摘要
以青海湖流域为研究区,基于1985—2020年8期土地利用图,结合地形、土壤和气象等数据,运用本地化修正后的InVEST模型及地理探测器方法,模拟流域产水服务、评估产水量空间分异特征、剖析其空间异质性归因。结果显示:青海湖流域1985—2020年产水量变化区间为11.68~81.52亿m^(3),变化趋势明显,表现为先下降后上升、再下降后上升的“W”型变化趋势;产水深度在空间分布上表现为东南高西北低,高值区均集中在海晏县内;垂直梯度上,产水能力随海拔增加而减弱;地理探测结果显示单因子对产水服务空间分异的解释能力存在显著差异,在不同分区中以气候类因子解释力最为显著;产水服务空间分异的影响程度由多因子共同决定,整体上以降水与实际蒸散量的交互作用解释力为主导因子。
The function of water production is an important manifestation of ecosystem service.Water resources and ecosystem have two-way influence.Dynamic identification of spatial differentiation characteristics and driving factors of water production service is of great significance to adjusting infrastructure allocation,optimizing water resources management and protecting regional ecosystem.Taking the Qinghai Lake Basin as the research area,based on the land use of the 8th phase of 1985—2020,combined with terrain,soil and meteorological data,the localized modified InVEST model and geographical detector method were used to simulate the basin water production service,evaluate the spatial differentiation characteristics of water yield,and analyze its spatial heterogeneity attribution.The results show that the change range of water yield in the Qinghai Lake Basin from 1985 to 2020 is 1.168 to 8.152 billion m^(3).The change trend is obvious,it is the"W"type change trend of falling first and then rising,and then rising after falling;The spatial distribution of water production depth is high in southeast and low in northwest,High-value areas are all concentrated in Haiyan County;On a vertical gradient,Water production capacity decreases with increasing altitude;Geodetection results showed significant differences in the ability of single factorial to explain spatial differentiation of water production services,In different partitions,the explanatory force of climate factors is the most significant;the influence degree of spatial differentiation of water production service is determined by multiple factors,and the interaction explanatory force of precipitation and actual evapotranspiration is the dominant factor.
作者
刘美娟
仲俊涛
王蓓
米文宝
Liu Meijuan;Zhong Juntao;Wang Bei;Mi Wenbao(School of Geography,Qinghai Normal University,Xining 810008,Qinghai,China;Key Laboratory of Natural Geography and Environmental Process of Qinghai Province,Xining 810008,Qinghai,China;School of Resources and Environment,Lanzhou University,Lanzhou 730000,Gansu,China;School of Geographic Science and Planning,Ningxia University,Yinchuan 750021,Ningxia,China)
出处
《地理科学》
CSSCI
CSCD
北大核心
2023年第3期411-422,共12页
Scientia Geographica Sinica
基金
国家自然科学基金项目(42001263)
青海省自然科学基金项目(2022-ZJ-906)资助。
作者简介
刘美娟(1996-),女,河南商丘人,硕士研究生,研究方向为遥感信息分析及地学应用。E-mail:l15937589665@163.com;通讯作者:仲俊涛。E-mail:zhongjuntao88@163.com。
