水力发电学报2024，Vol.43Issue(6)：63-74,12.DOI:10.11660/slfdxb.20240607
黄河源区下垫面变化对水文过程的影响
Impact of underlying surface changes on hydrological process in source area of Yellow River
摘要
Abstract
Quantitative assessment of the impact of underlying surface changes on water balance components is of great significance for revealing the attribution of runoff changes in the source region of the Yellow River(SRYR).This study simulates the relationship between precipitation and runoff under underlying surface changes,using a variable infiltration capacity(VIC)model considering dynamic land use/cover change(LUCC)and leaf area index(LAI)change.The results show this model improves the simulations of the SRYR hydrological process through considering the dynamic evolution of the underlying surface,achieving a relative error reduction of 8.8%-12.9%.From 2001 to 2018,the combined effects of LAI and LUCC led to an average annual increase of 15%in plant transpiration,while the runoffs at Maqu and Tangnaihai were decreased by 7.17%and 9.19%,respectively.The impact of LAI on runoff was more significant than that of LUCC.The average annual contributions of LAI to these two runoffs were-4.80%and 4.48%,respectively,while those of LUCC were 0.16%and-3.15%.The study explains the changes in underlying surfaces are the cause of insignificant changes in runoff under increasing precipitation in SRYR,and deepens our understanding of the hydrological responses to climate change and ecological protection.关键词
可变下渗容量模型/土地覆被/叶面积指数/黄河源区/径流模拟Key words
variable infiltration capacity model/land cover/leaf area index/source region of the Yellow River/runoff simulation分类
地球科学引用本文复制引用
韩璐,魏加华,侯铭垒,侯胜玲..黄河源区下垫面变化对水文过程的影响[J].水力发电学报,2024,43(6):63-74,12.基金项目
国家自然科学基金(U2243232) （U2243232）
国家重点研发计划(2022YFC3202400) （2022YFC3202400）
青海省重大科技专项(2021-SF-A6) （2021-SF-A6）
