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Accueil du site → Master → Chine → 2020 → Canopy Rainfall Interception Capacity and Its Influential Factors of Typical Grassland Communities in the Loess Hilly-gully Region

Académie chinoise des sciences (2020)

Canopy Rainfall Interception Capacity and Its Influential Factors of Typical Grassland Communities in the Loess Hilly-gully Region

杨全;

Titre : Canopy Rainfall Interception Capacity and Its Influential Factors of Typical Grassland Communities in the Loess Hilly-gully Region

Auteur : 杨全;

Grade : Master’s Theses 2020

Université : Académie chinoise des sciences

Résumé
The interception of vegetation canopy is an important hydrological process in the distribution of rainfall,and it is of great significance to clarify the canopy rainfall interception characteristics of grassland community and its influencing factors to reveal the environmental effects of ecological restoration.In this paper,three typical grassland vegetation communities(Bothriochloa ischaemum,Lespedeza davurica and Artemisia sacrorum)were selected as the research objects and three rainfall intensity(0.5,0.7 and 0.9 mm·min-1)was set up in the loess hilly-gully region.During June-September 2019,artificial rainfall and community plots were simulated,we have investigated the relationship between the characteristics of canopy rainfall interception in different grassland communities and the above-ground biomass,vegetation coverage,leaf area index,community diversity index,and rainfall characteristics of vegetation communities.The purpose of this study was to explore the effects of community characteristics and rainfall characteristics on rainfall interception capacity of grassland community canopy,so as to scientifically evaluate the influence of vegetation restoration on rainfall interception and its eco-hydrological effect in the Loess Hilly Region.The main results are as follows :(1)From June to September,the canopy rainfall interception capacity ranges of B.ischaemum communities,L.davurica communities and A.sacrorum communities were 0.58-0.75 mm,0.65-0.82 mm,and 0.69-0.87 mm,respectively,and the canopy rainfall interception rates are 7.88%-10.35%,8.85%-11.27%,and 9.39%-11.95%.From June to September,canopy rainfall interception capacity and interception rate of three grassland communities showed a trend of first increasing and then decreasing,and all reached the maximum values in August,which were 0.75 mm and 10.35%,0.82 mm and 11.27%,and 0.87 mm and 11.95%,respectively.In the four months,the intercessory capacity and intercessory rate of A.sacrorum communities were followed by L.davurica communities,and B.ischaemum communities was the smallest.

Mots clés : Canopy rainfall interception capacity; Grassland communities; Rainfall characteristics; Community characteristics; Simulation rainfall;

Présentation (CNKI)

Page publiée le 18 octobre 2020