scholarly journals Study on Initiation and Mechanism of Seepage-induced Slope Failure in Jianghan Plain, Central China

2021 ◽  
Author(s):  
Da-Peng Zhu ◽  
Jia-Mei-Hui Zhang ◽  
Lei He
Keyword(s):  
Slope Failure ◽  
Particle Migration ◽  
Central China ◽  
Gradient Force ◽  
Jianghan Plain ◽  
Seepage Erosion ◽  
Three Stages ◽  
Dem Model ◽  
Hydraulic Processes

Abstract The problem of seepage erosion is widespread in occurrence, but is rarely recognized as one of landslide causes. This paper describes and explains one event of slope erosion in Jianghan plain and is focused on the role of seepage erosion. The laboratory test is performed to reconstruct the hydraulic processes leading to slope failure with the application of different hydraulic loads. The observation and measurement reveal that slope alteration experienced three stages under seepage, and hydraulic gradient played a key role during seepage erosion phase. Using these results, a CFD-DEM model is developed to investigate how the seepage-induced soil particle migration would affect the slope evolution. The geotechnical properties control the failure processes and cause a significant change to the toe erosion and loosened zone. Although the instability of slope is mainly attributed to seepage gradient force, the occurrence of seepage erosion affects the failure mode. This work provides new guidance for hydrodynamic landslide prevention.

scholarly journals Reconstruction of river valley evolution before and after the emplacement of the giant Seymareh rock avalanche (Zagros Mts., Iran)

2019 ◽  
Vol 7 (4) ◽  
pp. 929-947 ◽  
Author(s):  
Michele Delchiaro ◽  
Marta Della Seta ◽  
Salvatore Martino ◽  
Maryam Dehbozorgi ◽  
Reza Nozaem
Keyword(s):  
Slope Failure ◽  
Rock Avalanche ◽  
Evolutionary Model ◽  
River Valley ◽  
Time To Failure ◽  
Stress Release ◽  
Seismic Triggering ◽  
Rock Creep ◽  
Before And After

Abstract. The Seymareh landslide, detached ∼10 ka from the northeastern flank of the Kabir-kuh fold (Zagros Mts., Iran), is recognized worldwide as the largest rock slope failure (44 Gm3) ever recorded on the exposed Earth surface. Detailed studies have been performed that have described the landslide mechanism and different scenarios have been proposed for explaining the induced landscape changes. The purpose of this study is to provide still missing time constraints on the evolution of the Seymareh River valley, before and after the emplacement of the Seymareh landslide, to highlight the role of geomorphic processes both as predisposing factors and as response to the landslide debris emplacement. We used optically stimulated luminescence (OSL) to date lacustrine and fluvial terrace sediments, whose plano-altimetric distribution has been correlated to the detectable knickpoints along the Seymareh River longitudinal profile, allowing the reconstruction of the evolutionary model of the fluvial valley. We infer that the knickpoint migration along the main river and the erosion wave propagation upstream through the whole drainage network caused the stress release and the ultimate failure of the rock mass involved in the landslide. We estimated that the stress release activated a mass rock creep (MRC) process with gravity-driven deformation processes occurring over an elapsed time-to-failure value on the order of 102 kyr. We estimated also that the Seymareh damming lake persisted for ∼3500 years before starting to empty ∼6.6 ka due to lake overflow. A sedimentation rate of 10 mm yr−1 was estimated for the lacustrine deposits, which increased up to 17 mm yr−1 during the early stage of lake emptying due to the increased sediment yield from the lake tributaries. We calculated an erosion rate of 1.8 cm yr−1 since the initiation of dam breaching by the Seymareh River, which propagated through the drainage system up to the landslide source area. The evolutionary model of the Seymareh River valley can provide the necessary constraints for future stress–strain numerical modeling of the landslide slope to reproduce the MRC and demonstrate the possible role of seismic triggering in prematurely terminating the creep-controlled time-to-failure pathway for such an extremely large case study.

Hydrogeochemistry and arsenic contamination of groundwater in the Jianghan Plain, central China

2014 ◽  
Vol 138 ◽  
pp. 81-93 ◽  
Author(s):  
Yiqun Gan ◽  
Yanxin Wang ◽  
Yanhua Duan ◽  
Yamin Deng ◽  
Xinxin Guo ◽  
...  
Keyword(s):  
Arsenic Contamination ◽  
Central China ◽  
Jianghan Plain

scholarly journals Accessibility of Rural Life Space on the Jianghan Plain, China: The Role of Livelihood

2021 ◽  
Vol 18 (3) ◽  
pp. 1301
Author(s):  
Rongrong Zhuo ◽  
Mark Rosenberg ◽  
Bin Yu ◽  
Xinwei Guo ◽  
Mingjie Wang
Keyword(s):  
Rural Households ◽  
Service Planning ◽  
Central China ◽  
Daily Activities ◽  
Rural Life ◽  
Jianghan Plain ◽  
Life Space ◽  
Mediation Effects ◽  
Rural Livelihood ◽  
The Relationship

This article aims to contribute to the relationship between accessibility of rural life space and rural livelihood capital and transitions in rural central China. Employing data produced from a household survey, we developed a composite index for accessibility of rural life space incorporating spatial and temporal attributes of a household’s daily activities and then explored the mediation effect of rural livelihood capital and transitions on accessibility. Results revealed a pattern of diversification in terms of life space accessibility undertaken for daily activities across households. Both livelihood capital and transitions had significant mediation effects on the relationship between socio-economic characteristics of rural households and accessibility of rural life space. The effects of livelihood capital on livelihood transitions also influenced the path on rural households’ accessibility of rural life space. One of the implications of this article is to link rural transformation to the context of urbanization and rural access issues from a perspective of daily activity, and then to figure out the best method for rural development policy and service planning.

How to survive in the age of artificial intelligence? Exploring the intelligent transformations of SMEs in central China

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jinqiang Wang ◽  
Yaobin Lu ◽  
Si Fan ◽  
Peng Hu ◽  
Bin Wang
Keyword(s):  
Artificial Intelligence ◽  
Small And Medium Enterprises ◽  
Policy Support ◽  
Central China ◽  
Limited Resources ◽  
Text Data ◽  
Content Type ◽  
External Pressures ◽  
Medium Enterprises

PurposeThe purpose of the research is to explore how small and medium enterprises (SMEs) in central China achieve intelligent transformation through the use of artificial intelligence (AI). Because of unequal resource allocation, constraints on the intelligent transformation of SMEs in central China are different from those in economically and technologically well-developed coastal provinces. Hence, the authors focus on SMEs in central China to identify drivers of and barriers to intelligent transformation.Design/methodology/approachThe interview data were collected from 66 SMEs across 20 industries in central China. To verify the validity of the data collection method, the authors used two methods to control for retrospective bias: multi-level informants and enterprises' AI project application materials (Wei and Clegg, 2020). The final data were validated without conflicts. Next, the authors cautiously followed a two-step approach recommended by Venkatesh et al. (2010) and used NVivo 11.0 to analyze the collected text data.FindingsSMEs in central China are enthusiastic about intelligent transformation while facing both internal and external pressures. SMEs need to pay attention to both internal (enterprise development needs, implementation cost, human resources and top management involvement) and external factors (external market pressure, convenience of AI technology and policy support) and their different impacts on intelligent transformation. However, constrained by limited resources, SMEs in central China have been forced to take a step-by-step intelligent transformation strategy based on their actual needs with the technological flexibility method in the short term.Originality/valueConsidering the large number of SMEs and their importance in promoting China's economic development and job creation (SME Bureau of MIIT, 2020), more research on SMEs with limited resources is needed. In the study, the authors confirmed that enterprises should handle “social responsibility” carefully because over-emphasizing it will hinder intelligent transformation. However, firms should pay attention to the role of executives in promoting intelligent transformation and make full use of policy support to access more resources.

Effect of a single bout of exercise and chronic exercise training on insulin sensitivity in racing sled dogs

2014 ◽  
Vol 10 (3) ◽  
pp. 167-172 ◽  
Author(s):  
S.E. Pratt-Phillips ◽  
R.J. Geor ◽  
M. Buser ◽  
A. Zirkle ◽  
A. Moore ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Exercise Training ◽  
Exercise Bout ◽  
Post Exercise ◽  
Exercise Challenge ◽  
Sled Dogs ◽  
Significant Difference ◽  
Single Bout ◽  
Three Stages

Two experiments were designed to investigate the role of exercise on insulin sensitivity (IS) in Alaskan racing sled dogs. In both experiments, IS was quantified with an isoglycemic-hyperinsulinemic clamp (IHC), whereby IS was defined as the glucose infusion rate (GIR) divided by the mean insulin concentration during the clamp. In Experiment 1, IS was quantified in 12 racing sled dogs during three stages of exercise training: unexercised for 4 months over the summer (deconditioned), and after two and four months of exercise conditioning. At each stage IS was assessed in unexercised dogs (n=6) and 60 h following a standard exercise challenge (n=6) consisting of a 35.4 km run completed in 2.5 h. In Experiment 2, IS was assessed in deconditioned dogs (n=6) and in well-conditioned dogs that had either completed a 708 km race 5-days prior (n=3) or were unraced for the previous month (n=3). In Experiment 1, there were no significant differences (Pã0.05) in GIR or IS between the three levels of conditioning, nor were there any effects of the exercise bout 60 h prior to the IHC. In Experiment 2 there was no significant difference in IS between well-conditioned dogs and untrained dogs (Pã0.05). However, dogs that completed a 708 km race 5-days prior to the IHC had a significantly higher IS than dogs that were deconditioned and those that were conditioned but unraced. These results suggest that the workload of an exercise challenge is a factor in post-exercise changes in IS but that exercise conditioning has little impact on IS in Alaskan sled dogs.

Seasonal variation of antibiotics concentration in the aquatic environment: a case study at Jianghan Plain, central China

2015 ◽  
Vol 527-528 ◽  
pp. 56-64 ◽  
Author(s):  
Linlin Yao ◽  
Yanxin Wang ◽  
Lei Tong ◽  
Yonggang Li ◽  
Yamin Deng ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Aquatic Environment ◽  
Central China ◽  
Jianghan Plain

The significant role of inorganic matters in preservation and stability of soil organic carbon in the Baoji and Luochuan loess/paleosol profiles, Central China

CATENA ◽  
2013 ◽  
Vol 109 ◽  
pp. 186-194 ◽  
Author(s):  
Chao Wang ◽  
Fuchun Li ◽  
Huanzhi Shi ◽  
Zhangdong Jin ◽  
Xuhui Sun ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Significant Role ◽  
Central China

scholarly journals PELATIHAN PENINGKATAN KAPASITAS PEMUDA DAN PEMBUATAN PROGRAM KERJA PADA ORGANISASI PEMUDA DESA CIBINUANG, KABUPATEN KUNINGAN

2018 ◽  
Vol 1 (02) ◽  
Author(s):  
Roni Nursyamsu
Keyword(s):  
Rural Communities ◽  
Community Service ◽  
Community Empowerment ◽  
Technical Training ◽  
Youth Organizations ◽  
Youth Organization ◽  
Service Activity ◽  
Three Stages ◽  
Village Government

The Community Service Activity / Kegiatan pengabdian kepada Masyarakat (PKM) was held in Cibinuang Village, Kuningan District, Kuningan Regency with the target of young people who are members of Karang Taruna Tunas Mekar as youth organization in Cibinuang Village. The problems faced by partner institution in this activity are: a) lack of socialization about the existence of youth organizations and their roles in the development of rural communities, b) less awareness and participation of youth in organizations, both administrator/ other members, c) training of administrators / members in making work programs have never been done. The method of implementation in this activity is active participation with stages namely 1). Seminar and discussing about the role of youth organizations, 2). Providing technical training in making organization programs, 3) Mentoring in making proposals. Seminar about the roles of youth organization for community empowerment in youth organizations in Cibinuang Village presented material in accordance with the theme. The materials presented to the participants including: the role of youth in village development, the mechanism for preparing programs and how to make proposals for effective funding requests. The training in making organization programs and activity proposals were divided into three stages, namely lectures and discussion about the role of youth organizations, providing technical training in the preparation of organization programs and making activity proposals, and mentoring in making organization programs and proposals.� Based on the process PkM activities, it can be seen that 1) there were enhancing youth's understanding and awareness of their capacity in developing villages through youth organizations, 2) members and administrators of youth organizations were motivated to play an active / participating role in building themselves and their villages, 3) administrators of youth organizations to arrange a program, 4) the management of the youth organization was able to make a proposal from each organization program that will be submitted to the Cibinuang Village Government.�Keywords: Youth Capacity, Youth Organization, Organization Program�AbstrakKegiatan Pengabdian Kepada Masyarakat (PKM) ini dilaksanakan di Desa Cibinuang Kecamatan Kuningan Kabupaten Kuningan dengan target pemuda-pemudi yang tergabung dalam Karang Taruna Tunas Mekar yang merupakan organisasi kepemudaan di tingkat Desa Cibinuang.� Permasalahan yang dihadapi oleh lembaga mitra dalam kegiatan ini yaitu: a) kurang tersosialisasikanya eksistensi organisasi pemuda dan perannya dalam pembangunan masyarakat desa, b) kesadaran dan partisipasi pemuda dalam organisasi baik pengurus/anggota kurang, c) pelatihan pada pengurus/anggota dalam membuat program kerja belum pernah dilakukan.� Metode pelaksanaan dalam kegiatan ini yaitu partisipasi aktif dengan tahapan yakni 1). Ceramah dan tanya jawab tentang peran organisasi pemuda, 2). Memberikan pelatihan teknis pembuatan program kerja, 3) Pendampingan dalam membuat proposal kegiatan. Seminar tentang peran organisasi pemuda untuk pemberdayaan masyarakat pada organisasi pemuda di Desa Cibinuang Kec. / Kab. Kuningan diisi dengan pemaparan materi yang sesuai dengan tema. Materi-materi yang disampaikan kepada peserta meliputi: peran pemuda dalam pembangunan desa, mekanisme penyusunan program kerja dan cara pembuatan proposal kegiatan untuk permintaan dana yang efektif. Pelatihan pembuatan program kerja dan proposal kegiatan dibagi menjadi tiga kegiatan, yaitu ceramah dan tanya jawab tentang peran organisasi pemuda, memberikan pelatihan teknis penyusunan program kerja dan pembuatan proposal kegiatan, dan pendampingan dalam membuat program kerja dan proposal kegiatan. Berdasarkan proses kegiatan Pengabdian Kepada Masyarakat dapat dilihat adanya 1) peningkatkan pemahaman dan kesadaran pemuda terhadap kapasitasnya dalam membangun desa melalui wadah organisasi pemuda, 2) anggota maupun pengurus organisasi kepemudaan termotivasi� untuk berperan aktif/berpartisipasi dalam membangun diri maupun desanya, 3) pengurus organisasi kepemudaan dapat menyusun program kerja, 4) pengurus organisasi kepemudaan mampu membuat proposal kegiatan dari setiap program kerja yang akan diajukan ke Pemerintah Desa Cibinuang.

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