A paleo-hydrological simulation experiment and its verification in an inland basin

作     者：YuXin Zhang Yu Li XinZhong Zhang ChengQi Zhang WangTing Ye Yuan Liu 

作者机构：Key Laboratory of Western China's Environmental Systems(Ministry of Education)College of Earth and Environmental SciencesCenter for Hydrologic Cycle and Water Resources in Arid RegionLanzhou UniversityLanzhouGansu 730000China Key Laboratory of Ecohydrology of Inland River Basin/Gansu Hydrology and Water Resources Engineering Research CenterNorthwest Institute of Eco-Environment and ResourcesChinese Academy of SciencesLanzhouGansu 730000China 

出 版 物：《Research in Cold and Arid Regions》 (寒旱区科学（英文版）)

年 卷 期：2019年第11卷第4期

页      面：267-282页

核心收录：

学科分类：07[理学] 0705[理学-地理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 41822708 and 41571178) the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDA20100102) the Fundamental Research Funds for the Central Universities (Grant No. lzujbky-2018k15) the Second Tibetan Plateau Scientific Expedition (STEP) program (Grant No. XDA20060700) 

主　　题：SWAT model inland basin vegetation reconstruction runoff simulation mid-Holocene 

摘      要：Hydrological circulation,as the most basic material cycle and active natural phenomenon on earth,exerts a significant in fluence on climate change.The mid-Holocene is an important period to better understand modern environmental change;however,little research has focused on its quantitative simulation of paleo-hydrological process.In this research,we first collected chronological evidence and sediment records from six Holocene sedimentary sections in the Shiyang River Ba sin to reconstruct the mid-Holocene environment and terminal paleo-lake area.Secondly,we comprehensively analyzed modern pollen combinations and their propagation characteristics in surface soil,air,river and lacustrine sediments in the Shiyang River Basin,and combined the pollen records,as well as quantitatively reconstructed the millennial-scale vegeta tion zones.Finally,based on the land-cover adjustment results during the mid-Holocene,we successfully used the Soil and Water Assessment Tool(SWAT)model,a modern distributed hydrological watershed model,to simulate mid-Holocene runoff in the basin.Results show that the reconstructed climate in the basin was warmer and moister than that in recent times.Vegetation types in the mid-Holocene mainly consisted of sub-alpine shrub distributed between 2,550 m and 2,750 m,forest at an elevation of 2,550 2,750 m,steppe at an elevation of 1,550 2,150 m and desert steppe below 1,550 m.The up stream,midstream,downstream and average annual runoff of the mid-Holocene in the basin were 16.76×10^8 m^3,22.86×10^8 m^3,9.00×10^8 m^3 and 16.20×10^8 m^3 respectively,compared to 15.61×10^8 m^3 of modern annual runoff.Also,the area of terminal paleo-lake in the mid-Holocene was 628 km^2.Thus,this study provides a new quantitative method for paleo-hy drological simulation.