基于InVEST模型的雅鲁藏布江流域土壤保持及影响因素研究  

Soil conservation and impacting factors in the Yarlung Zangbo River Basin based on the InVEST model

作　　者：格桑卓玛 王菲[1] 朱晓东[1] GE Sangzhuoma;WANG Fei;ZHU Xiaodong(School of Environment Nanjing University,Nanjing 210023,China)

机构地区：[1]南京大学环境学院,南京210023

出　　处：《环境保护科学》2025年第1期145-153,共9页Environmental Protection Science

摘　　要：基于InVEST泥沙输移比模块和地理探测器的方法,对雅鲁藏布江流域2000—2020年土壤保持进行时空演变特征和影响因子的评析。结果显示:2000、2010和2020年雅江流域单位面积土壤保持量分别为80 312.6、90 194.5和84 717.5 t/km^(2),多集中在雅江下游大峡谷附近,上和中游地区的土壤保持量年际变化不明显。土壤保持核心区以林地为主,裸地土壤保持功能最弱;随着海拔和坡度的递增,流域土壤保持量呈先上升后下降的倒“U”型趋势。植被覆盖度及年降雨量是影响流域土壤保持功能的主要因子,多年平均q值为0.46和0.43,表明流域水土治理工作中,应因地制宜实施植被建设,严控农业用地。Based on the InVEST sediment delivery ratio module and the method of geographical detector,the spatio-temporal evolution characteristics and influencing factors of soil conservation in Yarlung Zangbo River Basin during 2000 to 2020 were evaluated.The results showed that the soil conservation per unit area of the Yajiang River Basin in 2000,2010 and 2020 were 80312.6,90194.5 and 84717.5 t/km^(2),respectively,mostly concentrated in the vicinity of the Grand Canyon of the lower reaches of the Yajiang River,and the inter-annual changes of soil conservation in the upper and middle reaches of the river were not obvious.The soil conservation core area was mainly forest land,and the soil conservation function of bare land was the weakest.With the increase of elevation and slope,soil conservation in the basin showed an inverted U-shaped trend of first increasing and then decreasing.Vegetation coverage and annual rainfall were the main factors affecting the soil conservation function of the basin,and the annual average q value was 0.46 and 0.43,indicating that vegetation construction should be implemented according to local conditions and agricultural land should be strictly controlled in the work of water and soil management in the basin.

关 键 词：土壤保持 INVEST 泥沙输移比 地理探测器 雅鲁藏布江流域 

分 类 号：X321[环境科学与工程—环境工程] S157[农业科学—土壤学]