Spatial and Temporal Variability of Water Yield in Yellow River Valley and Attribution Analysis
Water yield simulation is the foundation of the classification of water conservation class,playing a crucial role in assessing regional ecosystem quality.In order to investigate the spatio-temporal pattern of water yield in the Yellow River valley and the driving force of human activities,this study simulated the actual water production in the Yellow River valley in 2000,2005,2010,2015 and 2020 respectively based on the InVEST model and the verification method of the improved water yield module.The spatial and temporal auto-correlation model and geographically time-weighted regression(GTWR)model were used to analyze the spatial and temporal characteristics of water yield and the impacts of human activities.The results show that during the 20-year period,the maximum regional water yield in the Yellow River valley could reach an annual aver-age of 881 mm and exhibited an"N"trend of change;the water yield spatial showed positive correlation,with the main spatial and temporal patterns being high-value aggregation in the southeast and low-value aggregation in the northwest;and all the human activities indicators boosted water yield in both directions,and the human activities were gradually transitioning to environmentally friendly practices.In summary,the study has resulted in the clarification of the spatial and temporal character-istics of water yield and the driving mechanism of human activities,which would serve as a basis for evaluating the ecological protection and promoting the high-quality development of the Yellow River valley.
water yieldIn VEST modelYellow River valleyhuman activityGTWR
万方数据
维普
