干旱区研究2024，Vol.41Issue(5)：776-787,12.DOI:10.13866/j.azr.2024.05.06
马莲河下游产水量时空演变特征
Spatiotemporal evolution of water yield in the lower Malian River Basin
摘要
Abstract
This study examines water yield patterns in the lower reaches of the Malian River Basin,which are typ-ical loess plateau gully areas in eastern Gansu Province,China.These areas are crucial for regional ecosystem health and understanding the temporal and spatial characteristics and response of water yield considering climate and land-use changes.Employing the Integrated Valuation of Ecosystem Services and Trade-offs(InVEST)mod-el,we quantitatively assess the spatial and temporal patterns of water yields across four years:1990,2000,2010,and 2020.Spatial heterogeneity in water yield across the lower reaches of the Malian River Basin was assessed using geographic detection techniques.Analysis revealed a fluctuating trend in total water yield from 1990 to 2020,characterized by an initial decrease,followed by an increase,and finally another decrease.Compared to 1990,total water yield in 2020 declined by 5.9×107 m3(25.43%reduction).Furthermore,spatial analysis revealed a distinct pattern in water yield distribution across the basin.Higher water yield was observed in the southern and marginal areas,whereas lower yield characterized the northern and central regions.Land-use type significantly in-fluenced water yield capacity.Ranked from highest to lowest,the order was as follows:construction land>bare land>agricultural land>low-coverage grassland>high-coverage grassland>shrub land>forest land>open water.More-over,a significant positive correlation was identified between water yield and precipitation,suggesting that pre-cipitation plays a key role in water production.Conversely,a negative correlation emerged between actual evapo-transpiration and altitude.Our analysis identified precipitation and actual evapotranspiration as the primary driv-ers of spatial variations and temporal changes in water yield,with q values ranging from 0.616 to 0.735 and 0.517 to 0.653,respectively.These findings provide valuable scientific evidence to support the development,utilization,and management of soil and water resources in the loess plateau of eastern Gansu.关键词
InVEST模型/产水量/时空演变/马莲河下游Key words
InVEST model/water yield/spatiotemporal evolution/lower Malian River Basin引用本文复制引用
高雅玉,宋玉,赵廷红,高金芳,何文博,李泽霞..马莲河下游产水量时空演变特征[J].干旱区研究,2024,41(5):776-787,12.基金项目
甘肃省重点研发计划项目(22YF7FA165) （22YF7FA165）
高端外国专家引进计划项目(22JR10KA006) （22JR10KA006）
甘肃省水利科学试验研究及推广计划项目(22GSLK006,22GSLK011,23GSLK007,24GSLK074) （22GSLK006,22GSLK011,23GSLK007,24GSLK074）
