Impacts of dams and land-use changes on hydromorphology of braided channels in the Lhasa River of the Qinghai-Tibet Plateau, China

2021 ◽  
Author(s):  
Yuchi You ◽  
Zhiwei Li ◽  
Peng Gao ◽  
Tiesong Hu
Keyword(s):  
Land Use ◽  
Land Use Changes ◽  
Tibet Plateau ◽  
Lhasa River ◽  
Qinghai Tibet Plateau

scholarly journals Land Use-Driven Changes in Ecosystem Service Values and Simulation of Future Scenarios: A Case Study of the Qinghai–Tibet Plateau

2021 ◽  
Vol 13 (7) ◽  
pp. 4079
Author(s):  
Yongkang Zhou ◽  
Xiaoyao Zhang ◽  
Hu Yu ◽  
Qingqing Liu ◽  
Linlin Xu
Keyword(s):  
Land Use ◽  
Global Climate Change ◽  
Global Climate ◽  
Land Use Changes ◽  
Tibet Plateau ◽  
Natural Development ◽  
Ecological Protection ◽  
Land Use Types ◽  
Bare Land ◽  
Qinghai Tibet Plateau

Global climate change and land use change arising from human activities affect the ecosystem service values (ESVs). Such impacts have increasingly become significant, especially in the Qinghai–Tibet Plateau (QTP). Major factors impeding the construction of China’s “ecological security barrier” are shifts in land-use patterns under rapid urbanization, irrational crop and animal husbandry activities, and tourism. In the present study, land use changes in the QTP in recent years were analyzed to determine their impacts on ESVs, followed by simulations of the interactive and evolutionary relationships between land use and ESVs under two scenarios: natural development scenarios and ecological protection scenarios. According to the results, the QTP land-use structure has a small change, and the main land use type is alpine grassland, followed by bare land and woodland. The stability of the major land use types is the key factor responsible for the overall increasing ESV trend. Different regions on the QTP had substantially varied ESVs. The northwest and southeast regions are mostly bare land, which is a concentrated area of low value of ecosystem services. A variety of land use types including grassland and woodland have been found in the humid and semi-humid areas of the central region, so the high value of ecosystem services is concentrated in this area to form a hot spot, with a Z value of 0.63–2.84. Simulations under the natural development and ecological protection scenarios revealed that land use changes guided by ecological policies were more balanced and the associated ESVs were relatively higher than those under the natural development scenario. Under a global climate change context, human activities on the QTP should be better managed. Sustainable development in the region could be facilitated by ensuring synchronization between resource availability and adopted socioeconomic activities.

Response of phosphorus fractions to land-use change followed by long-term fertilization in a sub-alpine humid soil of Qinghai–Tibet plateau

2018 ◽  
Vol 19 (3) ◽  
pp. 1109-1119 ◽  
Author(s):  
Xiaolei Sun ◽  
Meng Li ◽  
Guoxi Wang ◽  
Marios Drosos ◽  
Fulai Liu ◽  
...  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Phosphorus Fractions ◽  
Tibet Plateau ◽  
Qinghai Tibet Plateau

Ecological protection and restoration model of multi-ecological elements in Qinghai-Tibet Plateau: a case study of Lhasa River Basin

2019 ◽  
Vol 39 (23) ◽  
Author(s):  
王振波 WANG Zhenbo ◽  
李嘉欣 LI Jiaxin ◽  
郭义强 GUO Yiqiang ◽  
梁龙武 LIANG Longwu
Keyword(s):  
River Basin ◽  
Tibet Plateau ◽  
Ecological Protection ◽  
Lhasa River Basin ◽  
Lhasa River ◽  
Qinghai Tibet Plateau ◽  
Restoration Model

A Research on the Planning Strategy of Eco-Demonstration Zones in High Altitude Areas — a Case Study of Tanggula Town

2011 ◽  
Vol 368-373 ◽  
pp. 1632-1637
Author(s):  
Jin Wang ◽  
De Gang Duan ◽  
Jie Shen
Keyword(s):  
Land Use ◽  
High Altitude ◽  
Small Towns ◽  
Positive Influence ◽  
Living Environment ◽  
Tibet Plateau ◽  
Planning Strategy ◽  
Development Direction ◽  
Qinghai Tibet Plateau

The unruled development of construction land, along with the disordered planning and deteriorating living environment, etc. has long been prevalent in those small towns in the Qinghai- Tibet Plateau. This paper, thus, conducts some on-the-spot investigations and analyses of Tanggula town. The paper departs from the disparities between the current conditions of Tanggula town and the standards of eco- demonstration zone, proposing some strategies in the aspects of development direction, land use layout, facility layout, architecture and the town's features, aiming to exert positive influence upon the planning of small towns in plateaux.

scholarly journals Identification of Ecological Risk Zoning on Qinghai-Tibet Plateau from the Perspective of Ecosystem Service Supply and Demand

2021 ◽  
Vol 13 (10) ◽  
pp. 5366
Author(s):  
Wei Shi ◽  
Fuwei Qiao ◽  
Liang Zhou
Keyword(s):  
Land Use ◽  
Ecosystem Services ◽  
High Risk ◽  
Ecological Risk ◽  
Temporal Pattern ◽  
Supply And Demand ◽  
Tibet Plateau ◽  
Risk Areas ◽  
Spatio Temporal ◽  
Qinghai Tibet Plateau

With the interaction of global change and human activities, the contradistinction between supply and demand of ecosystem services in the Qinghai-Tibet Plateau is becoming increasingly tense, which will have a profound impact on the ecological security of China and even Asia. Based on land cover data on the Qinghai-Tibet Plateau in 1990, 2005, and 2015, this paper estimated the supply capacity of ecosystem services using the value equivalent method, calculated the demand for ecosystem services using population density and economic density, established an ecosystem risk index based on the idea of an ecosystem service matrix to reveal the spatio-temporal pattern of the supply and demand of ecosystem services in the Qinghai-Tibet Plateau, and identified the potential ecological risk areas arising from the imbalance between supply and demand. The results showed that: (1) In terms of the spatio-temporal pattern of land use change, the desert area of the Qinghai-Tibet Plateau decreased the most with 26,238.9 km2, and other types of land use increased, of which construction land increased by 131.7%; (2) In terms of the supply and demand of ecosystem services, the Qinghai-Tibet Plateau was mainly dominated by low-level surplus areas, accounting for 64.0%, and the deficit in some areas has worsened significantly; and (3) In terms of division pattern of ecological risk areas, the Qinghai-Tibet Plateau presented characteristics of high risk in the east and low risk in the west. The high-risk area accounted for 1.1%, mainly distributed in the Huangshui Valley and the “One River and Two Tributaries” (Yarlung Zangbo River, Lhasa River, Nianchu River). The research results can provide reference for ecosystem management and policy formulation of the Qinghai-Tibet Plateau and have important significance for realizing the coupling and coordinated development of human–land relationship in Qinghai-Tibet Plateau.

scholarly journals Natural and Political Determinants of Ecological Vulnerability in the Qinghai–Tibet Plateau: A Case Study of Shannan, China

2021 ◽  
Vol 10 (5) ◽  
pp. 327
Author(s):  
Yunxiao Jiang ◽  
Rong Li ◽  
Yu Shi ◽  
Luo Guo
Keyword(s):  
Land Use ◽  
Environmental Planning ◽  
Principal Component ◽  
Vulnerability Index ◽  
Tibet Plateau ◽  
Sudden Increase ◽  
Land Use Patterns ◽  
Landsat Images ◽  
Ecological Vulnerability ◽  
Qinghai Tibet Plateau

Changing land-use patterns in the Qinghai–Tibet Plateau (QTP) due to natural factors and human interference have led to higher ecological vulnerability and even more underlying issues related to time and space in this alpine area. Ecological vulnerability assessment provides not only a solution to surface-feature-related problems but also insight into sustainable eco-environmental planning and resource management as a response to potential climate changes if driving factors are known. In this study, the ecological vulnerability index (EVI) of Shannan City in the core area of the QTP was assessed using a selected set of ecological, social, and economic indicators and spatial principal component analysis (SPCA) to calculate their weights. The data included Landsat images and socio-economic data from 1990 to 2015, at five-year intervals. The results showed that the total EVI remains at a medium vulnerability level, with minor fluctuations over 25 years (peaks in 2000, when there was a sudden increase in slight vulnerability, which switched to extreme vulnerability), and gradually increases from east to west. In addition, spatial analysis showed a distinct positive correlation between the EVI and land-use degree, livestock husbandry output, desertification area, and grassland area. The artificial afforestation program (AAP) has a positive effect by preventing the environment from becoming more vulnerable. The results provide practical information and suggestions for planners to take measures to improve the land-use degree in urban and pastoral areas in the QTP based on spatial-temporal heterogeneity patterns of the EVI of Shannan City.

Soil quality evaluation of the alluvial fan in the Lhasa River Basin, Qinghai-Tibet Plateau

CATENA ◽  
2022 ◽  
Vol 209 ◽  
pp. 105829
Author(s):  
Tongde Chen ◽  
Juying Jiao ◽  
Ziqi Zhang ◽  
Hong Lin ◽  
Chunjing Zhao ◽  
...  
Keyword(s):  
Soil Quality ◽  
River Basin ◽  
Quality Evaluation ◽  
Alluvial Fan ◽  
Tibet Plateau ◽  
Lhasa River Basin ◽  
Lhasa River ◽  
Qinghai Tibet Plateau
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