Results 21 to 30 of about 11,526,750 (181)

Ecological vulnerability assessment based on remote sensing ecological index (RSEI): A case of Zhongxian County, Chongqing

Frontiers in Environmental Science, 2023
The ecological vulnerability evaluation index was established through Normalized Difference Vegetation Index (NDVI), Wetness (WET), Normalized Difference Build-up and Soil Index (NDBSI) and Land Surface Temperature (LST) indicators, comprehensively ...
Guoxin Lan, Guoxin Lan, Xiaolan Jiang, Xiaolan Jiang, Denghui Xu, Denghui Xu, Xianhua Guo, Xianhua Guo, Yan Wu, Yixuan Liu, Yixuan Liu, Yuzheng Yang, Yuzheng Yang   +12 more
doaj   +1 more source

Sandstone Dynamical Characteristics Influenced by Water-Rock Interaction of Bank Slope

Advances in Civil Engineering, 2019
During the long-term reservoir operation, the seismic capability and dynamic response characteristics of the bank slope are of great importance to its safety evaluation content.
Huafeng Deng, Yinchai Zhang, Yongyan Zhi, Lingling Duan, Jianlin Li, Xushu Sun, Xiaoliang Xu   +6 more
doaj   +1 more source

Decadal loss of paddy fields driven by cumulative human activities in the Three Gorges Reservoir area, China

, 2020
Paddy fields are valuable agricultural land resources in the Three Gorges Reservoir area of China but have been threatened by the expansion and intensification of human activities over recent decades.
Tang, Q., Xiubin He, Khurram, D., He, X., Mingfeng Wang, Bao, Y., Yuhai Bao, Jinlin Li, Wang, M., Qiang Tang, Dil Khurram   +10 more
core   +1 more source

Research on the Influence of Moisture Condition on the Mechanical Properties and Microstructure of Sandstone

Shock and Vibration, 2021
The sandstone from the dry to saturated state shows obvious deterioration characteristics. Taking the sandstone of a slope in the Three Gorges Reservoir area as the research object, uniaxial/triaxial compression of sandstone samples with different water ...
Zuosen. Luo, Zuoxiang. Zhu, Hao Bai, Daxiang Liu, Qiancheng. Sun   +4 more
doaj   +1 more source

Mechanical response and energy dissipation law of double-fractured sandstone under dynamic load

Scientific Reports
To study the dynamic mechanical response and energy dissipation law of fractured sandstone, an SHPB device combined with a high-speed camera system was used to carry out impact compression tests with seven rock bridge angle specimens.
Qinghai Zhang, Xiaoliang Xu, Lihua Wu, Jianlin Li, Quan Shi, Delin Tan   +5 more
doaj   +1 more source

Dry cropland changes in China's Three Gorges Reservoir Region during the period 1990 to 2015

, 2020
Monitoring and analyzing changes in the extent of cultivated land may inform strategic decisions on issues of environmental and food security. The dry cropland area of 12000 km² in the Three Gorges Reservoir Region (TGRR) of China is essential for ...
Collins, A. L., Anjum, R., Tian, F., He, X., Bao, Y., Wang, M.   +5 more
core   +1 more source

Influence of initial stresses and stress paths on the deformation and failure mechanism of sandy slate

Scientific Reports
Rocks exhibit various mechanical properties under different stress conditions, with changes during unloading having significant implications for geological engineering safety.
Tianzhu Huang, Xiaoliang Xu, Lehua Wang, Jianlin Li, Jianwen Xu   +4 more
doaj   +1 more source

Analysis of Changes in the Micromorphology of Sandstone Joint Surface under Dry-Wet Cycling

Advances in Materials Science and Engineering, 2019
Changes in the micromorphology of joint surface under dry-wet cycling have a direct effect on the mechanical properties of the jointed rock masses, which in turn affects the deformation stability of the bank slope of a reservoir. In this study, we design
Jingcheng Fang, Huafeng Deng, Yu Qi, Yao Xiao, Hengbin Zhang, Jianlin Li   +5 more
doaj   +1 more source

Triple Porosity Model and Its Application for Coal Seam Gas Injection Displacement of CH4

Energy Science &Engineering, EarlyView.
(1)Compared with injecting CO2, injecting N2 has a shorter penetration time, but the CH4 flow rate takes longer to stabilize, meaning the displacement process lasts longer. (2)The flow rate of CH4 rapidly decreases and gradually approaches 0; the flow rates of N2 and CO2 are 0 before breakthrough, then increase rapidly and eventually stabilize.
Qingwei Zhang, Jianqing Xiao, Chunguang Zhang   +2 more
wiley   +1 more source

Dynamic thresholds driven by rainfall-landscape synergy for non-point source pollution control: A zonal management framework for the Three Gorges Reservoir Area

Ecological Indicators
Conventional, homogenous management, underpinned by static thresholds, is ill-equipped for non-point source (NPS) pollution control in heterogeneous watersheds. This study proposes a climate-adaptive paradigm to replace these inflexible thresholds.
Liuyi Zhang, Huaxin Ling, Peidang Fan, Xiao Ma, Bo Li, Chengtao Huang   +5 more
doaj   +1 more source