Dynamic variability of at-a-station hydraulic-geometry for mountain rivers in the southeast Qinghai-Tibet Plateau: The cases of Yalong River and upper Jinsha River

CATENA ◽  
2020 ◽  
Vol 194 ◽  
pp. 104723
Author(s):  
Chao Qin ◽  
Baosheng Wu ◽  
Yanjun Wang ◽  
Xudong Fu ◽  
Yuan Xue ◽  
...  
Keyword(s):  
Tibet Plateau ◽  
Hydraulic Geometry ◽  
Mountain Rivers ◽  
Jinsha River ◽  
Qinghai Tibet Plateau ◽  
Yalong River

scholarly journals Crustal and Upper Mantle Density Structure Beneath the Qinghai-Tibet Plateau and Its Surrounding Areas Derived from EGM2008 Geoid Anomalies

2016 ◽  
Author(s):  
Honglei Li ◽  
Jian Fang
Keyword(s):  
Upper Mantle ◽  
Initial Density ◽  
Density Model ◽  
Indian Plate ◽  
Tibet Plateau ◽  
Jinsha River ◽  
The Earth ◽  
Surrounding Areas ◽  
Geoid Anomalies ◽  
Qinghai Tibet Plateau

As the most active plateau on the Earth, the Qinghai-Tibet Plateau has a complex crust-mantle structure. Knowledge of the distribution of such a structure provides information for understanding the underlying geodynamic processes. We obtains a three-dimensional density model of crustal and upper mantle beneath Qinghai-Tibet plateau and its surrounding areas from the residual geoid anomalies using the Earth Gravitational Model (EGM) 2008. We estimate a refined density model by iterations, using an initial density contrast model. We confirm that the EGM2008 mission products can be used to constrain the crust-mantle density structures. Our major findings are: (1). At 300-400 km depth, high-D anomalies terminate around Jinsha River Suture (JRS) in the central TP, suggesting that the Indian plate has been reached over the Bangong Nujiang Suture (BNS) and almost reach to the JRS. (2). On the eastern TP, low-D anomalies at the depth of 0-300 km together with high-D anomalies at 400-670 km further verified the current eastward subduction of Indian plate. The ongoing subduction provides forces to the occurrences of frequent earthquakes and volcano. (3). At 600 km depth, low-D anomalies inside the TP illustrate the existence of hot weak material beneath there, contributing to the external material inward-thrusting.

Tradition, Habitat and Well-Being

2021 ◽  
pp. 1-22
Author(s):  
Zhi-nong Li ◽  
Shu-qing He
Keyword(s):  
Natural Environment ◽  
Good Life ◽  
Traditional Culture ◽  
Well Being ◽  
Cultural Relativism ◽  
Tibet Plateau ◽  
Jinsha River ◽  
Polygamous Marriage ◽  
River Region ◽  
Qinghai Tibet Plateau

Abstract The Tibetans who live among the valleys and mountains of the Jinsha River region, on the southeastern edge of the Qinghai–Tibet Plateau, still retain a considerable number of polygamous marriages. Through fieldwork in a Tibetan village, the authors discovered that polygamous marriage is a rational choice compatible with Tibetans’ traditional culture and natural environment, which can improve family well-being and lead to a good life. Our findings provide new fieldwork materials to support theories of cultural relativism advocated by the Boas school, which emphasises that the environment greatly affects culture, and Malinowski’s functionalism, which stresses that culture has been created to satisfy people’s practical needs.

scholarly journals Multiple Effects of Topographic Factors on Spatio-Temporal Variations of Vegetation Patterns in the Three Parallel Rivers Region, Southeast Qinghai-Tibet Plateau

2021 ◽  
Vol 14 (1) ◽  
pp. 151
Author(s):  
Chunya Wang ◽  
Jinniu Wang ◽  
Niyati Naudiyal ◽  
Ning Wu ◽  
Xia Cui ◽  
...  
Keyword(s):  
River Basin ◽  
Vegetation Cover ◽  
Vegetation Index ◽  
Vegetation Type ◽  
Tibet Plateau ◽  
Vegetation Patterns ◽  
Jinsha River ◽  
Topographic Factors ◽  
Significant Difference ◽  
Qinghai Tibet Plateau

Topographic factors are critical for influencing vegetation distribution patterns, and studying the interactions between them can enhance our understanding of future vegetation dynamics. We used the Moderate-resolution Imaging Spectroradiometer Normalized Differential Vegetation Index (MODIS NDVI) image dataset (2000–2019), combined with the Digital Elevation Model (DEM), and vegetation type data for trend analysis, and explored NDVI variation and its relationship with topographic factors through an integrated geographically-weighted model in the Three Parallel Rivers Region (TPRR) of southeastern Qinghai-Tibet Plateau (QTP) in the past 20 years. Our results indicated that there was no significant increase of NDVI in the entire basin between 2000–2019, except for the Lancang River basin. In the year 2004, abrupt changes in NDVI were observed across the entire basin and each sub-basin. During 2000–2019, the mean NDVI value of the whole basin increased initially and then decreased with the increasing elevation. However, it changed marginally with variations in slope and aspect. We observed a distinct spatial heterogeneity in vegetation patterns with elevation, with higher NDVI in the southern regions NDVI than those in the north as a whole. Most of the vegetation cover was concentrated in the slope range of 8~35°, with no significant difference in distribution except flat land. Furthermore, from 2000 to 2019, the vegetation cover in the TPRR showed an improving trend with the changes of various topographic factors, with the largest improvement area (36.10%) in the slightly improved category. The improved region was mainly distributed in the source area of the Jinsha River basin and the southern part of the whole basin. Geographically weighted regression (GWR) analysis showed that elevation was negatively correlated with NDVI trends in most areas, especially in the middle reaches of Nujiang River basin and Jinsha River basin, where the influence of slope and aspect on NDVI change was considerably much smaller than elevation. Our results confirmed the importance of topographic factors on vegetation growth processes and have implications for understanding the sustainable development of mountain ecosystems.

Legacy effect of warming on the heterotrophic respiration of alpine grassland on the Qinghai-Tibet Plateau

2021 ◽  
Vol 166 ◽  
pp. 104093
Author(s):  
Fei Peng ◽  
Wenjuan Zhang ◽  
Chimin Lai ◽  
Chengyang Li ◽  
Quangang You ◽  
...  
Keyword(s):  
Heterotrophic Respiration ◽  
Alpine Grassland ◽  
Tibet Plateau ◽  
Legacy Effect ◽  
Qinghai Tibet Plateau
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