Headcut Erosion Process in Stratified Soil Layer of Flood Plain

2001 ◽  
Author(s):  
Ashis Kumar Dey ◽  
Tetsuro Tsujimoto ◽  
Tadanori Kitamura
Keyword(s):  
Soil Layer ◽  
Flood Plain ◽  
Erosion Process ◽  
Headcut Erosion

scholarly journals Role of the Biological Processes in Soil forming Process and Soil Fertility (Azerbaijan, Shamakhy)

2019 ◽  
Vol 3 (2) ◽  
Keyword(s):  
Soil Fertility ◽  
Soil Layer ◽  
Morphological Structure ◽  
Soil Formation ◽  
Plant Residues ◽  
Agricultural Activity ◽  
Erosion Process ◽  
Forming Process ◽  
Object Of Study ◽  
The Impact

The article discusses the impact of the erosion process on mountain black terrestrial, suitable for planting soils widespread in the Shamakhi region of Azerbaijan, which are more or less subject to erosion, which impairs its fertility, weakens fertility etc. It should be recognized that the influence of agricultural activity of man on the processes taking place in the soil is a deeply studied problem. What contributed to the negligence of the soil, its incorrect and irrational use which weaken its fertility, change the normal direction of the process of soil formation? According to the latest data, more than 50% of the soils of the Shamakhi region are subject to the process of water and irrigation erosion, a process that is widely distributed mainly in mountain black-terrestrial. According to well-known scientists of the republic, it was found that substances synthesized by microorganisms that regulate the complex processes occurring in the soil. For example, the conversion of plant residues and organic substances into humus takes place under the influence of complex environmental factors, which impairs its fertility. This was compared to our study of the dynamics of microbiological activity in black mountain soils and the effect of erosion on it at the object of study. As you know, humus is the basis of soil fertility. For this reason and in the process of research, the factors that form the soil were the focus of genetic science on soil. The results of the study proved that the erosion process, which occurred in nature, possessing a huge potential for its destructive power, destroys the surface fertile soil layer, cancels its fertility and, therefore, removes soil from agricultural circulation. Being a dynamic process, it changes the appearance of a zone, as a rule, a landscape that is widely distributed in the mountainous and foothill zones of the region. This is the reason for the change of the initial relief in the morphological structure and mountain landscapes.

scholarly journals Response of the headcut erosion process to flow energy variation in the loess gully region of China

2020 ◽  
Author(s):  
Qianhua Shi ◽  
Wenlong Wang ◽  
Mingming Guo ◽  
Zhuoxin Chen ◽  
Lanqian Feng ◽  
...  
Keyword(s):  
Erosion Process ◽  
Flow Energy ◽  
Energy Variation ◽  
Headcut Erosion

CHANNEL AND FLOOD-PLAIN MORPHOLOGY AND ITS IMPACT ON CHANNEL AND FLOOD-PLAIN STREAMS

2015 ◽  
pp. 67
Author(s):  
A. O. Pagin ◽  
N. B. Baryshnikov ◽  
E. V. Pol'tsina ◽  
T. S. Selina
Keyword(s):  
Flood Plain ◽  
Plain Streams

Preliminary results of the study on the reasons of the Hai Hau erosion phenomenon

2007 ◽  
Vol 29 (3) ◽  
pp. 415-426
Author(s):  
Pham Van Ninh ◽  
Phan Ngoc Vinh ◽  
Nguyen Manh Hung ◽  
Dinh Van Manh
Keyword(s):  
Mathematical Modeling ◽  
Historical Data ◽  
Middle Part ◽  
Red River ◽  
Erosion Process ◽  
Red River Delta ◽  
The North ◽  
Severe Erosion ◽  
North And South ◽  
Very High

Overall the evolution process of the Red River Delta based on the maps and historical data resulted in a fact that before the 20th century all the Nam Dinh coastline was attributed to accumulation. Then started the erosion process at Xuan Thuydistrict and from the period of 1935 - 1965 the most severe erosion was contributed in the stretch from Ha Lan to Hai Trieu, 1965 - 1990 in Hai Chinh - Hai Hoa, 1990 - 2005 in the middle part of Hai Chinh - Hai Thinh (Hai Hau district). The adjoining stretches were suffered from not severe erosion. At the same time, the Ba Lat mouth is advanced to the sea and to the North and South direction by the time with a very high rate.The first task of the mathematical modeling of coastal line evolution of Hai Hau is to evaluate this important historical marked periods e. g. to model the coastal line at the periods before 1900, 1935 - 1965; 1965 - 1990; 1990 - 2005. The tasks is very complicated and time and working labors consuming.In the paper, the primarily results of the above mentioned simulations (as waves, currents, sediments transports and bottom - coastal lines evolution) has been shown. Based on the obtained results, there is a strong correlation between the protrusion magnitude and the southward moving of the erosion areas.

Impact Assessment of Dynamic Characteristics on the Hydraulic Driven Machinery Operation

2018 ◽  
pp. 1-12
Author(s):  
A. D. Terenteva
Keyword(s):  
Dynamic Error ◽  
Total Error ◽  
Soil Layer ◽  
Hydraulic Drive ◽  
Hydraulic Cylinder ◽  
Working Mechanism ◽  
Automated Control ◽  
Vertical Coordinate ◽  
Construction Machinery ◽  
The Difference

In civil engineering in Russia, trenching for utilities is currently under digging. To perform such works, it is necessary to use high-precision construction machinery, because inaccurate performance of works can lead to the break down of existing utilities, thereby affecting the residents of nearby houses and demanding the additional works for renewal.The most universal labour saver to perform construction works is hydraulic driven single-bucket excavators, which provide up to 38% of works. Therefore, to improve technical characteristics that affect the accuracy of the work performed is an important task.High requirements for the performance of works are defined by existing construction regulations: an allowable soil layer to remain is at most 0.05 m. To fulfil such requirements, an exact assessment of the working mechanism position and a trench profile is necessary.Examination of a manually operated digging process shows that an operator provides operations untimely, however an automated control system can solve this problem. Dynamic phenomena in the working mechanism have the greatest impact on the accuracy of the works performed.To assess the bucket digging edge position accuracy, a mathematical model of the working mechanism has been created. Based on the cycle scheme of the working process, the excessive displacements of the hydraulic cylinder rods under the load are taken into account. By the end of the cycle, the difference between the specified and obtained positions along the vertical coordinate has been 0.0892 m.A dynamic error of the hydraulic drive system of the working mechanism is considered as a sum of the error due to excessive displacements of the hydraulic cylinder rods and the error due to delay of the hydraulic drive, with the latter being calculated for the average time of delay taking into account the data available in the literature. The total error of the bucket digging edge position of the working mechanism is 0.1176 m, which is 2 times more than the value of 0.05 mConformity of all the links with specification requirements does not guarantee compliance with the required displacement accuracy of the bucket digging edge, and, thus, the soil layer to remain in the base of the trench can exceed the regulated value of 0.05 m.

INVESTIGATION OF EROSION RESISTANCE OF GRAY-BROWN SOILS IN THE SOUTHEASTERN SLOPES OF THE GREATER CAUCASUS

2020 ◽  
pp. 47-49
Author(s):  
Aliyev Z.H.
Keyword(s):  
Erosion Resistance ◽  
Preventive Measures ◽  
Chemical Properties ◽  
Anthropogenic Factors ◽  
Erosion Process ◽  
Greater Caucasus ◽  
Sloping Lands ◽  
Set Up ◽  
Physical And Chemical ◽  
And Chemical Properties

In recent years, sharp changes have occurred in the state of sloping lands of Azerbaijan. There was tension from the influence of the anthropogenic factors on the mountain slopes. The fact that the erosion process is rein-forced in the research site. Due to lack of agrotechnical measures on the slopes erosion process has been strength-ened, soil flooded with soil, physical and chemical properties of the soil have deteriorated, nutritional elements are reduced, vegetation is reduced and destruction limit. For some reason, the purpose of the research was Aqsu, two land cuts were set up to determine the degree of actual erosion in the Qizmeydan village. prevent erosion intensity, take preventive measures to take and implement appropriate measures.

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