Hydrological Processes in the Different Landscape Zones of Mafengou River Headwater Catchment in Alpine Cold Region
Studies on hydrological processes have always been an emphasis in the areas of resources and environment. This paper aims to identify the hydrochemical and hydrological processes in different landscape zones, based on the analysis of hydrochemistry of various samples including glacier-snow. frozen soil, groundwater and rainfall in the headwater catchment of Mafengou River in alpine cold region of northwest. Tracers indicate that the chemical compositions are typically characterized by Ca-HC03, Mg-Ca-S04, Ca-Mg-HC03 and Ca-Na-S04, respectively. Hydrogeochemical simulation using PHREEQC revealed different stream pathways and water-rock interaction processes. The end-members mixing model was employed for hydrograph separation. The result showed that Mafengou River were recharged by groundwater about 67％. which from infiltrated of frozen soil thawed water, glacier-snow meltwater and rainfall. Surface water in glacier-snow zone 11％. surface runoff in alpine cold desert zone 8％, and runoff in alpine meadow grassland zone about g％, directly recharge from rainfall 5％, respectively. This study suggests that rainfall hardly directly yield surface runoff, but mostly transformed into groundwater or interflow, finally concentrate into the river channel. This paper reveals the hydrological processes in different landscape zones, and provides a scientific basis for solving evaluation and management of water resource, etc.
Landscape zone Hydrological processes Hydrochemistry Alpine cold region
Yong-gang Yang Hong-lang Xiao Mao-xiang Zhou Lan-gong Hou Liang-ju Zhao Qiu Yang
Key Laboratory of Ecohydrology and River Basin Science, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou,Gansu 730000,China
国际会议
西安
英文
141-146
2010-10-11（万方平台首次上网日期，不代表论文的发表时间）