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Accueil du site → Doctorat → Chine → 2020 → Study on Typical Hydrological Characteristics of the Vadose Zone and Spatiotemporal Evolution of Potential Groundwater Recharge in the Chinese Loess Plateau

Northwest A&F University (2020)

Study on Typical Hydrological Characteristics of the Vadose Zone and Spatiotemporal Evolution of Potential Groundwater Recharge in the Chinese Loess Plateau

陆彦玮;

Titre : Study on Typical Hydrological Characteristics of the Vadose Zone and Spatiotemporal Evolution of Potential Groundwater Recharge in the Chinese Loess Plateau

Auteur : 陆彦玮;

Grade : Doctoral Dissertation 2020

Université : Northwest A&F University

Résumé partiel
Water resources are the basis of human survival and development.Understanding the current situation and evolution mechanism of regional water resources is the premise of effective regulation and sustainable development.The Chinese Loess Plateau has effective water resources,fragile ecological environment,and is extremely sensitive to climate and environmental change.In recent years,with the deep implementation of the project and the rapid development of regional economy and society,the land use and vegetation cover of the Chinese Loess Plateau have changed significantly,which has curbed soil erosion and reduced soil erosion.However,it is also faced the“new problem"with excessive consumption of water resources in the vadose zone and of whether the regional water resources carrying capacity and vegetation restoration intensity are balanced and sustainable.Therefore,it is very important to fully understand the potential groundwater recharge evolution under the natural state,analyze the temporal and spatial response mechanisms of the potential groundwater recharge,and better guide the regional water resource system planning and the sustainable development of the ecological environment,and realize the high-quality development of the Loess Plateau in the new era.Based on the obvious zonal characteristics of the climate and soil in the Chinese Loess Plateau,a lot of investigations and samplings are carried out on the soil properties and hydrological information in the vadose zone,and atmospheric chloride input.The soil bulk density,hydrological process and atmospheric chloride input in the typical vadose zone of the Chinese Loess Plateau are studied in depth by using a variety of spatiotemporal data analysis methods and multiple hydrological tracing techniques.The chloride tracer technology is developed to reveal and reconstruct the abundant information of hydrology and climate in the vadose zone of different climatic regions of the Chinese Loess Plateau.In order to make up for the lack of high-resolution hydroclimatic records in the Chinese Loess Plateau for nearly one thousand years,this paper discusses the evolution process of potential groundwater recharge and its response to climate change in the time dimension,and analyzes the distribution characteristics and main control factors of potential groundwater recharge in the spatial dimension.

Mots clés : deep vodase zone; soil bulk density; hydrological process; atmospheric chloride input; chloride tracer technique; potential groundwater recharge; hydroclimatic reconstruction;

Présentation (CNKI)

Page publiée le 5 juin 2021, mise à jour le 25 novembre 2021