The Experts below are selected from a list of 57675 Experts worldwide ranked by ideXlab platform
Buli Cui - One of the best experts on this subject based on the ideXlab platform.
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stable isotope tracing of vadose zone water transport in achnatherum splendens grassland of the qinghai Lake Basin ne qinghai tibet plateau china
Catena, 2021Co-Authors: Baofu Jiang, Buli Cui, Ying Wang, Yaxuan Wang, Longsheng WangAbstract:Abstract The vadose zone serves as a connection and transformation link between the atmosphere, plants, soil, surface water and groundwater. It is considered to be an important component of the geosphere and has sensitive interactions with the hydrosphere, biosphere, and atmosphere, which greatly impacts the environment and human health. This study was conducted in the Achnatherum splendens grassland of the Qinghai Lake Basin, NE Qinghai–Tibet Plateau, China, and can provide references and guidance for research on the mechanisms governing the circulation and evolution of vadose-zone water in cold arid regions. Precipitation, dustfall, and vadose zone samples were collected to investigate transport in the vadose zone water using stable isotopes of hydrogen (δ2H) and oxygen (δ18O) as well as chloride as environmental tracers. The results showed that precipitation was the main source of chloride in the research area, accounting for 86.5% of total chloride deposition. The soil water in the vadose zone was mainly recharged by local precipitation. Strong evaporation occurred before the precipitation infiltrated and recharged soil water. The soil water, chloride content, and isotope values in the soil profile varied across different depths. The annual potential recharge from precipitation to the vadose zone soil water was 9.20 mm/yr, accounting for 2.17% of the local precipitation. The actual recharge from precipitation to groundwater was 26.29 mm/yr, accounting for 6.19% of the local precipitation. The infiltration recharge from preferential and piston flow accounted for 66.40% and 33.60% of the total infiltration recharge to groundwater, respectively, indicating that preferential flow was the main source of groundwater recharge in the studied grassland. The results of this study were compared with those of other relevant studies. The recharge mechanisms of the vadose zone soil water and groundwater varied between different regions and were controlled mainly by the spatiotemporal distribution of precipitation, topographic characteristics, and soil structure. These findings provide a reference and guidance for research on the circulation and evolution of vadose-zone water in the Qinghai Lake Basin and Qinghai–Tibet Plateau.
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Stable-isotope tracing of vadose-zone water transport in Achnatherum splendens grassland of the Qinghai Lake Basin, NE Qinghai-Tibet Plateau, China
'Elsevier BV', 2021Co-Authors: Jiang Bao-fu, Buli Cui, Wang Ying, Wang Ya-xuan, Li Dong-sheng, Wang Long-sheng, Li Xiao-yanAbstract:The vadose zone serves as a connection and transformation link between the atmosphere, plants, soil, surface water and groundwater. It is considered to be an important component of the geosphere and has sensitive interactions with the hydrosphere, biosphere, and atmosphere, which greatly impacts the environment and human health. This study was conducted in the Achnatherum splendens grassland of the Qinghai Lake Basin, NE Qinghai-Tibet Plateau, China, and can provide references and guidance for research on the mechanisms governing the circulation and evolution of vadose-zone water in cold arid regions. Precipitation, dustfall, and vadose zone samples were collected to investigate transport in the vadose zone water using stable isotopes of hydrogen (delta H-2) and oxygen (delta O-18) as well as chloride as environmental tracers. The results showed that precipitation was the main source of chloride in the research area, accounting for 86.5% of total chloride deposition. The soil water in the vadose zone was mainly recharged by local precipitation. Strong evaporation occurred before the precipitation infiltrated and recharged soil water. The soil water, chloride content, and isotope values in the soil profile varied across different depths. The annual potential recharge from precipitation to the vadose zone soil water was 9.20 mm/yr, accounting for 2.17% of the local precipitation. The actual recharge from precipitation to groundwater was 26.29 mm/yr, accounting for 6.19% of the local precipitation. The infiltration recharge from preferential and piston flow accounted for 66.40% and 33.60% of the total infiltration recharge to groundwater, respectively, indicating that preferential flow was the main source of groundwater recharge in the studied grassland. The results of this study were compared with those of other relevant studies. The recharge mechanisms of the vadose zone soil water and groundwater varied between different regions and were controlled mainly by the spatiotemporal distribution of precipitation, topographic characteristics, and soil structure. These findings provide a reference and guidance for research on the circulation and evolution of vadose-zone water in the Qinghai Lake Basin and Qinghai-Tibet Plateau
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runoff processes in the qinghai Lake Basin northeast qinghai tibet plateau china insights from stable isotope and hydrochemistry
Quaternary International, 2015Co-Authors: Buli CuiAbstract:Abstract Qinghai Lake is one of China's national nature reserves and supports the ecological security of the NE Qinghai-Tibet Plateau. More than half of the rivers flowing into Qinghai Lake are currently dry due to climate change and human activity. This study was designed to learn more about the causes of environmental problems in the Basin, using stable isotopes and hydrochemistry of Qinghai Lake Basin river water to explore runoff processes and their relationship with climate change. Results indicated that the river water was mainly fed by precipitation in the Basin, which has undergone weak evaporation. River discharges were generated mainly from the middle and upper Basin, due to high precipitation, low evapotranspiration, and alpine swamp land use/cover in those areas. River water in tributaries would experience relatively stronger evaporation than in the main stream. Main hydrochemical types of river waters were Ca2+-Mg2+- HC O 3 − , and river water chemistry was mainly controlled by carbonate weathering in the Qinghai Lake Basin. The effects of human activity on water chemistry were relatively mild in the Basin. The interaction between water and rocks was slighter in the river water than in the groundwater. River runoff was more sensitive to precipitation than to temperature. Lake level rises were closely related to increases in river runoff and precipitation. Conversely, Lake level declines were closely related to declines in river runoff and precipitation. Lake level could rise due to increasing precipitation and runoff in the future.
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characteristics of stable isotopes and hydrochemistry of river water in the qinghai Lake Basin northeast qinghai tibet plateau china
Environmental Earth Sciences, 2015Co-Authors: Buli CuiAbstract:The integrated use of isotopic and hydrochemical tracers is an effective way to investigate hydrological processes on a range of spatial and temporal scales. This study investigated stable isotopes and hydrochemistry of the river water in the Qinghai Lake Basin, and discussed relationships between runoff and variations of air temperature and precipitation. Results indicated that all of the river water points lie close to the local meteoric water line (LMWL); and the slope of local evaporation line of river water samples (6.82) was smaller than that of the LMWL (7.98), indicating that the river water mainly originated from the precipitation in the catchments which underwent weak evaporation. The river water in the tributaries would undergo relatively stronger evaporation than that in the main stream. The hydrochemical type of river water was Ca–Mg–HCO3, and the river water chemistry was mainly controlled by carbonate dissolution in the Qinghai Lake Basin. The river discharge was generated mainly from the middle and upper catchment. The runoff depths of Buha River Catchment and Shaliu River Catchment were 91.0 mm and 283.4 mm, respectively; and the runoff coefficients were 0.164 and 0.531, respectively. Because of a relatively longer channel, larger drainage area and smaller gradient, the surface water flowed more slowly and infiltrated more in the large river catchment; therefore, the runoff coefficient in the large river catchment was smaller than that in the relatively smaller catchment. The river runoff in the Qinghai Lake Basin was primarily influenced by precipitation. This study provides insights into the hydrological and geochemical processes of cold and alpine rivers, along with water resource management options in the Qinghai Lake Basin and northeast Qinghai-Tibet Plateau.
Longsheng Wang - One of the best experts on this subject based on the ideXlab platform.
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stable isotope tracing of vadose zone water transport in achnatherum splendens grassland of the qinghai Lake Basin ne qinghai tibet plateau china
Catena, 2021Co-Authors: Baofu Jiang, Buli Cui, Ying Wang, Yaxuan Wang, Longsheng WangAbstract:Abstract The vadose zone serves as a connection and transformation link between the atmosphere, plants, soil, surface water and groundwater. It is considered to be an important component of the geosphere and has sensitive interactions with the hydrosphere, biosphere, and atmosphere, which greatly impacts the environment and human health. This study was conducted in the Achnatherum splendens grassland of the Qinghai Lake Basin, NE Qinghai–Tibet Plateau, China, and can provide references and guidance for research on the mechanisms governing the circulation and evolution of vadose-zone water in cold arid regions. Precipitation, dustfall, and vadose zone samples were collected to investigate transport in the vadose zone water using stable isotopes of hydrogen (δ2H) and oxygen (δ18O) as well as chloride as environmental tracers. The results showed that precipitation was the main source of chloride in the research area, accounting for 86.5% of total chloride deposition. The soil water in the vadose zone was mainly recharged by local precipitation. Strong evaporation occurred before the precipitation infiltrated and recharged soil water. The soil water, chloride content, and isotope values in the soil profile varied across different depths. The annual potential recharge from precipitation to the vadose zone soil water was 9.20 mm/yr, accounting for 2.17% of the local precipitation. The actual recharge from precipitation to groundwater was 26.29 mm/yr, accounting for 6.19% of the local precipitation. The infiltration recharge from preferential and piston flow accounted for 66.40% and 33.60% of the total infiltration recharge to groundwater, respectively, indicating that preferential flow was the main source of groundwater recharge in the studied grassland. The results of this study were compared with those of other relevant studies. The recharge mechanisms of the vadose zone soil water and groundwater varied between different regions and were controlled mainly by the spatiotemporal distribution of precipitation, topographic characteristics, and soil structure. These findings provide a reference and guidance for research on the circulation and evolution of vadose-zone water in the Qinghai Lake Basin and Qinghai–Tibet Plateau.
Baofu Jiang - One of the best experts on this subject based on the ideXlab platform.
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stable isotope tracing of vadose zone water transport in achnatherum splendens grassland of the qinghai Lake Basin ne qinghai tibet plateau china
Catena, 2021Co-Authors: Baofu Jiang, Buli Cui, Ying Wang, Yaxuan Wang, Longsheng WangAbstract:Abstract The vadose zone serves as a connection and transformation link between the atmosphere, plants, soil, surface water and groundwater. It is considered to be an important component of the geosphere and has sensitive interactions with the hydrosphere, biosphere, and atmosphere, which greatly impacts the environment and human health. This study was conducted in the Achnatherum splendens grassland of the Qinghai Lake Basin, NE Qinghai–Tibet Plateau, China, and can provide references and guidance for research on the mechanisms governing the circulation and evolution of vadose-zone water in cold arid regions. Precipitation, dustfall, and vadose zone samples were collected to investigate transport in the vadose zone water using stable isotopes of hydrogen (δ2H) and oxygen (δ18O) as well as chloride as environmental tracers. The results showed that precipitation was the main source of chloride in the research area, accounting for 86.5% of total chloride deposition. The soil water in the vadose zone was mainly recharged by local precipitation. Strong evaporation occurred before the precipitation infiltrated and recharged soil water. The soil water, chloride content, and isotope values in the soil profile varied across different depths. The annual potential recharge from precipitation to the vadose zone soil water was 9.20 mm/yr, accounting for 2.17% of the local precipitation. The actual recharge from precipitation to groundwater was 26.29 mm/yr, accounting for 6.19% of the local precipitation. The infiltration recharge from preferential and piston flow accounted for 66.40% and 33.60% of the total infiltration recharge to groundwater, respectively, indicating that preferential flow was the main source of groundwater recharge in the studied grassland. The results of this study were compared with those of other relevant studies. The recharge mechanisms of the vadose zone soil water and groundwater varied between different regions and were controlled mainly by the spatiotemporal distribution of precipitation, topographic characteristics, and soil structure. These findings provide a reference and guidance for research on the circulation and evolution of vadose-zone water in the Qinghai Lake Basin and Qinghai–Tibet Plateau.
Sergio Ulgiati - One of the best experts on this subject based on the ideXlab platform.
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emergy based sustainability evaluation of erhai Lake Basin in china
Journal of Cleaner Production, 2018Co-Authors: Shaozhuo Zhong, Yong Geng, Hainan Kong, Bin Liu, Xu Tian, Wei Chen, Yiying Qian, Sergio UlgiatiAbstract:Abstract Rapid economic development has significantly degraded the environmental quality of Erhai Lake and its Basin. In order to assess the present sustainability of Erhai Lake Basin and suggest improvement options, this study builds an emergy-based framework, in which the whole Basin system comprises five sub-systems divided according to local economic structure and Lake functions, including Erhai Lake sub-system, Fishery sub-system, Agricultural sub-system, Industrial sub-system and Household sub-system. Moreover, emergy performances of Lake water consumption are analyzed considering the vital role of Lake water in the Basin development. The results of emergy-based indicators, e.g. EYR (1.31), ELR (60.98), ESI (2.15E-02) and support area SA(r) (1.56E+05 km2, about 60 times the actually available area), reveal that the whole Basin is far away from sustainable development. The key factor is the strong reliance on nonrenewable resources, especially in the form of purchased resources (76.48% of total emergy used). In particular, cement industry and transportation equipment industry within the industrial sub-system, as well as massive use of chemical fertilizers and pesticide in the agricultural sub-system, are the main contributors to the overall emergy inputs. e Regarding to water consumption, agriculture is the dominant sector by volume, but with a low use efficiency, while industrial water use has the largest environmental impact due to its high water quality requirement. Policy insights for improving the overall sustainability of Erhai Lake Basin are proposed, including adjusting industrial structure and promoting circular economy, facilitating green agriculture, improving water efficiency and increasing renewable energy use.
Yaxuan Wang - One of the best experts on this subject based on the ideXlab platform.
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stable isotope tracing of vadose zone water transport in achnatherum splendens grassland of the qinghai Lake Basin ne qinghai tibet plateau china
Catena, 2021Co-Authors: Baofu Jiang, Buli Cui, Ying Wang, Yaxuan Wang, Longsheng WangAbstract:Abstract The vadose zone serves as a connection and transformation link between the atmosphere, plants, soil, surface water and groundwater. It is considered to be an important component of the geosphere and has sensitive interactions with the hydrosphere, biosphere, and atmosphere, which greatly impacts the environment and human health. This study was conducted in the Achnatherum splendens grassland of the Qinghai Lake Basin, NE Qinghai–Tibet Plateau, China, and can provide references and guidance for research on the mechanisms governing the circulation and evolution of vadose-zone water in cold arid regions. Precipitation, dustfall, and vadose zone samples were collected to investigate transport in the vadose zone water using stable isotopes of hydrogen (δ2H) and oxygen (δ18O) as well as chloride as environmental tracers. The results showed that precipitation was the main source of chloride in the research area, accounting for 86.5% of total chloride deposition. The soil water in the vadose zone was mainly recharged by local precipitation. Strong evaporation occurred before the precipitation infiltrated and recharged soil water. The soil water, chloride content, and isotope values in the soil profile varied across different depths. The annual potential recharge from precipitation to the vadose zone soil water was 9.20 mm/yr, accounting for 2.17% of the local precipitation. The actual recharge from precipitation to groundwater was 26.29 mm/yr, accounting for 6.19% of the local precipitation. The infiltration recharge from preferential and piston flow accounted for 66.40% and 33.60% of the total infiltration recharge to groundwater, respectively, indicating that preferential flow was the main source of groundwater recharge in the studied grassland. The results of this study were compared with those of other relevant studies. The recharge mechanisms of the vadose zone soil water and groundwater varied between different regions and were controlled mainly by the spatiotemporal distribution of precipitation, topographic characteristics, and soil structure. These findings provide a reference and guidance for research on the circulation and evolution of vadose-zone water in the Qinghai Lake Basin and Qinghai–Tibet Plateau.
