Responses of vegetation yield to precipitation and reference evapotranspiration in a desert steppe in Inner Mongolia,China

作     者：LI Hongfang WANG Jian LIU Hu MIAO Henglu LIU Jianfeng LI Hongfang;WANG Jian;LIU Hu;MIAO Henglu;LIU Jianfeng

作者机构：Yinshanbeilu Grassland Eco-hydrology National Observation and Research StationChina Institute of Water Resources and Hydropower ResearchBeijing 100038China Institute of Water Resources for Pastoral AreaMinistry of Water ResourcesHohhot 010020China Inner Mongolia Hydraulic Research InstituteHohhot 010020China 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2023年第15卷第4期

页      面：477-490页

核心收录：

学科分类：090503[农学-草业科学] 0909[农学-草学] 08[工学] 0905[农学-畜牧学] 081501[工学-水文学及水资源] 09[农学] 0903[农学-农业资源与环境] 0815[工学-水利工程] 

基　　金：This research was supported by the Natural Science Foundation of Inner Mongolia Autonomous Region,China(2022QN04003) the Central Government to Guide Local Scientific and Technological Development(2021ZY0031) 

主　　题：precipitation reference evapotranspiration vegetation yield Copula functions desert steppe dry and wet events Inner Mongolia 

摘      要：Drought,which restricts the sustainable development of agriculture,ecological health,and social economy,is affected by a variety of *** is widely accepted that a single variable cannot fully reflect the characteristics of drought *** precipitation,reference evapotranspiration(ET_(0)),and vegetation yield can derive information to help conserve water resources in grassland ecosystems in arid and semi-arid *** this study,the interactions of precipitation,ET_(0),and vegetation yield in Darhan Muminggan Joint Banner(DMJB),a desert steppe in Inner Mongolia Autonomous Region,China were explored using two-dimensional(2D)and three-dimensional(3D)joint distribution *** types of Copula functions were applied to quantitatively analyze the joint distribution probability of different combinations of precipitation,ET_(0),and vegetation *** the precipitation–ET_(0)dry–wet type,the 2D joint distribution probability with precipitation≤245.69 mm/a or ET_(0)≥959.20 mm/a in DMJB was approximately 0.60,while the joint distribution probability with precipitation≤245.69 mm/a and ET_(0)≥959.20 mm/a was approximately ***,the joint return period that at least one of the two events(precipitation was dry or ET_(0)was wet)occurred was 2 a,and the co-occurrence return period that both events(precipitation was dry and ET_(0)was wet)occurred was 5 *** this condition,the interval between dry and wet events would be short,the water supply and demand were unbalanced,and the water demand of vegetation would not be *** addition,when precipitation remained stable and ET_(0)increased,the 3D joint distribution probability that vegetation yield would decrease due to water shortage in the precipitation–ET_(0)dry–wet years could reach up to 0.60–*** future work,irrigation activities and water allocation criteria need to be implemented to increase vegetation yield and the safety of water resources in the desert steppe of Inner Mongolia.