Loess Geoheritage and Geohazard Protective Measures at Luochuan Loess National Geopark in NW China

Wang, Genlong; Ye, Wanjun; Yan, LV

doi:10.1007/s12371-019-00354-5

Cited by 21 publications

(11 citation statements)

References 20 publications

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“…As investigated, slope safety is mostly influenced by rainfall, causing the surface erosion to the slopes by runoff [28][29][30][31][32], weakening the slope soil strength while percolating into the slope body [33][34][35][36][37], and reducing the effective stress in the slope soil while saturating the slope body [38][39][40][41][42]. For the soil slope is loose, especially for the loess slopes, the raindrops and the runoff water can easily scour the soil particles on the slope surface, in due course forming gullies and fall-holes in the slopes [43]. To alleviate the scouring by rainwater runoff, the vegetation covering method and geobarrier system were proposed by some scholars, ascertaining that both methods are capable of protecting the soil slopes from rainwater scouring and maintaining the stability of the slopes [44].…”

Section: Introductionmentioning

confidence: 99%

Experimental Assessments of Treating Effect on Retaining Walls for Loess Slopes under Long‐Term Rainfall

Liu

Zhou

et al. 2021

Advances in Civil Engineering

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Failures of treated slope occurring in China are at a continually increasing rate, and the huge number of treated loess slopes is calling for a postevaluation; however, no mature technique is in place. Based on an actual loess slope in Shaanxi Province treated by retaining wall, indoor geotechnical and model tests were conducted, revealing the rainwater infiltration process and pressure variations behind the wall, and the processes were then adopted to perform the postevaluation of the treated slope. The results proposed that effectual measures hence needed to be taken so as to avert rainwater infiltrating along the wall face and back or flowing through the wall body, which can soften the soil of the slope bottom. Although the wet front was developed by the rainfall process, it cannot be used as the boundary between saturated and unsaturated areas. Despite the peculiarly large soil pressure upon the wall back at the top layer, the soil pressure increases to a large value and then decreases with the depth. The model test results and investigation results were used to conduct the postevaluation of the prototype slope, which formed a postevaluation frame relevant to other slope postevaluations.

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Section: Introductionmentioning

confidence: 99%

Experimental Assessments of Treating Effect on Retaining Walls for Loess Slopes under Long‐Term Rainfall

Liu

Zhou

et al. 2021

Advances in Civil Engineering

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“…Berdasarkan kajian terdahulu, peta yang dihasilkan dinamakan sebagai 'geotourist map' yang dijelaskan oleh geo sebagai maklumat geosains (geografi, geologi atau geomorfologi) manakala tourist sebagai pelancong atau aspek rekreasi yang tujuan pengunaan peta berkenaan . Peta lain yang berkaitan geotapak termasuk peta analisis dan pertindihan kepelbagaian geologi (Silva et al 2014) dan peta pengurusan bencana di kawasan pemuliharaan (Ovreiu et al 2019;Wang et al 2019). Kebanyakan peta awal yang dibangunkan oleh penyelidik ini memenuhi keperluan bukan pakar, memberikan komunikasi maklumat geosains dan integrasi maklumat tentang kemudahan dan perkhidmatan pelancongan.…”

Section: Pengenalanunclassified

“…Hanya beberapa peta geotapak yang dibangunkan di United Kingdom lebih bersifat menjawab keperluan pemuliharaan dan perancangan namun masih mengekalkan pendekatan pemetaan geologi asas mengikut kepelbagaiaan geologi yang dikenal pasti (Prosser et al 2006). Begitu juga dengan peta tindanan kepelbagaian geologi yang dibangunkan untuk tapak di Brazil (Silva et al 2014) dan pengurusan bencana di kawasan pemuliharaan yang sangat mengkhusus kepada pemantauan (Ovreiu et al 2019;Wang et al 2019).…”

Section: Pengenalanunclassified

Pemetaan Geotapak Pulau Ular di Langkawi, Malaysia

Mohamed¹,

Unjah²,

Ali³

et al. 2019

JSM

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Geosite mapping of Pulau Ular was conducted using remote sensing which includes data from topographic maps, aerial photograph, and satellite image as well as a photographs made by a drone. A geomorphological map was generated by remote sensing analysis. The next step was field work/observation to produce a geological map. Field observation identified 10 sites and localities with important and significant geological and landscape features for an understanding of the geological formation of this island such as rock, fossil, sedimentary structure, tectonic structure and erosion feature. Using all this information a geosite map of Pulau Ular was constructed and can be used in conservation planning and geotourism development.

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“…As revealed, slope safety is critically influenced by rainfall, leading to the surface erosion to the slopes by rainwater runoff [19][20][21][22][23] , degrading the slope soil strength as percolating into the slope [24][25][26] , and lessening the effective stress in the slope soil while saturating it [27][28][29][30][31] . As the loess slope is loose, the rain drops and the runoff water can easily scour the soil particles of the slope surface, forming fall-holes and gullies in the slopes 32 . To alleviate the scouring effect by rain-water, some scholars proposed the vegetation covering method and geobarrier system, and ascertained the effectiveness of the methods in protecting the soil slopes from rainwater scouring and maintaining the stability of the slopes 33 .…”

Section: Introductionmentioning

confidence: 99%

Post-Evaluation of Slope-Cutting on Loess Slopes Under Long-Term Rainfall Based on Model Test

Liu

Zhou

et al. 2021

Preprint

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Failures of treated slope occurring in China are at a consistently increasing rate, leaving the huge number of treated loess slopes calling for post-evaluation, however, no mature technique is in place. Depended on an loess slope in Shaanxi province treated by slope-cutting, indoor geotechnical and model tests were conducted, revealing the rainwater infiltration characteristics and pressure varying characteristics inside the slope, the results of which were then adopted to perform the post-evaluation of the treated slope. The results showed that the rainwater scouring effect on the loess slope surface attenuates gradually, and enters a steady stage after the first year of rainfall. The rainwater preferentially penetrates the platforms with gradually attenuating rates, however the wetting front can not be deemed as the boundary between the saturated and unsaturated areas, as the most parts of the model slope were indicated unsaturated by the pore water pressure sensors. Caused by the in-situ stress release, the soil pressures don’t increase but decrease sharply at the start of the rainfall. The displacements mainly occurs in the first two years of rainfall, following by steady periods. The model test results and investigation results were then used to conduct the post-evaluation of the prototype slope, which formed a post-evaluation frame relevant to other slope post-evaluations.

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Loess Geoheritage and Geohazard Protective Measures at Luochuan Loess National Geopark in NW China

Cited by 21 publications

References 20 publications

Experimental Assessments of Treating Effect on Retaining Walls for Loess Slopes under Long‐Term Rainfall

Experimental Assessments of Treating Effect on Retaining Walls for Loess Slopes under Long‐Term Rainfall

Pemetaan Geotapak Pulau Ular di Langkawi, Malaysia

Post-Evaluation of Slope-Cutting on Loess Slopes Under Long-Term Rainfall Based on Model Test

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