Loess flow

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August undefined, 2024

Witryna14 kwi 2024 · The high sensitivity of loess slopes to water has been emphasized in many studies. However, it is still limited in terms of the understanding of slope morphological differentiation on the overall and local failure patterns in slopes, as well as on the acquisition method of hydrological dynamics. In this study, rainfall characteristics and … WitrynaHeadcut erosion is associated with major hydraulic changes induced by the gully head of concentrated flow. However, the variation in the hydraulic characteristics of the headcut erosion process is still not clear in the gully region of the Loess Plateau. A series of rainfall combined scouring experiments (flow discharges ranging from 3.6 to 7.2 ...

27 questions with answers in LOESS Science topic - ResearchGate

Witryna28 mar 2024 · In this paper, an algorithm based on an object-oriented method (OOA) has been developed to recognize loess landslides by combining spectral, textural, and morphometric information with auxiliary... WitrynaIn the Loess Plateau, the effects of run-on may be significant, because of the deep and loose surface soil layer. In this study, the role of run-on for overland flow in the Upper Wei River basin, located in the Loess Plateau, is evaluated by means of a simple numerical model at the hillslope scale. quaker valley football schedule 2018

Li Luo

Witryna1 lis 2013 · The loess flows initiated at the contact between loess and underlying clay and can travel a distance of more than 300 m at a speed of up to 5 m/s. Controlled by … Witryna8 kwi 2024 · High-intensity rainfall, over-irrigation of agricultural fields, and freeze–thaw cycles induce gradual groundwater infiltration within the upper loess layer, and this water flow generally overflows from slopes (Zhou et al. 2014). The same mechanism leads to pothole erosion and increases the chances of hillslope failure of the walls of gullies ... Witryna23 gru 2014 · Field investigations indicated that the loess flow-slides only occurred at a depth of <2 m, which corresponded to a surface layer of completely saturated loess … quaker valley foods warehouse

27 questions with answers in LOESS Science topic - ResearchGate

Witryna27 lis 2024 · Loess is very widely distributed, and the unsaturated hydraulic conductivity of loess is related to many engineering issues. To determine the unsaturated hydraulic conductivity of remoulded loess more conveniently and at a lower cost, filter paper test and soil column seepage test were carried out. Witryna22 gru 2024 · Loess flow slide are usually 1.5–3 m thick, while clayey flow slides can be 8–10 m thick. Study of the eroded landslide dams produced by the flow slides show that their volume can comprise up to 30% of the entire flow slide volume if it crosses the dammed valley, and up to 80% if the flow slide moves along the valley. ... quaker valley football 2022Witryna16 paź 2024 · The types of landslides include loess-bedrock planar slide, loess flow, loess flowslide, and loess slide . Several scholars have reported that rising groundwater levels aggravate the saturated area of loess and that the matrix suction inside a slope decreases under saturated water conditions [3,4]. quaker valley football roster

"WitrynaSoil erosion in sloping cropland is a major water and soil conservation issue in the Loess Plateau region, one of the main areas with sloping cropland in China. However, the effect of crop root systems, a major factor potentially influencing soil and water conservation in cropland, on farmland erosion, remains unclear. In the present study, soil erosion was … " - Loess flow

Loess flow

Landslides in a loess platform, North-West China SpringerLink

Witryna14 gru 2024 · The dry loess flowing on excavation face. After the loess with a large porosity ratio is immersed and saturated, the original structure of the loess Q3 and upper Q2 is destroyed largely by subjecting to collapsing deformation disturbance. When the deformation is caused by excavating, the loess structure will change further. Witryna1 kwi 2024 · Abstract. Loess flow slides can have catastrophic consequences and have, therefore, become a critical research topic in engineering geology. Recent …

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Witryna20 lis 2009 · The Yasman valley loess flow has some similarity with the 1994 Paez River flow, Colombia, formed by the coalescence of multiple earthquake-triggered debris flows (Calderon et al., 1997, Scott et al., 2001). In comparison, the volume of the Paez River flow has been estimated as 318 ... WitrynaLi Luo's 3 research works with 18 citations and 62 reads, including: Unique landslides (loess slide-flows) induced by an extreme rainstorm in 2024 on the Loess Plateau: A …

Witryna10 lut 2024 · A comprehensive understanding of the spatial distribution and dynamic changes of soil properties are the basis for sustainable land management. Topography and land use types are key factors affecting soil property variability. This study analyzed the effects of land use types and landscape locations on soil properties, based on … WitrynaPerched water table was significantly raised and resulted in many loess flow failures in the past 30 years. This type of landslide was often featured by long runout distance, high speed and recurrence. Laboratory tests along ICU and CSD stress paths were performed. It is shown that the loess has a strong strain-softening behavior and ...

Witryna21 kwi 2024 · The geologic environment, causes, movement process, movement mechanism, and disasters-causing characteristics of loess flow slides can contribute … WitrynaLoess slide-flows have become a new geological hazard and erosion process on the Loess Plateau. Loess slide-flows are a prominent ecological and environmental …

WitrynaThe semi-arid region of China’s Loess Plateau is characterized by fragile ecosystems and a shortage of water resources. The major natural forest type in this region is the …

Witryna17 lip 2013 · Detailed Description. Minnesota Valley Creek Ditch near Loess Bluffs National Wildlife Refuge flows through intensively row-cropped agricultural land. Find out more about this and other agricultural streams sampled by the USGS Midwest Stream Quality Assessment. quaker us historyWitryna18 lip 2024 · This paper studied the anti-seepage ability of the modified loess by using attapulgite, which is abundant in local areas. The possibility of using the modified loess as the sustainable compacted soil liner material in a solid waste landfill was also considered in this research. The materials were then evaluated using Nuclear … quaker valley football scoreWitryna18 paź 2024 · Therefore, loess mudflows have become a common geological disaster on the Chinese Loess Plateau. In order to study the initiation mode and mechanism of … quaker valley football stadiumWitryna1 lut 2024 · The experiments focused on the process and mechanism of loess erosion and the downstream movement of channel mudflow, so the flow rate, water level, and … quaker valley girls basketball scheduleWitryna22 lut 2011 · Loess flow failure. The clay underlying the loess acts as an impermeable layer at Heifangtai. Long-term irrigation has raised the perched water table … quaker valley girls soccerWitrynaLoess flow Rock dall Subsidence Debris flow/debris avalanche Mudflow Gambar 2. Pergerakan tanah sebagai fungsi dari kadar air dan kecepatan pergerakan (Abbot, 2004) quaker valley high school marching bandWitrynaThe Yellow River’s basin area is 752,443 km 2 (290,520 mi 2 ), containing about 200,000 km 2 (77,000 mi 2) of arable land and over 100 million people. The average flow rate of the Yellow River is 1,800 cubic meters per second. Its biggest tributary is the Wei River, which flows past Xi'an. The Upper Reaches of the Yellow River quaker valley high school sewickley pa