较小,平均蒸散发系数达1.257;流域内森林区蒸散发系数平均为0.666,灌木林区平均蒸散发系数为0.711。汾河流域新增森林面积5 695 km2,可减少蒸散发量49 353万m3,新增灌丛面积903 km2,可减少蒸散发量1 819万m3。研究成果对于山西汾河流域生态恢复治理具有一定的参考价值。

In order to reveal the influence of vegetation restoration on regional Evapotranspiration in Fen River Basin, the evapotranspiration coefficients of different forest scales in Fen River Basin were analyzed, and the impact of vegetation restoration on evapotranspiration in Fen River Basin was calculated in this paper. The results show that the evapotranspiration coefficient of forest land is related to the scale of forest land. The forest area of Taigu balance experimental station is small and the average evapotranspiration coefficient reached 1. 257. The average evapotranspiration coefficient of forest area is 0. 666 and 0. 711 for the shrub area. The new increased forest area of Fen River Basin is 5 695 km2, which can reduce the evapotranspiration by 493 million 530 thousand m3. The new increased shrub area is 903 km2, which can reduce the evapotranspiration by 18 million 190 thousand m3. The research results have certain reference value for the ecological restoration and management in Fen River Basin of Shanxi province.