黑白河流域湿地水文蓄调功能量化及对比研究OA北大核心CSTPCD

[Objective]The Hei River and the Bai River,both belong to the first level tributaries of the upper Yellow River in the Zoige Plateau,are representative in comparative studies of alpine wetland hydrology.[Methods]Based on the water balance method,the SWAT model was used to simulate the mountainous discharge as the horizontal recharge to wetlands in the plain area of the two river basins.Combined with the vertical hydrological analysis of local precipitation and evaporation,dynamics of the alpine wetlands water storage was quantified.By coupling with the wetlands static water storage calculated according to the soil hydro-physical properties,the inter-annual variation of water conservation and regulation functions were estimated.[Results]During the time period from 2001 to 2015,wetland water storage in the Hei River Basin(HRB)increased with a cumulative volume of 19.48×108 m3;while that in the Bai River Basin(BRB)reduced with a cumulative volume of 23.08×108 m3.Capaci-ties of wetland static water storage was calculated with volumes of 20.06×108 m3 and 4.59×108 m3 in the HRB and the BRB,respectively.Water storage capacity of the peat swamp soil was found the largest,while that of the permafrost soil,the smallest.During the statistic time period,wetland water conservation index showed a decreasing trend in the two basins,while the ampli-tude in the HRB presented with more remarkable.[Conclusion]The result show that the SWAT model was evidenced with a sat-isfactory precision in mountainous discharge simulations in the HRB and the BRB.During the statistic time period,wetland water storage in the HRB increased while that in the BRB reduced.Soil types of the wetland,together with its size in area,are key fac-tors influencing capacities of static water storage.Wetland water conservation and regulation function declined in the HRB and BRB.The study could provide data and method support for the water conservation and regulation function's maintaining of the alpine wetlands.